The evolution of extracellular hemoglobins of annelids, vestimentiferans, and pogonophorans

Enrico Negrisolo, Alberto Pallavicini, Roberto Barbato, Sylvia Dewilde, Anna Ghiretti-Magaldi, Luc Moens, Gerolamo Lanfranchi

Risultato della ricerca: Contributo su rivistaArticolo in rivistapeer review

Abstract

The evolution of extracellular hemoglobins of annelids, vestimentiferans, and pogonophorans was investigated by applying cladistic and distance-based approaches to reconstruct the phylogenetic relationships of this group of respiratory pigments. We performed this study using the aligned sequences of globin and linker chains that are the constituents of these complex molecules. Three novel globin and two novel linker chains of Sabella spallanzanii described in an accompanying paper (Pallavicini, A., Negrisolo, E., Barbate, R., Dewilde, S., Ghiretti-Magaldi, A., Moens, L., and Lanfranchi, G. (2001) J. Biol. Chem. 276, 26384-26390) were also included. Our results allowed us to test previous hypotheses on the evolutionary pathways of these proteins and to formulate a new most parsimonious model of molecular evolution. According to this novel model, the genes coding for the polypeptides forming these composite molecules were already present in the common ancestor of annelids, vestimentiferans, and pogonophorans.

Lingua originaleInglese
pagine (da-a)26391-26397
Numero di pagine7
RivistaJournal of Biological Chemistry
Volume276
Numero di pubblicazione28
DOI
Stato di pubblicazionePubblicato - 2001

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