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ECB-ART-32175
Nucleic Acids Res 1988 Dec 23;1624:11543-58. doi: 10.1093/nar/16.24.11543.
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Stage- and tissue-specific expression of two homeo box genes in sea urchin embryos and adults.

Dolecki GJ , Wang G , Humphreys T .


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We report the isolation of two different homeo box genes, HB3 and HB4, from the Hawaiian sea urchin Tripneustes gratilla. DNA sequencing revealed a definitive Antennapedia (Antp) class homeo box in each gene. Southern transfer hybridizations showed the genes to be single-copy. A 5.7-kb transcript of the HB3 gene was found in ovary, testis, small intestine and gastrula poly(A)+ RNA. The HB4 gene produces three transcripts. A 3.7-kb and a 4.4-kb transcript are expressed during embryogenesis. A 3.5-kb transcript appears in each of the adult tissues studied. The HB4 gene appears to be the sea urchin cognate of the Drosophila infrabdominal-7 (iab-7) gene, the mouse Hox 1.7 and Hox 3.2 genes and the Xenopus X1Hbox 6 gene. An examination of Antp class homeo box genes in deuterostomes indicates that a chromosomal duplication has taken place in the evolutionary line leading to the vertebrates after the divergence of the echinoderms. Thus, the sea urchin represents the primitive condition.

???displayArticle.pubmedLink??? 2905443
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Genes referenced: LOC100887844

References [+] :
Biggin, Buffer gradient gels and 35S label as an aid to rapid DNA sequence determination. 1983, Pubmed