title: S100A6 - new facts and features.
abstract: S100A6 (calcyclin) is a 10.5kDa Ca(2+)-binding protein that belongs to the S100 protein family. S100A6 contains two EF-hand motifs responsible for binding of Ca(2+). It also binds Zn(2+) through not yet identified structures. Binding of Ca(2+) induces a conformational change in the S100A6 molecule which in consequence increases its overall hydrophobicity and allows for interaction with target proteins. S100A6 was found in different mammalian and avian (chicken) tissues. A high level of S100A6 is observed in epithelial cells, fibroblasts and in different kinds of cancer cells. The function of S100A6 is not clear at present, but it has been suggested that it may be involved in cell proliferation, cytoskeletal dynamics and tumorigenesis. Additionally, S100A6 might have some extracellular activities. This review presents new facts and features concerning the S100A6 protein.
authors.affiliation: Department of Molecular and Cellular Neurobiology, Nencki Institute of Experimental Biology, 02-093 Warsaw, Poland.
authors.forename: Wiesława
authors.initials: W
authors.lastname: Leśniak
authors.forename: Łukasz P
authors.initials: ŁP
authors.lastname: Słomnicki
authors.forename: Anna
authors.initials: A
authors.lastname: Filipek
mesh_terms: D000818:Animals; D018797:Cell Cycle Proteins / Q000737:chemistry / Q000235:genetics / Q000378:metabolism*; D002471:Cell Transformation, Neoplastic / Q000378:metabolism*; D006801:Humans; D051379:Mice; D009369:Neoplasms / Q000378:metabolism*; D011817:Rabbits; D051381:Rats; D000075383:S100 Calcium Binding Protein A6; D009418:S100 Proteins / Q000737:chemistry / Q000235:genetics / Q000378:metabolism*
chemical_list: D018797:Cell Cycle Proteins; D000075383:S100 Calcium Binding Protein A6; D009418:S100 Proteins; C055351:S100A6 protein, human