5v30

Crystal structure of the sensor domain of the transcriptional regulator HcpR from Porphyromonas Gingivalis

spinqualitylabelsall models 5v30, resolution 3.15Å Show:Asymmetric Unit Biological Assembly Drag the structure with the mouse to rotate   Export Animated Image   Print3D Structural highlights 5v30 is a 2 chain structure with sequence from Atcc 33277. Full crystallographic information is available from OCA. For a guided tour on the structure components use FirstGlance. Ligands: GOL, SO4 Gene: AT291_03060 (ATCC 33277) Resources: FirstGlance, OCA, PDBe, RCSB, PDBsum, ProSAT Publication Abstract from PubMed Although the HcpR regulator plays a vital step in initiation of the nitrosative stress response in many Gram-negative anaerobic bacteria, the molecular mechanisms that it uses to mediate gas sensing are not well understood. Here, a 2.6 A resolution crystal structure of the N-terminal sensing domain of the anaerobic periodontopathogen Porphyromonas gingivalis HcpR is presented. The protein has classical features of the regulators belonging to the FNR-CRP family and contains a hydrophobic pocket in its N-terminal sensing domain. It is shown that heme bound to HcpR exhibits heme iron as a hexacoordinate system in the absence of nitric oxide (NO) and that upon nitrosylation it transitions to a pentacoordinate system. Finally, small-angle X-ray scattering experiments on full-length HcpR reveal that the C-terminal DNA-binding domain of HcpR has a high degree of interdomain flexibility. Nitrosative stress sensing in Porphyromonas gingivalis: structure of and heme binding by the transcriptional regulator HcpR.,Belvin BR, Musayev FN, Burgner J, Scarsdale JN, Escalante CR, Lewis JP Acta Crystallogr D Struct Biol. 2019 Apr 1;75(Pt 4):437-450. doi:, 10.1107/S205979831900264X. Epub 2019 Apr 5. PMID:30988260 From MEDLINE®/PubMed®, a database of the U.S. National Library of Medicine.

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