External environment and oxidation threats DNA most

Recently a study has found that forces from external environment and oxidation may be the greatest threat to an organism's ability to repair damage to its own DNA. The results are published in the journal of the Proceedings of the National Academy of Sciences, which also publishes some other studies on Recombinant protein. The results are based on the first comprehensive, whole genome analysis of spontaneous mutation in the bacterium Escherichia coli.

"Our study investigated 11 DNA repair pathways previously identified as resulting in spontaneous mutations," said Foster, a professor in the IU Bloomington College of Arts and Sciences' Department of Biology. "The striking result was that only loss of the ability to prevent or repair oxidative DNA damage significantly impacted mutation rates. ... All other forms of DNA damage arising within the organism did not disturb the overall accuracy of DNA replication in normally growing cells.

"These results suggest that DNA repair pathways may exist primarily to defend against externally induced damage to the genome," she said. Foster's lab and her work concentrates on DNA mutagenesis and repair. E. coli is a bacterium discovered in mammalian digestive tracts. It's more known as a source of food poisoning. It was chosen for the research because the biological pathways that control DNA repair have changed little as more complex organisms evolved, increasing the chances that the study's results are applicable to higher forms of life, including humans.

Foster's lab created the world's most comprehensive picture of genetic mutation in the species by tracing changes in E. coli's complete genome over the course of 200,000 generations. The IU team concentrated on 11 processes identified in other studies as causing mutation when deactivated, to focus their investigation on the relative importance of the pathways that repair DNA damage to genetic mutation. The pathways were isolated using 11 different strains of E. coli, each defective for one of the specific pathways.

After investigation, the DNA repair pathways under investigation fell into three broad categories. They were the activities of error-prone DNA polymerases, repair of internally induced DNA damage, including oxidation, and repair of DNA damage due to external agents. Each pathway is more or less specific for a given type of DNA damage. External agents such as radiation, chemical compounds and platinum-based compounds, are forces that affect DNA. And internal agents that damage DNA are produced by the body's own normal processes. Oxidation occurs in the body as a result of metabolic processes that use oxygen, creating molecules known as "free radicals" that steal electrons from other molecules in the body, causing damage. Many types of cancer and even aging have been linked to DNA oxidation.

The IU scientists used whole genome sequencing to catalog the specific genetic changes that resulted from loss of each repair pathway. Foster said that, surprisingly, the IU team found that none of the pathways resulted in mutations except the ones that deal with damage from oxidation. This means that the other types of damage—from either internal or external causes—are not a great threat to normally growing cells.

These pathways may be important, however, when cells are exposed to external agents or other forms of stress. The more complete picture of genetic mutation—made possible by the IU team's previous documentation of the bacterium's evolution over 200,000 generations—is likely responsible for the difference in the study's results compared to previous research implicating all 11 DNA repair pathways in genetic mutation, Foster said.

"Previous studies on mutational processes have relied on reporter genes"—single genes that signal larger changes across the genome—"to detect mutations, and these may not be representative of the genome as a whole," she said. "While reporter genes can reveal important mutational processes that occur at particular spots in the DNA, when the whole genome is the target, these localized errors don't appear to contribute to overall mutation."

Foster's next step is investigate DNA repair functions in cells under stress, which may provide a more complete model for mutational processes in living human cells existing in different states and environments all over the body. The experiments and research can help scientists understand more about DNA repair in our body and the importance of them. Flarebio offers good-quality recombinant proteins like recombinant LARGE at good prices.

There are two key genes in epidermis that help a plant keep alive

It is known to all that the body of a plant consists of only three tissue systems - the outermost epidermal tissue, the inner tissue, and the vascular tissue. The epidermis is essential in protecting the body of a plant from external stresses, preventing organ fusions, and determining final organ shapes.

Scientists took Arabidopsis as a model plant and conducted a research using recombinant proteins. Then two kinds of genes, ATML1 and PDF2, have been identified to serve as a key factor involved in the formation of the epidermis. However, there were more remained to be researched about the functional importance of these two genes.

Now, Taku Takahashi and his colleagues at Okayama University in collaboration with a group at the University of Tokyo have provided compeling evidence that the two genes are essential for the growth of embryos in Arabidopsis.

They generated the double loss-of-function mutant of ATML1 and PDF2 and found that the complete loss of these two genes resulted in the embryonic arrest before seed germination.

They confirmed that the inhibition of the expression of ATML1 and PDF2 caused a severe defect in epidermis formation and organ fusions in leaves, stems and flowers.

All the findings provide important information to the understanding of how the identity of epidermal cells is established in the plant embryo. They are also benefit to further studies on how a plant body is formed. Flarebio offers superior recombinant proteins such as recombinant App at competitive prices.

Genome sequencing uncovers the adaptability of water bear in extreme environment

Water Bear is a small aquatic animal, also known as tardigrade. The issue of Nature - Communications published an article of latest research results on its genome sequence on September 20th. Through research using recombinant proteins, the study found that a kind of gene in the body of tardigrade, its protein can resist the DNA damage in human-cultured cells. This suggests that this protein which is specific for tardigrades may help cells to resist DNA damage sources.

