Beyond the gene: decoding alternative isoforms.

Most human genes produce multiple protein isoforms through alternative splicing, with recent evidence showing these isoforms are widespread, biochemically distinct, and linked to disease.

• Why it matters: Understanding the full diversity of the human proteome is crucial because traditional gene-centric views overlook the functional complexity introduced by alternative isoforms, impacting disease research and treatment.
• What they did: The study employed advanced techniques like long-read RNA sequencing, sensitive proteomics, and high-throughput isoform perturbation methods to analyze isoform expression and function.
• The result: Findings reveal that most alternative isoforms are expressed at the protein level and are biochemically distinct, emphasizing the need for isoform-aware approaches to better understand molecular biology and disease mechanisms.