|
ADAMTS20
ADAMTS (short for a disintegrin and metalloproteinase with thrombospondin motifs) is a family of multidomain extracellular protease enzymes. 19 members of this family have been identified in humans, the first of which, ADAMTS1, was described in 1997. Known functions of the ADAMTS proteases include processing of procollagens and von Willebrand factor as well as cleavage of aggrecan, versican, brevican and neurocan, making them key remodeling enzymes of the extracellular matrix. They have been demonstrated to have important roles in connective tissue organization, coagulation, inflammation, arthritis, angiogenesis and cell migration. Homologous subfamily of ADAMTSL (ADAMTS-like) proteins, which lack enzymatic activity, has also been described. Most cases of thrombotic thrombocytopenic purpura arise from autoantibody-mediated inhibition of ADAMTS13. Like ADAMs, the name of the ADAMTS family refers to its disintegrin and metalloproteinase activity, and in the case of ADAMTS, the prese ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Thrombospondin
Thrombospondins (TSPs) are a family of secreted glycoproteins with antiangiogenic functions. Due to their dynamic role within the extracellular matrix they are considered matricellular proteins. The first member of the family, thrombospondin 1 (THBS1), was discovered in 1971 by Nancy L. Baenziger. Types The thrombospondins are a family of multifunctional proteins. The family consists of thrombospondins 1-5 and can be divided into 2 subgroups: A, which contains TSP-1 and TSP-2, and B, which contains TSP-3, TSP-4 and TSP-5 (also designated cartilage oligomeric protein or COMP). TSP-1 and TSP-2 are homotrimers, consisting of three identical subunits, whereas TSP-3, TSP-4 and TSP-5 are homopentamers. TSP-1 and TSP-2 are produced by immature astrocytes during brain development, which promotes the development of new synapses. Thrombospondin 1 Thrombospondin 1 (TSP-1) is encoded by THBS1. It was first isolated from platelets that had been stimulated with thrombin, and so was desig ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Protease
A protease (also called a peptidase, proteinase, or proteolytic enzyme) is an enzyme that catalyzes (increases reaction rate or "speeds up") proteolysis, breaking down proteins into smaller polypeptides or single amino acids, and spurring the formation of new protein products. They do this by cleaving the peptide bonds within proteins by hydrolysis, a reaction where water breaks bonds. Proteases are involved in many biological functions, including digestion of ingested proteins, protein catabolism (breakdown of old proteins), and cell signaling. In the absence of functional accelerants, proteolysis would be very slow, taking hundreds of years. Proteases can be found in all forms of life and viruses. They have independently evolved multiple times, and different classes of protease can perform the same reaction by completely different catalytic mechanisms. Hierarchy of proteases Based on catalytic residue Proteases can be classified into seven broad groups: * Serine prot ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
ADAMTS14
ADAMTS14 encodes a member of the ADAMTS protein family. Members of the family share several distinct protein modules, including a propeptide region, a metalloproteinase domain, a disintegrin-like domain, and a thrombospondin type 1 (TS) motif. Individual members of this family differ in the number of C-terminal TS motifs, and some have unique C-terminal domains. Mature enzyme is generated by the proteolytically process of the encoded preproprotein. The enzyme cleaves the amino-propeptides of fibrillar collagens, enabling collagen fibril formation prior to assembly of collagen, which is a major extracellular matrix (ECM) protein. References Genes {{gene-stub ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
ADAMTS12
A disintegrin and metalloproteinase with thrombospondin motifs 12 is an enzyme that in humans is encoded by the ''ADAMTS12'' gene. This gene encodes a member of the ADAMTS (a disintegrin and metalloproteinase with thrombospondin motifs) protein family. Members of the family share several distinct protein modules, including a propeptide region, a metalloproteinase domain, a disintegrin-like domain, and a thrombospondin type 1 (TS-1) motif. Individual members of this family differ in the number of C-terminal TS-1 motifs, and some have unique C-terminal domains. The enzyme encoded by this gene contains eight TS-1 motifs. It may play roles in pulmonary cells during fetal development or in tumor processes through its proteolytic activity or as a molecule potentially involved in regulation of cell adhesion. References Further reading * * * * * * * * External links * The MEROPS MEROPS is an online database for peptidases (also known as proteases, proteinases and proteolytic en ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
ADAMTS9
A disintegrin and metalloproteinase with thrombospondin motifs 9 is an enzyme that in humans is encoded by the ''ADAMTS9'' gene. This gene encodes a member of the ADAMTS (a disintegrin and metalloproteinase with thrombospondin motifs) protein family. Members of the family share several distinct protein modules, including a propeptide region, a metalloproteinase domain, a disintegrin-like domain, and a thrombospondin type 1 (TS) motif. Individual members of this family differ in the number of C-terminal TS motifs, and some have unique C-terminal domains. Members of the ADAMTS family have been implicated in the cleavage of proteoglycans, the control of organ shape during development, and the inhibition of angiogenesis. This gene is localized to chromosome 3p14.3-p14.2, an area known to be lost in hereditary renal tumors. References Further reading * * * * * * * * * External links * The MEROPS MEROPS is an online database for peptidases (also known as proteases, proteinases ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Antiangiogenic
