Solving the Convergence Problem in the Synthesis of Triantennary N-Glycan Relevant to Prostate-Specific Membrane Antigen (PSMA)
摘要:
The first total synthesis of triantennary, fully sialylated N-glycan of complex type is described. Two strategies for installation of sialylated antennae are explored, and both approaches converge on a global glycosylation step that delivers the desired tetradecasaccharide in good yields.
The present invention relates, in general, to human immunodeficiency virus (HIV), and, in particular, to a vaccine for HIV-1, comprising synthetic V3 glycopeptides, and to methods of making and using same.
Chemical Synthesis of Highly Congested gp120 V1V2 <i>N</i>-Glycopeptide Antigens for Potential HIV-1-Directed Vaccines
作者:Baptiste Aussedat、Yusuf Vohra、Peter K. Park、Alberto Fernández-Tejada、S. Munir Alam、S. Moses Dennison、Frederick H. Jaeger、Kara Anasti、Shelley Stewart、Julie H. Blinn、Hua-Xin Liao、Joseph G. Sodroski、Barton F. Haynes、Samuel J. Danishefsky
DOI:10.1021/ja405990z
日期:2013.9.4
Critical to the search for an effective HIV-1 vaccine is the development of immunogens capable of inducing broadly neutralizing antibodies (BnAbs). A key first step in this process is to design immunogens that can be recognized by known BnAbs. The monoclonal antibody PG9 is a BnAb that neutralizes diverse strains of HIV-1 by targeting a conserved carbohydrate protein epitope in the variable 1 and 2 (V1V2) region of the viral envelope. Important for recognition are two closely spaced N-glycans at Asn(160) and Asn(156). Glycopeptides containing this synthetically challenging bis-N-glycosylated motif were prepared by convergent assembly, and were shown to be antigenic for PG9. Synthetic glycopeptides such as these may be useful for the development of HIV-1 vaccines based on the envelope V1V2 BnAb epitope.