View source for 8cgs


==Crystal structure of arsenite oxidase from Alcaligenes faecalis (Af Aio) bound to antimony oxyanion==
<StructureSection load='8cgs' size='340' side='right'caption='[[8cgs]], [[Resolution|resolution]] 1.84&Aring;' scene=''>
== Structural highlights ==
<table><tr><td colspan='2'>[[8cgs]] is a 8 chain structure with sequence from [https://en.wikipedia.org/wiki/Alcaligenes_faecalis Alcaligenes faecalis]. Full crystallographic information is available from [http://oca.weizmann.ac.il/oca-bin/ocashort?id=8CGS OCA]. For a <b>guided tour on the structure components</b> use [https://proteopedia.org/fgij/fg.htm?mol=8CGS 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]] 1.84&#8491;</td></tr>
<tr id='ligand'><td class="sblockLbl"><b>[[Ligand|Ligands:]]</b></td><td class="sblockDat" id="ligandDat"><scene name='pdbligand=4MO:MOLYBDENUM(IV)+ION'>4MO</scene>, <scene name='pdbligand=ACT:ACETATE+ION'>ACT</scene>, <scene name='pdbligand=CL:CHLORIDE+ION'>CL</scene>, <scene name='pdbligand=EDO:1,2-ETHANEDIOL'>EDO</scene>, <scene name='pdbligand=FES:FE2/S2+(INORGANIC)+CLUSTER'>FES</scene>, <scene name='pdbligand=GOL:GLYCEROL'>GOL</scene>, <scene name='pdbligand=MGD:2-AMINO-5,6-DIMERCAPTO-7-METHYL-3,7,8A,9-TETRAHYDRO-8-OXA-1,3,9,10-TETRAAZA-ANTHRACEN-4-ONE+GUANOSINE+DINUCLEOTIDE'>MGD</scene>, <scene name='pdbligand=NA:SODIUM+ION'>NA</scene>, <scene name='pdbligand=O:OXYGEN+ATOM'>O</scene>, <scene name='pdbligand=PEG:DI(HYDROXYETHYL)ETHER'>PEG</scene>, <scene name='pdbligand=PO4:PHOSPHATE+ION'>PO4</scene>, <scene name='pdbligand=SO4:SULFATE+ION'>SO4</scene>, <scene name='pdbligand=TRS:2-AMINO-2-HYDROXYMETHYL-PROPANE-1,3-DIOL'>TRS</scene>, <scene name='pdbligand=UJI:tetrakis(oxidanyl)antimony'>UJI</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=8cgs FirstGlance], [http://oca.weizmann.ac.il/oca-bin/ocaids?id=8cgs OCA], [https://pdbe.org/8cgs PDBe], [https://www.rcsb.org/pdb/explore.do?structureId=8cgs RCSB], [https://www.ebi.ac.uk/pdbsum/8cgs PDBsum], [https://prosat.h-its.org/prosat/prosatexe?pdbcode=8cgs ProSAT]</span></td></tr>
</table>
== Function ==
[https://www.uniprot.org/uniprot/AIOA_ALCFA AIOA_ALCFA] Involved in the detoxification of arsenic. Oxidizes As(III)O3(3-) (arsenite) to the somewhat less toxic As(V)O4(3-) (arsenate).
<div style="background-color:#fffaf0;">
== Publication Abstract from PubMed ==
Arsenic contamination of groundwater is among one of the biggest health threats affecting millions of people in the world. There is an urgent need for efficient arsenic biosensors where the use of arsenic metabolizing enzymes can be explored. In this work, we have solved four crystal structures of arsenite oxidase (Aio) in complex with arsenic and antimony oxyanions and the structures determined correspond to intermediate states of the enzymatic mechanism. These structural data were complemented with density-functional theory calculations providing a unique view of the molybdenum active site at different time points that, together with mutagenesis data, enabled to clarify the enzymatic mechanism and the molecular determinants for the oxidation of As(III) to the less toxic As(V) species.

Arsenite oxidase in complex with antimonite and arsenite oxyanions: Insights into the catalytic mechanism.,Engrola F, Correia MAS, Watson C, Romao CC, Veiros LF, Romao MJ, Santos-Silva T, Santini JM J Biol Chem. 2023 Aug;299(8):105036. doi: 10.1016/j.jbc.2023.105036. Epub 2023 , Jul 11. PMID:37442232<ref>PMID:37442232</ref>

From MEDLINE&reg;/PubMed&reg;, a database of the U.S. National Library of Medicine.<br>
</div>
<div class="pdbe-citations 8cgs" style="background-color:#fffaf0;"></div>
== References ==
<references/>
__TOC__
</StructureSection>
[[Category: Alcaligenes faecalis]]
[[Category: Large Structures]]
[[Category: Correia MAS]]
[[Category: Engrola F]]
[[Category: Romao MJ]]
[[Category: Santos-Silva T]]