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Vinogradov, S N; Fernandez, I; Hoogewijs, D; Arredondo-Peter, R (2011). Phylogenetic relationships of 3/3 and 2/2 hemoglobins in archaeplastida genomes to bacterial and other eukaryote hemoglobins. Molecular Plant, 4(1):42-58.

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Abstract

Land plants and algae from a supergroup, the Archaeplastida, believed to be monophyletic. We report the results of an analysis of the phylogeny of putative globins in the currently available genomes to bacterial and other eukaryote hemoglobins (Hbs). Archaeplastida genomes have 3/3 and 2/2 Hbs in Ricinus communis. Bayesian analysis shows that plant 3/3 Hbs are related to vertebrate neuroglobins and bacterial flavohemoglobins (FHbs). We sought to define the bacterial groups, whose ancestors shared the precursors of Archaeplastida Hbs, via Bayesian and neighbor-joining analyses based on COBALT alignment of representative sets of bacterial 3/3 FHb-like globins and group 1 and 2 2/2 Hbs with the corresponding Archaeplastida Hbs. The results suggest that the Archaeplastida 3/3 and group 1 2/2 Hbs could have originated from the horizontal gene transfers (HGTs) that accompanied the two generally accepted endosymbioses of a proteobacterium and a cyanobacterium with a eukaryote ancestor. In contrast, the origin of the group 2 2/2 unexpectedly appears to involve HGT from a bacterium ancestral to Chloroflexi, Deinococcales, Bacilli, and Actinomycetes. Furthermore, although intron positions and phases are mostly conserved among the land plant 3/3 and 2/2 globin genes, introns are absent in the algal 3/3 genes and intron positions and phases are highly variable in their 2/2 genes. Thus, introns are irrelevant to globin evolution in Archaeplastida.

Item Type:Journal Article, refereed, original work
Communities & Collections:04 Faculty of Medicine > Institute of Physiology
07 Faculty of Science > Institute of Physiology

04 Faculty of Medicine > Center for Integrative Human Physiology
DDC:570 Life sciences; biology
610 Medicine & health
Language:English
Date:15 October 2011
Deposited On:27 Jan 2011 14:17
Last Modified:27 Nov 2013 23:24
Publisher:Oxford University Press
ISSN:1674-2052
Funders:SEP-PROMEP, Consejo Nactional de Ciencia y Tecnologia, Mexico, Flanders Fund for Scientific Research
Publisher DOI:10.1093/mp/ssq040
PubMed ID:20952597
Citations:Web of Science®. Times Cited: 9
Google Scholar™
Scopus®. Citation Count: 11

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