1yrt

<table><tr><td colspan='2'>[[1yrt]] is a 2 chain structure with sequence from [http://en.wikipedia.org/wiki/"bacterium_tussis-convulsivae"_lehmann_and_neumann_1927 "bacterium tussis-convulsivae" lehmann and neumann 1927] and [http://en.wikipedia.org/wiki/Human Human]. Full crystallographic information is available from [http://oca.weizmann.ac.il/oca-bin/ocashort?id=1YRT OCA]. For a <b>guided tour on the structure components</b> use [http://proteopedia.org/fgij/fg.htm?mol=1YRT FirstGlance]. <br>

</td></tr><tr id='ligand'><td class="sblockLbl"><b>[[Ligand|Ligands:]]</b></td><td class="sblockDat" id="ligandDat"><scene name='pdbligand=CA:CALCIUM+ION'>CA</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;'>[[1yru|1yru]]</div></td></tr>

<tr id='gene'><td class="sblockLbl"><b>[[Gene|Gene:]]</b></td><td class="sblockDat">cya, cyaA ([http://www.ncbi.nlm.nih.gov/Taxonomy/Browser/wwwtax.cgi?mode=Info&srchmode=5&id=520 "Bacterium tussis-convulsivae" Lehmann and Neumann 1927]), CALM1, CALM2, CALM3 ([http://www.ncbi.nlm.nih.gov/Taxonomy/Browser/wwwtax.cgi?mode=Info&srchmode=5&id=9606 HUMAN])</td></tr>

<tr id='activity'><td class="sblockLbl"><b>Activity:</b></td><td class="sblockDat"><span class='plainlinks'>[http://en.wikipedia.org/wiki/Adenylate_cyclase Adenylate cyclase], with EC number [http://www.brenda-enzymes.info/php/result_flat.php4?ecno=4.6.1.1 4.6.1.1] </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=1yrt FirstGlance], [http://oca.weizmann.ac.il/oca-bin/ocaids?id=1yrt OCA], [http://pdbe.org/1yrt PDBe], [http://www.rcsb.org/pdb/explore.do?structureId=1yrt RCSB], [http://www.ebi.ac.uk/pdbsum/1yrt PDBsum], [http://prosat.h-its.org/prosat/prosatexe?pdbcode=1yrt ProSAT]</span></td></tr>

[[http://www.uniprot.org/uniprot/CYAA_BORPE CYAA_BORPE]] This adenylate cyclase belongs to a special class of bacterial toxin. It causes whooping cough by acting on mammalian cells by elevating cAMP-concentration and thus disrupts normal cell function.

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== Publication Abstract from PubMed ==

CyaA is crucial for colonization by Bordetella pertussis, the etiologic agent of whooping cough. Here we report crystal structures of the adenylyl cyclase domain (ACD) of CyaA with the C-terminal domain of calmodulin. Four discrete regions of CyaA bind calcium-loaded calmodulin with a large buried contact surface. Of those, a tryptophan residue (W242) at an alpha-helix of CyaA makes extensive contacts with the calcium-induced, hydrophobic pocket of calmodulin. Mutagenic analyses show that all four regions of CyaA contribute to calmodulin binding and the calmodulin-induced conformational change of CyaA is crucial for catalytic activation. A crystal structure of CyaA-calmodulin with adefovir diphosphate, the metabolite of an approved antiviral drug, reveals the location of catalytic site of CyaA and how adefovir diphosphate tightly binds CyaA. The ACD of CyaA shares a similar structure and mechanism of activation with anthrax edema factor (EF). However, the interactions of CyaA with calmodulin completely diverge from those of EF. This provides molecular details of how two structurally homologous bacterial toxins evolved divergently to bind calmodulin, an evolutionarily conserved calcium sensor.

Structural basis for the interaction of Bordetella pertussis adenylyl cyclase toxin with calmodulin.,Guo Q, Shen Y, Lee YS, Gibbs CS, Mrksich M, Tang WJ EMBO J. 2005 Sep 21;24(18):3190-201. Epub 2005 Sep 1. PMID:16138079<ref>PMID:16138079</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 1yrt" style="background-color:#fffaf0;"></div>

== References ==

<references/>

[[Category: Bacterium tussis-convulsivae lehmann and neumann 1927]]

[[Category: Adenylate cyclase]]

[[Category: Human]]

[[Category: Gibbs, C S]]

[[Category: Guo, Q]]

[[Category: Lee, Y S]]

[[Category: Mrksich, M]]

[[Category: Shen, Y]]

[[Category: Tang, W J]]

[[Category: Toxin]]