An angiogenesis inhibitor is a substance that inhibits the growth of new blood vessels (angiogenesis). Some angiogenesis inhibitors are endogenous and a normal part of the body's control and others are obtained exogenously through pharmaceutical drugs or diet. While angiogenesis is a critical part of wound healing and other favorable processes, certain types of angiogenesis are associated with the growth of malignant tumors. Thus angiogenesis inhibitors have been closely studied for possible cancer treatment. Angiogenesis inhibitors were once thought to have potential as a " silver bullet" treatment applicable to many types of cancer, but the limitations of anti-angiogenic therapy have been shown in practice. Nonetheless, inhibitors are used to effectively treat cancer, macular degeneration in the eye, and other diseases that involve a proliferation of blood vessels. Mechanism of action When a tumor stimulates the growth of new vessels, it is said to have undergone an 'an ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
ADAMTS8
A disintegrin and metalloproteinase with thrombospondin motifs 8 is an enzyme that in humans is encoded by the ''ADAMTS8'' gene. Function This gene encodes a member of the ADAMTS (a disintegrin and metalloproteinase with thrombospondin motifs) protein family. Members of the family share several distinct protein modules, including a propeptide region, a metalloproteinase domain, a disintegrin-like domain, and a thrombospondin type 1 (TS) motif. Individual members of this family differ in the number of C-terminal TS motifs, and some have unique C-terminal domains. The enzyme encoded by this gene contains two C-terminal TS motifs, and disrupts angiogenesis in vivo. Clinical significance A number of disorders have been mapped in the vicinity of this gene, most notably lung neoplasms. References Further reading * * * * * * * * External links * The MEROPS MEROPS is an online database for peptidases (also known as proteases, proteinases and proteolytic enzymes) and thei ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
ADAMTS7
A disintegrin and metalloproteinase with thrombospondin motifs 7 (ADAMTS7) is an enzyme that in humans is encoded by the ''ADAMTS7'' gene on chromosome 15. It is ubiquitously expressed in many tissues and cell types. This enzyme catalyzes the degradation of cartilage oligomeric matrix protein (COMP) degradation. ADAMTS7 has been associated with cancer and arthritis in multiple tissue types. The ''ADAMTS7'' gene also contains one of 27 SNPs associated with increased risk of coronary artery disease. Structure Gene The ''ADAMTS7'' gene resides on chromosome 15 at the band 15q24.2 and contains 25 exons. Protein This 1686-amino acid protein belongs to the ADAMTS family and is one of 19 members known in humans. As an ADAMTS protein, ADAMTS7 contains a shared proteinase domain and an ancillary domain. The proteinase domain can be further divided into a signal peptide, a prodomain, a metalloproteinase domain, and a disintegrin-like domain. In particular, the metalloproteinase doma ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
ADAMTS6
ADAM metallopeptidase with thrombospondin type 1 motif 6 is a protein that in humans is encoded by the ADAMTS6 gene In biology, the word gene (from , ; "... Wilhelm Johannsen coined the word gene to describe the Mendelian units of heredity..." meaning ''generation'' or ''birth'' or ''gender'') can have several different meanings. The Mendelian gene is a b .... Function This gene encodes a member of the ADAMTS (a disintegrin and metalloproteinase with thrombospondin motifs) protein family. Members of the family share several distinct protein modules, including a propeptide region, a metalloproteinase domain, a disintegrin-like domain, and a thrombospondin type 1 (TS) motif. Individual members of this family differ in the number of C-terminal TS motifs, and some have unique C-terminal domains. The encoded preproprotein is proteolytically processed to generate the mature enzyme. Expression of this gene may be regulated by the cytokine TNF-alpha. Mutation in ADAMTS6 causes ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
ADAMTS5
A disintegrin and metalloproteinase with thrombospondin motifs 5 also known as ADAMTS5 is an enzyme that in humans is encoded by the ''ADAMTS5'' gene. Function ADAMTS5 is a member of the ADAMTS (a disintegrin and metalloproteinase with thrombospondin motifs) protein family. Members of the family share several distinct protein modules, including a propeptide region, a metalloproteinase domain, a disintegrin-like domain, and a thrombospondin type 1 (TS) motif. Individual members of this family differ in the number of C-terminal TS motifs, and some have unique C-terminal domains. The enzyme encoded by this gene contains two C-terminal TS motifs and functions as aggrecanase to cleave aggrecan, a major proteoglycan of cartilage. ADAMTS5 may also have a role in the pathogenesis of human osteoarthritis. Animal studies Genetically modified mice in which the catalytic domain of ADAMTS5 was deleted are resistant to cartilage destruction in an experimental model of osteoarthritis. AD ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
ADAMTS4
A disintegrin and metalloproteinase with thrombospondin motifs 4 is an enzyme that in humans is encoded by the ''ADAMTS4'' gene. This gene encodes a member of the ADAMTS (a disintegrin and metalloproteinase with thrombospondin motifs) protein family. Members of the family share several distinct protein modules, including a propeptide region, a metalloproteinase domain, a disintegrin-like domain, and a thrombospondin type 1 (TS) motif. Individual members of this family differ in the number of C-terminal TS motifs, and some have unique C-terminal domains. The enzyme encoded by this gene lacks a C-terminal TS motif. It can degrade aggrecan, a major proteoglycan of cartilage, brevican, a brain-specific extracellular matrix protein, neurocan and versican. The cleavage of aggrecan and brevican suggests key roles of this enzyme in arthritic disease and in the central nervous system, potentially, in the progression of glioma. Structure ADAMTS4 is the shortest known ADAMTS, lacking th ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
