View source for 2jku


==Crystal structure of the N-terminal region of the biotin acceptor domain of human propionyl-CoA carboxylase==
<StructureSection load='2jku' size='340' side='right'caption='[[2jku]], [[Resolution|resolution]] 1.50&Aring;' scene=''>
== Structural highlights ==
<table><tr><td colspan='2'>[[2jku]] is a 1 chain structure with sequence from [https://en.wikipedia.org/wiki/Human Human]. Full crystallographic information is available from [http://oca.weizmann.ac.il/oca-bin/ocashort?id=2JKU OCA]. For a <b>guided tour on the structure components</b> use [https://proteopedia.org/fgij/fg.htm?mol=2JKU FirstGlance]. <br>
</td></tr><tr id='ligand'><td class="sblockLbl"><b>[[Ligand|Ligands:]]</b></td><td class="sblockDat" id="ligandDat"><scene name='pdbligand=PG4:TETRAETHYLENE+GLYCOL'>PG4</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;'>[[2cqy|2cqy]]</div></td></tr>
<tr id='activity'><td class="sblockLbl"><b>Activity:</b></td><td class="sblockDat"><span class='plainlinks'>[https://en.wikipedia.org/wiki/Propionyl-CoA_carboxylase Propionyl-CoA carboxylase], with EC number [https://www.brenda-enzymes.info/php/result_flat.php4?ecno=6.4.1.3 6.4.1.3] </span></td></tr>
<tr id='resources'><td class="sblockLbl"><b>Resources:</b></td><td class="sblockDat"><span class='plainlinks'>[https://proteopedia.org/fgij/fg.htm?mol=2jku FirstGlance], [http://oca.weizmann.ac.il/oca-bin/ocaids?id=2jku OCA], [https://pdbe.org/2jku PDBe], [https://www.rcsb.org/pdb/explore.do?structureId=2jku RCSB], [https://www.ebi.ac.uk/pdbsum/2jku PDBsum], [https://prosat.h-its.org/prosat/prosatexe?pdbcode=2jku ProSAT]</span></td></tr>
</table>
== Disease ==
[[https://www.uniprot.org/uniprot/PCCA_HUMAN PCCA_HUMAN]] Defects in PCCA are the cause of propionic acidemia type I (PA-1) [MIM:[https://omim.org/entry/606054 606054]]. PA-1 is a life-threatening disease characterized by episodic vomiting, lethargy and ketosis, neutropenia, periodic thrombocytopenia, hypogammaglobulinemia, developmental retardation, and intolerance to protein.<ref>PMID:10101253</ref> <ref>PMID:12559849</ref> <ref>PMID:15059621</ref> <ref>PMID:10329019</ref>  
== 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/jk/2jku_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=2jku ConSurf].
<div style="clear:both"></div>
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== Publication Abstract from PubMed ==
Holocarboxylase synthetase (HCS, human) and BirA (Escherichia coli) are biotin protein ligases that catalyze the ATP-dependent attachment of biotin to apocarboxylases. Biotin attachment occurs on a highly conserved lysine residue within a consensus sequence (Ala/Val-Met-Lys-Met) that is found in carboxylases in most organisms. Numerous studies have indicated that HCS and BirA, as well as biotin protein ligases from other organisms, can attach biotin to apocarboxylases from different organisms, indicating that the mechanism of biotin attachment is well conserved. In this study, we examined the cross-reactivity of biotin attachment between human and bacterial biotin ligases by comparing biotinylation of p-67 and BCCP87, the biotin-attachment domain fragments from human propionyl-CoA carboxylase and E. coli acetyl-CoA carboxylase, respectively. While BirA has similar biotinylation activity toward the two substrates, HCS has reduced activity toward bacterial BCCP87 relative to its native substrate, p-67. The crystal structure of a digested form of p-67, spanning a sequence that contains a seven-residue protruding thumb loop in BCCP87, revealed the absence of a similar structure in the human peptide. Significantly, an engineered "thumbless" bacterial BCCP87 could be biotinylated by HCS, with substrate affinity restored to near normal. This study suggests that the thumb loop found in bacterial carboxylases interferes with optimal interaction with the mammalian biotin protein ligase. While the function of the thumb loop remains unknown, these results indicate a constraint on specificity of the bacterial substrate for biotin attachment that is not itself a feature of BirA.

Structural Impact of Human and Escherichia coli Biotin Carboxyl Carrier Proteins on Biotin Attachment.,Healy S, McDonald MK, Wu X, Yue WW, Kochan G, Oppermann U, Gravel RA Biochemistry. 2010 May 12. PMID:20443544<ref>PMID:20443544</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 2jku" style="background-color:#fffaf0;"></div>
== References ==
<references/>
__TOC__
</StructureSection>
[[Category: Human]]
[[Category: Large Structures]]
[[Category: Propionyl-CoA carboxylase]]
[[Category: Arrowsmith, C]]
[[Category: Bountra, C]]
[[Category: Delft, F von]]
[[Category: Edwards, A]]
[[Category: Filippakopoulos, P]]
[[Category: Gravel, R A]]
[[Category: Healy, S]]
[[Category: Kochan, G]]
[[Category: Murray, J W]]
[[Category: Oppermann, U]]
[[Category: Pilka, E S]]
[[Category: Roos, A K]]
[[Category: Wikstrom, M]]
[[Category: Yue, W W]]
[[Category: Atp-binding]]
[[Category: Biotin]]
[[Category: Disease mutation]]
[[Category: Ligase]]
[[Category: Mitochondrion]]
[[Category: Nucleotide-binding]]
[[Category: Phosphoprotein]]
[[Category: Transit peptide]]