4fyc

Structural and functional characterizations of a thioredoxin-fold protein from Helicobacter pylori

spinqualitylabelsall models 4fyc, resolution 2.31Å Show:Asymmetric Unit Biological Assembly Drag the structure with the mouse to rotate   Export Animated Image   Print3D Structural highlights 4fyc is a 2 chain structure with sequence from Helicobacter pylori 26695. Full crystallographic information is available from OCA. For a guided tour on the structure components use FirstGlance. Method: X-ray diffraction, Resolution 2.31Å Ligands: PG4 Resources: FirstGlance, OCA, PDBe, RCSB, PDBsum, ProSAT Function O25140_HELPY Publication Abstract from PubMed Maturation of cytochrome c is carried out in the bacterial periplasm, where specialized thiol-disulfide oxidoreductases provide the correct reduction of oxidized apocytochrome c before covalent haem attachment. HP0377 from Helicobacter pylori is a thioredoxin-fold protein that has been implicated as a component of system II for cytochrome c assembly and shows limited sequence similarity to Escherichia coli DsbC, a disulfide-bond isomerase. To better understand the role of HP0377, its crystal structures have been determined in both reduced and partially oxidized states, which are highly similar to each other. Sedimentation-equilibrium experiments indicate that HP0377 is monomeric in solution. HP0377 adopts a thioredoxin fold but shows distinctive variations as in other thioredoxin-like bacterial periplasmic proteins. The active site of HP0377 closely resembles that of E. coli DsbC. A reductase assay suggests that HP0377 may play a role as a reductase in the biogenesis of holocytochrome c553 (HP1227). Binding experiments indicate that it can form a covalent complex with HP0518, a putative L,D-transpeptidase with a catalytic cysteine residue, via a disulfide bond. Furthermore, physicochemical properties of HP0377 and its R86A variant have been determined. These results suggest that HP0377 may perform multiple functions as a reductase in H. pylori. Structural and functional characterization of HP0377, a thioredoxin-fold protein from Helicobacter pylori.,Yoon JY, Kim J, An DR, Lee SJ, Kim HS, Im HN, Yoon HJ, Kim JY, Kim SJ, Han BW, Suh SW Acta Crystallogr D Biol Crystallogr. 2013 May;69(Pt 5):735-46. doi:, 10.1107/S0907444913001236. Epub 2013 Apr 11. PMID:23633582 From MEDLINE®/PubMed®, a database of the U.S. National Library of Medicine. See Also Thiol:disulfide interchange protein 3D structures

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