Tardigrada can survive in extremely stressful environment (including vacuum), but scientists didn't know specifically how it survives in extreme environments. This ability of tardigrada prompted researchers to investigate its genome. The first genome sequencing results show that in the process of evolution of tardigrade, it obtains a large number of genes from other species by horizontal gene transfer (DNA transfer among genomes of different species). However, the rooted reason of tardigrada showing tolerance in extreme environment is still an unsolved mystery.

Takekazu Kunieda and colleagues at the University of Tokyo, Japan, presented to the high-quality genome of water bears which are known to tolerate high-pressure environment, and they found no evidence of large-scale horizontal gene transfer. But compared with flies and worms, the number of genes which are responsible for tolerating high-pressure environment was much more. In addition, they found a protein which binds to DNA and helps to protect cultured human cells from being affected by X-ray radiation, and they believed that the protein is unique for Tardigrada. Through a detailed comparison of tardigrada genes and genes from other species, the authors found that the gene designated as the genetic code of this protective protein may be specific to Tardigrada. These results don't support the viewpoint of the tolerance coming from horizontal gene transfer.

Although it remains unclear how tardigrada's unique adaptability play a role in the molecular level or organism level, the results of the study show that tardigrada has evolved and obtained unique "cheats" against high-pressure condition. Flarebio provides superior recombinant proteins such as recombinant Nrg2 at good prices.

HRG replacement therapy may provide a new strategy for the treatment of sepsis

When suffering from sepsis, controlling the shape and activity of key proteins of a group of white blood cells and raising the levels can improve the chance of survival and recovery, according some studies using recombinant proteins. Blood poisoning after injury or infection is called sepsis, and it is a major reason of death worldwide. When suffering from sepsis, the body's immune system would over operate, leading to blood insufficiency of its own tissues and organs and thus causing damages. However, the exact molecular mechanisms of sepsis and its processes are unclear.

Now, Professor Masahiro Horie West in Japan and his colleagues from Okayama University, Shujitsu University and Kinki University have shown that a natural protein called histidine-rich glycoprotein (HRG) plays a significant role in the prevention of sepsis. They found that HRG controls the shape and activities of leukocyte which is called neutrophil to make them flow freely and show right response in the fight against sepsis.

Nishibori team intended to verify the role of HRG, because when sepsis happens, HRG levels in patients drop dramatically. HRG protein is produced and secreted by the liver. It is known that HRG is involved in regulating the immune response as well as the promotion of antibacterial and antifungal activity. The research team induced sepsis in a group of mice and took the healthy group as a control group. They purified human plasma HRG and made use of a dose of HRG protein to treat certain sepsis mice.

The researchers found that mice given HRG rapidly showed spontaneous activity and began to recover from sepsis. Further investigation showed that inflammation of the lungs of the treated mice was much less than the untreated mice. The shape of neutrophils of mice given HRG was more rounded and spherical, which made them more freely to go through micro-capillaries and veins. While the neutrophils of sepsis mice showed irregular cell shapes. This in turn triggers unwanted activity, because metamorphotic neutrophil will attach to other cells and establish cell mass, restricting blood flow.

"The reduce of plasma HRG is a fundamental way of incidence of sepsis," the authors stated in their paper published in the journal eBioMedicine (2016) , "HRG replacement therapy may provide a new strategy for the treatment of sepsis."

Further research is needed in healthy subjects and patients with sepsis, upstream signaling processes involved in HRG action. Further research will also determine whether HRG dose may be a valuable method for the treatment of patients with sepsis. Flarebio provides you with high-quality recombinant proteins such as recombinant CDH4 at reasonable prices.

What is the disease that kills millions of American starfish?

Recently a large number of American starfish are found dead caused by strange diseases. There is no exaggerated that it may be called catastrophic. The researchers used recombinant proteins to conduct the research.

"It's staggering, really, the millions of stars that have died. It is not apocalyptic or extreme to say that," says Drew Harvell, a biologist at Cornell University, describing what is widely regarded as one of the worst marine disease events ever recorded.

The starfish is also called sea stars. Millions of the starfish died in recent years. They had their legs curl up and pull away from their bodies, breaking the animals to pieces before they turn to mush, often in a matter of days. Scientists are struggling to find out the reason. Once densely packed onto the rocks and on the ocean floor, the key predators are simply missing from some locations, their numbers cut by 95 percent or more.

As early as in 2013, this phenomenon called Sea Star Wasting Syndrome was noticed by rangers in Olympic National Park in Washington state. It has now been documented from California to Alaska, and led to die-off that is bigger and more widely spread than any seen before.

There was a group of researchers published their findings indicating strong evidence that a virus was causing the disease last year. Now researchers are studying why the so much more widespread and deadly. They are considering how warmer water brought by climate change is affecting the virus, starfish and the ecosystem. "We've had anomalously warm oceans for the last two years. Really, what we would call hot water. It is really the dominant thing to consider," Harvell said.

