View source for 4xj1


==Crystal structure of Vibrio cholerae DncV apo form==
<StructureSection load='4xj1' size='340' side='right'caption='[[4xj1]], [[Resolution|resolution]] 1.77&Aring;' scene=''>
== Structural highlights ==
<table><tr><td colspan='2'>[[4xj1]] is a 1 chain structure with sequence from [https://en.wikipedia.org/wiki/Vibrio_cholerae_O1_biovar_El_Tor_str._N16961 Vibrio cholerae O1 biovar El Tor str. N16961]. Full crystallographic information is available from [http://oca.weizmann.ac.il/oca-bin/ocashort?id=4XJ1 OCA]. For a <b>guided tour on the structure components</b> use [https://proteopedia.org/fgij/fg.htm?mol=4XJ1 FirstGlance]. <br>
</td></tr><tr id='method'><td class="sblockLbl"><b>[[Empirical_models|Method:]]</b></td><td class="sblockDat" id="methodDat">X-ray diffraction, [[Resolution|Resolution]] 1.77&#8491;</td></tr>
<tr id='ligand'><td class="sblockLbl"><b>[[Ligand|Ligands:]]</b></td><td class="sblockDat" id="ligandDat"><scene name='pdbligand=EDO:1,2-ETHANEDIOL'>EDO</scene>, <scene name='pdbligand=MSE:SELENOMETHIONINE'>MSE</scene></td></tr>
<tr id='resources'><td class="sblockLbl"><b>Resources:</b></td><td class="sblockDat"><span class='plainlinks'>[https://proteopedia.org/fgij/fg.htm?mol=4xj1 FirstGlance], [http://oca.weizmann.ac.il/oca-bin/ocaids?id=4xj1 OCA], [https://pdbe.org/4xj1 PDBe], [https://www.rcsb.org/pdb/explore.do?structureId=4xj1 RCSB], [https://www.ebi.ac.uk/pdbsum/4xj1 PDBsum], [https://prosat.h-its.org/prosat/prosatexe?pdbcode=4xj1 ProSAT]</span></td></tr>
</table>
== Function ==
[https://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.
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== 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>
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<div class="pdbe-citations 4xj1" style="background-color:#fffaf0;"></div>

==See Also==
*[[Cyclic GMP-AMP synthase 3D synthase|Cyclic GMP-AMP synthase 3D synthase]]
== References ==
<references/>
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</StructureSection>
[[Category: Large Structures]]
[[Category: Vibrio cholerae O1 biovar El Tor str. N16961]]
[[Category: Ishii R]]
[[Category: Ishitani R]]
[[Category: Kato K]]
[[Category: Nureki O]]