Protein isoforms encoded by the pX region of human T-cell leukemia/lymphotropic virus type I.

Journal Article (Journal Article)

The pX region of the human T-cell leukemia/lymphotropic virus type I (HTLV-I) contains at least four open reading frames (orfI-orfIV). orf III and orf IV encode the regulatory HTLV-I proteins Rex and Tax, which together modulate viral expression, and the p21rex protein of unknown function. By using the reverse transcriptase and polymerase chain reaction techniques on the RNA of an HTLV-I-infected cell culture, we uncovered the existence of alternatively spliced mRNAs generated through the use of three splice acceptor sites. These mRNAs encoded protein isoforms derived from the HTLV-I orf I (p12I) and orf II (p13II and p30II). An additional acceptor splice site, used in the processing of the env and tax/rex mRNAs and a singly spliced mRNA for the p21rex protein, was also identified. All of these HTLV-I mRNAs were also detected in freshly isolated cells from HTLV-I-infected individuals. Thus HTLV-I, like the human immunodeficiency virus type 1, has developed fine posttranscriptional mechanisms to increase the complexity of its genome.

Full Text

Duke Authors

Cited Authors

  • Koralnik, IJ; Gessain, A; Klotman, ME; Lo Monico, A; Berneman, ZN; Franchini, G

Published Date

  • September 15, 1992

Published In

Volume / Issue

  • 89 / 18

Start / End Page

  • 8813 - 8817

PubMed ID

  • 1528897

Pubmed Central ID

  • PMC50011

International Standard Serial Number (ISSN)

  • 0027-8424

Digital Object Identifier (DOI)

  • 10.1073/pnas.89.18.8813


  • eng

Conference Location

  • United States