The problem is urgent to be solved even through it's hard to collect data on a big scale. The sea star is kind of the mascot of the intertidal. We should protect these sea stars, the ocean, the ecosystem, thus protecting ourselves. Flarebio provides recombinant proteins of high quality such as recombinant app.

Protein makes sense in a cell

More than a decade ago scientists found the sequencing of the human genome, and it was undoubtedly considered one of the greatest discoveries in biology. However, it was only the beginning of our in-depth understanding of how cells work. Genes are just blueprints and it is the proteins, genes' products that do much of the work in a cell. With the use of recombinant proteins like recombinant mouse proteins and recombinant horse proteins, a multinational team of scientists have sifted through cells of vastly different organisms, from amoebae to worms to mice to humans, to reveal how proteins fit together to build different cells and bodies.

The wonderful finding is a result of a collaboration between seven research groups from three countries, led by Professor Andrew Emili from the University of Toronto's Donnelly Centre and Professor Edward Marcotte from the University of Texas at Austin. The study uncovered tens of thousands of new protein interactions, accounting for about a quarter of all estimated protein contacts in a cell.

If one of these interactions is lost it can lead to disease, and the map can help scientists spot individual proteins that could be at the root of complex human disorders. Through open access databases, the data will be available to researchers across the world.

Proteins work in teams by sticking to each other to carry out their jobs. Many proteins come together to form so called molecular machines that play key roles, such a building new proteins or recycling those no longer needed by literally grinding them into reusable parts. But when it comes to the vast majority of proteins, for example, there are tens of thousands of them in human cells, we still don't know what they do. There are a lot of researchers interested in recombinant proteins focused on this topic.

Then Emili and Marcotte's map helps. Using a state-of-the-art method developed by the groups, the researchers were able to fish thousands of protein machineries out of cells and count individual proteins they are made of. They then built a network that, similar to social networks, offers clues into protein function based on which other proteins they hang out with. For example, a new and unstudied protein, whose role we don't yet know, is likely to be involved in fixing damage in a cell if it sticks to cell's known "handymen" proteins.

The study gathered information on protein machineries from nine species that represent the tree of life: baker's yeast, sea anemones, amoeba, flies, sea urchins, worms, frogs, mice and humans. The map expands the number of known proteins association over tenfold, and it will trace how they evolved as time goes on.

The researchers discovered that tens of thousands of protein associations remained unchanged since the first ancestral cell appeared, one billion years ago (!), preceding all of animal life on Earth. The researchers believe that, with tens of thousands of other new protein interactions, the map promises to open many more lines of research into links between proteins and disease, which they are keen to explore in depth over the coming years.

The study comes out in Nature on September 7. Protein assemblies in humans were often identical to those in other species, thus the study will provide the ability to study the genetic basis for a wide variety of diseases and how they present in different species. Hope more secrets can be found. Flarebio offer good-quality recombinant proteins of good quality such as recombinant Cdh9 at good prices.

To use gene therapy to replace retGC1 to restore visual function

Not so long ago there was a research about using gene therapy to replace retGC1 to restore visual function. In the research with recombinant proteins, mice lacking the protein retGC1, which is deficient in humans suffering Leber congenital amaurosis-1 (LCA1), a disorder that causes severe visual impairment beginning in infancy, received gene therapy to replace retGC1 and showed fully restored visual function that persisted for at least 6 months. The success would strongly support clinical testing of a gene therapy targeted to the retinas of LCA1 patients as the researchers concluded.

Sanford Boye, Shannon Boye, and coauthors from University of Florida College of Medicine, Gainesville, University of Oklahoma College of Medicine, Oklahoma City, and Salus University, Elkins Park, PA, are the authors of the article. They emphasize the need for a treatment strategy targeting the loss of cone function that occurs in the eyes of patients with LCA1. They describe a gene replacement approach that uses an adeno-associated viral (AAV) vector to deliver the gene encoding the retGC1 protein to the cone-rich central retina in an all-cone mouse model deficient in retGC1. They report their results conclusions in the article.

"This study shows the tremendous potential of recombinant (rAAV) gene therapy for the effective treatment of genetic causes of vision loss," says Editor-in-Chief Terence R. Flotte, MD, Celia and Isaac Haidak Professor of Medical Education and Dean, Provost, and Executive Deputy Chancellor, University of Massachusetts Medical School, Worcester, MA.

This article about the Gene therapy is available free on the Human Gene Therapy website before September 30, 2015. Want to know more? Go and see! Flarebio Biotech LLC is a National High-Tech Enterprise with research, production and sales as one. It offers recombinant proteins like recombinant KEL at good prices.

