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1acc

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[[Image:1acc.png|left|200px]]
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==ANTHRAX PROTECTIVE ANTIGEN==
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<StructureSection load='1acc' size='340' side='right' caption='[[1acc]], [[Resolution|resolution]] 2.10&Aring;' scene=''>
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== Structural highlights ==
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<table><tr><td colspan='2'>[[1acc]] is a 1 chain structure with sequence from [http://en.wikipedia.org/wiki/Bacillus_anthracis Bacillus anthracis]. The April 2002 RCSB PDB [http://pdb.rcsb.org/pdb/static.do?p=education_discussion/molecule_of_the_month/index.html Molecule of the Month] feature on ''Anthrax Toxin'' by David S. Goodsell is [http://dx.doi.org/10.2210/rcsb_pdb/mom_2002_4 10.2210/rcsb_pdb/mom_2002_4]. Full crystallographic information is available from [http://oca.weizmann.ac.il/oca-bin/ocashort?id=1ACC OCA]. For a <b>guided tour on the structure components</b> use [http://oca.weizmann.ac.il/oca-docs/fgij/fg.htm?mol=1ACC FirstGlance]. <br>
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</td></tr><tr><td class="sblockLbl"><b>[[Ligand|Ligands:]]</b></td><td class="sblockDat"><scene name='pdbligand=CA:CALCIUM+ION'>CA</scene><br>
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<tr><td class="sblockLbl"><b>Resources:</b></td><td class="sblockDat"><span class='plainlinks'>[http://oca.weizmann.ac.il/oca-docs/fgij/fg.htm?mol=1acc FirstGlance], [http://oca.weizmann.ac.il/oca-bin/ocaids?id=1acc OCA], [http://www.rcsb.org/pdb/explore.do?structureId=1acc RCSB], [http://www.ebi.ac.uk/pdbsum/1acc PDBsum]</span></td></tr>
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<table>
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== Evolutionary Conservation ==
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[[Image:Consurf_key_small.gif|200px|right]]
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Check<jmol>
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<jmolCheckbox>
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<scriptWhenChecked>select protein; define ~consurf_to_do selected; consurf_initial_scene = true; script "/wiki/ConSurf/ac/1acc_consurf.spt"</scriptWhenChecked>
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<scriptWhenUnchecked>script /wiki/extensions/Proteopedia/spt/initialview01.spt</scriptWhenUnchecked>
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<text>to colour the structure by Evolutionary Conservation</text>
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</jmolCheckbox>
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</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/chain_selection.php?pdb_ID=2ata ConSurf].
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<div style="clear:both"></div>
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<div style="background-color:#fffaf0;">
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== Publication Abstract from PubMed ==
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Protective antigen (PA) is the central component of the three-part protein toxin secreted by Bacillus anthracis, the organism responsible for anthrax. After proteolytic activation on the host cell surface, PA forms a membrane-inserting heptamer that translocates the toxic enzymes, oedema factor and lethal factor, into the cytosol. PA, which has a relative molecular mass of 83,000 (M(r) 83K), can also translocate heterologous proteins, and is being evaluated for use as a general protein delivery system. Here we report the crystal structure of monomeric PA at 2.1 A resolution and the water-soluble heptamer at 4.5 A resolution. The monomer is organized mainly into antiparallel beta-sheets and has four domains: an amino-terminal domain (domain 1) containing two calcium ions and the cleavage site for activating proteases; a heptamerization domain (domain 2) containing a large flexible loop implicated in membrane insertion; a small domain of unknown function (domain 3); and a carboxy-terminal receptor-binding domain (domain 4). Removal of a 20K amino-terminal fragment from domain 1 allows the assembly of the heptamer, a ring-shaped structure with a negatively charged lumen, and exposes a large hydrophobic surface for binding the toxic enzymes. We propose a model of pH-dependent membrane insertion involving the formation of a porin-like, membrane-spanning beta-barrel.
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{{STRUCTURE_1acc| PDB=1acc | SCENE= }}
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Crystal structure of the anthrax toxin protective antigen.,Petosa C, Collier RJ, Klimpel KR, Leppla SH, Liddington RC Nature. 1997 Feb 27;385(6619):833-8. PMID:9039918<ref>PMID:9039918</ref>
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===ANTHRAX PROTECTIVE ANTIGEN===
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From MEDLINE&reg;/PubMed&reg;, a database of the U.S. National Library of Medicine.<br>
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</div>
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{{ABSTRACT_PUBMED_9039918}}
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==About this Structure==
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[[1acc]] is a 1 chain structure with sequence from [http://en.wikipedia.org/wiki/Bacillus_anthracis Bacillus anthracis]. The April 2002 RCSB PDB [http://pdb.rcsb.org/pdb/static.do?p=education_discussion/molecule_of_the_month/index.html Molecule of the Month] feature on ''Anthrax Toxin'' by David S. Goodsell is [http://dx.doi.org/10.2210/rcsb_pdb/mom_2002_4 10.2210/rcsb_pdb/mom_2002_4]. Full crystallographic information is available from [http://oca.weizmann.ac.il/oca-bin/ocashort?id=1ACC OCA].
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==See Also==
==See Also==
*[[Anthrax protective antigen|Anthrax protective antigen]]
*[[Anthrax protective antigen|Anthrax protective antigen]]
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== References ==
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==Reference==
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<references/>
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<ref group="xtra">PMID:009039918</ref><references group="xtra"/>
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__TOC__
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</StructureSection>
[[Category: Anthrax Toxin]]
[[Category: Anthrax Toxin]]
[[Category: Bacillus anthracis]]
[[Category: Bacillus anthracis]]

Revision as of 08:36, 23 July 2014

ANTHRAX PROTECTIVE ANTIGEN

1acc, resolution 2.10Å

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