3kyf

Crystal structure of P4397 complexed with c-di-GMP

spinqualitylabelsall models 3kyf, resolution 2.10Å Show:Asymmetric Unit Biological Assembly Drag the structure with the mouse to rotate   Export Animated Image   Print3D Structural highlights 3kyf is a 1 chain structure with sequence from Pseudomonas putida KT2440. Full crystallographic information is available from OCA. For a guided tour on the structure components use FirstGlance. Method: X-ray diffraction, Resolution 2.1Å Ligands: 5GP Resources: FirstGlance, OCA, PDBe, RCSB, PDBsum, ProSAT Function YCGR_PSEPK Acts as a flagellar brake, regulating swimming and swarming in a bis-(3'-5') cyclic diguanylic acid (c-di-GMP)-dependent manner. Increasing levels of c-di-GMP lead to decreased motility (By similarity). Binds c-di-GMP with a dissociation constant of 165 nM. Binds 2 intercalated (c-di-GMP) dimers per subunit. 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 Cyclic diguanylate (c-di-GMP) is a global regulator that modulates pathogen virulence and biofilm formation in bacteria. Although a bioinformatic study revealed that PilZ domain proteins are the long-sought c-di-GMP binding proteins, the mechanism by which c-di-GMP regulates them is uncertain. Pseudomonas putida PP4397 is one such protein that contains YcgR-N and PilZ domains and the apo-PP4397 structure was solved earlier by the Joint Center for Structural Genomics. We determined the crystal structure of holo-PP4397 and found that two intercalated c-di-GMPs fit into the junction of its YcgR-N and PilZ domains. Moreover, c-di-GMP binding induces PP4397 to undergo a dimer-to-monomer transition. Interestingly, another PilZ domain protein, VCA0042, binds to a single molecule of c-di-GMP, and both its apo and holo forms are dimeric. Mutational studies and the additional crystal structure of holo-VCA0042 (L135R) showed that the Arg122 residue of PP4397 is crucial for the recognition of two molecules of c-di-GMP. Thus, PilZ domain proteins exhibit different c-di-GMP binding stoichiometry and quaternary structure, and these differences are expected to play a role in generating diverse forms of c-di-GMP-mediated regulation. Structure of PP4397 reveals the molecular basis for different c-di-GMP binding modes by Pilz domain proteins.,Ko J, Ryu KS, Kim H, Shin JS, Lee JO, Cheong C, Choi BS J Mol Biol. 2010 Apr 23;398(1):97-110. Epub 2010 Mar 10. PMID:20226196 From MEDLINE®/PubMed®, a database of the U.S. National Library of Medicine.

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