7UGM

Crystal Structure of BG24-iGL CDR3mat Fab

7UGM の概要

• エントリーDOI: 10.2210/pdb7ugm/pdb
• 分子名称: BG24-iGL CDR3mat Fab heavy chain, BG24-iGL CDR3mat Fab light chain (3 entities in total)
• 機能のキーワード: fab, igg, bg24, anti-hiv antibody, bnab, 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: 46195.43

構造登録者

Dam, K.A.,Barnes, C.O.,Bjorkman, P.J. (登録日: 2022-03-25, 公開日: 2022-11-09, 最終更新日: 2024-11-06)

主引用文献

Dam, K.A.,Barnes, C.O.,Gristick, H.B.,Schoofs, T.,Gnanapragasam, P.N.P.,Nussenzweig, M.C.,Bjorkman, P.J.
HIV-1 CD4-binding site germline antibody-Env structures inform vaccine design.
Nat Commun, 13:6123-6123, 2022

PubMed Abstract: BG24, a VRC01-class broadly neutralizing antibody (bNAb) against HIV-1 Env with relatively few somatic hypermutations (SHMs), represents a promising target for vaccine strategies to elicit CD4-binding site (CD4bs) bNAbs. To understand how SHMs correlate with BG24 neutralization of HIV-1, we report 4.1 Å and 3.4 Å single-particle cryo-EM structures of two inferred germline (iGL) BG24 precursors complexed with engineered Env-based immunogens lacking CD4bs N-glycans. Structures reveal critical Env contacts by BG24 and identify antibody light chain structural features that impede Env recognition. In addition, biochemical data and cryo-EM structures of BG24 variants bound to Envs with CD4bs glycans present provide insights into N-glycan accommodation, including structural modes of light chain adaptations in the presence of the N276 glycan. Together, these findings reveal Env regions critical for germline antibody recognition and potential sites to alter in immunogen design.

PubMed: 36253376
DOI: 10.1038/s41467-022-33860-2

実験手法

X-RAY DIFFRACTION (1.4 Å)