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Phylogenomics of Life-Or-Death Switches in Multicellular Animals: Bcl-2, BH3-Only, and BNip Families of Apoptotic Regulators

Abstract : In this report, we conducted a comprehensive survey of Bcl-2 family members, a divergent group of proteins that regulate programmed cell death by an evolutionarily conserved mechanism. Using comparative sequence analysis, we found novel sequences in mammals, nonmammalian vertebrates, and in a number of invertebrates. We then asked what conclusions could be drawn from phyletic distribution, intron/exon structures, sequence/structure relationships, and phylogenetic analyses within the updated Bcl-2 family. First, multidomain members having a sequence pattern consistent with the conservation of the Bcl-XL/Bax/Bid topology appear to be restricted to multicellular animals and may share a common ancestry. Next, BNip proteins, which were originally identified based on their ability to bind to E1B 19K/Bcl-2 proteins, form three independent monophyletic branches with different evolutionary history. Lastly, a set of Bcl-2 homology 3–only proteins with unrelated secondary structures seems to have evolved after the origin of Metazoa and exhibits diverse expansion after speciation during vertebrate evolution.
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https://hal.archives-ouvertes.fr/hal-00427703
Contributor : Stéphane Delmotte Connect in order to contact the contributor
Submitted on : Wednesday, October 28, 2009 - 5:12:05 PM
Last modification on : Monday, October 4, 2021 - 2:52:05 PM

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A. Aouacheria, F. Brunet, Manolo Gouy. Phylogenomics of Life-Or-Death Switches in Multicellular Animals: Bcl-2, BH3-Only, and BNip Families of Apoptotic Regulators. Molecular Biology and Evolution, Oxford University Press (OUP), 2005, 22 (12), pp.2395-2416. ⟨10.1093/molbev/msi234⟩. ⟨hal-00427703⟩

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