Phylogenetic detection of protein sites associated with continuous traits

A phylogenetic significance test for continuous traits finds amino-acid preferences linked to quantitative variation with higher recall at low false-positive rates, enabling whole-genome scans despite higher computation.

• Why it matters: Existing methods for discrete phenotypes do not cover continuous traits, leaving whole-genome searches reliant on ad hoc criteria rather than a validated statistical framework.
• What they did: The authors model site-specific amino-acid preferences as a continuous function of a quantitative trait inferred from extant species, using ancestral trait estimates at internal nodes, then test whether preference depends on the trait.
• The result: Simulations show increased recall at low false-positive rates, and a mammal longevity reanalysis across 62 species yields weak sequence-only evidence for previously proposed lifespan-associated sites; the method is implemented in Pelican.

AI summary of the abstract · may contain errors · not medical advice · read the paper.