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2hfj
From Proteopedia
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| - | [[Image:2hfj.gif|left|200px]] | ||
| - | + | ==Pikromycin thioesterase with covalent pentaketide affinity label== | |
| - | + | <StructureSection load='2hfj' size='340' side='right'caption='[[2hfj]], [[Resolution|resolution]] 1.95Å' scene=''> | |
| - | + | == Structural highlights == | |
| - | | | + | <table><tr><td colspan='2'>[[2hfj]] is a 2 chain structure with sequence from [https://en.wikipedia.org/wiki/As_4.1526 As 4.1526]. Full crystallographic information is available from [http://oca.weizmann.ac.il/oca-bin/ocashort?id=2HFJ OCA]. For a <b>guided tour on the structure components</b> use [https://proteopedia.org/fgij/fg.htm?mol=2HFJ FirstGlance]. <br> |
| - | | | + | </td></tr><tr id='ligand'><td class="sblockLbl"><b>[[Ligand|Ligands:]]</b></td><td class="sblockDat" id="ligandDat"><scene name='pdbligand=DMS:DIMETHYL+SULFOXIDE'>DMS</scene>, <scene name='pdbligand=MG:MAGNESIUM+ION'>MG</scene>, <scene name='pdbligand=SO4:SULFATE+ION'>SO4</scene>, <scene name='pdbligand=YML:[(3R,4S,5S,7R)-4,8-DIHYDROXY-3,5,7-TRIMETHYL-2-OXOOCTYL]PHOSPHONIC+ACID'>YML</scene></td></tr> |
| - | | | + | <tr id='related'><td class="sblockLbl"><b>[[Related_structure|Related:]]</b></td><td class="sblockDat"><div style='overflow: auto; max-height: 3em;'>[[1mna|1mna]], [[2hfk|2hfk]]</div></td></tr> |
| - | + | <tr id='gene'><td class="sblockLbl"><b>[[Gene|Gene:]]</b></td><td class="sblockDat">pikAIV ([https://www.ncbi.nlm.nih.gov/Taxonomy/Browser/wwwtax.cgi?mode=Info&srchmode=5&id=54571 AS 4.1526])</td></tr> | |
| - | + | <tr id='resources'><td class="sblockLbl"><b>Resources:</b></td><td class="sblockDat"><span class='plainlinks'>[https://proteopedia.org/fgij/fg.htm?mol=2hfj FirstGlance], [http://oca.weizmann.ac.il/oca-bin/ocaids?id=2hfj OCA], [https://pdbe.org/2hfj PDBe], [https://www.rcsb.org/pdb/explore.do?structureId=2hfj RCSB], [https://www.ebi.ac.uk/pdbsum/2hfj PDBsum], [https://prosat.h-its.org/prosat/prosatexe?pdbcode=2hfj ProSAT]</span></td></tr> | |
| - | ''' | + | </table> |
| - | + | == Evolutionary Conservation == | |
| - | + | [[Image:Consurf_key_small.gif|200px|right]] | |
| - | == | + | Check<jmol> |
| + | <jmolCheckbox> | ||
| + | <scriptWhenChecked>; select protein; define ~consurf_to_do selected; consurf_initial_scene = true; script "/wiki/ConSurf/hf/2hfj_consurf.spt"</scriptWhenChecked> | ||
| + | <scriptWhenUnchecked>script /wiki/extensions/Proteopedia/spt/initialview01.spt</scriptWhenUnchecked> | ||
| + | <text>to colour the structure by Evolutionary Conservation</text> | ||
| + | </jmolCheckbox> | ||
| + | </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/main_output.php?pdb_ID=2hfj ConSurf]. | ||
| + | <div style="clear:both"></div> | ||
| + | <div style="background-color:#fffaf0;"> | ||
| + | == Publication Abstract from PubMed == | ||
Polyketides are a class of biologically active microbial and plant-derived metabolites that possess a high degree of structural and functional diversity and include many human therapeutics, among them anti-infective and anti-cancer drugs, growth promoters and anti-parasitic agents. The macrolide antibiotics, characterized by a glycoside-linked macrolactone, constitute an important class of polyketides, including erythromycin and the natural ketolide anti-infective agent pikromycin. Here we describe new mechanistic details of macrolactone ring formation catalyzed by the pikromycin polyketide synthase thioesterase domain from Streptomyces venezuelae. A pentaketide phosphonate mimic of the final pikromycin linear chain-elongation intermediate was synthesized and shown to be an active site affinity label. The crystal structures of the affinity-labeled enzyme and of a 12-membered-ring macrolactone product complex suggest a mechanism for cyclization in which a hydrophilic barrier in the enzyme and structural restraints of the substrate induce a curled conformation to direct macrolactone ring formation. | Polyketides are a class of biologically active microbial and plant-derived metabolites that possess a high degree of structural and functional diversity and include many human therapeutics, among them anti-infective and anti-cancer drugs, growth promoters and anti-parasitic agents. The macrolide antibiotics, characterized by a glycoside-linked macrolactone, constitute an important class of polyketides, including erythromycin and the natural ketolide anti-infective agent pikromycin. Here we describe new mechanistic details of macrolactone ring formation catalyzed by the pikromycin polyketide synthase thioesterase domain from Streptomyces venezuelae. A pentaketide phosphonate mimic of the final pikromycin linear chain-elongation intermediate was synthesized and shown to be an active site affinity label. The crystal structures of the affinity-labeled enzyme and of a 12-membered-ring macrolactone product complex suggest a mechanism for cyclization in which a hydrophilic barrier in the enzyme and structural restraints of the substrate induce a curled conformation to direct macrolactone ring formation. | ||
| - | + | Structural basis for macrolactonization by the pikromycin thioesterase.,Akey DL, Kittendorf JD, Giraldes JW, Fecik RA, Sherman DH, Smith JL Nat Chem Biol. 2006 Oct;2(10):537-42. Epub 2006 Sep 10. PMID:16969372<ref>PMID:16969372</ref> | |
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| - | Structural basis for macrolactonization by the pikromycin thioesterase., Akey DL, Kittendorf JD, Giraldes JW, Fecik RA, Sherman DH, Smith JL | + | |
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| - | + | From MEDLINE®/PubMed®, a database of the U.S. National Library of Medicine.<br> | |
| + | </div> | ||
| + | <div class="pdbe-citations 2hfj" style="background-color:#fffaf0;"></div> | ||
| + | == References == | ||
| + | <references/> | ||
| + | __TOC__ | ||
| + | </StructureSection> | ||
| + | [[Category: As 4 1526]] | ||
| + | [[Category: Large Structures]] | ||
| + | [[Category: Akey, D L]] | ||
| + | [[Category: Fecik, R A]] | ||
| + | [[Category: Giraldes, J W]] | ||
| + | [[Category: Kittendorf, J D]] | ||
| + | [[Category: Sherman, D H]] | ||
| + | [[Category: Smith, J L]] | ||
| + | [[Category: Alpha/beta hydrolase]] | ||
| + | [[Category: Hydrolase]] | ||
| + | [[Category: Thioesterase]] | ||
Current revision
Pikromycin thioesterase with covalent pentaketide affinity label
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