1bxt

<table><tr><td colspan='2'>[[1bxt]] is a 2 chain structure with sequence from [https://en.wikipedia.org/wiki/"micrococcus_scarlatinae"_klein_1884 "micrococcus scarlatinae" klein 1884]. Full crystallographic information is available from [http://oca.weizmann.ac.il/oca-bin/ocashort?id=1BXT OCA]. For a <b>guided tour on the structure components</b> use [https://proteopedia.org/fgij/fg.htm?mol=1BXT FirstGlance]. <br>

</td></tr><tr id='resources'><td class="sblockLbl"><b>Resources:</b></td><td class="sblockDat"><span class='plainlinks'>[https://proteopedia.org/fgij/fg.htm?mol=1bxt FirstGlance], [http://oca.weizmann.ac.il/oca-bin/ocaids?id=1bxt OCA], [https://pdbe.org/1bxt PDBe], [https://www.rcsb.org/pdb/explore.do?structureId=1bxt RCSB], [https://www.ebi.ac.uk/pdbsum/1bxt PDBsum], [https://prosat.h-its.org/prosat/prosatexe?pdbcode=1bxt ProSAT]</span></td></tr>

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== Publication Abstract from PubMed ==

Streptococcal superantigen (SSA) is a 28,000 Mr toxin originally isolated from a pathogenic strain of Streptococcus pyogenes that has 60% sequence identity with staphylococcal enterotoxin B (SEB). SSA and SEB, however, do not compete for binding on the surfaces of cells expressing MHC class II molecules. This behavior had been ascribed to SSA and SEB binding to distinct sites on, or different subsets of, HLA-DR molecules. Here we demonstrate that SSA binds predominantly to HLA-DQ, rather than to HLA-DR molecules, and present the crystal structure of SSA at 1.85 A resolution. These data provide a structural basis for interpreting the interaction of SSA with HLA-DQ molecules as well as a foundation for understanding bacterial superantigen affinities for distinct MHC isotypes.

Structural basis for HLA-DQ binding by the streptococcal superantigen SSA.,Sundberg E, Jardetzky TS Nat Struct Biol. 1999 Feb;6(2):123-9. PMID:10048922<ref>PMID:10048922</ref>

From MEDLINE&reg;/PubMed&reg;, a database of the U.S. National Library of Medicine.<br>

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== References ==

<references/>

[[Category: Micrococcus scarlatinae klein 1884]]

[[Category: Jardetzky, T]]

[[Category: Mhc class ii interaction]]

[[Category: T cell activation]]

[[Category: Toxic shock-like syndrome]]