Development Genes and Evolution

, Volume 213, Issue 10, pp 505–509 | Cite as

Characterisation of an amphioxus Fringe gene and the evolution of the vertebrate segmentation clock

Short Communication

Abstract

In mouse and chick embryos, cyclic expression of lunatic fringe has an important role in the regulation of mesoderm segmentation. We have isolated a Fringe gene from the protochordate amphioxus. Amphioxus is the closest living relative of the vertebrates, and has mesoderm that is definitively segmented in a manner that is similar to, and probably homologous with, that of vertebrates. AmphiFringe is placed basal to vertebrate Fringe genes in molecular phylogenetic analyses, indicating that the duplications that formed radical-, manic- and lunatic fringe are specific to the vertebrate lineage. AmphiFringe expression was detected in the anterior neural plate of early neurulae, where it resolved into a series of segmental patches by the mid-neurulae stage. No AmphiFringe transcripts were detected in the mesoderm. Based on these observations, we propose a model depicting a successive recruitment of Fringe in the maintenance then regulation of segmentation during vertebrate evolution.

Keywords

Amphioxus Fringe Somite Evolution Segmentation 

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Copyright information

© Springer-Verlag 2003

Authors and Affiliations

  1. 1.School of Animal and Microbial SciencesThe University of ReadingReadingUK

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