title: A molecular clamp in the crystal structure of the N-terminal domain of the yeast Hsp90 chaperone.
abstract: Hsp90 is a highly specific chaperone for many signal transduction proteins, including steroid hormone receptors and a broad range of protein kinases. The crystal structure of the N-terminal domain of the yeast Hsp90 reveals a dimeric structure based on a highly twisted sixteen stranded beta-sheet, whose topology suggests a possible 30-domain-swapped structure for the intact Hsp90 dimer. The opposing faces of the beta-sheets in the dimer define a potential peptide-binding cleft, suggesting that the N-domain may serve as a molecular 'clamp' in the binding of ligand proteins to Hsp90.
authors.affiliation: Department of Biochemistry and Molecular Biology, University College London, UK.
authors.forename: C
authors.initials: C
authors.lastname: Prodromou
authors.forename: S M
authors.initials: SM
authors.lastname: Roe
authors.forename: P W
authors.initials: PW
authors.lastname: Piper
authors.forename: L H
authors.initials: LH
authors.lastname: Pearl
mesh_terms: D000595:Amino Acid Sequence; D001665:Binding Sites; D017124:Conserved Sequence; D018360:Crystallography, X-Ray; D019281:Dimerization; D005656:Fungal Proteins / Q000737:chemistry / Q000235:genetics / Q000378:metabolism; D018841:HSP90 Heat-Shock Proteins / Q000737:chemistry* / Q000235:genetics / Q000378:metabolism*; D006860:Hydrogen Bonding; D008024:Ligands; D008958:Models, Molecular; D010455:Peptides / Q000737:chemistry / Q000378:metabolism; D011487:Protein Conformation; D017510:Protein Folding; D012441:Saccharomyces cerevisiae / Q000737:chemistry
chemical_list: D005656:Fungal Proteins; D018841:HSP90 Heat-Shock Proteins; D008024:Ligands; D010455:Peptides