Download MendeleyStructural engineering of pMHC reagents for T cell vaccines and diagnostics.
Mitaksov, V., Truscott, S.M., Lybarger, L., Connolly, J.M., Hansen, T.H., Fremont, D.H.(2007) Chem Biol 14: 909-922
- PubMed: 17719490
- DOI: https://doi.org/10.1016/j.chembiol.2007.07.010
- Primary Citation of Related Structures:
2QRI, 2QRS, 2QRT - PubMed Abstract:
MHC class I peptide complexes (pMHC) are routinely used to enumerate T cell populations and are currently being evaluated as vaccines to tumors and specific pathogens. Herein, we describe the structures of three generations of single-chain pMHC progressively designed for the optimal presentation of covalently associated epitopes. Our ultimate design employs a versatile disulfide trap between an invariant MHC residue and a short C-terminal peptide extension. This general strategy is nondisruptive of native pMHC conformation and T cell receptor engagement. Indeed, cell-surface-expressed MHC complexes with disulfide-trapped epitopes are refractory to peptide exchange, suggesting they will make safe and effective vaccines. Furthermore, we find that disulfide-trap stabilized, recombinant pMHC reagents reliably detect polyclonal CD8 T cell populations as proficiently as conventional reagents and are thus well suited to monitor or modulate immune responses during pathogenesis.
Organizational Affiliation:
Pathology and Immunology, Washington University School of Medicine, St. Louis, MO 63110, USA.
