Many viruses, including Severe Acute Respiratory Syndrome Coronavirus 2 (SARS-CoV-2) and Human Immunodeficiency Virus (HIV), use RNA as their genetic material. How viruses harness RNA structure and RNA-protein interactions to control their replication remains obscure. Recent advances in the characterization of HIV-1 reverse transcriptase, the enzyme that converts its single-stranded RNA genome into a double-stranded DNA copy, reveal how the reverse transcription complex evolves during initiation. Here we highlight these advances in HIV-1 structural biology and discuss how they are furthering our understanding of HIV and related ribonucleoprotein complexes implicated in viral disease.
Download full-text PDF |
Source |
---|---|
http://www.ncbi.nlm.nih.gov/pmc/articles/PMC9973426 | PMC |
http://dx.doi.org/10.1016/j.sbi.2020.07.005 | DOI Listing |
Viruses
January 2025
Chantal BIYA International Reference Centre for Research on HIV/AIDS Prevention and Management, Yaoundé P.O. Box 3077, Cameroon.
Islatravir (ISL) is a novel antiretroviral that inhibits HIV-1 reverse transcriptase translocation. The M184V mutation, known to reduce ISL's viral susceptibility in vitro, could arise from prolonged exposure to nucleoside reverse transcriptase inhibitors (NRTI) (3TC). This study evaluated the predictive efficacy of ISL and identified potentially active antiretrovirals in combination among treatment-experienced patients in Cameroon, where NRTIs (3TC) have been the backbone of ART for decades now.
View Article and Find Full Text PDFSci Adv
January 2025
Department of Chemistry, Stanford University, Stanford, CA 94305, USA.
Tigilanol tiglate (EBC-46) is a selective modulator of protein kinase C (PKC) isoforms that is Food and Drug Administration (FDA) approved for the treatment of mast cell tumors in canines with up to an 88% cure rate. Recently, it has been FDA approved for the treatment of soft tissue sarcomas in humans. The role of EBC-46 and, especially, its analogs in efforts to eradicate HIV, treat neurological and cardiovascular disorders, or enhance antigen density in antigen-targeted chimeric antigen receptor-T cell and chimeric antigen receptor-natural killer cell immunotherapies has not been reported.
View Article and Find Full Text PDFJ Antimicrob Chemother
January 2025
CH Tourcoing, Service Universitaire des Maladies Infectieuses, 59200 Tourcoing, France.
Introduction: The specificity of HIV-1 DNA genotypic resistance tests (GRTs) is hampered by the detection of the APOBEC-context drug resistance mutations (AC DRMs), usually harboured by replication-incompetent proviruses. We sought factors associated with defective sequences in the HIV-1 pol region. In addition, AC DRMs and their link with defective sequences were investigated.
View Article and Find Full Text PDFJ Antimicrob Chemother
January 2025
Department of Laboratory Medicine, Yunnan Provincial Infectious Disease Hospital, Kunming 650301, China.
Objectives: This study aimed to evaluate the prevalence and characteristics of drug resistance mutations (DRMs) in patients with low-level viremia (LLV) in Southwestern China, as it has become a growing challenge in AIDS clinical practice.
Methods: This cross-sectional study was performed in Yunnan Province, Southwestern China. LLV was defined as 50-999 copies/mL of plasma viral load with antiretroviral therapy (ART) for at least 6 months.
bioRxiv
January 2025
Department of Microbiology, Immunology, and Cancer Biology, School of Medicine, University of Virginia, Charlottesville, Virginia, USA.
The HIV-1 Rev-RRE regulatory axis plays a crucial role in viral replication by facilitating the nucleo-cytoplasmic export and expression of viral mRNAs with retained introns. In this study, we investigated the impact of variation in Rev-RRE functional activity on HIV-1 replication kinetics and reactivation from latency. Using a novel HIV-1 clone with an interchangeable Rev cassette, we engineered viruses with different Rev functional activities and demonstrated that higher Rev-RRE activity confers greater viral replication capacity while maintaining a constant level of Nef expression.
View Article and Find Full Text PDFEnter search terms and have AI summaries delivered each week - change queries or unsubscribe any time!