1n8w

<StructureSection load='1n8w' size='340' side='right' caption='[[1n8w]], [[Resolution|resolution]] 2.70&Aring;' scene=''>

<table><tr><td colspan='2'>[[1n8w]] is a 2 chain structure with sequence from [http://en.wikipedia.org/wiki/"bacillus_tuberculosis"_(zopf_1883)_klein_1884 "bacillus tuberculosis" (zopf 1883) klein 1884]. Full crystallographic information is available from [http://oca.weizmann.ac.il/oca-bin/ocashort?id=1N8W OCA]. For a <b>guided tour on the structure components</b> use [http://oca.weizmann.ac.il/oca-docs/fgij/fg.htm?mol=1N8W FirstGlance]. <br>

</td></tr><tr id='ligand'><td class="sblockLbl"><b>[[Ligand|Ligands:]]</b></td><td class="sblockDat"><scene name='pdbligand=COA:COENZYME+A'>COA</scene>, <scene name='pdbligand=GLV:GLYOXYLIC+ACID'>GLV</scene>, <scene name='pdbligand=MG:MAGNESIUM+ION'>MG</scene>, <scene name='pdbligand=MLT:D-MALATE'>MLT</scene>, <scene name='pdbligand=SO4:SULFATE+ION'>SO4</scene></td></tr>

<tr id='activity'><td class="sblockLbl"><b>Activity:</b></td><td class="sblockDat"><span class='plainlinks'>[http://en.wikipedia.org/wiki/Malate_synthase Malate synthase], with EC number [http://www.brenda-enzymes.info/php/result_flat.php4?ecno=2.3.3.9 2.3.3.9] </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=1n8w FirstGlance], [http://oca.weizmann.ac.il/oca-bin/ocaids?id=1n8w OCA], [http://pdbe.org/1n8w PDBe], [http://www.rcsb.org/pdb/explore.do?structureId=1n8w RCSB], [http://www.ebi.ac.uk/pdbsum/1n8w PDBsum], [http://prosat.h-its.org/prosat/prosatexe?pdbcode=1n8w ProSAT]</span></td></tr>

[[http://www.uniprot.org/uniprot/MASZ_MYCTU MASZ_MYCTU]] Involved in the glycolate utilization. Catalyzes the condensation and subsequent hydrolysis of acetyl-coenzyme A (acetyl-CoA) and glyoxylate to form malate and CoA (By similarity).[HAMAP-Rule:MF_00641]

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== Publication Abstract from PubMed ==

Establishment or maintenance of a persistent infection by Mycobacterium tuberculosis requires the glyoxylate pathway. This is a bypass of the tricarboxylic acid cycle in which isocitrate lyase and malate synthase (GlcB) catalyze the net incorporation of carbon during growth of microorganisms on acetate or fatty acids as the primary carbon source. The glcB gene from M. tuberculosis, which encodes malate synthase, was cloned, and GlcB was expressed in Escherichia coli. The influence of media conditions on expression in M. tuberculosis indicated that this enzyme is regulated differentially to isocitrate lyase. Purified GlcB had K(m) values of 57 and 30 microm for its substrates glyoxylate and acetyl coenzyme A, respectively, and was inhibited by bromopyruvate, oxalate, and phosphoenolpyruvate. The GlcB structure was solved to 2.1-A resolution in the presence of glyoxylate and magnesium. We also report the structure of GlcB in complex with the products of the reaction, coenzyme A and malate, solved to 2.7-A resolution. Coenzyme A binds in a bent conformation, and the details of its interactions are described, together with implications on the enzyme mechanism.

 

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== References ==

[[Category: Malate synthase]]

[[Category: Malate]]

[[Category: PSI, Protein structure initiative]]

[[Category: Tbsgc]]