2jlj

Crystal Structure of the cytoplasmic domain of Yersinia pestis YscU N263A P264A mutant

spinqualitylabelsall models 2jlj, resolution 1.30Å Show:Asymmetric Unit Biological Assembly Drag the structure with the mouse to rotate   Export Animated Image   Print3D Structural highlights 2jlj is a 1 chain structure with sequence from Yersinia pestis. Full crystallographic information is available from OCA. For a guided tour on the structure components use FirstGlance. Method: X-ray diffraction, Resolution 1.3Å Resources: FirstGlance, OCA, PDBe, RCSB, PDBsum, ProSAT Function YSCU_YERPE Component of the yop secretion machinery (By similarity). 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 Crystal structures of cleaved and uncleaved forms of the YscU cytoplasmic domain, an essential component of the type III secretion system (T3SS) in Yersinia pestis, have been solved by single-wavelength anomolous dispersion and refined with X-ray diffraction data extending up to atomic resolution (1.13 A). These crystallographic studies provide structural insights into the conformational changes induced upon auto-cleavage of the cytoplasmic domain of YscU. The structures indicate that the cleaved fragments remain bound to each other. The conserved NPTH sequence that contains the site of the N263-P264 peptide bond cleavage is found on a beta-turn which, upon cleavage, undergoes a major reorientation of the loop away from the catalytic N263, resulting in altered electrostatic surface features at the site of cleavage. Additionally, a significant conformational change was observed in the N-terminal linker regions of the cleaved and noncleaved forms of YscU which may correspond to the molecular switch that influences substrate specificity. The YscU structures determined here also are in good agreement with the auto-cleavage mechanism described for the flagellar homolog FlhB and E. coli EscU. Atomic resolution structure of the cytoplasmic domain of Yersinia pestis YscU, a regulatory switch involved in type III secretion.,Lountos GT, Austin BP, Nallamsetty S, Waugh DS Protein Sci. 2009 Jan 6;18(2):467-474. PMID:19165725 From MEDLINE®/PubMed®, a database of the U.S. National Library of Medicine.

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