View source for 4xj3

==Crystal structure of Vibrio cholerae DncV GTP bound form==
<StructureSection load='4xj3' size='340' side='right' caption='[[4xj3]], [[Resolution|resolution]] 1.65&Aring;' scene=''>
== Structural highlights ==
<table><tr><td colspan='2'>[[4xj3]] is a 1 chain structure. Full crystallographic information is available from [http://oca.weizmann.ac.il/oca-bin/ocashort?id=4XJ3 OCA]. For a <b>guided tour on the structure components</b> use [http://oca.weizmann.ac.il/oca-docs/fgij/fg.htm?mol=4XJ3 FirstGlance]. <br>
</td></tr><tr id='ligand'><td class="sblockLbl"><b>[[Ligand|Ligands:]]</b></td><td class="sblockDat"><scene name='pdbligand=EDO:1,2-ETHANEDIOL'>EDO</scene>, <scene name='pdbligand=GTP:GUANOSINE-5-TRIPHOSPHATE'>GTP</scene>, <scene name='pdbligand=MG:MAGNESIUM+ION'>MG</scene></td></tr>
<tr id='related'><td class="sblockLbl"><b>[[Related_structure|Related:]]</b></td><td class="sblockDat">[[4xj1|4xj1]], [[4xj4|4xj4]], [[4xj5|4xj5]], [[4xj6|4xj6]]</td></tr>
<tr id='resources'><td class="sblockLbl"><b>Resources:</b></td><td class="sblockDat"><span class='plainlinks'>[http://oca.weizmann.ac.il/oca-docs/fgij/fg.htm?mol=4xj3 FirstGlance], [http://oca.weizmann.ac.il/oca-bin/ocaids?id=4xj3 OCA], [http://www.rcsb.org/pdb/explore.do?structureId=4xj3 RCSB], [http://www.ebi.ac.uk/pdbsum/4xj3 PDBsum]</span></td></tr>
</table>
== Function ==
[[http://www.uniprot.org/uniprot/DNCV_VIBCH DNCV_VIBCH]] Catalyzes the synthesis of cyclic AMP-GMP from ATP and GTP. Is also able to produce c-di-AMP and c-di-GMP from ATP and GTP, respectively; however, c-AMP-GMP is the dominant molecule produced by DncV in vivo. Is required for efficient V.cholerae intestinal colonization, and down-regulates the colonization-influencing process of chemotaxis. Is not active with dATP, TTP, UTP, and CTP. 
<div style="background-color:#fffaf0;">
== Publication Abstract from PubMed ==
Cyclic dinucleotides (CDNs) play key roles as second messengers and signaling molecules in bacteria and metazoans. The newly identified dinucleotide cyclase in Vibrio cholerae (DncV) produces three different CDNs containing two 3'-5' phosphodiester bonds, and its predominant product is cyclic GMP-AMP, whereas mammalian cyclic GMP-AMP synthase (cGAS) produces only cyclic GMP-AMP containing mixed 2'-5' phosphodiester bonds. We report the crystal structures of V. cholerae and Escherichia coli DncV in complex with various nucleotides in the pre-reaction states. The high-resolution structures revealed that DncV preferably recognizes ATP and GTP as acceptor and donor nucleotides, respectively, in the first nucleotidyl transfer reaction. Considering the recently reported intermediate structures, our pre-reaction state structures provide the precise mechanism of 3'-5' linked cyclic AMP-GMP production in bacteria. A comparison with cGAS in the pre-reaction states suggests that the orientation of the acceptor nucleotide primarily determines the distinct linkage specificities between DncV and cGAS.

Structural Basis for the Catalytic Mechanism of DncV, Bacterial Homolog of Cyclic GMP-AMP Synthase.,Kato K, Ishii R, Hirano S, Ishitani R, Nureki O Structure. 2015 Apr 1. pii: S0969-2126(15)00078-7. doi:, 10.1016/j.str.2015.01.023. PMID:25865248<ref>PMID:25865248</ref>

From MEDLINE&reg;/PubMed&reg;, a database of the U.S. National Library of Medicine.<br>
</div>
== References ==
<references/>
__TOC__
</StructureSection>
[[Category: Ishii, R]]
[[Category: Ishitani, R]]
[[Category: Kato, K]]
[[Category: Nureki, O]]
[[Category: Bacterial virulence]]
[[Category: Cyclic gmp-amp synthase]]
[[Category: Nucleotidyltransferase]]
[[Category: Transferase]]