Scientists find the turning point that determines protein fate

The scientists just "resurrected" the ancient ancestor of an important human protein and studied its evolutionary history which has always constantly showing mutations and analyzed a large number of alternative histories. Research shows that only two special mutations occur can ancient proteins evolve into modern glucocorticoid receptor (GR). These two permissive mutations have no effect on protein function, but they are the key base of functional mutations. The researchers screened thousands of evolutionary pathways and found that ancient GR evolved the sensitivity to cortisol in only one way. Related research papers were published in the journal Nature which also published many other studies on recombinant proteins.

Senior author of the paper, Professor Joe Thornton said, "This key protein can exist because there is a turning point in the destiny. Maybe the evolution of many body systems is dependent on the rare events in evolutionary history." He inferred the possible sequence of ancient proteins and synthesized biochemically and introduced them into a living organism to study their function.

Researchers deeply analyzed the structural effects of mutations on ancient proteins and found such rare causes. Such mutations must meet three conditions: it must stabilize specific regions in protein structure; to maintain proper energy balance among functional conformations; and it can be compatible with the original architecture and derived structure. Few mutations can meet such stringent restrictions.

The researchers found that asiding permissive mutations and only introducing functional mutations, ancient GR can't evolve into what it is today. Subsequently, they build millions of gene copies of ancient GR and introduced random mutations into each copy and simulated various possibilities in the evolution. They also produced recombinant rat proteins and designed genetically-engineered yeasts, which only grow when functional GR comes out. The researchers introduced various mutant GR into these yeasts. One any permissive mutations occur, GR function can be restored and allows yeasts to grow. Studies have shown that except two permissive mutations in reality, other mutations all can't restore GR function.

This study helps people further understand the evolution process of protein function. "Being able to directly study variable historical events is very exciting," Thornton said. "If the evolutionary history happens all over again, the results may be completely different. For cellular biochemical systems, unpredictable genetic events also shut down other possibilities when opening an evolution door."

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Plant chemical that determines a honey bee's caste has been found

A study was reported in the journal Science Advances shows that broad developmental changes occur when honey bee larvae are switched from eating royal jelly to a diet of jelly that includes honey and beebread, which is a type of processed pollen. Beebread and honey contain p-coumaric acid, but royal jelly does not. Queens feed exclusively on royal jelly. Worker bees known as nurses feed the larvae according to the needs of the hive. The study also used some recombinant proteins to achieve some results.

Experiments revealed that ingesting p-coumaric acid pushes the honey bee larvae down a different developmental pathway from those fed only royal jelly. Some genes, about a third of the honey bee genome, are upregulated and another third are downregulated, changing the landscape of proteins available to help fight disease or develop the bees' reproductive parts.

"Consuming the phytochemical p-coumaric acid, which is ubiquitous in beebread and honey, alters the expression of a whole suite of genes involved in caste determination," said University of Illinois entomology professor and department head May Berenbaum, who conducted the study with research scientist Wenfu Mao and cell and developmental biology professor Mary Schuler.

According to May Berenbaum, compared with the question of what components in royal jelly lead to queen development for many years, what might be more important is which plant chemicals that can interfere with development.

"While previous molecular studies have provided simple snapshots of the gene transcript variations that are associated with the exposure of insects to natural and synthetic chemicals, the genomics approaches used in this study offer a significantly more complex perspective on the biochemical and physiological processes occurring in plant-insect interactions," said Schuler.

This research about how honey bee colonies determine which larvae will serve as workers and which will become queens shows that a plant chemical, p-coumaric acid, plays a key role in the bees' developmental fate. Flarebio provides you with superior recombinant proteins like recombinant CDH11 at good prices.

New ultra-fast algorithm makes biochemical and biomedical research speed 10 times faster

According to a new report, a professor from Innopolis University in Russia and scientists from the United States and France worked together to invent an ultra-fast algorithm of protein interaction modeling, which can make biochemical and biomedical research speed 10 times faster. The research used a lot of recombinant proteins.

One of the researchers Holo Dorf said, "The team of scientists from Russia, the United States and France successfully invented this protein interaction modeling. This method is dozens of times faster than similar computing system which is established on the basis of the interaction between two proteins."

Holo Dorf also said that there are dozens of kinds of computer systems used to calculate the interactions between proteins, but these systems are not suitable for the simultaneous simulation of a large number of interactions between proteins. The new method is able to do this. What's more, using the new method enables us to increase the calculation speed by 10 times to 100 times. The accuracy of the calculation results are not affected at the same time.

Scientists are currently working to develop drugs which can act directly on diseased cells without any side effects. Proteins are the most basic materials of the cells, while drugs will interact with the proteins in the body. To develop effective drugs without any side effects, we must study the interaction of different proteins and their characteristics in the human body.

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The susceptibility of sarcoma may be increased by some oncogenes

A recent study published in the journal Lancet Oncology showed that the germline mutations of some known oncogene may increase the susceptibility of sarcoma for individuals. Sarcoma is a rare bone and soft tissue cancer. An international team led by Australian researchers conducted targeted gene panel sequencing on more than 1,000 patients with sarcoma. In addition to known mutations associated with sarcoma, the sequence data also revealed that other types of genes related to cancer showed recurrent mutations, such as TP53, ERCC2, ATR, BRCA2 and ATM.

