The HTLV-1 viral oncoproteins Tax and HBZ reprogram the cellular mRNA splicing landscape.

ABSTRACT: Viral infections are known to hijack the transcription and translation of the host cell. However, the extent to which viral proteins coordinate these perturbations remains unclear. Here we used a model system, the human T-cell leukemia virus type 1 (HTLV-1), and systematically analyzed the transcriptome and interactome of key effectors oncoviral proteins Tax and HBZ. We showed that Tax and HBZ target distinct but also common transcription factors. Unexpectedly, we also uncovered a large set of interactions with RNA-binding proteins, including the U2 auxiliary factor large subunit (U2AF2), a key cellular regulator of pre-mRNA splicing. We discovered that Tax and HBZ perturb the splicing landscape by altering cassette exons in opposing manners, with Tax inducing exon inclusion while HBZ indu

SUBMITTER: Vandermeulen C 

PROVIDER: S-EPMC8483338 | biostudies-literature | 2021 Sep

REPOSITORIES: biostudies-literature