SUPERANTIGEN CLASS II MHC COMPLEX STRUCTURE AND FUNCTION

导致中毒性休克的超抗原的分子机制 综合征TSST-1与人II类组织相容性抗原结合， T细胞受体将通过高分辨率X射线晶体学进行研究。 可溶形式的II类MHC分子HLA-DR 1之间的复合物将 与TSST-1和选定的亚片段复合结晶。 一 与TSST相互作用的α-β T细胞受体（TCR）的可溶形式- l将被构建，并试图形成和结晶 三元复合物DR 1：TSST-1：TCR。 还提出了一种发现和构造可解 与TSST-1相互作用的γ-δ TCR形式。 如果成功，这 可能允许活性免疫球蛋白中γ-δ TCR的结构确定， 复合物（DR 1：TSST-1：γ-δ TCR）。

The molecular mechanism by which the superantigen that causes Toxic Shock Syndrome, TSST-l, binds to human class II histocompatibility antigen and T-cell receptors will be studied by high resolution X-ray crystallography. A complex between a soluble form of the class II MHC molecule HLA-DR1 will be crystallized in complex with TSST-l and selected subfragments. A soluble form of alpha-beta T-cell receptor (TCR) that interacts with TSST- l will be constructed and attempts made to form and to crystallize the ternary complex DR1:TSST-1:TCR. A strategy is also proposed for discovering and constructing a soluble form of a gamma-delta TCR that interacts with TSST-1. If successful, this might allow the structure determination of a gamma-delta TCR in an active complex (DR1:TSST-1: gamma-delta TCR).