The researchers found that in these patients who received tests, more than half of them carried at least one mutation in cancer-related genes, and people who carrying a plurality of cancer-related mutations in genes showed increased risk of arly-onset sarcoma. They accounted for 1/5 of the people who received the test.

Corresponding author of the article DavidThomas said, "The combination of influence of various genes combined increased risk of sarcoma. More mutations a patient carry, cancer comes sooner. Previously we can't judge the populations and family at risk, but now we can better manage this risk and help these people to be treated in time of need."

Thomas and his colleagues focused on 72 potential genes with cancer risk and extracted extract DNA of blood or saliva samples of 1,162 sarcoma patients aged above 15 and conducted targeted gene panel sequencing. About 3/4 of the people are Caucasian, and about 15% of them with multiple primary cancer.

Researchers compared the control groups and found that about 55% of patients with sarcoma showed suspicious increase of germline mutations, and these variations appeared to be pathogenicity. Mutations mostly happened in TP53, BRCA2, ATM, ATR and ERCC2 genes.

The research team plans to continue to expand the current research results to conduct whole genome sequencing on the sample of people with risk of germline sarcoma.

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Scientists find a gene that controls the production of stem cells

When talking about stem cells, it seems hard to judge them. If too many new stem cells are produced, it may lead to cancer, while too few would inhibit the repair and maintenance of the body.

Good news comes here. USC researchers In Kyoung Mah from the lab of Francesca Mariani and colleagues at the University of California, San Diego, (UCSD) published a paper in the Stem Cell Reports. They describe a key gene in maintaining this critical balance between the results of producing too many and too few stem cells. The gene is called Prkci. It influences whether stem cells self-renew to produce more stem cells, or differentiate into more specialized cell types, such as blood or nerves.

The team conducted experiments by growing mouse embryonic stem cells, which lacked Prkci, into embryo-like structures in the lab. Without Prkci, the stem cells preferred self-renewal, and generated large numbers of stem cells, thus producing an abundance of secondary structures.

After careful inspection, the researchers found that stem cells lacking Prkci had many activated genes typical of stem cells, and some activated genes typical of cardiac, neural, and blood-forming cells. As a consequence, the loss of Prkci can also motivate stem cells to differentiate into the progenitor cells that form neurons, blood and heart muscle.

Prkci activates or deactivates a well-known group of interacting genes that are part of the "Notch signaling pathway to achieve the effects mentioned above. When Prkri is absent, the Notch pathway would produce a protein that signals to stem cells to make more stem cells. When Prkri is present, the Notch pathway just keeps silent and the stem cells all differentiate into specific cell types.

Their findings are good cues for the development of patient therapies. For example, patients with certain injuries or diseases may be benefit from them by using small molecule inhibitors to block the activity of Prkci, thus improve stem cell production. It will be wonderful to apply the findings to the case where stem cells are hard to generate.

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New understanding of the treatment of sickle cell disease

An international team of researchers found a new biophysical marker which can help to improve the awareness of the treatment of sickle cell disease, taking an important step to treat the inherited blood disease. Each year, about 80,000 to 100,000 Americans suffer from the disease. The results will be published online this week in the early version of Progress of National Academy (PNAS), which also has many other studies on recombinant proteins.

Patients with hemoglobin shape sickle cell disease show abnormal shape of hemoglobin. Hemoglobin is protein used by red cells in vivo to carry oxygen. The shape of normal red blood cells is biconcave disc-shaped and is easy to deform and stretch, which is easy to get through narrow blood vessels of the body. In sickle cell disease, abnormal hemoglobin forms fibers. When under the condition of hypoxia, it will lead red blood cells to become flattened, sickle-shaped or harden. The change in shape and hardness can make red blood cells be stuck in the blood vessels, preventing oxygen to be transported to the surrounding tissues. This can cause anemia and extreme pain, affecting the health of body tissues and organs.

Currently, hydroxyurea is the only drug approved by FDA for the treatment of sickle cell disease. The drug improves sickle of red blood cells and is used for the treatment of pain and alleviating the need of blood transfusions for some patients, but it is not effective in all patients. Researchers have long debated what the mechanism of the drug is. So they have conducted a lot of research using recombinant rat proteins.

In the current study, the international team evaluated the biophysical properties of red blood cells - the shape, surface area and volume, biomechanical properties - flexibility and viscosity under normal oxygen conditions and used electromagnetic waves to measure small differences in the physical properties. This technology is known as the common path interferometric microscope, which allows researchers to obtain three-dimensional images of the cells.

The researchers took blood samples from patients with sickle cell disease and divided them into four groups based on the density of red blood cells. The density of normal, disk-shaped red blood cells is minimum, while density of severe sickle cells is maximum. Then they collected blood samples of patients who received hydroxyurea treatment and not. Red blood cells of patients who received treatment showed improvement in physical and biological properties. In addition, physical properties-related red blood cells of patients receiving treatment is greatly related to erythrocytes compared with the level of fetal hemoglobin.

