4hov: Difference between revisions
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==DypB N246A in complex with manganese== | |||
===DypB N246A in | <StructureSection load='4hov' size='340' side='right' caption='[[4hov]], [[Resolution|resolution]] 2.20Å' scene=''> | ||
== Structural highlights == | |||
<table><tr><td colspan='2'>[[4hov]] is a 3 chain structure with sequence from [http://en.wikipedia.org/wiki/Rhodococcus_jostii_rha1 Rhodococcus jostii rha1]. Full crystallographic information is available from [http://oca.weizmann.ac.il/oca-bin/ocashort?id=4HOV OCA]. For a <b>guided tour on the structure components</b> use [http://oca.weizmann.ac.il/oca-docs/fgij/fg.htm?mol=4HOV FirstGlance]. <br> | |||
</td></tr><tr id='ligand'><td class="sblockLbl"><b>[[Ligand|Ligands:]]</b></td><td class="sblockDat"><scene name='pdbligand=CL:CHLORIDE+ION'>CL</scene>, <scene name='pdbligand=FMT:FORMIC+ACID'>FMT</scene>, <scene name='pdbligand=GOL:GLYCEROL'>GOL</scene>, <scene name='pdbligand=HEM:PROTOPORPHYRIN+IX+CONTAINING+FE'>HEM</scene>, <scene name='pdbligand=MN:MANGANESE+(II)+ION'>MN</scene></td></tr> | |||
<tr id='related'><td class="sblockLbl"><b>[[Related_structure|Related:]]</b></td><td class="sblockDat">[[3vee|3vee]]</td></tr> | |||
<tr id='gene'><td class="sblockLbl"><b>[[Gene|Gene:]]</b></td><td class="sblockDat">dypB, RHA1_ro02407 ([http://www.ncbi.nlm.nih.gov/Taxonomy/Browser/wwwtax.cgi?mode=Info&srchmode=5&id=101510 Rhodococcus jostii RHA1])</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=4hov FirstGlance], [http://oca.weizmann.ac.il/oca-bin/ocaids?id=4hov OCA], [http://www.rcsb.org/pdb/explore.do?structureId=4hov RCSB], [http://www.ebi.ac.uk/pdbsum/4hov PDBsum]</span></td></tr> | |||
</table> | |||
<div style="background-color:#fffaf0;"> | |||
== Publication Abstract from PubMed == | |||
DypB, a dye-decolorizing peroxidase from the lignolytic soil bacterium Rhodococcus jostii RHA1, catalyzes the peroxide-dependent oxidation of divalent manganese (Mn(2+)), albeit less efficiently than fungal manganese peroxidases. Substitution of Asn246, a distal heme residue, with alanine increased the enzyme's apparent k(cat) and k(cat)/K(m) values for Mn(2+) by 80- and 15-fold, respectively. A 2.2 A resolution X-ray crystal structure of the N246A variant revealed the Mn(2+) to be bound within a pocket of acidic residues at the heme edge, reminiscent of the binding site in fungal manganese peroxidase and very different from that of another bacterial Mn(2+)-oxidizing peroxidase. The first coordination sphere was entirely composed of solvent, consistent with the variant's high K(m) for Mn(2+) (17 +/- 2 mM). N246A catalyzed the manganese-dependent transformation of hard wood kraft lignin and its solvent-extracted fractions. Two of the major degradation products were identified as 2,6-dimethoxybenzoquinone and 4-hydroxy-3,5-dimethoxybenzaldehyde, respectively. These results highlight the potential of bacterial enzymes as biocatalysts to transform lignin. | |||
Improved Manganese-Oxidizing Activity of DypB, a Peroxidase from a Lignolytic Bacterium.,Singh R, Grigg JC, Qin W, Kadla JF, Murphy ME, Eltis LD ACS Chem Biol. 2013 Jan 18. PMID:23305326<ref>PMID:23305326</ref> | |||
From MEDLINE®/PubMed®, a database of the U.S. National Library of Medicine.<br> | |||
</div> | |||
== References == | |||
<references/> | |||
__TOC__ | |||
</StructureSection> | |||
[[Category: Rhodococcus jostii rha1]] | [[Category: Rhodococcus jostii rha1]] | ||
[[Category: Eltis, L D | [[Category: Eltis, L D]] | ||
[[Category: Grigg, J C | [[Category: Grigg, J C]] | ||
[[Category: Murphy, M E.P | [[Category: Murphy, M E.P]] | ||
[[Category: Singh, R | [[Category: Singh, R]] | ||
[[Category: Dyp]] | [[Category: Dyp]] | ||
[[Category: Heme]] | [[Category: Heme]] | ||
Revision as of 12:32, 21 December 2014
DypB N246A in complex with manganese
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