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[[Image:1sht.gif|left|200px]]
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[[Image:1sht.png|left|200px]]


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{{STRUCTURE_1sht|  PDB=1sht  |  SCENE=  }}  
{{STRUCTURE_1sht|  PDB=1sht  |  SCENE=  }}  


'''Crystal Structure of the von Willebrand factor A domain of human capillary morphogenesis protein 2: an anthrax toxin receptor'''
===Crystal Structure of the von Willebrand factor A domain of human capillary morphogenesis protein 2: an anthrax toxin receptor===




==Overview==
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Anthrax toxin is released from Bacillus anthracis as three monomeric proteins, which assemble into toxic complexes at the surface of receptor-bearing host cells. One of the proteins, protective antigen (PA), binds to receptors and orchestrates the delivery of the other two (the lethal and edema factors) into the cytosol. PA has been shown to bind to two cellular receptors: anthrax toxin receptor/tumor endothelial marker 8 and capillary morphogenesis protein 2 (CMG2). Both are type 1 membrane proteins that include an approximately 200-aa extracellular von Willebrand factor A (VWA) domain with a metal ion-dependent adhesion site (MIDAS) motif. The anthrax toxin receptor/tumor endothelial marker 8 and CMG2 VWA domains share approximately 60% amino acid identity and bind PA directly in a metal-dependent manner. Here, we report the crystal structure of the CMG2 VWA domain, with and without its intramolecular disulfide bond, to 1.5 and 1.8 A, respectively. Both structures contain a carboxylate ligand-mimetic bound at the MIDAS and appear as open conformations when compared with the VWA domains from alpha-integrins. The CMG2 structures provide a template to begin probing the high-affinity CMG2-PA interaction (200 pM) and may facilitate understanding of toxin assembly/internalization and the development of new anthrax treatments. The structural data also allow molecular interpretation of known CMG2 VWA domain mutations linked to the genetic disorders, juvenile hyaline fibromatosis, and infantile systemic hyalinosis.
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{{ABSTRACT_PUBMED_15079089}}


==About this Structure==
==About this Structure==
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[[Category: Young, J A.T.]]
[[Category: Young, J A.T.]]
[[Category: Rossman fold]]
[[Category: Rossman fold]]
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''Page seeded by [http://oca.weizmann.ac.il/oca OCA ] on Mon Jul 28 09:11:54 2008''

Revision as of 06:11, 28 July 2008

File:1sht.png

Template:STRUCTURE 1sht

Crystal Structure of the von Willebrand factor A domain of human capillary morphogenesis protein 2: an anthrax toxin receptor

Template:ABSTRACT PUBMED 15079089

About this Structure

1SHT is a Single protein structure of sequence from Homo sapiens. Full crystallographic information is available from OCA.

Reference

Crystal structure of the von Willebrand factor A domain of human capillary morphogenesis protein 2: an anthrax toxin receptor., Lacy DB, Wigelsworth DJ, Scobie HM, Young JA, Collier RJ, Proc Natl Acad Sci U S A. 2004 Apr 27;101(17):6367-72. Epub 2004 Apr 12. PMID:15079089

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