1lt7

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[[Image:1lt7.png|left|200px]]
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==Oxidized Homo sapiens betaine-homocysteine S-methyltransferase in complex with four Sm(III) ions==
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<StructureSection load='1lt7' size='340' side='right' caption='[[1lt7]], [[Resolution|resolution]] 2.15&Aring;' scene=''>
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== Structural highlights ==
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<table><tr><td colspan='2'>[[1lt7]] is a 2 chain structure with sequence from [http://en.wikipedia.org/wiki/Homo_sapiens Homo sapiens]. Full crystallographic information is available from [http://oca.weizmann.ac.il/oca-bin/ocashort?id=1LT7 OCA]. For a <b>guided tour on the structure components</b> use [http://oca.weizmann.ac.il/oca-docs/fgij/fg.htm?mol=1LT7 FirstGlance]. <br>
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</td></tr><tr><td class="sblockLbl"><b>[[Ligand|Ligands:]]</b></td><td class="sblockDat"><scene name='pdbligand=CIT:CITRIC+ACID'>CIT</scene>, <scene name='pdbligand=SM:SAMARIUM+(III)+ION'>SM</scene><br>
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<tr><td class="sblockLbl"><b>[[Related_structure|Related:]]</b></td><td class="sblockDat">[[1lt8|1lt8]]</td></tr>
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<tr><td class="sblockLbl"><b>Activity:</b></td><td class="sblockDat"><span class='plainlinks'>[http://en.wikipedia.org/wiki/Betaine--homocysteine_S-methyltransferase Betaine--homocysteine S-methyltransferase], with EC number [http://www.brenda-enzymes.info/php/result_flat.php4?ecno=2.1.1.5 2.1.1.5] </span></td></tr>
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<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=1lt7 FirstGlance], [http://oca.weizmann.ac.il/oca-bin/ocaids?id=1lt7 OCA], [http://www.rcsb.org/pdb/explore.do?structureId=1lt7 RCSB], [http://www.ebi.ac.uk/pdbsum/1lt7 PDBsum]</span></td></tr>
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<table>
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== Evolutionary Conservation ==
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[[Image:Consurf_key_small.gif|200px|right]]
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Check<jmol>
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<jmolCheckbox>
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<scriptWhenChecked>select protein; define ~consurf_to_do selected; consurf_initial_scene = true; script "/wiki/ConSurf/lt/1lt7_consurf.spt"</scriptWhenChecked>
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<scriptWhenUnchecked>script /wiki/extensions/Proteopedia/spt/initialview01.spt</scriptWhenUnchecked>
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<text>to colour the structure by Evolutionary Conservation</text>
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</jmolCheckbox>
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</jmol>, as determined by [http://consurfdb.tau.ac.il/ ConSurfDB]. You may read the [[Conservation%2C_Evolutionary|explanation]] of the method and the full data available from [http://bental.tau.ac.il/new_ConSurfDB/chain_selection.php?pdb_ID=2ata ConSurf].
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<div style="clear:both"></div>
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<div style="background-color:#fffaf0;">
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== Publication Abstract from PubMed ==
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Betaine-homocysteine methyl transferase (BHMT) catalyzes the synthesis of methionine from betaine and homocysteine (Hcy), utilizing a zinc ion to activate Hcy. BHMT is a key liver enzyme that is important for homocysteine homeostasis. X-ray structures of human BHMT in its oxidized (Zn-free) and reduced (Zn-replete) forms, the latter in complex with the bisubstrate analog, S(delta-carboxybutyl)-L-homocysteine, were determined at resolutions of 2.15 A and 2.05 A. BHMT is a (beta/alpha)(8) barrel that is distorted to construct the substrate and metal binding sites. The zinc binding sequences G-V/L-N-C and G-G-C-C are at the C termini of strands beta6 and beta8. Oxidation to the Cys217-Cys299 disulfide and expulsion of Zn are accompanied by local rearrangements. The structures identify Hcy binding fingerprints and provide a prototype for the homocysteine S-methyltransferase family.
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{{STRUCTURE_1lt7| PDB=1lt7 | SCENE= }}
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Betaine-homocysteine methyltransferase: zinc in a distorted barrel.,Evans JC, Huddler DP, Jiracek J, Castro C, Millian NS, Garrow TA, Ludwig ML Structure. 2002 Sep;10(9):1159-71. PMID:12220488<ref>PMID:12220488</ref>
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===Oxidized Homo sapiens betaine-homocysteine S-methyltransferase in complex with four Sm(III) ions===
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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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{{ABSTRACT_PUBMED_12220488}}
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== References ==
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<references/>
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==About this Structure==
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__TOC__
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[[1lt7]] is a 2 chain structure with sequence from [http://en.wikipedia.org/wiki/Homo_sapiens Homo sapiens]. Full crystallographic information is available from [http://oca.weizmann.ac.il/oca-bin/ocashort?id=1LT7 OCA].
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</StructureSection>
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==Reference==
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<ref group="xtra">PMID:012220488</ref><references group="xtra"/>
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[[Category: Betaine--homocysteine S-methyltransferase]]
[[Category: Betaine--homocysteine S-methyltransferase]]
[[Category: Homo sapiens]]
[[Category: Homo sapiens]]

Revision as of 14:18, 28 September 2014

Oxidized Homo sapiens betaine-homocysteine S-methyltransferase in complex with four Sm(III) ions

1lt7, resolution 2.15Å

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OCA

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