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Zoological Research
Kunming Institute of Zoology, Chinese Academy of Sciences
ISSN: 2095-8137
Vol. 30, No. 5, 2009, pp. 473-479
Bioline Code: zr09073
Full paper language: English
Document type: Research Article
Document available free of charge

Zoological Research, Vol. 30, No. 5, 2009, pp. 473-479

 en Expansion of the Actin Gene Family in Amphioxus
Wei, Yun-hu; Zhang, Yu-jun; Chen, Yuan & Mao, Bing-yu


Actins are a small family of ubiquitous proteins that are essential cytoskeletal components and are highly conserved during evolution. Actins are usually divided into two classes, the cytoplasmic and muscle actins, which have different functional roles. Here we systematically analyzed the actin genes in the genome of the primitive chordate amphioxus ( Branchiostoma floridae check for this species in other resources ). We found that amphioxus contains more than 30 actin genes, many of which are linked. Phylogenetic analysis suggests the amphioxus actin genes have clearly undergone extensive expansion through tandem duplications. The actin genes' structure also varies a lot, containing 2 to 7 exons. We also cloned two muscle type of actin genes from the amphioxus (B. belcheri) and compared their expression patterns during early development. The slight difference in their expression suggests functional diversification of these actin genes. Our results shed light on the evolution both of actin genes themselves and their functional roles in chordate development.

Amphioxus; Actin; Gene family; Evolution; Expression pattern

© Copyright 2009 Kunming Institute of Zoology, the Chinese Academy of Sciences
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