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Structure-based design of native-like HIV-1 envelope trimers to silence non-neutralizing epitopes and eliminate CD4 binding.

Nat Commun. 2017; 
KulpDaniel W,SteichenJon M,PauthnerMatthias,HuXiaozhen,SchiffnerTorben,LiguoriAlessia,CottrellChristopher A,Havenar-DaughtonColin,OzorowskiGabriel,GeorgesonErik,KalyuzhniyOleksandr,WillisJordan R,KubitzMichael,AdachiYumiko,ReissSamantha M,ShinMia,de ValNatalia,WardAndrew B,CrottyShane,BurtonDennis R,SchiefWilli
Products/Services Used Details Operation
The genes encoding the native-like trimers and HIV bnAbs were synthesized by GenScript. PBS pH 7.4 (Thermo Scientific, Catalog #10010-023) per well for assays detecting monoclonal and polyclonal antibodies, respectively, and incubated ON at 4°C. Human PGT121 Fab was used for trimers and non-nAbs capture (see Gene Synthesis and Protein Production), rabbit His-tag Antibody (GenScript, Catalog #A00174-40) was used for bnAbs capture.

摘要

Elicitation of broadly neutralizing antibodies (bnAbs) is a primary HIV vaccine goal. Native-like trimers mimicking virion-associated spikes present nearly all bnAb epitopes and are therefore promising vaccine antigens. However, first generation native-like trimers expose epitopes for non-neutralizing antibodies (non-nAbs), which may hinder bnAb induction. We here employ computational and structure-guided design to develop improved native-like trimers that reduce exposure of non-nAb epitopes in the V3-loop and trimer base, minimize both CD4 reactivity and CD4-induced non-nAb epitope exposure, and increase thermal stability while maintaining bnAb antigenicity. In rabbit immunizations with native-like tri... More

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