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Our goal was to determine the contribution of HIV-1 reverse transcriptase tryptophan repeat motif residues to virion maturation. With the exception of W402A, we found none of the single substitution mutations exerted major impacts on virus assembly or processing. However, all mutants except for W410A exhibited significant decreases in virus-associated RT, presumably a result of unstable RT mutant...
HIV-1 virus particle processing is mediated by protease (PR), with enzymatic activation triggered by Gag–Pol/Gag–Pol interaction. We previously reported that truncation mutations at the reverse transcriptase (RT) connection subdomain markedly impair virus particle processing, suggesting an important role for the RT subdomain in PR-mediated virus processing. A highly conserved tryptophan (Trp) repeat...
We have constructed human immunodeficiency virus (HIV) gag mutants by increasing the matrix protein (MA) sequences via tandemly repeated duplication of the central 107-MA codons. Instead of a total of 132 amino acid residues for the wild-type MA, the resultant mutants designated as MA2, MA3, and MA4 contained a total of 242, 352, and 462 codons in the MA domains, respectively. Analysis indicated that...
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