1yn5: Difference between revisions
New page: left|200px<br /><applet load="1yn5" size="450" color="white" frame="true" align="right" spinBox="true" caption="1yn5, resolution 2.20Å" /> '''Crystal Structures o... |
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[[Image:1yn5.gif|left|200px]]<br /><applet load="1yn5" size=" | [[Image:1yn5.gif|left|200px]]<br /><applet load="1yn5" size="350" color="white" frame="true" align="right" spinBox="true" | ||
caption="1yn5, resolution 2.20Å" /> | caption="1yn5, resolution 2.20Å" /> | ||
'''Crystal Structures of EAP Domains from Staphylococcus aureus Reveal an Unexpected Homology to Bacterial Superantigens'''<br /> | '''Crystal Structures of EAP Domains from Staphylococcus aureus Reveal an Unexpected Homology to Bacterial Superantigens'''<br /> | ||
==Overview== | ==Overview== | ||
The Eap (extracellular adherence protein) of Staphylococcus aureus | The Eap (extracellular adherence protein) of Staphylococcus aureus functions as a secreted virulence factor by mediating interactions between the bacterial cell surface and several extracellular host proteins. Eap proteins from different Staphylococcal strains consist of four to six tandem repeats of a structurally uncharacterized domain (EAP domain). We have determined the three-dimensional structures of three different EAP domains to 1.8, 2.2, and 1.35 A resolution, respectively. These structures reveal a core fold that is comprised of an alpha-helix lying diagonally across a five-stranded, mixed beta-sheet. Comparison of EAP domains with known structures reveals an unexpected homology with the C-terminal domain of bacterial superantigens. Examination of the structure of the superantigen SEC2 bound to the beta-chain of a T-cell receptor suggests a possible ligand-binding site within the EAP domain (Fields, B. A., Malchiodi, E. L., Li, H., Ysern, X., Stauffacher, C. V., Schlievert, P. M., Karjalainen, K., and Mariuzza, R. (1996) Nature 384, 188-192). These results provide the first structural characterization of EAP domains, relate EAP domains to a large class of bacterial toxins, and will guide the design of future experiments to analyze EAP domain structure/function relationships. | ||
==About this Structure== | ==About this Structure== | ||
1YN5 is a [http://en.wikipedia.org/wiki/Single_protein Single protein] structure of sequence from [http://en.wikipedia.org/wiki/Staphylococcus_aureus Staphylococcus aureus]. Full crystallographic information is available from [http:// | 1YN5 is a [http://en.wikipedia.org/wiki/Single_protein Single protein] structure of sequence from [http://en.wikipedia.org/wiki/Staphylococcus_aureus Staphylococcus aureus]. Full crystallographic information is available from [http://oca.weizmann.ac.il/oca-bin/ocashort?id=1YN5 OCA]. | ||
==Reference== | ==Reference== | ||
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[[Category: Single protein]] | [[Category: Single protein]] | ||
[[Category: Staphylococcus aureus]] | [[Category: Staphylococcus aureus]] | ||
[[Category: Geisbrecht, B | [[Category: Geisbrecht, B V.]] | ||
[[Category: Hamaoka, B | [[Category: Hamaoka, B Y.]] | ||
[[Category: Leahy, D | [[Category: Leahy, D J.]] | ||
[[Category: Perman, B.]] | [[Category: Perman, B.]] | ||
[[Category: Zemla, A.]] | [[Category: Zemla, A.]] | ||
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[[Category: virulence factor]] | [[Category: virulence factor]] | ||
''Page seeded by [http:// | ''Page seeded by [http://oca.weizmann.ac.il/oca OCA ] on Thu Feb 21 16:07:03 2008'' |
Revision as of 17:07, 21 February 2008
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Crystal Structures of EAP Domains from Staphylococcus aureus Reveal an Unexpected Homology to Bacterial Superantigens
OverviewOverview
The Eap (extracellular adherence protein) of Staphylococcus aureus functions as a secreted virulence factor by mediating interactions between the bacterial cell surface and several extracellular host proteins. Eap proteins from different Staphylococcal strains consist of four to six tandem repeats of a structurally uncharacterized domain (EAP domain). We have determined the three-dimensional structures of three different EAP domains to 1.8, 2.2, and 1.35 A resolution, respectively. These structures reveal a core fold that is comprised of an alpha-helix lying diagonally across a five-stranded, mixed beta-sheet. Comparison of EAP domains with known structures reveals an unexpected homology with the C-terminal domain of bacterial superantigens. Examination of the structure of the superantigen SEC2 bound to the beta-chain of a T-cell receptor suggests a possible ligand-binding site within the EAP domain (Fields, B. A., Malchiodi, E. L., Li, H., Ysern, X., Stauffacher, C. V., Schlievert, P. M., Karjalainen, K., and Mariuzza, R. (1996) Nature 384, 188-192). These results provide the first structural characterization of EAP domains, relate EAP domains to a large class of bacterial toxins, and will guide the design of future experiments to analyze EAP domain structure/function relationships.
About this StructureAbout this Structure
1YN5 is a Single protein structure of sequence from Staphylococcus aureus. Full crystallographic information is available from OCA.
ReferenceReference
The crystal structures of EAP domains from Staphylococcus aureus reveal an unexpected homology to bacterial superantigens., Geisbrecht BV, Hamaoka BY, Perman B, Zemla A, Leahy DJ, J Biol Chem. 2005 Apr 29;280(17):17243-50. Epub 2005 Feb 3. PMID:15691839
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