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4ztx

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==Neurospora crassa cobalamin-independent methionine synthase complexed with Zn2+==
==Neurospora crassa cobalamin-independent methionine synthase complexed with Zn2+==
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<StructureSection load='4ztx' size='340' side='right' caption='[[4ztx]], [[Resolution|resolution]] 2.10&Aring;' scene=''>
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<StructureSection load='4ztx' size='340' side='right'caption='[[4ztx]], [[Resolution|resolution]] 2.10&Aring;' scene=''>
== Structural highlights ==
== Structural highlights ==
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<table><tr><td colspan='2'>[[4ztx]] is a 1 chain structure with sequence from [http://en.wikipedia.org/wiki/Neurospora_crassa Neurospora crassa]. Full crystallographic information is available from [http://oca.weizmann.ac.il/oca-bin/ocashort?id=4ZTX OCA]. For a <b>guided tour on the structure components</b> use [http://oca.weizmann.ac.il/oca-docs/fgij/fg.htm?mol=4ZTX FirstGlance]. <br>
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<table><tr><td colspan='2'>[[4ztx]] is a 1 chain structure with sequence from [https://en.wikipedia.org/wiki/Neurospora_crassa Neurospora crassa]. Full crystallographic information is available from [http://oca.weizmann.ac.il/oca-bin/ocashort?id=4ZTX OCA]. For a <b>guided tour on the structure components</b> use [https://proteopedia.org/fgij/fg.htm?mol=4ZTX FirstGlance]. <br>
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</td></tr><tr id='ligand'><td class="sblockLbl"><b>[[Ligand|Ligands:]]</b></td><td class="sblockDat"><scene name='pdbligand=GOL:GLYCEROL'>GOL</scene>, <scene name='pdbligand=NO3:NITRATE+ION'>NO3</scene>, <scene name='pdbligand=ZN:ZINC+ION'>ZN</scene></td></tr>
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</td></tr><tr id='method'><td class="sblockLbl"><b>[[Empirical_models|Method:]]</b></td><td class="sblockDat" id="methodDat">X-ray diffraction, [[Resolution|Resolution]] 2.1&#8491;</td></tr>
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<tr id='related'><td class="sblockLbl"><b>[[Related_structure|Related:]]</b></td><td class="sblockDat">[[4zty|4zty]]</td></tr>
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<tr id='ligand'><td class="sblockLbl"><b>[[Ligand|Ligands:]]</b></td><td class="sblockDat" id="ligandDat"><scene name='pdbligand=GOL:GLYCEROL'>GOL</scene>, <scene name='pdbligand=NO3:NITRATE+ION'>NO3</scene>, <scene name='pdbligand=ZN:ZINC+ION'>ZN</scene></td></tr>
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<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>
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<tr id='resources'><td class="sblockLbl"><b>Resources:</b></td><td class="sblockDat"><span class='plainlinks'>[https://proteopedia.org/fgij/fg.htm?mol=4ztx FirstGlance], [http://oca.weizmann.ac.il/oca-bin/ocaids?id=4ztx OCA], [https://pdbe.org/4ztx PDBe], [https://www.rcsb.org/pdb/explore.do?structureId=4ztx RCSB], [https://www.ebi.ac.uk/pdbsum/4ztx PDBsum], [https://prosat.h-its.org/prosat/prosatexe?pdbcode=4ztx ProSAT]</span></td></tr>
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<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=4ztx FirstGlance], [http://oca.weizmann.ac.il/oca-bin/ocaids?id=4ztx OCA], [http://pdbe.org/4ztx PDBe], [http://www.rcsb.org/pdb/explore.do?structureId=4ztx RCSB], [http://www.ebi.ac.uk/pdbsum/4ztx PDBsum], [http://prosat.h-its.org/prosat/prosatexe?pdbcode=4ztx ProSAT]</span></td></tr>
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</table>
</table>
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<div style="background-color:#fffaf0;">
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== Function ==
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== Publication Abstract from PubMed ==
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[https://www.uniprot.org/uniprot/Q8X1E4_NEUCS Q8X1E4_NEUCS]
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Two families of methionine synthases, distinct in catalytic and structural features, have been encountered: MetH, the cobalamin-dependent enzyme and MetE, the cobalamin-independent form. The MetE family is of mechanistic interest due to the chemically challenging nature of the reaction and is a potential target for antifungal therapeutics since the human genome encodes only MetH. Here we report the identification, purification, and crystal structure of MetE from the filamentous fungus Neurospora crassa (ncMetE). ncMetE was highly thermostable and crystallized readily, making it ideal for study. Crystal structures of native ncMetE in complex with either Zn2+or Cd2+ were solved at resolution limits of 2.10 A and 1.88 A, respectively. The monomeric protein contains two domains, each containing a (betaalpha)8 barrel core, and a long alpha-helical segment spans the length of the protein, connecting the domains. Zn2+ bound in the C-terminal domain exhibits tetrahedral coordination with the side chains of His 652, Cys 654, Glu 676 and Cys 737. A Cd2+ replete structure revealed a supermetalated enzyme and demonstrated the inate flexibility of the metal binding site. An extensive analysis of sequence conservation within the MetE family identified 57 highly conserved residues and 60 additional residues that were conserved in all fungal sequences examined.
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Fungal cobalamin-independent methionine synthase: Insights from the model organism, Neurospora crassa.,Wheatley RW, Ng KK, Kapoor M Arch Biochem Biophys. 2015 Nov 30;590:125-137. doi: 10.1016/j.abb.2015.11.037. PMID:26657067<ref>PMID:26657067</ref>
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==See Also==
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*[[Methionine synthase 3D structures|Methionine synthase 3D structures]]
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From MEDLINE&reg;/PubMed&reg;, a database of the U.S. National Library of Medicine.<br>
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</div>
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<div class="pdbe-citations 4ztx" style="background-color:#fffaf0;"></div>
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== References ==
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<references/>
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__TOC__
__TOC__
</StructureSection>
</StructureSection>
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[[Category: 5-methyltetrahydropteroyltriglutamate--homocysteine S-methyltransferase]]
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[[Category: Large Structures]]
[[Category: Neurospora crassa]]
[[Category: Neurospora crassa]]
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[[Category: Kapoor, M]]
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[[Category: Kapoor M]]
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[[Category: Ng, K K]]
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[[Category: Ng KK]]
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[[Category: Wheatley, R W]]
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[[Category: Wheatley RW]]
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[[Category: Homocysteine]]
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[[Category: Methionine synthesis]]
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[[Category: Methyltetrahydrofolate]]
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[[Category: Methyltransferase]]
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[[Category: Transferase]]
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Current revision

Neurospora crassa cobalamin-independent methionine synthase complexed with Zn2+

PDB ID 4ztx

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