[Paper] An experimentally determined evolutionary model dramatically improves phylogenetic fit


#1

All modern approaches to molecular phylogenetics require a quantitative model for how genes evolve. Unfortunately, existing evolutionary models do not realistically represent the site-heterogeneous selection that governs actual sequence change. Attempts to remedy this problem have involved augmenting these models with a burgeoning number of free parameters. Here I demonstrate an alternative: experimental determination of a parameter-free evolutionary model via mutagenesis, functional selection, and deep sequencing. Using this strategy, I create an evolutionary model for influenza nucleoprotein that describes the gene phylogeny far better than existing models with dozens or even hundreds of free parameters. High-throughput experimental strategies such as the one employed here provide fundamentally new information that has the potential to transform the sensitivity of phylogenetic analyses.

by Jesse Bloom, FHCRC. I had no idea he was doing this, and talk to him on a regular basis!


#2

He’s giving a talk on this Wednesday at the UW. I plan on going.


#3

Talk details: http://www.gs.washington.edu/news/combi.htm