Salminen MO, Ehrenberg PK, Mascola JR, Dayhoff DE, Merling R, Blake B, Louder M, Hegerich S, Polonis VR, Birx DL, Robb ML, McCutchan FE, Michael NL. Construction and biological characterization of infectious molecular clones of HIV-1 subtypes B and E (CRF01_AE) generated by the polymerase chain reaction.
Virology 2000;
278:103-10. [PMID:
11112486 DOI:
10.1006/viro.2000.0640]
[Citation(s) in RCA: 21] [Impact Index Per Article: 0.9] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/22/2022]
Abstract
We previously described the use of extended polymerase chain reaction (PCR) to amplify contiguous 9.2-kilobase (kb) single-long terminal repeat (LTR) proviral sequences from HIV-1 genetic subtypes A through G. We now extend these findings by describing a novel vector system to recover infectious molecular clones from long PCR amplicons. Directional ligation of 9.2-kb proviral amplicons into a recovery vector reconstitutes missing LTR sequences, providing candidate molecular clones for infectivity screening. We show that a previously characterized infectious molecular clone of HIV-1 retains its biological properties upon recovery with this strategy. Three additional infectious molecular clones generated, from primary isolates of subtype B (HIV-1(WR27)) and circulating recombinant form 01_AE (subtype E) (HIV-1(CM235)) by subtype-specific LTR reconstitution, displayed biological properties reflecting their cognate parental isolates. This represents the first report of infectious molecular clones from circulating recombinant form 01_AE (subtype E).
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