1q7b

<StructureSection load='1q7b' size='340' side='right' caption='[[1q7b]], [[Resolution|resolution]] 2.05&Aring;' scene=''>

<table><tr><td colspan='2'>[[1q7b]] is a 4 chain structure with sequence from [http://en.wikipedia.org/wiki/"bacillus_coli"_migula_1895 "bacillus coli" migula 1895]. Full crystallographic information is available from [http://oca.weizmann.ac.il/oca-bin/ocashort?id=1Q7B OCA]. For a <b>guided tour on the structure components</b> use [http://oca.weizmann.ac.il/oca-docs/fgij/fg.htm?mol=1Q7B 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=NAP:NADP+NICOTINAMIDE-ADENINE-DINUCLEOTIDE+PHOSPHATE'>NAP</scene></td></tr>

<tr id='related'><td class="sblockLbl"><b>[[Related_structure|Related:]]</b></td><td class="sblockDat">[[1q7c|1q7c]]</td></tr>

<tr id='activity'><td class="sblockLbl"><b>Activity:</b></td><td class="sblockDat"><span class='plainlinks'>[http://en.wikipedia.org/wiki/3-oxoacyl-[acyl-carrier-protein]_reductase 3-oxoacyl-[acyl-carrier-protein] reductase], with EC number [http://www.brenda-enzymes.info/php/result_flat.php4?ecno=1.1.1.100 1.1.1.100] </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=1q7b FirstGlance], [http://oca.weizmann.ac.il/oca-bin/ocaids?id=1q7b OCA], [http://pdbe.org/1q7b PDBe], [http://www.rcsb.org/pdb/explore.do?structureId=1q7b RCSB], [http://www.ebi.ac.uk/pdbsum/1q7b PDBsum]</span></td></tr>

[[http://www.uniprot.org/uniprot/FABG_ECOLI FABG_ECOLI]] Catalyzes the NADPH-dependent reduction of beta-ketoacyl-ACP substrates to beta-hydroxyacyl-ACP products, the first reductive step in the elongation cycle of fatty acid biosynthesis.<ref>PMID:8631920</ref> <ref>PMID:14996818</ref>

<scriptWhenChecked>select protein; define ~consurf_to_do selected; consurf_initial_scene = true; script "/wiki/ConSurf/q7/1q7b_consurf.spt"</scriptWhenChecked>

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== Publication Abstract from PubMed ==

beta-Ketoacyl-acyl carrier protein reductase (FabG) is a key component in the type II fatty acid synthase system. The structures of Escherichia coli FabG and the FabG[Y151F] mutant in binary complexes with NADP(H) reveal that mechanistically important conformational changes accompany cofactor binding. The active site Ser-Tyr-Lys triad is repositioned into a catalytically competent constellation, and a hydrogen bonded network consisting of ribose hydroxyls, the Ser-Tyr-Lys triad, and four water molecules creates a proton wire to replenish the tyrosine proton donated during catalysis. Also, a disordered loop in FabG forms a substructure in the complex that shapes the entrance to the active site. A key observation is that the nicotinamide portion of the cofactor is disordered in the FabG[Y151F].NADP(H) complex, and Tyr151 appears to be necessary for high-affinity cofactor binding. Biochemical data confirm that FabG[Y151F] is defective in NADPH binding. Finally, structural changes consistent with the observed negative cooperativity of FabG are described.

Cofactor-induced conformational rearrangements establish a catalytically competent active site and a proton relay conduit in FabG.,Price AC, Zhang YM, Rock CO, White SW Structure. 2004 Mar;12(3):417-28. PMID:15016358<ref>PMID:15016358</ref>

From MEDLINE&reg;/PubMed&reg;, a database of the U.S. National Library of Medicine.<br>

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<div class="pdbe-citations 1q7b" style="background-color:#fffaf0;"></div>

*[[Beta-ketoacyl-ACP reductase|Beta-ketoacyl-ACP reductase]]

[[Category: Bacillus coli migula 1895]]

[[Category: Price, A C]]

[[Category: Rock, C O]]

[[Category: White, S M]]

[[Category: Zhang, Y M]]

[[Category: Crystal structure]]

[[Category: Oxoacyl reductase]]