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Homeoboxes in cnidarians

✍ Scribed by Schierwater, Bernd ;Murtha, Michael ;Dick, Matthew ;Ruddle, Frank H. ;Buss, Leo W.

Publisher
John Wiley and Sons
Year
1991
Tongue
English
Weight
409 KB
Volume
260
Category
Article
ISSN
0022-104X

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✦ Synopsis

Abstract

Homeoboxes have previously been documented from various phyla of triploblastic, coelomate and pseudocoelomate, animals. We report here the first homeoboxes from cnidarians, a phylum of diploblastic organisms thought to occupy a near‐basal position in metazoan phylogeny. We have sequenced three partial (77 bp) fragments of Antennapedia (Antp) class homeoboxes from the hydroids Hydractinia symbiolongicarpus and Eleutheria dichotoma. A pair of fragments, Cnox‐2‐Hs and Cnox‐2‐Ed, from the two species differ in nucleotide sequences but have identical derived amino acid sequences. A gene tree produced by parsimony analysis shows that these two fragments cluster within the Antp homeobox lineage. The third fragment, Cnox‐1, clusters as a sister group of the other Antp class homeoboxes.

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