The Natural Products Chemistry Section, LBC, NIDDK has several ongoing projects whose long term aim is to identify and design inhibitors and probes of HIV-1 Envelope-mediated cell fusion. These include the design and development of new gp41-derived peptides and proteins that have dual functions as inhibitors and immunogens, discovery and high resolution structural characterization of new carbohydrate binding proteins that potently inhibit HIV-1 Entry through carbohydrate-mediated interactions with gp120/gp41, discovery of natural product inhibitors of HIV-1 fusion, and structural and mechanistic studies of HIV-1 Envelope-coreceptor interactions. Though great progress has been achieved in developing treatments for and extending the life expectancies of HIV infected individuals, we do not have a cure for this disease and many challenges remain including the development of drug resistance and the cost and availability of treatments. This research program aims to overcome some of these challenges through discovery or design of novel classes of inhibitors and through increased understanding of the viral entry process.

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18
Fiscal Year
2017
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Indirect Cost
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U.S. National Inst Diabetes/Digst/Kidney
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Zhou, Tongqing; Zheng, Anqi; Baxa, Ulrich et al. (2018) A Neutralizing Antibody Recognizing Primarily N-Linked Glycan Targets the Silent Face of the HIV Envelope. Immunity 48:500-513.e6
Lusvarghi, Sabrina; Ghirlando, Rodolfo; Davison, Jack R et al. (2018) Chemical and Biophysical Approaches for Complete Characterization of Lectin-Carbohydrate Interactions. Methods Enzymol 598:3-35
Shahzad-Ul-Hussan, Syed; Sastry, Mallika; Lemmin, Thomas et al. (2017) Insights from NMR Spectroscopy into the Conformational Properties of Man-9 and Its Recognition by Two HIV Binding Proteins. Chembiochem 18:764-771
Bobyk, Kostyantyn D; Mandadapu, Sivakoteswara R; Lohith, Katheryn et al. (2017) Design of HIV Coreceptor Derived Peptides That Inhibit Viral Entry at Submicromolar Concentrations. Mol Pharm 14:2681-2689
Lusvarghi, Sabrina; Bewley, Carole A (2016) Griffithsin: An Antiviral Lectin with Outstanding Therapeutic Potential. Viruses 8:
Lusvarghi, Sabrina; Lohith, Katheryn; Morin-Leisk, Jeanne et al. (2016) Binding Site Geometry and Subdomain Valency Control Effects of Neutralizing Lectins on HIV-1 Viral Particles. ACS Infect Dis 2:882-891
Mason, Rosemarie D; Welles, Hugh C; Adams, Cameron et al. (2016) Targeted Isolation of Antibodies Directed against Major Sites of SIV Env Vulnerability. PLoS Pathog 12:e1005537
Dogo-Isonagie, Cajetan; Lee, Su-Lin; Lohith, Katheryn et al. (2016) Design and synthesis of small molecule-sulfotyrosine mimetics that inhibit HIV-1 entry. Bioorg Med Chem 24:1718-28
Stewart-Jones, Guillaume B E; Soto, Cinque; Lemmin, Thomas et al. (2016) Trimeric HIV-1-Env Structures Define Glycan Shields from Clades A, B, and G. Cell 165:813-26
Mason, Rosemarie D; Welles, Hugh C; Adams, Cameron et al. (2016) Correction: Targeted Isolation of Antibodies Directed against Major Sites of SIV Env Vulnerability. PLoS Pathog 12:e1005674

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