3TJH

42F3-p3A1/H2-Ld complex

3TJH の概要

• エントリーDOI: 10.2210/pdb3tjh/pdb
• 関連するPDBエントリー: 2OI9 3TF7 3TFK 3TPU
• 分子名称: H2-Ld SBM2, p3A1, 42F3 alpha, ... (5 entities in total)
• 機能のキーワード: ig mhc, antigen recognition, tcr-pmhc, membrane receptor, immune system
• 由来する生物種: Mus musculus; 詳細
• タンパク質・核酸の鎖数: 4
• 化学式量合計: 75537.61

構造登録者

Adams, J.J.,Kruse, A.,Kranz, D.M.,Garcia, K.C. (登録日: 2011-08-24, 公開日: 2011-12-07, 最終更新日: 2023-09-13)

主引用文献

Adams, J.J.,Narayanan, S.,Liu, B.,Birnbaum, M.E.,Kruse, A.C.,Bowerman, N.A.,Chen, W.,Levin, A.M.,Connolly, J.M.,Zhu, C.,Kranz, D.M.,Garcia, K.C.
T cell receptor signaling is limited by docking geometry to peptide-major histocompatibility complex.
Immunity, 35:681-693, 2011

PubMed Abstract: T cell receptor (TCR) engagement of peptide-major histocompatibility complex (pMHC) is essential to adaptive immunity, but it is unknown whether TCR signaling responses are influenced by the binding topology of the TCR-peptide-MHC complex. We developed yeast-displayed pMHC libraries that enabled us to identify new peptide sequences reactive with a single TCR. Structural analysis showed that four peptides bound to the TCR with distinct 3D and 2D affinities using entirely different binding chemistries. Three of the peptides that shared a common docking mode, where key TCR-MHC germline interactions are preserved, induced TCR signaling. The fourth peptide failed to induce signaling and was recognized in a substantially different TCR-MHC binding mode that apparently exceeded geometric tolerances compatible with signaling. We suggest that the stereotypical TCR-MHC docking paradigm evolved from productive signaling geometries and that TCR signaling can be modulated by peptides that are recognized in alternative TCR-pMHC binding orientations.

PubMed: 22101157
DOI: 10.1016/j.immuni.2011.09.013

実験手法

X-RAY DIFFRACTION (2.12 Å)