Evolution of Emx genes and brain development in vertebrates

T. Patarnello, L. Bargelloni, E. Boncinelli, F. Spada, M. Pannese, V. Broccoli

Research output: Contribution to journalArticlepeer-review


Emx1 and Emx2 genes are known to be involved in mammalian forebrain development. In order to investigate the evolution of the Emx gene family in vertebrates, a phylogenetic analysis was carried out on the Emx genes sequenced in man, mice, frogs, coelacanths and zebrafish. The results demonstrated the existence of two clades (Emx1 and Emx2), each grouping one of the two genes of the investigated taxa. The only exception was the zebrafish Emx1-like gene which turned out to be a sister group to both the Emx1 and Emx2 clusters. Such striking sequence divergence observed for the zebrafish Emx1-like gene could indicate that it is not orthologous to the other Emx1 genes, and therefore, in vertebrates there must be three Emx genes. Alternatively, if the zebrafish emx1 gene is orthologous to the tetrapod one, it must have undergone to strong diversifying selection.

Original languageEnglish
Pages (from-to)1763-1766
Number of pages4
JournalProceedings of the Royal Society B: Biological Sciences
Issue number1389
Publication statusPublished - Dec 22 1997

ASJC Scopus subject areas

  • Agricultural and Biological Sciences(all)
  • Agricultural and Biological Sciences (miscellaneous)


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