The researchers hope that these biophysical markers can be combined with biochemical and molecular markers to assess the severity of the suffering degree of patients to determine whether hydroxyurea therapy is effective and to monitor the effects of the treatment. Flarebio provides recombinant proteins such as recombinant ITGB2 at good prices.

ZMYND8 protein is able to inhibit the expression of tumor metastasis-related genes

Although this protein reads like a license plate number in European countries very much, ZMYND8 protein has been shown to have the effect of inhibiting metastasis of prostate cancer-related genes. The findings mainly came from the research on cell study and recombinant mouse proteins, and they were published online on July 28th in the journal Molecular Cell.

"These findings are quite important because metastasis is a complex process, and studying tumor metastasis is a big challenge for doctors." Dr. Min Gyu Lee is an associate professor of molecular and cellular oncology. He said, "Tumor metastasis is very important. We need to know the key of how tumor cells obtaining the ability of metastasis and invasion. Understanding how this process happens is crucial for doctors to prevent tumor metastasis. We believe that this study could help medical researchers better know and understand the process."

Dr. Lee's research focuses on the modification of proteins using recombinant proteins, and this step is crucial for gene regulation; wherein the acetylation and methylation of tumor development is the most common. Dr. Lee's research group believed that ZMYND8 is the "reader" of histone. Identifying histone modifications is likely to affect gene expression.

"The effect of histone acetylation and methylation on gene expression may receive the impact of specific binding proteins," said Dr. Lee. They found that ZMYND8 is the "reader" of histone marker H3K4mel and H3K14ac, and both of them are related to tumor metastasis-related genes.

The research team also noted that ZMYND8 also has synergy with another type of tumor marker "Eraser" JARID1D. Mutual cooperation between them can inhibit tumor metastasis-related genes. "These findings reveal an unknown mechanism of tumor metastasis suppressor, i.e. ZMYND8 genes can inhibit the expression of tumor metastasis-related genes through reading histone markers H3K4mel and H3K14ad its synergy with JARID1D."

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The mystery of Zika virus replication in the host cell has been uncovered

The mystery of Zika virus replication in the host cell has been uncovered. Recently, Yang Haitao research team from Tianjin University published an article in the journal Protein & Cell which also published some other studies on recombinant proteins (including recombinant dog proteins) to show the crystal structure of Zika virus helicase, unlocking the key process and mechanism of Zika virus replication. The results would play a positive role in the development of antiviral drugs.

In the study, Yang Haitao team successfully obtained the 3D image when Zika virus helicase was conducting function and binding to substrate. The researchers also showed the spatial structure of ternary complex formed by Zika virus helicase, adenosine triphosphate and metal catalyst ions at the atomic resolution level. In addition, they also successfully captured the intermediate state of Zika virus helicase binding to ATP and metal ions. This is the first time to reveal the structure when flavivirus family (a mosquito-borne virus, including Zika virus, dengue virus, yellow fever virus, West Nile virus, etc.) helicase binding to natural substrate ATP. Yang Haitao said, "Through the analysis of this structure, we can reveal the mechanism of how Zika virus helicase identifying ATP catalytic metal ions."

To explore the differences between Zika virus with other flavivirus members in the mechanism of replication, the researchers also resolved three-dimensional structure of complex when Zika virus helicase binding to genomic RNA. They found that a pathway across helicase was responsible for "seizing" RNA. Surprisingly, Zika virus helicase would undergo significant conformational changes after binding to RNA, while these kind of conformational changes were quite different to the helicase of dengue virus.

The study indicates that helicase of flavivirus family evolved a conservative molecular "motor" in the evolutionary process. It can turn chemical energy into mechanical energy through nucleoside triphosphate hydrolysis to implement "melting" in the process of viral replication; while making use of different "movement" mode, helicase of different virus members recognize and bind to genomic RNA in a different way to meet the needs of viral replication. Flarebio offers good-quality recombinant proteins such as recombinant EXT2 at competitive prices.

The replication of EBOV (Ebola virus) requires a modified human protein

The replication of EBOV (Ebola virus) requires a modified human protein. Although many recombinant human proteins have been developed, this new discovery may open a new door for the treatment of EBOV.

EBOV is one of the deadliest known human pathogens and can cause severe hemorrhagic fever. When EBOV replicate themselves within the cell, it makes its own proteins passes through the basic mechanisms of taking over and hijack the host cells.

In this study, virus fragments with no infectious were used to study viral gene expression. Small molecule drugs were used to inhibit the function of cellular pathways related to protein synthesis. These drugs and other pathways can reduce the viral gene expression, suggesting that the pathway blocked by the drugs may prevent EBOV replication. To confirm this, the research team cooperated with the University of Texas Medical Branch. Researchers at the university tested that when a small molecule they studied existed, the self-replication capacity of EBOV would show some changes. They found that when adding the drugs, the number of self-replication of EBOV reduced. The findings were published in the journal mBio, which also publishes some other studies on recombinant proteins.

