eLife Assessment
This manuscript provides a valuable in-depth biochemical analysis of p53 isoforms, highlighting their aggregation propensity, interaction with chaperones, and potential dominant-negative effects on p53 family members. The study presents solid evidence of isoform-specific properties, which may contribute to protein misfolding and impaired cellular function in cancer. While highly informative, the findings would benefit from further discussion of physiological relevance, given the high isoform expression levels used, and addressing prior evidence of isoform-specific transcriptional activity. Overall, this work significantly advances our understanding of p53 isoform biochemistry and its implications for cancer research.