Advances in understanding the initiation of HIV-1 reverse transcription
نویسندگان
چکیده
منابع مشابه
Initiation of HIV Reverse Transcription
Reverse transcription of retroviral genomes into double stranded DNA is a key event for viral replication. The very first stage of HIV reverse transcription, the initiation step, involves viral and cellular partners that are selectively packaged into the viral particle, leading to an RNA/protein complex with very specific structural and functional features, some of which being, in the case of H...
متن کاملStructural basis for the specificity of the initiation of HIV-1 reverse transcription.
Initiation of human immunodeficiency virus type 1 (HIV-1) reverse transcription requires specific recognition of the viral genome, tRNA3Lys, which acts as primer, and reverse transcriptase (RT). The specificity of this ternary complex is mediated by intricate interactions between HIV-1 RNA and tRNA3Lys, but remains poorly understood at the three-dimensional level. We used chemical probing to ga...
متن کاملInitiation of HIV Reverse Transcription: Is Enzyme Flipping Required?
Liu and colleagues have recently studied dynamic changes in the orientation of HIV reverse transcriptase (RT) on its nucleic acid substrate during initiation of DNA synthesis. The authors employed a single molecule FRET assay and revealed the existence of an equilibrium between polymerase-competent and "flipped" polymerase-incompetent orientations. RT flipping correlates with enzyme pausing dur...
متن کاملNew insights into the formation of HIV-1 reverse transcription initiation complex.
HIV-1 reverse transcriptase uses the host tRNA3(Lys) as a primer for the synthesis of the minus DNA strand. The first event in viral replication is thus the annealing of tRNA to the primer binding site (PBS) in the 5' UTR of the viral RNA. This event requires a major RNA rearrangement which is chaperoned by the viral NC protein. The binding of NC to nucleic acids is essentially non-specific, ho...
متن کاملInitiation of HIV-1 reverse transcription and functional role of nucleocapsid-mediated tRNA/viral genome interactions.
HIV-1 reverse transcription is initiated from a tRNA(Lys)(3) molecule annealed to the viral RNA at the primer binding site (PBS). The annealing of tRNA(Lys)(3) requires the opening of its three-dimensional structure and RNA rearrangements to form an efficient initiation complex recognized by the reverse transcriptase. This annealing is mediated by the nucleocapsid protein (NC). In this paper, w...
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ژورنال
عنوان ژورنال: Current Opinion in Structural Biology
سال: 2020
ISSN: 0959-440X
DOI: 10.1016/j.sbi.2020.07.005