3t0c: Difference between revisions
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==Crystal structure of Streptococcus mutans MetE complexed with Zinc== | ==Crystal structure of Streptococcus mutans MetE complexed with Zinc== | ||
<StructureSection load='3t0c' size='340' side='right' caption='[[3t0c]], [[Resolution|resolution]] 2.19Å' scene=''> | <StructureSection load='3t0c' size='340' side='right' caption='[[3t0c]], [[Resolution|resolution]] 2.19Å' scene=''> | ||
== Structural highlights == | == Structural highlights == | ||
<table><tr><td colspan='2'>[[3t0c]] is a 1 chain structure with sequence from [http://en.wikipedia.org/wiki/ | <table><tr><td colspan='2'>[[3t0c]] is a 1 chain structure with sequence from [http://en.wikipedia.org/wiki/Atcc_25175 Atcc 25175]. This structure supersedes the now removed PDB entry [http://oca.weizmann.ac.il/oca-bin/send-pdb?obs=1&id=3l7s 3l7s]. Full crystallographic information is available from [http://oca.weizmann.ac.il/oca-bin/ocashort?id=3T0C OCA]. For a <b>guided tour on the structure components</b> use [http://oca.weizmann.ac.il/oca-docs/fgij/fg.htm?mol=3T0C FirstGlance]. <br> | ||
</td></tr><tr id='ligand'><td class="sblockLbl"><b>[[Ligand|Ligands:]]</b></td><td class="sblockDat"><scene name='pdbligand=SO4:SULFATE+ION'>SO4</scene>, <scene name='pdbligand=ZN:ZINC+ION'>ZN</scene></td></tr> | </td></tr><tr id='ligand'><td class="sblockLbl"><b>[[Ligand|Ligands:]]</b></td><td class="sblockDat"><scene name='pdbligand=SO4:SULFATE+ION'>SO4</scene>, <scene name='pdbligand=ZN:ZINC+ION'>ZN</scene></td></tr> | ||
<tr id='related'><td class="sblockLbl"><b>[[Related_structure|Related:]]</b></td><td class="sblockDat">[[3l7r|3l7r]], [[2nq5|2nq5]]</td></tr> | <tr id='related'><td class="sblockLbl"><b>[[Related_structure|Related:]]</b></td><td class="sblockDat">[[3l7r|3l7r]], [[2nq5|2nq5]]</td></tr> | ||
<tr id='gene'><td class="sblockLbl"><b>[[Gene|Gene:]]</b></td><td class="sblockDat">metE ([http://www.ncbi.nlm.nih.gov/Taxonomy/Browser/wwwtax.cgi?mode=Info&srchmode=5&id=1309 | <tr id='gene'><td class="sblockLbl"><b>[[Gene|Gene:]]</b></td><td class="sblockDat">metE ([http://www.ncbi.nlm.nih.gov/Taxonomy/Browser/wwwtax.cgi?mode=Info&srchmode=5&id=1309 ATCC 25175])</td></tr> | ||
<tr id='activity'><td class="sblockLbl"><b>Activity:</b></td><td class="sblockDat"><span class='plainlinks'>[http://en.wikipedia.org/wiki/5-methyltetrahydropteroyltriglutamate--homocysteine_S-methyltransferase 5-methyltetrahydropteroyltriglutamate--homocysteine S-methyltransferase], with EC number [http://www.brenda-enzymes.info/php/result_flat.php4?ecno=2.1.1.14 2.1.1.14] </span></td></tr> | <tr id='activity'><td class="sblockLbl"><b>Activity:</b></td><td class="sblockDat"><span class='plainlinks'>[http://en.wikipedia.org/wiki/5-methyltetrahydropteroyltriglutamate--homocysteine_S-methyltransferase 5-methyltetrahydropteroyltriglutamate--homocysteine S-methyltransferase], with EC number [http://www.brenda-enzymes.info/php/result_flat.php4?ecno=2.1.1.14 2.1.1.14] </span></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=3t0c FirstGlance], [http://oca.weizmann.ac.il/oca-bin/ocaids?id=3t0c OCA], [http://www.rcsb.org/pdb/explore.do?structureId=3t0c RCSB], [http://www.ebi.ac.uk/pdbsum/3t0c PDBsum]</span></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=3t0c FirstGlance], [http://oca.weizmann.ac.il/oca-bin/ocaids?id=3t0c OCA], [http://pdbe.org/3t0c PDBe], [http://www.rcsb.org/pdb/explore.do?structureId=3t0c RCSB], [http://www.ebi.ac.uk/pdbsum/3t0c PDBsum], [http://prosat.h-its.org/prosat/prosatexe?pdbcode=3t0c ProSAT]</span></td></tr> | ||
</table> | </table> | ||
== Function == | == Function == | ||
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From MEDLINE®/PubMed®, a database of the U.S. National Library of Medicine.<br> | From MEDLINE®/PubMed®, a database of the U.S. National Library of Medicine.<br> | ||
</div> | </div> | ||
<div class="pdbe-citations 3t0c" style="background-color:#fffaf0;"></div> | |||
== References == | == References == | ||
<references/> | <references/> | ||
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</StructureSection> | </StructureSection> | ||
[[Category: 5-methyltetrahydropteroyltriglutamate--homocysteine S-methyltransferase]] | [[Category: 5-methyltetrahydropteroyltriglutamate--homocysteine S-methyltransferase]] | ||
[[Category: | [[Category: Atcc 25175]] | ||
[[Category: Fu, T M]] | [[Category: Fu, T M]] | ||
[[Category: Liang, Y H]] | [[Category: Liang, Y H]] | ||
Revision as of 13:19, 4 August 2016
Crystal structure of Streptococcus mutans MetE complexed with ZincCrystal structure of Streptococcus mutans MetE complexed with Zinc
Structural highlights
Function[METE_STRMU] Catalyzes the transfer of a methyl group from 5-methyltetrahydrofolate to homocysteine resulting in methionine formation (By similarity). Publication Abstract from PubMedCobalamin-independent methionine synthase (MetE) catalyzes the direct transfer of a methyl group from methyltetrahydrofolate to l-homocysteine to form methionine. Previous studies have shown that the MetE active site coordinates a zinc atom, which is thought to act as a Lewis acid and plays a role in the activation of thiol. Extended X-ray absorption fine structure studies and mutagenesis experiments identified the zinc-binding site in MetE from Escherichia coli. Further structural investigations of MetE from Thermotoga maritima lead to the proposition of two models: "induced fit" and "dynamic equilibrium", to account for the catalytic mechanisms of MetE. Here, we present crystal structures of oxidized and zinc-replete MetE from Streptococcus mutans at the physiological pH. The structures reveal that zinc is mobile in the active center and has the possibility to invert even in the absence of homocysteine. These structures provide evidence for the dynamic equilibrium model. Crystal Structures of Cobalamin-Independent Methionine Synthase (MetE) from Streptococcus mutans: A Dynamic Zinc-Inversion Model.,Fu TM, Almqvist J, Liang YH, Li L, Huang Y, Su XD J Mol Biol. 2011 Sep 30;412(4):688-97. Epub 2011 Aug 5. PMID:21840320[1] From MEDLINE®/PubMed®, a database of the U.S. National Library of Medicine. References
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