4K55

Structure of the extracellular domain of butyrophilin BTN3A1 in complex with (E)-4-hydroxy-3-methyl-but-2-enyl pyrophosphate (HMBPP)

4K55 の概要

• エントリーDOI: 10.2210/pdb4k55/pdb
• 関連するPDBエントリー: 4jkw
• 分子名称: Butyrophilin subfamily 3 member A1, (2E)-4-hydroxy-3-methylbut-2-en-1-yl trihydrogen diphosphate (3 entities in total)
• 機能のキーワード: immunoglobulin superfamily, signaling protein
• 由来する生物種: Homo sapiens (human)
• 細胞内の位置: Cell membrane; Single-pass type I membrane protein: O00481
• タンパク質・核酸の鎖数: 1
• 化学式量合計: 14034.61

構造登録者

Kumar, A.,Mori, L.,De Libero, G. (登録日: 2013-04-13, 公開日: 2013-07-24, 最終更新日: 2024-11-27)

主引用文献

Vavassori, S.,Kumar, A.,Wan, G.S.,Ramanjaneyulu, G.S.,Cavallari, M.,El Daker, S.,Beddoe, T.,Theodossis, A.,Williams, N.K.,Gostick, E.,Price, D.A.,Soudamini, D.U.,Voon, K.K.,Olivo, M.,Rossjohn, J.,Mori, L.,De Libero, G.
Butyrophilin 3A1 binds phosphorylated antigens and stimulates human gamma delta T cells.
Nat.Immunol., 14:908-916, 2013

PubMed Abstract: Human T cells that express a T cell antigen receptor (TCR) containing γ-chain variable region 9 and δ-chain variable region 2 (Vγ9Vδ2) recognize phosphorylated prenyl metabolites as antigens in the presence of antigen-presenting cells but independently of major histocompatibility complex (MHC), the MHC class I-related molecule MR1 and antigen-presenting CD1 molecules. Here we used genetic approaches to identify the molecule that binds and presents phosphorylated antigens. We found that the butyrophilin BTN3A1 bound phosphorylated antigens with low affinity, at a stoichiometry of 1:1, and stimulated mouse T cells with transgenic expression of a human Vγ9Vδ2 TCR. The structures of the BTN3A1 distal domain in complex with host- or microbe-derived phosphorylated antigens had an immunoglobulin-like fold in which the antigens bound in a shallow pocket. Soluble Vγ9Vδ2 TCR interacted specifically with BTN3A1-antigen complexes. Accordingly, BTN3A1 represents an antigen-presenting molecule required for the activation of Vγ9Vδ2 T cells.

PubMed: 23872678
DOI: 10.1038/ni.2665

実験手法

X-RAY DIFFRACTION (1.91 Å)