AI Article Synopsis
- The V3 loop of the HIV-1 envelope glycoprotein gp120 can adapt to bind to the CCR5 and CXCR4 coreceptors, which is key in the virus's ability to infect cells.
- Selection of CCR5 is common in early infection, while later transitions to CXCR4 indicate disease progression.
- A new predictive model was created using 2,054 V3 loop sequences to assess coreceptor selectivity based on specific genetic markers, potentially aiding in personalized treatment decisions for patients.
Article Abstract
Despite its sequence variability and structural flexibility, the V3 loop of the HIV-1 envelope glycoprotein gp120 is capable of recognizing cell-bound coreceptors CCR5 and CXCR4 and infecting cells. Viral selection of CCR5 is associated with the early stages of infection, and transition to selection of CXCR4 indicates disease progression. We have developed a predictive statistical model for coreceptor selectivity that uses the discrete property of net charge and the binary coreceptor preference markers of the N(6)X(7)[T/S](8)X(9) glycosylation motif and 11/24/25 positive amino acid rule. The model is based on analysis of 2,054 V3 loop sequences from patient data and allows us to infer the most likely state of the disease from physicochemical characteristics of the sequences. The performance of the model is comparable to established sequence-based predictive methods, and may be used in combination with other methods as a supportive diagnostic for coreceptor selection. This model may be used for personalized medical decisions in administering coreceptor-specific therapies.
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| http://dx.doi.org/10.1089/AID.2012.0173 | DOI Listing |
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