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1u6s

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Revision as of 09:41, 12 October 2017

Crystal Structure of the Complex Between Mycobacterium Tuberculosis Beta-Ketoacyl-Acyl Carrier Protein Synthase III and Lauroyl Coenzyme A

Structural highlights

1u6s is a 2 chain structure with sequence from "bacillus_tuberculosis"_(zopf_1883)_klein_1884 "bacillus tuberculosis" (zopf 1883) klein 1884. Full crystallographic information is available from OCA. For a guided tour on the structure components use FirstGlance.
Ligands:
Related:	1hzp, 1u6e, 1ebl, 1hnj
Gene:	fabH ("Bacillus tuberculosis" (Zopf 1883) Klein 1884)
Activity:	[acyl-carrier-protein_synthase_I Beta-ketoacyl-[acyl-carrier-protein] synthase I], with EC number 2.3.1.41
Resources:	FirstGlance, OCA, PDBe, RCSB, PDBsum, ProSAT

Function

[FABH_MYCTU] Catalyzes the condensation reaction of fatty acid synthesis by the addition to an acyl acceptor of two carbons from malonyl-ACP. Catalyzes the first condensation reaction which initiates fatty acid synthesis and may therefore play a role in governing the total rate of fatty acid production. Possesses both acetoacetyl-ACP synthase and acetyl transacylase activities. Has some substrate specificity for long chain acyl-CoA such as myristoyl-CoA. Does not use acyl-CoA as primer. Its substrate specificity determines the biosynthesis of mycolic acid fatty acid chain, which is characteristic of mycobacterial cell wall.^[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 PubMed

Beta-ketoacyl-acyl carrier protein synthase III (FabH) catalyzes a two step reaction that initiates the pathway of fatty acid biosynthesis in plants and bacteria. In Mycobacterium tuberculosis, FabH catalyzes extension of lauroyl, myristoyl and palmitoyl groups from which cell wall mycolic acids of the bacterium are formed. The first step of the reaction is an acyl group transfer from acyl-coenzyme A to the active-site cysteine of the enzyme; the second step is acyl chain extension by two carbon atoms through Claisen condensation with malonyl-acyl carrier protein. We have previously determined the crystal structure of a type II, dissociated M.tuberculosis FabH, which catalyzes extension of lauroyl, myristoyl and palmitoyl groups. Here we describe the first long-chain Michaelis substrate complex of a FabH, that of lauroyl-coenzyme A with a catalytically disabled Cys-->Ala mutant of M.tuberculosis FabH. An elongated channel extending from the mutated active-site cysteine defines the acyl group binding locus that confers unique acyl substrate specificity on M.tuberculosis FabH. CoA lies in a second channel, bound primarily through interactions of its nucleotide group at the enzyme surface. The apparent weak association of CoA in this complex may play a role in the binding and dissociation of long chain acyl-CoA substrates and products and poses questions pertinent to the mechanism of this enzyme.

Crystal structure of a substrate complex of Mycobacterium tuberculosis beta-ketoacyl-acyl carrier protein synthase III (FabH) with lauroyl-coenzyme A.,Musayev F, Sachdeva S, Scarsdale JN, Reynolds KA, Wright HT J Mol Biol. 2005 Mar 11;346(5):1313-21. Epub 2005 Jan 20. PMID:15713483^[2]

From MEDLINE®/PubMed®, a database of the U.S. National Library of Medicine.

References

↑ Choi KH, Kremer L, Besra GS, Rock CO. Identification and substrate specificity of beta -ketoacyl (acyl carrier protein) synthase III (mtFabH) from Mycobacterium tuberculosis. J Biol Chem. 2000 Sep 8;275(36):28201-7. PMID:10840036 doi:http://dx.doi.org/10.1074/jbc.M003241200
↑ Musayev F, Sachdeva S, Scarsdale JN, Reynolds KA, Wright HT. Crystal structure of a substrate complex of Mycobacterium tuberculosis beta-ketoacyl-acyl carrier protein synthase III (FabH) with lauroyl-coenzyme A. J Mol Biol. 2005 Mar 11;346(5):1313-21. Epub 2005 Jan 20. PMID:15713483 doi:10.1016/j.jmb.2004.12.044

1 Structural highlights
2 Function
3 Evolutionary Conservation
4 Publication Abstract from PubMed
5 References

Proteopedia Page Contributors and Editors (what is this?)

OCA

Retrieved from "http://52.214.119.220/wiki/index.php/1u6s"

@@ Line 1: / Line 1: @@
 ==Crystal Structure of the Complex Between Mycobacterium Tuberculosis Beta-Ketoacyl-Acyl Carrier Protein Synthase III and Lauroyl Coenzyme A==
 <StructureSection load='1u6s' size='340' side='right' caption='[[1u6s]], [[Resolution|resolution]] 2.30&Aring;' scene=''>
@@ Line 7: / Line 8: @@
 <tr id='gene'><td class="sblockLbl"><b>[[Gene|Gene:]]</b></td><td class="sblockDat">fabH ([http://www.ncbi.nlm.nih.gov/Taxonomy/Browser/wwwtax.cgi?mode=Info&srchmode=5&id=1773 "Bacillus tuberculosis" (Zopf 1883) Klein 1884])</td></tr>
 <tr id='activity'><td class="sblockLbl"><b>Activity:</b></td><td class="sblockDat"><span class='plainlinks'>[http://en.wikipedia.org/wiki/Beta-ketoacyl-[acyl-carrier-protein]_synthase_I Beta-ketoacyl-[acyl-carrier-protein] synthase I], with EC number [http://www.brenda-enzymes.info/php/result_flat.php4?ecno=2.3.1.41 2.3.1.41] </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=1u6s FirstGlance], [http://oca.weizmann.ac.il/oca-bin/ocaids?id=1u6s OCA], [http://pdbe.org/1u6s PDBe], [http://www.rcsb.org/pdb/explore.do?structureId=1u6s RCSB], [http://www.ebi.ac.uk/pdbsum/1u6s 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=1u6s FirstGlance], [http://oca.weizmann.ac.il/oca-bin/ocaids?id=1u6s OCA], [http://pdbe.org/1u6s PDBe], [http://www.rcsb.org/pdb/explore.do?structureId=1u6s RCSB], [http://www.ebi.ac.uk/pdbsum/1u6s PDBsum], [http://prosat.h-its.org/prosat/prosatexe?pdbcode=1u6s ProSAT]</span></td></tr>
 </table>
 == Function ==
@@ Line 19: / Line 20: @@
     <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/chain_selection.php?pdb_ID=2ata ConSurf].
+</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=1u6s ConSurf].
 <div style="clear:both"></div>
 <div style="background-color:#fffaf0;">
@@ Line 30: / Line 31: @@
 </div>
 <div class="pdbe-citations 1u6s" style="background-color:#fffaf0;"></div>
-==See Also==
-*[[Acyl carrier protein synthase|Acyl carrier protein synthase]]
 == References ==
 <references/>

1u6s

From Proteopedia

Revision as of 09:41, 12 October 2017

Crystal Structure of the Complex Between Mycobacterium Tuberculosis Beta-Ketoacyl-Acyl Carrier Protein Synthase III and Lauroyl Coenzyme A

Structural highlights

Function

Evolutionary Conservation

Publication Abstract from PubMed

References

Contents

Proteopedia Page Contributors and Editors (what is this?)

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