NDLI: Gene structure and larval expression of cnox-2Am from the coral Acropora millepora

Content Provider	Springer Nature Link
Author	C. Hayward, David Catmull, Julian Reece Hoyes, John S. Berghammer, Heinrich Dodd, Heather Hann, Steven J. Miller, David J. Ball, Eldon E.
Copyright Year	2001
Abstract	We have cloned a Hox-like gene, cnox-2Am, from a staghorn coral, Acropora millepora, an anthozoan cnidarian, and characterised its embryonic and larval expression. cnox-2Am and its orthologs in other cnidarians and Trichoplax most closely resemble the Gsx and, to a lesser extent, Hox 3/4 proteins. Developmental northern blots and in situ hybridisation are consistent in showing that cnox-2Am message appears in the planula larva shortly after the oral/aboral axis is formed following gastrulation. Expression is localised in scattered ectodermal cells with a restricted distribution along the oral/aboral body axis. They are most abundant along the sides of the cylindrical larva, rare in the oral region and absent from the aboral region. These cells, which on morphological grounds we believe to be neurons, are of two types; one tri-or multipolar near the basement membrane and a second extending projections in both directions from a mid-ectodermal nucleus. Anti-RFamide staining reveals neurons with a similar morphology to the cnox-2Am-expressing cells. However, RFamide-expressing neurons are more abundant, especially at the aboral end of the planula, where there is no cnox-2Am expression. The pattern of expression of cnox-2Am resembles that of Gsx orthologs in Drosophila and vertebrates in being expressed in a spatially restricted portion of the nervous system.
Starting Page	10
Ending Page	19
Page Count	10
File Format	PDF
ISSN	0949944X
Journal	Development Genes and Evolution
Volume Number	211
Issue Number	1
e-ISSN	1432041X
Language	English
Publisher	Springer-Verlag
Publisher Date	2014-01-31
Publisher Place	Berlin, Heidelberg
Access Restriction	One Nation One Subscription (ONOS)
Subject Keyword	Developmental Biology Neurosciences Cell Biology Biochemistry Animal Genetics and Genomics
Content Type	Text
Resource Type	Article
Subject	Genetics Developmental Biology

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