3luo

Crystal Structure and functional characterization of the thermophilic prolyl isomerase and chaperone SlyD

spinqualitylabelsall models 3luo, resolution 2.55Å Show:Asymmetric Unit Biological Assembly Drag the structure with the mouse to rotate   Export Animated Image   Print3D Structural highlights 3luo is a 2 chain structure with sequence from Thermus thermophilus HB8. Full crystallographic information is available from OCA. For a guided tour on the structure components use FirstGlance. Method: X-ray diffraction, Resolution 2.55Å Ligands: NIT, SIN, ZN Resources: FirstGlance, OCA, PDBe, RCSB, PDBsum, ProSAT Function Q5SLE7_THET8 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 SlyD (sensitive to lysis D; product of the slyD gene) is a prolyl isomerase [peptidyl-prolyl cis/trans isomerase (PPIase)] of the FK506 binding protein (FKBP) type with chaperone properties. X-ray structures derived from three different crystal forms reveal that SlyD from Thermus thermophilus consists of two domains representing two functional units. PPIase activity is located in a typical FKBP domain, whereas chaperone function is associated with the autonomously folded insert-in-flap (IF) domain. The two isolated domains are stable and functional in solution, but the presence of the IF domain increases the PPIase catalytic efficiency of the FKBP domain by 2 orders of magnitude, suggesting that the two domains act synergistically to assist the folding of polypeptide chains. The substrate binding surface of SlyD from T. thermophilus was mapped by NMR chemical shift perturbations to hydrophobic residues of the IF domain, which exhibits significantly reduced thermodynamic stability according to NMR hydrogen/deuterium exchange and fluorescence equilibrium transition experiments. Based on structural homologies, we hypothesize that this is due to the absence of a stabilizing beta-strand, suggesting in turn a mechanism for chaperone activity by 'donor-strand complementation.' Furthermore, we identified a conserved metal (Ni(2+)) binding site at the C-terminal SlyD-specific helical appendix of the FKBP domain, which may play a role in metalloprotein assembly. Crystal structure determination and functional characterization of the metallochaperone SlyD from Thermus thermophilus.,Low C, Neumann P, Tidow H, Weininger U, Haupt C, Friedrich-Epler B, Scholz C, Stubbs MT, Balbach J J Mol Biol. 2010 May 7;398(3):375-90. Epub 2010 Mar 15. PMID:20230833 From MEDLINE®/PubMed®, a database of the U.S. National Library of Medicine. See Also Peptidyl-prolyl cis-trans isomerase 3D structures

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