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[[Image:1tzn.gif|left|200px]]


{{Structure
==Crystal Structure of the Anthrax Toxin Protective Antigen Heptameric Prepore bound to the VWA domain of CMG2, an anthrax toxin receptor==
|PDB= 1tzn |SIZE=350|CAPTION= <scene name='initialview01'>1tzn</scene>, resolution 4.30&Aring;
<StructureSection load='1tzn' size='340' side='right'caption='[[1tzn]], [[Resolution|resolution]] 4.30&Aring;' scene=''>
|SITE=  
== Structural highlights ==
|LIGAND= <scene name='pdbligand=CA:CALCIUM+ION'>CA</scene>, <scene name='pdbligand=MG:MAGNESIUM+ION'>MG</scene>
<table><tr><td colspan='2'>[[1tzn]] is a 28 chain structure with sequence from [https://en.wikipedia.org/wiki/Bacillus_anthracis_str._A2012 Bacillus anthracis str. A2012] and [https://en.wikipedia.org/wiki/Homo_sapiens Homo sapiens]. Full crystallographic information is available from [http://oca.weizmann.ac.il/oca-bin/ocashort?id=1TZN OCA]. For a <b>guided tour on the structure components</b> use [https://proteopedia.org/fgij/fg.htm?mol=1TZN FirstGlance]. <br>
|ACTIVITY=
</td></tr><tr id='method'><td class="sblockLbl"><b>[[Empirical_models|Method:]]</b></td><td class="sblockDat" id="methodDat">X-ray diffraction, [[Resolution|Resolution]] 4.3&#8491;</td></tr>
|GENE= pagA ([http://www.ncbi.nlm.nih.gov/Taxonomy/Browser/wwwtax.cgi?mode=Info&srchmode=5&id=1392 Bacillus anthracis]), ANTXR2 ([http://www.ncbi.nlm.nih.gov/Taxonomy/Browser/wwwtax.cgi?mode=Info&srchmode=5&id=9606 Homo sapiens])
<tr id='ligand'><td class="sblockLbl"><b>[[Ligand|Ligands:]]</b></td><td class="sblockDat" id="ligandDat"><scene name='pdbligand=CA:CALCIUM+ION'>CA</scene>, <scene name='pdbligand=MG:MAGNESIUM+ION'>MG</scene></td></tr>
|DOMAIN=
<tr id='resources'><td class="sblockLbl"><b>Resources:</b></td><td class="sblockDat"><span class='plainlinks'>[https://proteopedia.org/fgij/fg.htm?mol=1tzn FirstGlance], [http://oca.weizmann.ac.il/oca-bin/ocaids?id=1tzn OCA], [https://pdbe.org/1tzn PDBe], [https://www.rcsb.org/pdb/explore.do?structureId=1tzn RCSB], [https://www.ebi.ac.uk/pdbsum/1tzn PDBsum], [https://prosat.h-its.org/prosat/prosatexe?pdbcode=1tzn ProSAT]</span></td></tr>
|RELATEDENTRY=[[1sht|1SHT]], [[1tzo|1TZO]]
</table>
|RESOURCES=<span class='plainlinks'>[http://oca.weizmann.ac.il/oca-docs/fgij/fg.htm?mol=1tzn FirstGlance], [http://oca.weizmann.ac.il/oca-bin/ocaids?id=1tzn OCA], [http://www.ebi.ac.uk/pdbsum/1tzn PDBsum], [http://www.rcsb.org/pdb/explore.do?structureId=1tzn RCSB]</span>
== Function ==
}}
[https://www.uniprot.org/uniprot/PAG_BACAN PAG_BACAN] One of the three proteins composing the anthrax toxin, the agent which infects many mammalian species and that may cause death. PA binds to a receptor (ATR) in sensitive eukaryotic cells, thereby facilitating the translocation of the enzymatic toxin components, edema factor and lethal factor, across the target cell membrane. PA associated with LF causes death when injected, PA associated with EF produces edema. PA induces immunity to infection with anthrax.
 
== Evolutionary Conservation ==
'''Crystal Structure of the Anthrax Toxin Protective Antigen Heptameric Prepore bound to the VWA domain of CMG2, an anthrax toxin receptor'''
[[Image:Consurf_key_small.gif|200px|right]]
 
Check<jmol>
 
  <jmolCheckbox>
==Overview==
    <scriptWhenChecked>; select protein; define ~consurf_to_do selected; consurf_initial_scene = true; script "/wiki/ConSurf/tz/1tzn_consurf.spt"</scriptWhenChecked>
After binding to cellular receptors and proteolytic activation, the protective antigen component of anthrax toxin forms a heptameric prepore. The prepore later undergoes pH-dependent conversion to a pore, mediating translocation of the edema and lethal factors to the cytosol. We describe structures of the prepore (3.6 A) and a prepore:receptor complex (4.3 A) that reveal the location of pore-forming loops and an unexpected interaction of the receptor with the pore-forming domain. Lower pH is required for prepore-to-pore conversion in the presence of the receptor, indicating that this interaction regulates pH-dependent pore formation. We present an example of a receptor negatively regulating pH-dependent membrane insertion.
    <scriptWhenUnchecked>script /wiki/extensions/Proteopedia/spt/initialview01.spt</scriptWhenUnchecked>
 
    <text>to colour the structure by Evolutionary Conservation</text>
==Disease==
  </jmolCheckbox>
Known disease associated with this structure: Fibromatosis, juvenile hyaline OMIM:[[http://www.ncbi.nlm.nih.gov/entrez/dispomim.cgi?id=608041 608041]], Hyalinosis, infantile systemic OMIM:[[http://www.ncbi.nlm.nih.gov/entrez/dispomim.cgi?id=608041 608041]]
</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=1tzn ConSurf].
 
<div style="clear:both"></div>
==About this Structure==
__TOC__
1TZN is a [[Protein complex]] structure of sequences from [http://en.wikipedia.org/wiki/Bacillus_anthracis Bacillus anthracis] and [http://en.wikipedia.org/wiki/Homo_sapiens Homo sapiens]. Full crystallographic information is available from [http://oca.weizmann.ac.il/oca-bin/ocashort?id=1TZN OCA].  
</StructureSection>
 
[[Category: Bacillus anthracis str. A2012]]
==Reference==
Structure of heptameric protective antigen bound to an anthrax toxin receptor: a role for receptor in pH-dependent pore formation., Lacy DB, Wigelsworth DJ, Melnyk RA, Harrison SC, Collier RJ, Proc Natl Acad Sci U S A. 2004 Sep 7;101(36):13147-51. Epub 2004 Aug 23. PMID:[http://www.ncbi.nlm.nih.gov/pubmed/15326297 15326297]
[[Category: Bacillus anthracis]]
[[Category: Homo sapiens]]
[[Category: Homo sapiens]]
[[Category: Protein complex]]
[[Category: Large Structures]]
[[Category: Collier, R J.]]
[[Category: Collier RJ]]
[[Category: Lacy, D B.]]
[[Category: Lacy DB]]
[[Category: Melnyk, R A.]]
[[Category: Melnyk RA]]
[[Category: Wigelsworth, D J.]]
[[Category: Wigelsworth DJ]]
[[Category: heptamer]]
 
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