1kqa

<table><tr><td colspan='2'>[[1kqa]] is a 3 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=1KQA OCA]. For a <b>guided tour on the structure components</b> use [http://proteopedia.org/fgij/fg.htm?mol=1KQA FirstGlance]. <br>

</td></tr><tr id='ligand'><td class="sblockLbl"><b>[[Ligand|Ligands:]]</b></td><td class="sblockDat" id="ligandDat"><scene name='pdbligand=COA:COENZYME+A'>COA</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;'>[[1krr|1krr]], [[1kru|1kru]], [[1krv|1krv]]</div></td></tr>

<tr id='gene'><td class="sblockLbl"><b>[[Gene|Gene:]]</b></td><td class="sblockDat">laca ([http://www.ncbi.nlm.nih.gov/Taxonomy/Browser/wwwtax.cgi?mode=Info&srchmode=5&id=562 "Bacillus coli" Migula 1895])</td></tr>

<tr id='activity'><td class="sblockLbl"><b>Activity:</b></td><td class="sblockDat"><span class='plainlinks'>[http://en.wikipedia.org/wiki/Galactoside_O-acetyltransferase Galactoside O-acetyltransferase], with EC number [http://www.brenda-enzymes.info/php/result_flat.php4?ecno=2.3.1.18 2.3.1.18] </span></td></tr>

<tr id='resources'><td class="sblockLbl"><b>Resources:</b></td><td class="sblockDat"><span class='plainlinks'>[http://proteopedia.org/fgij/fg.htm?mol=1kqa FirstGlance], [http://oca.weizmann.ac.il/oca-bin/ocaids?id=1kqa OCA], [http://pdbe.org/1kqa PDBe], [http://www.rcsb.org/pdb/explore.do?structureId=1kqa RCSB], [http://www.ebi.ac.uk/pdbsum/1kqa PDBsum], [http://prosat.h-its.org/prosat/prosatexe?pdbcode=1kqa ProSAT]</span></td></tr>

[[http://www.uniprot.org/uniprot/THGA_ECOLI THGA_ECOLI]] May assist cellular detoxification by acetylating non-metabolizable pyranosides, thereby preventing their reentry into the cell.

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== Publication Abstract from PubMed ==

The galactoside acetyltransferase (thiogalactoside transacetylase) of Escherichia coli (GAT, LacA, EC 2.3.1.18) is a gene product of the classical lac operon. GAT may assist cellular detoxification by acetylating nonmetabolizable pyranosides, thereby preventing their reentry into the cell. The structure of GAT has been solved in binary complexes with acetyl-CoA or CoA and in ternary complexes with CoA and the nonphysiological acceptor substrates isopropyl beta-D-thiogalactoside (IPTG) or p-nitrophenyl beta-D-galactopyranoside (PNPbetaGal). A hydrophobic cleft that binds the thioisopropyl and p-nitrophenyl aglycones of IPTG and PNPbetaGal may discriminate against substrates with hydrophilic substituents at this position, such as lactose, or inducers of the lac operon. An extended loop projecting from the left-handed parallel beta helix domain contributes His115, which is in position to facilitate attack of the C6-hydroxyl group of the substrate on the thioester.

Structure of the lac operon galactoside acetyltransferase.,Wang XG, Olsen LR, Roderick SL Structure. 2002 Apr;10(4):581-8. PMID:11937062<ref>PMID:11937062</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 1kqa" style="background-color:#fffaf0;"></div>

== References ==

<references/>

[[Category: Bacillus coli migula 1895]]

[[Category: Galactoside O-acetyltransferase]]

[[Category: Olsen, L R]]

[[Category: Roderick, S L]]

[[Category: Wang, X G]]

[[Category: Transferase]]