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. 1994 Oct;39(4):347-56.
doi: 10.1007/BF00160267.

Evolution of actin gene families of sea urchins

H Fang  1 , B P Brandhorst
Affiliations

Evolution of actin gene families of sea urchins

H Fang et al. J Mol Evol. 1994 Oct.

Abstract

The actin gene family of the sea urchin Lytechinus pictus includes a single muscle actin gene, LpM, and four cytoskeletal actin genes: LpC1, LpC2, LpC3, and LpC4. The origin and relationship of these actin genes to members of the actin gene family of the sea urchin Strongylocentrotus purpuratus were considered. Comparison of deduced amino acid sequences suggested a close relationship between LpC1 and the CyI-CyII subfamily of S. purpuratus actin genes, and between LpC2 and the CyIII subfamily of S. purpuratus actin genes; the muscle actin genes were orthologous. It is proposed that two divergent cytoskeletal actin genes of the common ancestral sea urchin gave rise by duplication to the extant cytoskeletal actin genes of these species, some of which have changed 3' noncoding sequences while others have maintained a terminus highly conserved among sea urchin actin genes.

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