IS-PRM-Based Peptide Targeting Informed by Long-Read Sequencing for Alternative Proteome Detection.

ABSTRACT: Alternative splicing is a major contributor of transcriptomic complexity, but the extent to which transcript isoforms are translated into stable, functional protein isoforms is unclear. Furthermore, detection of relatively scarce isoform-specific peptides is challenging, with many protein isoforms remaining uncharted due to technical limitations. Recently, a family of advanced targeted MS strategies, termed internal standard parallel reaction monitoring (IS-PRM), have demonstrated multiplexed, sensitive detection of predefined peptides of interest. Such approaches have not yet been used to confirm existence of novel peptides. Here, we present a targeted proteogenomic approach that leverages sample-matched long-read RNA sequencing (lrRNA-seq) data to predict potential protein isoforms with

SUBMITTER: Korchak JA 

PROVIDER: S-EPMC11544703 | biostudies-literature | 2024 Nov

REPOSITORIES: biostudies-literature