4kt5

Structure of GrlR-GrlA complex

spinqualitylabelsall models 4kt5, resolution 2.70Å Show:Asymmetric Unit Biological Assembly Drag the structure with the mouse to rotate   Export Animated Image   Print3D Structural highlights 4kt5 is a 3 chain structure with sequence from Escherichia coli O157:H7. Full crystallographic information is available from OCA. For a guided tour on the structure components use FirstGlance. Method: X-ray diffraction, Resolution 2.7Å Ligands: MSE, PG4 Resources: FirstGlance, OCA, PDBe, RCSB, PDBsum, ProSAT Function Q7DB61_ECO57 Publication Abstract from PubMed The locus of enterocyte effacement (LEE) is essential for virulence of enterohaemorrhagic Escherichia coli (EHEC) and enteropathogenic E. coli (EPEC). The 41 genes of the LEE encode type III secretion system proteins and three associated regulators: Ler, GrlA and GrlR. Ler is a positive regulator for most of the LEE operons, including grlRA. GrlA controls the expression of ler, ehxCABD and flhDC operons. GrlR binds to GrlA and suppresses its function. Here we report the crystal structure of GrlR-GrlADelta (aa 1-106) complex (2:1) and its functional characterization. We show that GrlR interacts with the Helix-Turn-Helix motif of GrlA. Moreover, GrlA binds to the promoter DNA fragments of ler, ehxCABD and flhDC, and GrlR outcompetes with these promoter DNA sequences for the Helix-Turn-Helix motif of GrlA. These findings provide mechanistic insight into a regulatory module for the virulence of EPEC and EHEC, two important pathogens that cause devastating diseases. Structure of GrlR-GrlA complex that prevents GrlA activation of virulence genes.,Padavannil A, Jobichen C, Mills E, Velazquez-Campoy A, Li M, Leung KY, Mok YK, Rosenshine I, Sivaraman J Nat Commun. 2013 Oct 4;4:2546. doi: 10.1038/ncomms3546. PMID:24092262 From MEDLINE®/PubMed®, a database of the U.S. National Library of Medicine.

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