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© Emmanuelle Quemin
Electron micrograph of the hyperthermophilic archaea Sulfolobus islandicus strain LAL14/1.
Publication : Cold Spring Harbor perspectives in biology

Eukaryotic origins: How and when was the mitochondrion acquired?

Scientific Fields
Diseases
Organisms
Applications
Technique

Published in Cold Spring Harbor perspectives in biology - 18 Jul 2014

Poole AM, Gribaldo S

Link to Pubmed [PMID] – 25038049

Cold Spring Harb Perspect Biol 2014 Dec;6(12):a015990

Comparative genomics has revealed that the last eukaryotic common ancestor possessed the hallmark cellular architecture of modern eukaryotes. However, the remarkable success of such analyses has created a dilemma. If key eukaryotic features are ancestral to this group, then establishing the relative timing of their origins becomes difficult. In discussions of eukaryote origins, special significance has been placed on the timing of mitochondrial acquisition. In one view, mitochondrial acquisition was the trigger for eukaryogenesis. Others argue that development of phagocytosis was a prerequisite to acquisition. Results from comparative genomics and molecular phylogeny are often invoked to support one or the other scenario. We show here that the associations between specific cell biological models of eukaryogenesis and evolutionary genomic data are not as strong as many suppose. Disentangling these eliminates many of the arguments that polarize current debate.

http://www.ncbi.nlm.nih.gov/pubmed/25038049