3EYQ

Crystal structure of MJ5 Fab, a germline antibody variant of anti-human cytomegalovirus antibody 8f9

3EYQ の概要

• エントリーDOI: 10.2210/pdb3eyq/pdb
• 関連するPDBエントリー: 3EYF 3EYO 3F12
• 分子名称: M2J5 Fab, 8f9 Fab (3 entities in total)
• 機能のキーワード: human cytomegalovirus, antibody, immunoglobulin domain, immune system
• 由来する生物種: Homo sapiens; 詳細
• タンパク質・核酸の鎖数: 2
• 化学式量合計: 49521.25

構造登録者

Thomson, C.A.,Bryson, S.,McLean, G.R.,Creagh, A.L.,Pai, E.F.,Schrader, J.W. (登録日: 2008-10-21, 公開日: 2008-12-16, 最終更新日: 2024-10-16)

主引用文献

Thomson, C.A.,Bryson, S.,McLean, G.R.,Creagh, A.L.,Pai, E.F.,Schrader, J.W.
Germline V-genes sculpt the binding site of a family of antibodies neutralizing human cytomegalovirus.
Embo J., 27:2592-2602, 2008

PubMed Abstract: Immunoglobulin genes are generated somatically through specialized mechanisms resulting in a vast repertoire of antigen-binding sites. Despite the stochastic nature of these processes, the V-genes that encode most of the antigen-combining site are under positive evolutionary selection, raising the possibility that V-genes have been selected to encode key structural features of binding sites of protective antibodies against certain pathogens. Human, neutralizing antibodies to human cytomegalovirus that bind the AD-2S1 epitope on its gB envelope protein repeatedly use a pair of well-conserved, germline V-genes IGHV3-30 and IGKV3-11. Here, we present crystallographic, kinetic and thermodynamic analyses of the binding site of such an antibody and that of its primary immunoglobulin ancestor. These show that these germline V-genes encode key side chain contacts with the viral antigen and thereby dictate key structural features of the hypermutated, high-affinity neutralizing antibody. V-genes may thus encode an innate, protective immunological memory that targets vulnerable, invariant sites on multiple pathogens.

PubMed: 18772881
DOI: 10.1038/emboj.2008.179

実験手法

X-RAY DIFFRACTION (2.4 Å)