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Ras (protein)
Ras, from "Rat sarcoma virus", is a family of related proteins that are expressed in all animal cell lineages and organs. All Ras protein family members belong to a class of protein called small GTPase, and are involved in transmitting signals within cells ( cellular signal transduction). Ras is the prototypical member of the Ras superfamily of proteins, which are all related in three-dimensional structure and regulate diverse cell behaviours. When Ras is 'switched on' by incoming signals, it subsequently switches on other proteins, which ultimately turn on genes involved in cell growth, differentiation, and survival. Mutations in Ras genes can lead to the production of permanently activated Ras proteins, which can cause unintended and overactive signaling inside the cell, even in the absence of incoming signals. Because these signals result in cell growth and division, overactive Ras signaling can ultimately lead to cancer. The three Ras genes in humans (''HRAS'', '' KRAS' ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
HRAS
GTPase HRas, from "Harvey Rat sarcoma virus", also known as transforming protein p21 is an enzyme that in humans is encoded by the gene. The ''HRAS'' gene is located on the short (p) arm of chromosome 11 at position 15.5, from base pair 522,241 to base pair 525,549. HRas is a small G protein in the Ras subfamily of the Ras superfamily of small GTPases. Once bound to Guanosine triphosphate, H-Ras will activate a Raf kinase like c-Raf, the next step in the MAPK/ERK pathway. Function GTPase HRas is involved in regulating cell division in response to growth factor stimulation. Growth factors act by binding cell surface receptors that span the cell's plasma membrane. Once activated, receptors stimulate signal transduction events in the cytoplasm, a process by which proteins and second messengers relay signals from outside the cell to the cell nucleus and instructs the cell to grow or divide. The HRAS protein is a GTPase and is an early player in many signal transduction pathw ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Werner H
Werner may refer to: People * Werner (name), origin of the name and people with this name as surname and given name Fictional characters * Werner (comics), a German comic book character * Werner Von Croy, a fictional character in the ''Tomb Raider'' series * Werner von Strucker, a fictional character in the Marvel Comics universe * Werner, a fictional character in '' Darwin's Soldiers'' * Werner Ziegler, a fictional character from tv show Better Call Saul Geography * Werner, West Virginia * Mount Werner, a mountain that includes the Steamboat Ski Resort, in the Park Range of Colorado * Werner (crater), a crater in the south-central highlands of the Moon * Werner projection, an equal-area map projection preserving distances along parallels, central meridian and from the North pole Companies * Carsey-Werner, an American television and film production studio * Werner Enterprises, a Nebraska-based trucking company * Werner Co., a manufacturer of ladders * Werner Motors, an early aut ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Amino Acid
Amino acids are organic compounds that contain both amino and carboxylic acid functional groups. Although hundreds of amino acids exist in nature, by far the most important are the alpha-amino acids, which comprise proteins. Only 22 alpha amino acids appear in the genetic code. Amino acids can be classified according to the locations of the core structural functional groups, as Alpha and beta carbon, alpha- , beta- , gamma- or delta- amino acids; other categories relate to Chemical polarity, polarity, ionization, and side chain group type (aliphatic, Open-chain compound, acyclic, aromatic, containing hydroxyl or sulfur, etc.). In the form of proteins, amino acid '' residues'' form the second-largest component (water being the largest) of human muscles and other tissues. Beyond their role as residues in proteins, amino acids participate in a number of processes such as neurotransmitter transport and biosynthesis. It is thought that they played a key role in enabling l ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Alpha Helices
The alpha helix (α-helix) is a common motif in the secondary structure of proteins and is a right hand-helix conformation in which every backbone N−H group hydrogen bonds to the backbone C=O group of the amino acid located four residues earlier along the protein sequence. The alpha helix is also called a classic Pauling–Corey–Branson α-helix. The name 3.613-helix is also used for this type of helix, denoting the average number of residues per helical turn, with 13 atoms being involved in the ring formed by the hydrogen bond. Among types of local structure in proteins, the α-helix is the most extreme and the most predictable from sequence, as well as the most prevalent. Discovery In the early 1930s, William Astbury showed that there were drastic changes in the X-ray fiber diffraction of moist wool or hair fibers upon significant stretching. The data suggested that the unstretched fibers had a coiled molecular structure with a characteristic repeat of ≈. Astb ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Beta Strand
The beta sheet, (β-sheet) (also β-pleated sheet) is a common motif of the regular protein secondary structure. Beta sheets consist of beta strands (β-strands) connected laterally by at least two or three backbone hydrogen bonds, forming a generally twisted, pleated sheet. A β-strand is a stretch of polypeptide chain typically 3 to 10 amino acids long with backbone in an extended conformation. The supramolecular association of β-sheets has been implicated in the formation of the fibrils and protein aggregates observed in amyloidosis, notably Alzheimer's disease. History The first β-sheet structure was proposed by William Astbury in the 1930s. He proposed the idea of hydrogen bonding between the peptide bonds of parallel or antiparallel extended β-strands. However, Astbury did not have the necessary data on the bond geometry of the amino acids in order to build accurate models, especially since he did not then know that the peptide bond was planar. A refined versi ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Hras Secondary Structure Ribbon
