1ted

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[[Image:1ted.png|left|200px]]
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==Crystal structure of a type III polyketide synthase PKS18 from Mycobacterium tuberculosis==
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<StructureSection load='1ted' size='340' side='right' caption='[[1ted]], [[Resolution|resolution]] 2.25&Aring;' scene=''>
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== Structural highlights ==
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<table><tr><td colspan='2'>[[1ted]] is a 4 chain structure with sequence from [http://en.wikipedia.org/wiki/Mycobacterium_tuberculosis_h37rv Mycobacterium tuberculosis h37rv]. Full crystallographic information is available from [http://oca.weizmann.ac.il/oca-bin/ocashort?id=1TED OCA]. For a <b>guided tour on the structure components</b> use [http://oca.weizmann.ac.il/oca-docs/fgij/fg.htm?mol=1TED FirstGlance]. <br>
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</td></tr><tr><td class="sblockLbl"><b>[[Ligand|Ligands:]]</b></td><td class="sblockDat"><scene name='pdbligand=MYR:MYRISTIC+ACID'>MYR</scene><br>
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<tr><td class="sblockLbl"><b>[[Related_structure|Related:]]</b></td><td class="sblockDat">[[1tee|1tee]]</td></tr>
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<tr><td class="sblockLbl"><b>[[Gene|Gene:]]</b></td><td class="sblockDat">pks18 ([http://www.ncbi.nlm.nih.gov/Taxonomy/Browser/wwwtax.cgi?mode=Info&srchmode=5&id=83332 Mycobacterium tuberculosis H37Rv])</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/Naringenin-chalcone_synthase Naringenin-chalcone synthase], with EC number [http://www.brenda-enzymes.info/php/result_flat.php4?ecno=2.3.1.74 2.3.1.74] </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=1ted FirstGlance], [http://oca.weizmann.ac.il/oca-bin/ocaids?id=1ted OCA], [http://www.rcsb.org/pdb/explore.do?structureId=1ted RCSB], [http://www.ebi.ac.uk/pdbsum/1ted 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/te/1ted_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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The superfamily of plant and bacterial type III polyketide synthases (PKSs) produces diverse metabolites with distinct biological functions. PKS18, a type III PKS from Mycobacterium tuberculosis, displays an unusual broad specificity for aliphatic long-chain acyl-coenzyme A (acyl-CoA) starter units (C(6)-C(20)) to produce tri- and tetraketide pyrones. The crystal structure of PKS18 reveals a 20 A substrate binding tunnel, hitherto unidentified in this superfamily of enzymes. This remarkable tunnel extends from the active site to the surface of the protein and is primarily generated by subtle changes of backbone dihedral angles in the core of the protein. Mutagenic studies combined with structure determination provide molecular insights into the structural elements that contribute to the chain length specificity of the enzyme. This first bacterial type III PKS structure underlines a fascinating example of the way in which subtle changes in protein architecture can generate metabolite diversity in nature.
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{{STRUCTURE_1ted| PDB=1ted | SCENE= }}
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A novel tunnel in mycobacterial type III polyketide synthase reveals the structural basis for generating diverse metabolites.,Sankaranarayanan R, Saxena P, Marathe UB, Gokhale RS, Shanmugam VM, Rukmini R Nat Struct Mol Biol. 2004 Sep;11(9):894-900. Epub 2004 Aug 1. PMID:15286723<ref>PMID:15286723</ref>
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===Crystal structure of a type III polyketide synthase PKS18 from Mycobacterium tuberculosis===
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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_15286723}}
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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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[[1ted]] is a 4 chain structure with sequence from [http://en.wikipedia.org/wiki/Mycobacterium_tuberculosis_h37rv Mycobacterium tuberculosis h37rv]. Full crystallographic information is available from [http://oca.weizmann.ac.il/oca-bin/ocashort?id=1TED OCA].
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</StructureSection>
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==Reference==
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<ref group="xtra">PMID:015286723</ref><ref group="xtra">PMID:015039574</ref><references group="xtra"/>
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[[Category: Mycobacterium tuberculosis h37rv]]
[[Category: Mycobacterium tuberculosis h37rv]]
[[Category: Naringenin-chalcone synthase]]
[[Category: Naringenin-chalcone synthase]]

Revision as of 20:19, 29 September 2014

Crystal structure of a type III polyketide synthase PKS18 from Mycobacterium tuberculosis

1ted, resolution 2.25Å

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