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Hox genes in the antarctic polyplacophoran Nuttallochiton mirandus

✍ Scribed by Maria Assunta Biscotti; Adriana Canapa; Ettore Olmo; Marco Barucca

Publisher
John Wiley and Sons
Year
2007
Tongue
English
Weight
160 KB
Volume
308B
Category
Article
ISSN
1552-5007

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✦ Synopsis

Abstract

Hox genes are conserved across all bilaterians and encode transcription factors involved in the formation of the anteroposterior axis during embryo development. Differences in homeotic gene evolution have been observed not only between deuterostomes and protostomes, but also between the two large protostome clades, Ecdysozoa and Lophotrochozoa.

Among lophotrochozoans, the phylum Mollusca displays high diversity of body plans, ranging from the wormlike appearance of aplacophorans to the complex body plan of cephalopods. Using a PCR‐based method, we were able to identify eight Hox genes in the polyplacophoran Nuttallochiton mirandus, two orthologous to the anterior class (lab, pb), four to the central class (Scr, Lox5, Antp, Lox2) and two to the posterior class (Post‐1, Post‐2). Comparison with the results obtained in other molluscs seems to confirm the conservation of Hox genes in this phylum in terms of both presence and characteristics. J. Exp. Zool. (Mol. Dev. Evol.) 308B:507–513, 2007. Β© 2007 Wiley‐Liss, Inc.

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