3seb Citations

Crystal structure of microbial superantigen staphylococcal enterotoxin B at 1.5 A resolution: implications for superantigen recognition by MHC class II molecules and T-cell receptors.

J Mol Biol 277 61-79 (1998)
Cited: 92 times
EuropePMC logo PMID: 9514739

Abstract

Staphylococcal enterotoxin B is a member of a family of toxins known as superantigens that activate a large number of T-cells (up to 20%) by cross-linking MHC class II molecules with T-cell receptors in a Vbeta-restricted fashion. The crystal structure of staphylococcal enterotoxin B presented here has been determined at 1.5 A resolution, the highest resolution so far for a superantigen. The final model contains 1948 protein atoms and 177 water molecules and has excellent geometry with root-mean-square (rms) deviation of 0.007 A and 1.73 degrees in bond lengths and bond angles, respectively. The overall fold is similar to that of other microbial superantigens, but as it lacks the zinc-binding site found in other members of this family, such as staphylococcal enterotoxin A, C2 and D, this enterotoxin possesses only one MHC class II binding site. Comparison of the crystal structure of free SEB and in complex with an MHC class II molecule revealed no major changes in the MHC-binding site upon complex formation. However, a number of water molecules found in the free SEB may be displaced in the complex or contribute further to its stability. Detailed analysis of the TcR-binding site of SEB, SEA and SEC2 shows significant differences which may account for the ability of each superantigen to bind specific Vbeta sequences.

Reviews - 3seb mentioned but not cited (4)

  1. Manipulation of Innate and Adaptive Immunity by Staphylococcal Superantigens. Tuffs SW, Haeryfar SMM, McCormick JK. Pathogens 7 E53 (2018)
  2. Biological Toxins as the Potential Tools for Bioterrorism. Janik E, Ceremuga M, Saluk-Bijak J, Bijak M. Int J Mol Sci 20 E1181 (2019)
  3. Potent Neutralization of Staphylococcal Enterotoxin B In Vivo by Antibodies that Block Binding to the T-Cell Receptor. Chen G, Karauzum H, Long H, Carranza D, Holtsberg FW, Howell KA, Abaandou L, Zhang B, Jarvik N, Ye W, Liao GC, Gross ML, Leung DW, Amarasinghe GK, Aman MJ, Sidhu SS. J Mol Biol 431 4354-4367 (2019)
  4. Soluble T cell receptor Vβ domains engineered for high-affinity binding to staphylococcal or streptococcal superantigens. Sharma P, Wang N, Kranz DM. Toxins (Basel) 6 556-574 (2014)

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  14. The natural history of ubiquitin and ubiquitin-related domains. Burroughs AM, Iyer LM, Aravind L. Front Biosci (Landmark Ed) 17 1433-1460 (2012)
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  16. FDA-approved immunosuppressants targeting staphylococcal superantigens: mechanisms and insights. Krakauer T. Immunotargets Ther 6 17-29 (2017)

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