1f7l: Difference between revisions
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==HOLO-(ACYL CARRIER PROTEIN) SYNTHASE IN COMPLEX WITH COENZYME A AT 1.5A== | ==HOLO-(ACYL CARRIER PROTEIN) SYNTHASE IN COMPLEX WITH COENZYME A AT 1.5A== | ||
<StructureSection load='1f7l' size='340' side='right' caption='[[1f7l]], [[Resolution|resolution]] 1.50Å' scene=''> | <StructureSection load='1f7l' size='340' side='right' caption='[[1f7l]], [[Resolution|resolution]] 1.50Å' scene=''> | ||
== Structural highlights == | == Structural highlights == | ||
<table><tr><td colspan='2'>[[1f7l]] is a 1 chain structure | <table><tr><td colspan='2'>[[1f7l]] is a 1 chain structure. Full crystallographic information is available from [http://oca.weizmann.ac.il/oca-bin/ocashort?id=1F7L OCA]. For a <b>guided tour on the structure components</b> use [http://oca.weizmann.ac.il/oca-docs/fgij/fg.htm?mol=1F7L FirstGlance]. <br> | ||
</td></tr><tr id='ligand'><td class="sblockLbl"><b>[[Ligand|Ligands:]]</b></td><td class="sblockDat"><scene name='pdbligand=CA:CALCIUM+ION'>CA</scene>, <scene name='pdbligand=CL:CHLORIDE+ION'>CL</scene>, <scene name='pdbligand=COA:COENZYME+A'>COA</scene></td></tr> | </td></tr><tr id='ligand'><td class="sblockLbl"><b>[[Ligand|Ligands:]]</b></td><td class="sblockDat"><scene name='pdbligand=CA:CALCIUM+ION'>CA</scene>, <scene name='pdbligand=CL:CHLORIDE+ION'>CL</scene>, <scene name='pdbligand=COA:COENZYME+A'>COA</scene></td></tr> | ||
<tr id='activity'><td class="sblockLbl"><b>Activity:</b></td><td class="sblockDat"><span class='plainlinks'>[http://en.wikipedia.org/wiki/Holo-[acyl-carrier-protein]_synthase Holo-[acyl-carrier-protein] synthase], with EC number [http://www.brenda-enzymes.info/php/result_flat.php4?ecno=2.7.8.7 2.7.8.7] </span></td></tr> | <tr id='activity'><td class="sblockLbl"><b>Activity:</b></td><td class="sblockDat"><span class='plainlinks'>[http://en.wikipedia.org/wiki/Holo-[acyl-carrier-protein]_synthase Holo-[acyl-carrier-protein] synthase], with EC number [http://www.brenda-enzymes.info/php/result_flat.php4?ecno=2.7.8.7 2.7.8.7] </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=1f7l FirstGlance], [http://oca.weizmann.ac.il/oca-bin/ocaids?id=1f7l OCA], [http://pdbe.org/1f7l PDBe], [http://www.rcsb.org/pdb/explore.do?structureId=1f7l RCSB], [http://www.ebi.ac.uk/pdbsum/1f7l 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=1f7l FirstGlance], [http://oca.weizmann.ac.il/oca-bin/ocaids?id=1f7l OCA], [http://pdbe.org/1f7l PDBe], [http://www.rcsb.org/pdb/explore.do?structureId=1f7l RCSB], [http://www.ebi.ac.uk/pdbsum/1f7l PDBsum], [http://prosat.h-its.org/prosat/prosatexe?pdbcode=1f7l ProSAT]</span></td></tr> | ||
</table> | </table> | ||
== Function == | == Function == | ||
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<text>to colour the structure by Evolutionary Conservation</text> | <text>to colour the structure by Evolutionary Conservation</text> | ||
</jmolCheckbox> | </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/ | </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=1f7l ConSurf]. | ||
<div style="clear:both"></div> | <div style="clear:both"></div> | ||
<div style="background-color:#fffaf0;"> | <div style="background-color:#fffaf0;"> | ||
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__TOC__ | __TOC__ | ||
</StructureSection> | </StructureSection> | ||
[[Category: Fritz, C C]] | [[Category: Fritz, C C]] | ||
[[Category: Hixon, J]] | [[Category: Hixon, J]] | ||
Revision as of 06:55, 6 September 2017
HOLO-(ACYL CARRIER PROTEIN) SYNTHASE IN COMPLEX WITH COENZYME A AT 1.5AHOLO-(ACYL CARRIER PROTEIN) SYNTHASE IN COMPLEX WITH COENZYME A AT 1.5A
Structural highlights
Function[ACPS_BACSU] Transfers the 4'-phosphopantetheine moiety from coenzyme A to a Ser of fatty acid acyl-carrier-protein ACP. Also modifies the D-alanyl carrier protein but fails to recognize PCP and AcpK, an acyl carrier protein of secondary metabolism.[1] Evolutionary Conservation Check, as determined by ConSurfDB. You may read the explanation of the method and the full data available from ConSurf. Publication Abstract from PubMedBACKGROUND: Holo-(acyl carrier protein) synthase (AcpS), a member of the phosphopantetheinyl transferase superfamily, plays a crucial role in the functional activation of acyl carrier protein (ACP) in the fatty acid biosynthesis pathway. AcpS catalyzes the attachment of the 4'-phosphopantetheinyl moiety of coenzyme A (CoA) to the sidechain of a conserved serine residue on apo-ACP. RESULTS: We describe here the first crystal structure of a type II ACP from Bacillus subtilis in complex with its activator AcpS at 2.3 A. We also have determined the structures of AcpS alone (at 1.8 A) and AcpS in complex with CoA (at 1.5 A). These structures reveal that AcpS exists as a trimer. A catalytic center is located at each of the solvent-exposed interfaces between AcpS molecules. Site-directed mutagenesis studies confirm the importance of trimer formation in AcpS activity. CONCLUSIONS: The active site in AcpS is only formed when two AcpS molecules dimerize. The addition of a third molecule allows for the formation of two additional active sites and also permits a large hydrophobic surface from each molecule of AcpS to be buried in the trimer. The mutations Ile5-->Arg, Gln113-->Glu and Gln113-->Arg show that AcpS is inactive when unable to form a trimer. The co-crystal structures of AcpS-CoA and AcpS-ACP allow us to propose a catalytic mechanism for this class of 4'-phosphopantetheinyl transferases. Crystal structures of substrate binding to Bacillus subtilis holo-(acyl carrier protein) synthase reveal a novel trimeric arrangement of molecules resulting in three active sites.,Parris KD, Lin L, Tam A, Mathew R, Hixon J, Stahl M, Fritz CC, Seehra J, Somers WS Structure. 2000 Aug 15;8(8):883-95. PMID:10997907[2] From MEDLINE®/PubMed®, a database of the U.S. National Library of Medicine. See AlsoReferences
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