In order to investigate the cause of this phenomenon, the study looked at what happened to certain viral proteins when the pathway opened and closed. They found that one of the proteins of EBOV, VP30, would accumulate in cells when the pathway opened, while it wouldn't accumulate when the pathway was closed. These results indicated that VP30 protein was the only viral protein that causes the phenomenon above.

"A protein synthesized by a virus needs an unusual part of the mechanism of a host protein synthesis. We have found that if blocking the function of this part, the viruses would show some problems when replicating themselves. Therefore, reducing the ability of a certain kind of proteins in viral replication, the entire replication cycle could be affected." explained Dr. John Connor, the corresponding author, associate professor of microbiology at Boston University school of Medicine.

According to the researchers, these findings identified a necessary and uniquely-modified human protein for Ebola virus to grow in cells. "Aiming at this human protein may present a new target for treatment of Ebola. These studies can help us understand and fight active or dormant Ebola virus infection." He added.

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The new mechanism of AMPK signaling regulating autophagy

Autophagy is a process of degrading cytoplasmic proteins and organelles relying on lysosomal pathway, and it has high conservatism in evolution. It exists widely in cells of animals from the yeast, nematodes, and fruit flies to higher vertebrates. In mammals, when cells sense external stimulation and nutritional signals, they would meet the physical needs of cells to promote the body's metabolism of certain proteins by degrading macromolecule like organelles which lose cell function and proteins which lose normal function. Autophagy not only provides recyclable materials for cell repair and cell regeneration but also can help cells resist pathogen invasion and nutritional deficiencies. Therefore, autophagy is generally considered as patron saint of sustaining cell life and maintenance its stability. However, the process of autophagy is extremely complicated, especially the fine regulation mechanism of autophagy. Explore how nutrition and hunger signals autophagy signals are integrated and transmitted to the downstream of autophagy has always been a hot topic of biological research. And all the studies can’t leave the use of different kinds of recombinant proteins such as recombinant horse proteins.

The formation of VPS34-VPS15-Beclin1 core complex would happen in the initial stage of autophagy. With other autophagy-related proteins such as Atg14L (autophagy-related protein 14) adding to the core complex, VPS34 (Ⅲ type phosphatidylinositol muscle alcohol 3-kinase) would gradually be activated and produce PtdIns3 P (phosphatidylinositol 3-phosphate) which plays an important promoting role on autophagic vacuole spreading taking PtdIns (phosphatidylinositol) as a substrate. When autophagy does not happen, Beclin1 would combine with Bcl2 and stay in resting state. Many kinases related to nutrition and growth such as mTOR and EGFR all can conduct phosphorylation on core scaffold protein Beclin1 in VPS34-VPS15-Beclin1 core complex to control the lipase activity of VPS34 in the way of changing the way the components of the complex, thereby affecting whether to conduct autophagy.

AMPK is an important kinase of cellular energy sensing and cell signaling regulation in autophagy process. Through research using recombinant rat proteins, researchers found that glucose would activate AMPK under condition of starvation, leading threonine 388 site in autophagic gene Beclin1 to show phosphorylation, promoting the dissociation of autophagy gene Beclin1 and Bcl2 and promoting the combination of Beclin1, VPS34 and Atg14L. These dissociation and binding changes makes VPS34 show extremely powerful catalytic activity, thereby producing a large number of PtdIns3 P to promote autophagic vacuoles to be generated at a near-hurricane-like velocity speed, greatly contributing to the occurrence and development of autophagy.

The study reveals the important role of Beclin1-T388 site in AMPK-mediated autophagy process during glucose deprivation, which provides important theoretical basis and feasible drug targets to further explore the molecular mechanism of autophagy and treatment of autophagy-related diseases and neurodegenerative diseases. Flarebio provides you with recombinant proteins like recombinant Cdh10 with good quality.

Chinese researchers find the gene that promotes breast cancer to metastasize

A study group led by Professor Gao Hua from Tongji University in China found TM4SF1 gene which promotes breast cancer to metastasize to multiple organs. There are also many other studies on some recombinant proteins that promote tumor metastasis. Related research papers were recently published in the journal Cell. Cutting off or preventing the expression of this gene may be the primary target to treat recurrence and metastasis of breast cancer. "Our research on targeted therapies has got good results." Gao Hua said.

Tumor recurrence and metastasis is the most direct cause of death of the vast majority of cancer patients. In early stage of breast cancer, tumor cells would leave the primary site "seed and grow" to fatal metastases at a plurality of far-end organs like lung, bone and brain. Despite the fact that the recurrence of tumor metastasis has important clinical significance, the related research is very weak, especially whether core genes exist in the process of tumor metastasis to multiple target organs is still unclear.

