2bug | pdb_00002bug

SOLUTION STRUCTURE OF THE TPR DOMAIN FROM PROTEIN PHOSPHATASE 5 IN COMPLEX WITH HSP90 DERIVED PEPTIDE

spinqualitylabelsall models 2bug, 19 NMR models Show:Asymmetric Unit Biological Assembly Drag the structure with the mouse to rotate   Export Animated Image   Print3D Structural highlights 2bug is a 2 chain structure with sequence from Homo sapiens. Full experimental information is available from OCA. For a guided tour on the structure components use FirstGlance. NonStd Res: ACE Related: 1a17, 1s95, 1wao Activity: Phosphoprotein phosphatase, with EC number 3.1.3.16 Resources: FirstGlance, OCA, RCSB, PDBsum Evolutionary Conservation Check, as determined by ConSurfDB. You may read the explanation of the method and the full data available from ConSurf. Publication Abstract from PubMed Protein phosphatase 5 (Ppp5) is one of several proteins that bind to the Hsp90 chaperone via a tetratricopeptide repeat (TPR) domain. We report the solution structure of a complex of the TPR domain of Ppp5 with the C-terminal pentapeptide of Hsp90. This structure has the "two-carboxylate clamp" mechanism of peptide binding first seen in the Hop-TPR domain complexes with Hsp90 and Hsp70 peptides. However, NMR data reveal that the Ppp5 clamp is highly dynamic, and that there are multiple modes of peptide binding and mobility throughout the complex. Although this interaction is of very high affinity, relatively few persistent contacts are found between the peptide and the Ppp5-TPR domain, thus explaining its promiscuity in binding both Hsp70 and Hsp90 in vivo. We consider the possible implications of this dynamic structure for the mechanism of relief of autoinhibition in Ppp5 and for the mechanisms of TPR-mediated recognition of Hsp90 by other proteins. Conformational diversity in the TPR domain-mediated interaction of protein phosphatase 5 with Hsp90.,Cliff MJ, Harris R, Barford D, Ladbury JE, Williams MA Structure. 2006 Mar;14(3):415-26. PMID:16531226 From MEDLINE®/PubMed®, a database of the U.S. National Library of Medicine. See Also Protein phosphatase Serine/threonine protein phosphatase

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