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Mimicry of an HIV Broadly Neutralizing Antibody Epitope With a Synthetic Glycopeptide

Mimicry of an HIV Broadly Neutralizing Antibody Epitope With a Synthetic Glycopeptide

S Munir Alam, Baptiste Aussedat, Yusuf Vohra, R Ryan Meyerhoff, Evan M Cale, William E Walkowicz, Nathan A Radakovich, Kara Anasti, Lawrence Armand, Robert Parks, Laura Sutherland, Richard Scearce, M Gordon Joyce, etc.

Sci Transl Med. 2017 Mar 15;9(381):eaai7521.

PMID: 28298421

Abstract:

A goal for an HIV-1 vaccine is to overcome virus variability by inducing broadly neutralizing antibodies (bnAbs). One key target of bnAbs is the glycan-polypeptide at the base of the envelope (Env) third variable loop (V3). We have designed and synthesized a homogeneous minimal immunogen with high-mannose glycans reflective of a native Env V3-glycan bnAb epitope (Man9-V3). V3-glycan bnAbs bound to Man9-V3 glycopeptide and native-like gp140 trimers with similar affinities. Fluorophore-labeled Man9-V3 glycopeptides bound to bnAb memory B cells and were able to be used to isolate a V3-glycan bnAb from an HIV-1-infected individual. In rhesus macaques, immunization with Man9-V3 induced V3-glycan-targeted antibodies. Thus, the Man9-V3 glycopeptide closely mimics an HIV-1 V3-glycan bnAb epitope and can be used to isolate V3-glycan bnAbs.

Chemicals Related in the Paper:

Catalog Number	Product Name	Structure	CAS Number	Price
AP71246554	MAN-9 Glycan		71246-55-4	Price

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