View source for 1wq7


==Crystal Structure Of Biotin-(Acetyl-CoA-Carboxylase) ligase From Pyrococcus Horikoshii Ot3==
<StructureSection load='1wq7' size='340' side='right'caption='[[1wq7]], [[Resolution|resolution]] 1.60&Aring;' scene=''>
== Structural highlights ==
<table><tr><td colspan='2'>[[1wq7]] is a 2 chain structure with sequence from [http://en.wikipedia.org/wiki/Pyrococcus_horikoshii Pyrococcus horikoshii]. Full crystallographic information is available from [http://oca.weizmann.ac.il/oca-bin/ocashort?id=1WQ7 OCA]. For a <b>guided tour on the structure components</b> use [http://proteopedia.org/fgij/fg.htm?mol=1WQ7 FirstGlance]. <br>
</td></tr><tr id='related'><td class="sblockLbl"><b>[[Related_structure|Related:]]</b></td><td class="sblockDat"><div style='overflow: auto; max-height: 3em;'>[[1wnl|1wnl]], [[1wpy|1wpy]]</div></td></tr>
<tr id='gene'><td class="sblockLbl"><b>[[Gene|Gene:]]</b></td><td class="sblockDat">birA ([http://www.ncbi.nlm.nih.gov/Taxonomy/Browser/wwwtax.cgi?mode=Info&srchmode=5&id=70601 Pyrococcus horikoshii])</td></tr>
<tr id='activity'><td class="sblockLbl"><b>Activity:</b></td><td class="sblockDat"><span class='plainlinks'>[http://en.wikipedia.org/wiki/Biotin--[acetyl-CoA-carboxylase]_ligase Biotin--[acetyl-CoA-carboxylase] ligase], with EC number [http://www.brenda-enzymes.info/php/result_flat.php4?ecno=6.3.4.15 6.3.4.15] </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=1wq7 FirstGlance], [http://oca.weizmann.ac.il/oca-bin/ocaids?id=1wq7 OCA], [http://pdbe.org/1wq7 PDBe], [http://www.rcsb.org/pdb/explore.do?structureId=1wq7 RCSB], [http://www.ebi.ac.uk/pdbsum/1wq7 PDBsum], [http://prosat.h-its.org/prosat/prosatexe?pdbcode=1wq7 ProSAT], [http://www.topsan.org/Proteins/RSGI/1wq7 TOPSAN]</span></td></tr>
</table>
== Evolutionary Conservation ==
[[Image:Consurf_key_small.gif|200px|right]]
Check<jmol>
  <jmolCheckbox>
    <scriptWhenChecked>; select protein; define ~consurf_to_do selected; consurf_initial_scene = true; script "/wiki/ConSurf/wq/1wq7_consurf.spt"</scriptWhenChecked>
    <scriptWhenUnchecked>script /wiki/extensions/Proteopedia/spt/initialview01.spt</scriptWhenUnchecked>
    <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/main_output.php?pdb_ID=1wq7 ConSurf].
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== Publication Abstract from PubMed ==
Biotin protein ligase (EC 6.3.4.15) catalyses the synthesis of an activated form of biotin, biotinyl-5'-AMP, from substrates biotin and ATP followed by biotinylation of the biotin carboxyl carrier protein subunit of acetyl-CoA carboxylase. The three-dimensional structure of biotin protein ligase from Pyrococcus horikoshii OT3 has been determined by X-ray diffraction at 1.6A resolution. The structure reveals a homodimer as the functional unit. Each subunit contains two domains, a larger N-terminal catalytic domain and a smaller C-terminal domain. The structural feature of the active site has been studied by determination of the crystal structures of complexes of the enzyme with biotin, ADP and the reaction intermediate biotinyl-5'-AMP at atomic resolution. This is the first report of the liganded structures of biotin protein ligase with nucleotide and biotinyl-5'-AMP. The structures of the unliganded and the liganded forms are isomorphous except for an ordering of the active site loop upon ligand binding. Catalytic binding sites are suitably arranged to minimize the conformational changes required during the reaction, as the pockets for biotin and nucleotide are located spatially adjacent to each other in a cleft of the catalytic domain and the pocket for biotinyl-5'-AMP binding mimics the combination of those of the substrates. The exact locations of the ligands and the active site residues allow us to propose a general scheme for the first step of the reaction carried out by biotin protein ligase in which the positively charged epsilon-amino group of Lys111 facilitates the nucleophilic attack on the ATP alpha-phosphate group by the biotin carboxyl oxygen atom and stabilizes the negatively charged intermediates.

Crystal structures of biotin protein ligase from Pyrococcus horikoshii OT3 and its complexes: structural basis of biotin activation.,Bagautdinov B, Kuroishi C, Sugahara M, Kunishima N J Mol Biol. 2005 Oct 21;353(2):322-33. PMID:16169557<ref>PMID:16169557</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 1wq7" style="background-color:#fffaf0;"></div>

==See Also==
*[[Biotin Protein Ligase 3D structures|Biotin Protein Ligase 3D structures]]
== References ==
<references/>
__TOC__
</StructureSection>
[[Category: Large Structures]]
[[Category: Pyrococcus horikoshii]]
[[Category: Bagautdinov, B]]
[[Category: Kunishima, N]]
[[Category: Structural genomic]]
[[Category: Biotin biosynthesis]]
[[Category: Dimer]]
[[Category: Ligase]]
[[Category: Rsgi]]