The human body has a kind of proteins which come across the lipid bilayer, and they are also known as transmembrane proteins. TM4SF1 is a member of transmembrane 4 protein family with specific evolution. They have up-regulated expression in lung cancer, colorectal cancer, breast cancer and ovarian cancer a variety of tumor compared with that in normal tissues. Over the years, Gao Hua study group used a mouse model as a screening tool in vivo to establish a high-throughput, genome-wide-level, function-related genetic screening platform in order to find out the molecules directly related to the recurrence and metastasis of breast cancer, lung cancer, colorectal cancer and other tumors and the cellular and molecular mechanism. In 2014, with the help of recombinant mouse proteins and recombinant dog proteins, the study group found that TM4SF1 played a very important role in self-renewing of normal and cancer stem cells.

On this basis, the study group continued to use immunohistochemical methods to analyze tissue microarray of 147 cases of breast cancer patients who had complete clinical information and found TM4SF1 genes had up-regulated expression in breast cancer patients, and the survival of patients was significantly shorter; Conversely, the survival was significantly prolonged. The computer bioinformatic analysis of 3,455 cases of primary site and metastatic tumor site of breast cancer also showed similar results.

Gao Hua said that according to the strength or weakness of TM4SF1 gene expression, they can predict the length of time of occurrence of breast cancer metastasis. "Currently, we are in accordance with the idea of translational medicine to cooperate with domestic enterprises to conduct treatment research on monoclonal antibodies and small molecule compounds. We have made good progress and achieved good results."

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Get to know the mechanism of air pollution inducing lung cancer

Through in-depth study, Zhou Guangbiao research group from Animal Institute of Chinese Academy of Sciences found the key long-chain non-coding RNA of air pollution-induced lung cancer. Related achievements were published recently in Oncology journal Oncotarge. According to study, some recombinant proteins can inhibit lung cancer.

It is understood that lung cancer has become the cancer with world's highest incidence and most deaths, and 90% of lung cancer is caused by smoking, air pollution and other environmental factors. However, the mechanism of air pollution-induced lung cancer molecular is unclear.

Previous studies have shown that air pollution can make organism genomes show a large number of mutation; inflammatory cytokines CXCL13, CXCL20, miRNA-144 and other factors play an important role in lung cancer air induced by pollution and smoking. In this study, the researchers analyzed the role of long-chain non-coding RNA (lncRNA) in lung cancer caused by air pollution.

It is understood that IncRNA is a class of non-coding RNA which can regulate gene expression in transcription, post-transcriptional and epigenetic levels. By lncRNA chip, the researchers found that lung cancer samples in air pollution area contained more lncRNA with abnormal expression, and CAR10 is a long non-coding RNA associated with air pollution. Studies have shown that high expression of CAR10 is associated with air pollution.

Further studies showed that dibenzanthracene in PAHs family promoted CAR10's expression in lung epithelial cells through transcription factor FoxF2, while after binding to transcription factor YB-1, CAR10 inhibits its degradation by the proteasome and causes accumulation of nucleus YB- 1 protein and promotes expression of epidermal growth factor, thereby promoting cell proliferation and inducing lung cancer. Flarebio provides you with high-quality recombinant proteins such as recombinant CDH11 at competitive prices.

Chinese institute promotes analysis of important protein structures

Recently, researcher Tang Chun group from Wuhan Institute of Physics and Mathematics, Chinese Academy of Sciences made use of the new research technology established and based on the 973 major scientific research program "New technological developments in protein research new approach" to assist Professor Yin Ping at Huazhong Agricultural University to firstly analyze the complex structure of N6 adenine methyltransferase METTL3-METTL14 protein, and the research findings were published in the journal Nature. The journal also provides other studies on recombinant proteins such as recombinant rat proteins.

The study reveals the structural basis of RNA N6 adenine methylation modification process and is a major breakthrough in the field of epigenetics. Tang Chun, associate researcher Gong Zhou and postdoctoral Liu Zhu at Wuhan Institute of Physics and Mathematics were involved in the project. They made use of new methods and technology developed by the research group to provide help in research approach for structural analysis of the protein complex through the method of combining of small angle X-ray scattering and computer simulation.

After nearly three years of efforts, Tang Chun group has developed and established a variety of biological, physical and chemical methods including NMR spectroscopy, small-angle X-ray scattering, chemical cross-linking mass spectrometry analysis, single molecule fluorescence detection and imaging technology. They also developed corresponding integration calculation method for the study of dynamic structure of protein and its conversion process. In addition to completing their own scientific research projects, the research group actively carries out extensive cooperation and exchanges and shared research technologies and methods with domestic and foreign counterparts. Currently, thanks to the implementation of the "New technologies and new approaches of protein dynamics studies" project, the research group has promoted the analysis of many important protein structures and made a series of research results. Their findings were published in world-class journals such as Nature - Chemical Biology and eLife. Flarebio provides you with various recombinant proteins including recombinant ECE1 of good quality at competitive price.