4s04

Crystal structure of Klebsiella pneumoniae PmrA in complex with PmrA box DNA

spinqualitylabelsall models 4s04, resolution 3.20Å Show:Asymmetric Unit Biological Assembly Drag the structure with the mouse to rotate   Export Animated Image   Print3D Structural highlights 4s04 is a 8 chain structure with sequence from Klebsiella pneumoniae JM45 and Synthetic construct. Full crystallographic information is available from OCA. For a guided tour on the structure components use FirstGlance. Method: X-ray diffraction, Resolution 3.2Å Ligands: BEF, MG Resources: FirstGlance, OCA, PDBe, RCSB, PDBsum, ProSAT Function A0A0R4I965_KLEPN Publication Abstract from PubMed PmrA, an OmpR/PhoB family response regulator, manages genes for antibiotic resistance. Phosphorylation of OmpR/PhoB response regulator induces the formation of a symmetric dimer in the N-terminal receiver domain (REC), promoting two C-terminal DNA-binding domains (DBDs) to recognize promoter DNA to elicit adaptive responses. Recently, determination of the KdpE-DNA complex structure revealed an REC-DBD interface in the upstream protomer that may be necessary for transcription activation. Here, we report the 3.2-A-resolution crystal structure of the PmrA-DNA complex, which reveals a similar yet different REC-DBD interface. However, NMR studies show that in the DNA-bound state, two domains tumble separately and an REC-DBD interaction is transiently populated in solution. Reporter gene analyses of PmrA variants with altered interface residues suggest that the interface is not crucial for supporting gene expression. We propose that REC-DBD interdomain dynamics and the DBD-DBD interface help PmrA interact with RNA polymerase holoenzyme to activate downstream gene transcription. Structure and dynamics of polymyxin-resistance-associated response regulator PmrA in complex with promoter DNA.,Lou YC, Weng TH, Li YC, Kao YF, Lin WF, Peng HL, Chou SH, Hsiao CD, Chen C Nat Commun. 2015 Nov 13;6:8838. doi: 10.1038/ncomms9838. PMID:26564787 From MEDLINE®/PubMed®, a database of the U.S. National Library of Medicine.

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