3s0m

<StructureSection load='3s0m' size='340' side='right' caption='[[3s0m]], [[Resolution|resolution]] 2.31&Aring;' scene=''>

<table><tr><td colspan='2'>[[3s0m]] is a 1 chain structure with sequence from [http://en.wikipedia.org/wiki/Bacillus_subtilis Bacillus subtilis]. Full crystallographic information is available from [http://oca.weizmann.ac.il/oca-bin/ocashort?id=3S0M OCA]. For a <b>guided tour on the structure components</b> use [http://oca.weizmann.ac.il/oca-docs/fgij/fg.htm?mol=3S0M FirstGlance]. <br>

</td></tr><tr><td class="sblockLbl"><b>[[Ligand|Ligands:]]</b></td><td class="sblockDat"><scene name='pdbligand=CO3:CARBONATE+ION'>CO3</scene>, <scene name='pdbligand=EDO:1,2-ETHANEDIOL'>EDO</scene>, <scene name='pdbligand=MN:MANGANESE+(II)+ION'>MN</scene>, <scene name='pdbligand=PEG:DI(HYDROXYETHYL)ETHER'>PEG</scene><br>

<tr><td class="sblockLbl"><b>[[Related_structure|Related:]]</b></td><td class="sblockDat">[[1j58|1j58]]</td></tr>

<tr><td class="sblockLbl"><b>[[Gene|Gene:]]</b></td><td class="sblockDat">BSU33240, oxalate decarboxylase, oxdC, yvrK ([http://www.ncbi.nlm.nih.gov/Taxonomy/Browser/wwwtax.cgi?mode=Info&srchmode=5&id=1423 Bacillus subtilis])</td></tr>

<tr><td class="sblockLbl"><b>Activity:</b></td><td class="sblockDat"><span class='plainlinks'>[http://en.wikipedia.org/wiki/Oxalate_decarboxylase Oxalate decarboxylase], with EC number [http://www.brenda-enzymes.info/php/result_flat.php4?ecno=4.1.1.2 4.1.1.2] </span></td></tr>

<tr><td class="sblockLbl"><b>Resources:</b></td><td class="sblockDat"><span class='plainlinks'>[http://oca.weizmann.ac.il/oca-docs/fgij/fg.htm?mol=3s0m FirstGlance], [http://oca.weizmann.ac.il/oca-bin/ocaids?id=3s0m OCA], [http://www.rcsb.org/pdb/explore.do?structureId=3s0m RCSB], [http://www.ebi.ac.uk/pdbsum/3s0m PDBsum]</span></td></tr>

<table>

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== Publication Abstract from PubMed ==

The conformational properties of an active-site loop segment, defined by residues Ser(161)-Glu(162)-Asn(163)-Ser(164), have been shown to be important for modulating the intrinsic reactivity of Mn(II) in the active site of Bacillus subtilis oxalate decarboxylase. We now detail the functional and structural consequences of removing a conserved Arg/Thr hydrogen-bonding interaction by site-specific mutagenesis. Hence, substitution of Thr-165 by a valine residue gives an OxDC variant (T165V) that exhibits impaired catalytic activity. Heavy-atom isotope effect measurements, in combination with the X-ray crystal structure of the T165V OxDC variant, demonstrate that the conserved Arg/Thr hydrogen bond is important for correctly locating the side chain of Glu-162, which mediates a proton-coupled electron transfer (PCET) step prior to decarboxylation in the catalytically competent form of OxDC. In addition, we show that the T165V OxDC variant exhibits a lower level of oxalate consumption per dioxygen molecule, consistent with the predictions of recent spin-trapping experiments [Imaram et al. (2011) Free Radicals Biol. Med. 50, 1009-1015]. This finding implies that dioxygen might participate as a reversible electron sink in two putative PCET steps and is not merely used to generate a protein-based radical or oxidized metal center.

 

A structural element that facilitates proton-coupled electron transfer in oxalate decarboxylase.,Saylor BT, Reinhardt LA, Lu Z, Shukla MS, Nguyen L, Cleland WW, Angerhofer A, Allen KN, Richards NG Biochemistry. 2012 Apr 3;51(13):2911-20. Epub 2012 Mar 19. PMID:22404040<ref>PMID:22404040</ref>

 

[[Category: Oxalate decarboxylase]]

[[Category: Allen, K N.]]

[[Category: Cleland, W W.]]

[[Category: Lu, Z.]]

[[Category: Reinhardt, L A.]]

[[Category: Richards, N G.J.]]

[[Category: Saylor, B T.]]

[[Category: Shukla, M S.]]

[[Category: Lyase]]