Alternative start and termination sites of transcription drive most transcript isoform differences across human tissues.

ABSTRACT: Most human genes generate multiple transcript isoforms. The differential expression of these isoforms can help specify cell types. Diverse transcript isoforms arise from the use of alternative transcription start sites, polyadenylation sites and splice sites; however, the relative contribution of these processes to isoform diversity in normal human physiology is unclear. To address this question, we investigated cell type-dependent differences in exon usage of over 18 000 protein-coding genes in 23 cell types from 798 samples of the Genotype-Tissue Expression Project. We found that about half of the expressed genes displayed tissue-dependent transcript isoforms. Alternative transcription start and termination sites, rather than alternative splicing, accounted for the majority of tissue-dep

SUBMITTER: Reyes A 

PROVIDER: S-EPMC5778607 | biostudies-literature | 2018 Jan

REPOSITORIES: biostudies-literature