1mn2: Difference between revisions
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==MANGANESE PEROXIDASE SUBSTRATE BINDING SITE MUTANT E35Q, D179N== | ==MANGANESE PEROXIDASE SUBSTRATE BINDING SITE MUTANT E35Q, D179N== | ||
<StructureSection load='1mn2' size='340' side='right' caption='[[1mn2]], [[Resolution|resolution]] 2.00Å' scene=''> | <StructureSection load='1mn2' size='340' side='right'caption='[[1mn2]], [[Resolution|resolution]] 2.00Å' scene=''> | ||
== Structural highlights == | == Structural highlights == | ||
<table><tr><td colspan='2'>[[1mn2]] is a 1 chain structure with sequence from [http://en.wikipedia.org/wiki/Chrysosporium_pruinosum_(gilman_&_abbott)_carmich. Chrysosporium pruinosum (gilman & abbott) carmich.]. Full crystallographic information is available from [http://oca.weizmann.ac.il/oca-bin/ocashort?id=1MN2 OCA]. For a <b>guided tour on the structure components</b> use [http:// | <table><tr><td colspan='2'>[[1mn2]] is a 1 chain structure with sequence from [http://en.wikipedia.org/wiki/Chrysosporium_pruinosum_(gilman_&_abbott)_carmich. Chrysosporium pruinosum (gilman & abbott) carmich.]. Full crystallographic information is available from [http://oca.weizmann.ac.il/oca-bin/ocashort?id=1MN2 OCA]. For a <b>guided tour on the structure components</b> use [http://proteopedia.org/fgij/fg.htm?mol=1MN2 FirstGlance]. <br> | ||
</td></tr><tr id='ligand'><td class="sblockLbl"><b>[[Ligand|Ligands:]]</b></td><td class="sblockDat"><scene name='pdbligand=CA:CALCIUM+ION'>CA</scene>, <scene name='pdbligand=HEM:PROTOPORPHYRIN+IX+CONTAINING+FE'>HEM</scene>, <scene name='pdbligand=NAG:N-ACETYL-D-GLUCOSAMINE'>NAG</scene></td></tr> | </td></tr><tr id='ligand'><td class="sblockLbl"><b>[[Ligand|Ligands:]]</b></td><td class="sblockDat" id="ligandDat"><scene name='pdbligand=CA:CALCIUM+ION'>CA</scene>, <scene name='pdbligand=HEM:PROTOPORPHYRIN+IX+CONTAINING+FE'>HEM</scene>, <scene name='pdbligand=NAG:N-ACETYL-D-GLUCOSAMINE'>NAG</scene></td></tr> | ||
<tr id='gene'><td class="sblockLbl"><b>[[Gene|Gene:]]</b></td><td class="sblockDat">MNP1 ([http://www.ncbi.nlm.nih.gov/Taxonomy/Browser/wwwtax.cgi?mode=Info&srchmode=5&id=5306 Chrysosporium pruinosum (Gilman & Abbott) Carmich.])</td></tr> | <tr id='gene'><td class="sblockLbl"><b>[[Gene|Gene:]]</b></td><td class="sblockDat">MNP1 ([http://www.ncbi.nlm.nih.gov/Taxonomy/Browser/wwwtax.cgi?mode=Info&srchmode=5&id=5306 Chrysosporium pruinosum (Gilman & Abbott) Carmich.])</td></tr> | ||
<tr id='activity'><td class="sblockLbl"><b>Activity:</b></td><td class="sblockDat"><span class='plainlinks'>[http://en.wikipedia.org/wiki/Manganese_peroxidase Manganese peroxidase], with EC number [http://www.brenda-enzymes.info/php/result_flat.php4?ecno=1.11.1.13 1.11.1.13] </span></td></tr> | <tr id='activity'><td class="sblockLbl"><b>Activity:</b></td><td class="sblockDat"><span class='plainlinks'>[http://en.wikipedia.org/wiki/Manganese_peroxidase Manganese peroxidase], with EC number [http://www.brenda-enzymes.info/php/result_flat.php4?ecno=1.11.1.13 1.11.1.13] </span></td></tr> | ||
<tr id='resources'><td class="sblockLbl"><b>Resources:</b></td><td class="sblockDat"><span class='plainlinks'>[http:// | <tr id='resources'><td class="sblockLbl"><b>Resources:</b></td><td class="sblockDat"><span class='plainlinks'>[http://proteopedia.org/fgij/fg.htm?mol=1mn2 FirstGlance], [http://oca.weizmann.ac.il/oca-bin/ocaids?id=1mn2 OCA], [http://pdbe.org/1mn2 PDBe], [http://www.rcsb.org/pdb/explore.do?structureId=1mn2 RCSB], [http://www.ebi.ac.uk/pdbsum/1mn2 PDBsum], [http://prosat.h-its.org/prosat/prosatexe?pdbcode=1mn2 ProSAT]</span></td></tr> | ||
</table> | </table> | ||
== Function == | == Function == | ||
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__TOC__ | __TOC__ | ||
</StructureSection> | </StructureSection> | ||
[[Category: Large Structures]] | |||
[[Category: Manganese peroxidase]] | [[Category: Manganese peroxidase]] | ||
[[Category: Poulos, T L]] | [[Category: Poulos, T L]] | ||
Revision as of 11:39, 2 December 2020
MANGANESE PEROXIDASE SUBSTRATE BINDING SITE MUTANT E35Q, D179NMANGANESE PEROXIDASE SUBSTRATE BINDING SITE MUTANT E35Q, D179N
Structural highlights
Function[PEM1_PHACH] Catalyzes the oxidation of Mn(2+) to Mn(3+). The latter, acting as a diffusible redox mediator, is capable of oxidizing a variety of lignin compounds. Evolutionary Conservation Check, as determined by ConSurfDB. You may read the explanation of the method and the full data available from ConSurf. Publication Abstract from PubMedManganese peroxidase (MnP), an extracellular heme enzyme from the lignin-degrading basidiomycetous fungus, Phanerochaete chrysosporium, catalyzes the oxidation of MnII to MnIII. The latter, acting as a diffusible redox mediator, is capable of oxidizing a variety of lignin model compounds. The proposed MnII binding site of MnP consists of a heme propionate, three acidic ligands (Glu-35, Glu-39, and Asp-179), and two water molecules. Using crystallographic methods, this binding site was probed by altering the amount of MnII bound to the protein. Crystals grown in the absence of MnII, or in the presence of EDTA, exhibited diminished electron density at this site. Crystals grown in excess MnII exhibited increased electron density at the proposed binding site but nowhere else in the protein. This suggests that there is only one major MnII binding site in MnP. Crystal structures of a single mutant (D179N) and a double mutant (E35Q,D179N) at this site were determined. The mutant structures lack a cation at the MnII binding site. The structure of the MnII binding site is altered significantly in both mutants, resulting in increased access to the solvent and substrate. Crystal structures of substrate binding site mutants of manganese peroxidase.,Sundaramoorthy M, Kishi K, Gold MH, Poulos TL J Biol Chem. 1997 Jul 11;272(28):17574-80. PMID:9211904[1] From MEDLINE®/PubMed®, a database of the U.S. National Library of Medicine. See AlsoReferences |
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