[Popgenlunch] Fwd: Genome Sciences presents Dr. Charles Kurland, January 14, 2013

Joe Felsenstein joe at gs.washington.edu
Wed Jan 9 16:33:26 PST 2013

Folks --

This talk by Chuck Kurland, visiting from Sweden, is recommended. Chuck always has an unorthodox and interesting perspective on molecular evolution and microbial evolution. Chuck has had a long and distiunguished career working on ribsome structure and function, and on the evolution of endoparasitic bacteria.

If anyone wants to meet with him, he will be around Monday and you can contact me to make arrangements.

Health Sciences RR134 is in the wing next to the Plaza Cafe (the main hospital cafeteria), and can be entered from the corridor on the 1st floor that leads past the BB wing elevators.

Joe Felsenstein joe at gs.washington.edu
Department of Genome Sciences and Department of Biology,
University of Washington, Box 355065, Seattle, WA 98195-5065 USA


> Presents:


> Dr. Charles Kurland

> Department of Biology

> Microbial Ecology Group

> University of Lund, Sweden


> “Genome Content Phylogeny of the Three Superkingdoms: Phylogenetic reconstruction for genomicists and consenting adults”


> Monday, January 14, 2013

> 1:30pm – 2:30pm

> Health Sciences RR134


> Abstract: The bacterial rooting of the three superkingdoms in sequence based gene

> (SBG) trees is challenged by phylogenetic reconstructions based on genome content of

> compact protein domains. We find that protein domains at the level of the superfamily

> (SF) from sequenced genomes for each of three superkingdoms implement fully resolved

> rooted (FRR) trees. Such genome content trees identify archaea and bacteria (akaryotes)

> as sister clades that diverge from an akaryote common ancestor, LACA. Several

> eukaryote sister clades diverge from a eukaryote common ancestor, LECA. LACA and

> LECA descend in parallel from the most recent universal common ancestor (MRUCA),

> which is not a bacterium. MRUCA presents 75% of the unique SFs encoded by extant

> genomes, each encoding a proteome partially overlapping all others. The evolution of

> proteomes in each superkingdom is both reductive in numbers of unique SFs as well as

> cumulative in the abundance of surviving SFs. MRUCA’s proteome is too complex to be

> that of the first cell, but it may be a more recent bottlenecked survivor of extreme global

> climate oscillations


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