GTPase HRas, from "Harvey Rat sarcoma virus", also known as transforming protein p21 is an enzyme that in humans is encoded by the gene. The ''HRAS'' gene is located on the short (p) arm of chromosome 11 at position 15.5, from base pair 522,241 to base pair 525,549. HRas is a small G protein in the Ras subfamily of the Ras superfamily of small GTPases. Once bound to Guanosine triphosphate, H-Ras will activate a Raf kinase like c-Raf, the next step in the MAPK/ERK pathway. Function GTPase HRas is involved in regulating cell division in response to growth factor stimulation. Growth factors act by binding cell surface receptors that span the cell's plasma membrane. Once activated, receptors stimulate signal transduction events in the cytoplasm, a process by which proteins and second messengers relay signals from outside the cell to the cell nucleus and instructs the cell to grow or divide. The HRAS protein is a GTPase and is an early player in many signal transduction pathways a ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Protein Splicing
Proteins are large biomolecules and macromolecules that comprise one or more long chains of amino acid residues. Proteins perform a vast array of functions within organisms, including catalysing metabolic reactions, DNA replication, responding to stimuli, providing structure to cells and organisms, and transporting molecules from one location to another. Proteins differ from one another primarily in their sequence of amino acids, which is dictated by the nucleotide sequence of their genes, and which usually results in protein folding into a specific 3D structure that determines its activity. A linear chain of amino acid residues is called a polypeptide. A protein contains at least one long polypeptide. Short polypeptides, containing less than 20–30 residues, are rarely considered to be proteins and are commonly called peptides. The individual amino acid residues are bonded together by peptide bonds and adjacent amino acid residues. The sequence of amino acid residues i ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Institute Of Cancer Research
The Institute of Cancer Research (the ICR) is a public research institute and a member institution of the University of London in London, United Kingdom, specialising in oncology. It was founded in 1909 as a research department of the Royal Marsden Hospital and joined the University of London in 2003. It has been responsible for a number of breakthrough discoveries, including that the basic cause of cancer is damage to DNA. The ICR occupies sites in Chelsea, Central London and Sutton, southwest London. The ICR provides both taught postgraduate degree programmes and research degrees and currently has around 340 students. Together with the Royal Marsden Hospital the ICR forms the largest comprehensive cancer centre in Europe, and was ranked first amongst all British higher education institutions in the ''Times Higher Education'' 2014 Research Excellence Framework Table of Excellence. In clinical medicine, 83% and in biological sciences, 96% of the ICR's academic research was a ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Robin Weiss
Robert Anthony "Robin" Weiss (born 20 February 1940) is a British molecular biologist, Professor of Viral Oncology at University College London and a member of the Nuffield Council on Bioethics. Research His research has focussed on retroviruses, initially as a means of understanding T-cell leukemia and other cancers, which may be caused by retroviruses. A break-through discovery in 1971 was that the retroviral genome in chickens follows the rules of Mendelian inheritance.Arlene Judith Klotzko.Robin Weiss: Relentless retrovirus researcher. '' The Scientist'' 2002, 16(21):60. Later his work moved on to HIV, also a retrovirus, and made several new important discoveries, most notably identifying CD4 on lymphocytes as the binding receptor for HIV. Career Before becoming professor at UCL, Weiss was director at The Institute of Cancer Research, London, from 1980 until 1989, after which he continued as director of research for a further nine years. Until 2005, Weiss was editor-in-chie ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Michael Wigler
Michael Howard Wigler (born September 3, 1947, in New York) is an American molecular biologist who has directed a laboratory at Cold Spring Harbor Laboratory since 1978 and is a member of the National Academy of Sciences. He is best known for developing methods to genetically engineer animal cells and his contributions to cancer, genomics and autism genetics. Education Wigler graduated from Princeton University in 1970, majoring in mathematics, and in 1978 received his PhD from Columbia University in microbiology, and has spent the remainder of his career at Cold Spring Harbor Laboratory (CSHL). Career Beginning in the late 1970s, at Columbia University, Wigler, Richard Axel and Saul Silverstein developed methods for engineering animal cells. These methods are the basis for many discoveries in mammalian genetics, and the means for producing protein therapeutics such as those used to treat heart disease, cancer and strokes. After moving to CSHL, Wigler continued his stud ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Robert Weinberg (biologist)
Robert Allan Weinberg (born November 11, 1942) is a biologist, Daniel K. Ludwig Professor for Cancer Research at Massachusetts Institute of Technology (MIT), director of the Ludwig Center of the MIT, and American Cancer Society Research Professor. His research is in the area of oncogenes and the genetic basis of human cancer. Robert Weinberg is also affiliated with the Broad Institute and is a founding member of the Whitehead Institute for Biomedical Research. Weinberg and Eric Lander, a colleague at M.I.T., are co-founders of Verastem, a biopharmaceutical company focused on discovering and developing drugs to treat cancer by targeting cancer stem cells. Career Weinberg earned SB in Biology from Massachusetts Institute of Technology in 1964 and PhD in Biology from the same institute in 1969. He was an instructor in biology at Stillman College in Tuscaloosa, Alabama (1965–1966), and a postdoc in Ernest Winocour's lab at the Weizmann Institute of Science (1969–1970) and ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Stuart A
Stuart may refer to: Names *Stuart (name), a given name and surname (and list of people with the name) Automobile * Stuart (automobile) Places Australia Generally *Stuart Highway, connecting South Australia and the Northern Territory Northern Territory *Stuart, the former name for Alice Springs (changed 1933) * Stuart Park, an inner city suburb of Darwin *Central Mount Stuart, a mountain peak Queensland * Stuart, Queensland, a suburb of Townsville * Mount Stuart, Queensland, a suburb of Townsville *Mount Stuart (Queensland), a mountain South Australia * Stuart, South Australia, a locality in the Mid Murray Council *Electoral district of Stuart, a state electoral district * Hundred of Stuart, a cadastral unit Canada *Stuart Channel, a strait in the Gulf of Georgia region of British Columbia United Kingdom *Castle Stuart United States *Stuart, Florida *Stuart, Iowa *Stuart, Nebraska *Stuart, Oklahoma *Stuart, Virginia *Stuart Township, Holt County, Nebrask ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
