View source for 4v14


==Structure and function analysis of MutT from the psychrofile fish pathogen Aliivibrio salmonicida and the mesophile Vibrio cholerae==
<StructureSection load='4v14' size='340' side='right'caption='[[4v14]], [[Resolution|resolution]] 2.42&Aring;' scene=''>
== Structural highlights ==
<table><tr><td colspan='2'>[[4v14]] is a 2 chain structure with sequence from [https://en.wikipedia.org/wiki/Vibrio_cholerae Vibrio cholerae]. Full crystallographic information is available from [http://oca.weizmann.ac.il/oca-bin/ocashort?id=4V14 OCA]. For a <b>guided tour on the structure components</b> use [https://proteopedia.org/fgij/fg.htm?mol=4V14 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]] 2.42&#8491;</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=4v14 FirstGlance], [http://oca.weizmann.ac.il/oca-bin/ocaids?id=4v14 OCA], [https://pdbe.org/4v14 PDBe], [https://www.rcsb.org/pdb/explore.do?structureId=4v14 RCSB], [https://www.ebi.ac.uk/pdbsum/4v14 PDBsum], [https://prosat.h-its.org/prosat/prosatexe?pdbcode=4v14 ProSAT]</span></td></tr>
</table>
== Function ==
[https://www.uniprot.org/uniprot/Q9KPH6_VIBCH Q9KPH6_VIBCH] 
<div style="background-color:#fffaf0;">
== Publication Abstract from PubMed ==
Upon infection by pathogenic bacteria, production of reactive oxygen species (ROS) is part of the host organism's first line of defence. ROS damage a number of macromolecules, and in order to withstand such a harsh environment, the bacteria need to have well-functioning ROS scavenging and repair systems. Herein, MutT is an important nucleotide-pool sanitization enzyme, which degrades 8-oxo-dGTP and thus prevents it from being incorporated into DNA. In this context, we have performed a comparative biochemical and structural analysis of MutT from the fish pathogen Aliivibrio salmonicida (AsMutT) and the human pathogen Vibrio cholerae (VcMutT), in order to analyse their function as nucleotide sanitization enzymes and also determine possible cold-adapted properties of AsMutT. The biochemical characterisation revealed that both enzymes possess activity towards the 8-oxo-dGTP substrate, and that AsMutT has a higher catalytic efficiency than VcMutT at all temperatures studied. Calculations based on the biochemical data also revealed a lower activation energy (E a) for AsMutT compared to VcMutT, and differential scanning calorimetry experiments showed that AsMutT displayed an unexpected higher melting temperature (T m) value than VcMutT. A comparative analysis of the crystal structure of VcMutT, determined to 2.42 A resolution, and homology models of AsMutT indicate that three unique Gly residues in loops of VcMutT, and additional long range ion-pairs in AsMutT could explain the difference in temperature stability of the two enzymes. We conclude that AsMutT is a stable, cold-active enzyme with high catalytic efficiency and reduced E a, compared to the mesophilic VcMutT.

MutT from the fish pathogen Aliivibrio salmonicida is a cold-active nucleotide-pool sanitization enzyme with unexpectedly high thermostability.,Lian K, Leiros HK, Moe E FEBS Open Bio. 2015 Feb 3;5:107-16. doi: 10.1016/j.fob.2015.01.006. eCollection, 2015. PMID:25737836<ref>PMID:25737836</ref>

From MEDLINE&reg;/PubMed&reg;, a database of the U.S. National Library of Medicine.<br>
</div>
<div class="pdbe-citations 4v14" style="background-color:#fffaf0;"></div>

==See Also==
*[[7%2C8-dihydro-8-oxoguanine triphosphatase 3D structures|7%2C8-dihydro-8-oxoguanine triphosphatase 3D structures]]
== References ==
<references/>
__TOC__
</StructureSection>
[[Category: Large Structures]]
[[Category: Vibrio cholerae]]
[[Category: Leiros H-KS]]
[[Category: Lian K]]
[[Category: Moe E]]