title: Tissue inhibitors of metalloproteinases.
abstract: Orchestration of the growth and remodeling of tissues and responses of cells to their extracellular environment is mediated by metalloproteinases of the Metzincin clan. This group of proteins comprises several families of endopeptidases in which a zinc atom is liganded at the catalytic site to three histidine residues and an invariant methionine residue. Tissue inhibitors of metalloproteinases (TIMPs) are endogenous protein regulators of the matrix metalloproteinase (MMPs) family, and also of families such as the disintegrin metalloproteinases (ADAM and ADAMTS). TIMPs therefore have a pivotal role in determining the influence of the extracellular matrix, of cell adhesion molecules, and of many cytokines, chemokines and growth factors on cell phenotype. The TIMP family is an ancient one, with a single representative in lower eukaryotes and four members in mammals. Although much is known about their mechanism of action in proteinase regulation in mammalian cells, less is known about their functions in lower organisms. Recently, non-inhibitory functions of TIMPs have been identified in mammalian cells, including signaling roles downstream of specific receptors. There are clearly still questions to be answered with regard to their overall roles in biology.
authors.affiliation: Department of Oncology, University of Cambridge, Cancer Research UK Cambridge Research Institute, Li Ka Shing Centre, Cambridge, UK. gm290@cam.ac.uk
authors.forename: Gillian
authors.initials: G
authors.lastname: Murphy
mesh_terms: D000818:Animals; D005075:Biological Evolution; D020134:Catalytic Domain; D019483:Disintegrins / Q000737:chemistry / Q000235:genetics / Q000378:metabolism; D004331:Drosophila melanogaster; D006801:Humans; D008322:Mammals; D061965:Matrix Metalloproteinase Inhibitors; D020782:Matrix Metalloproteinases / Q000378:metabolism; D008958:Models, Molecular; D010802:Phylogeny; D011485:Protein Binding; D020033:Protein Isoforms / Q000737:chemistry / Q000235:genetics / Q000378:metabolism; D015398:Signal Transduction; D019714:Tissue Inhibitor of Metalloproteinases / Q000737:chemistry / Q000235:genetics / Q000378:metabolism*
chemical_list: D019483:Disintegrins; D061965:Matrix Metalloproteinase Inhibitors; D020033:Protein Isoforms; D019714:Tissue Inhibitor of Metalloproteinases; D020782:Matrix Metalloproteinases
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