Send to

Choose Destination
Dev Biol. 2006 Dec 1;300(1):74-89. Epub 2006 Aug 22.

Identification and characterization of homeobox transcription factor genes in Strongylocentrotus purpuratus, and their expression in embryonic development.

Author information

Division of Biology, California Institute of Technology, Pasadena, CA 91125, USA.


A set of 96 homeobox transcription factors was identified in the Strongylocentrotus purpuratus genome using permissive blast searches with a large collection of authentic homeodomain sequences from mouse, human and fly. A phylogenetic tree was constructed to compare the sea urchin homeobox gene family to those of vertebrates, with the result that with the only a few exceptions, orthologs of all vertebrate homeodomain genes were uncovered by our search. QPCR time course measurements revealed that 65% of these genes are expressed within the first 48 h of development (late gastrula). For genes displaying sufficiently high levels of transcript during the first 24 h of development (late blastula), whole mount in situ hybridization was carried out up to 48 h to determine spatial patterns of expression. The results demonstrate that homeodomain transcription factors participate in multiple and diverse developmental functions, in that they are used at a range of time points and in every territory of the developing embryo.

[Indexed for MEDLINE]
Free full text

Supplemental Content

Full text links

Icon for Elsevier Science
Loading ...
Support Center