TITLE

Molecular Characterization of TgHBox4, a Drosophila Abd-B Homolog Found in the Sea Urchin Tripneustes gratilla

AUTHOR(S)
Vansant, Gordon; Humphreys, Tom
PUB. DATE
February 2000
SOURCE
DNA & Cell Biology;Feb2000, Vol. 19 Issue 2, p131
SOURCE TYPE
Academic Journal
DOC. TYPE
Article
ABSTRACT
We have isolated and sequenced a cDNA clone that, as judged by the sequence of the homeobox region, encodes a sea urchin homolog of the homeobox containing the gene Abdominal-B of Drosophila . The total length of the cDNA is 3634 nucleotides and includes an open reading frame, which encodes a protein that is 32,321 Da. The N-terminal region of the homeodomain includes consensus sequences found in some of TgHBox4's Abdominal-B relatives. A genomic clone representing the 5 part of the message was also isolated. This clone and a previously isolated clone were found to represent the full-length cDNA sequence. We have also raised antibodies against a bacterially expressed portion of the TgHBox4 protein and used them to determine the location of TgHBox4 proteins during development. The protein displays ubiquitous expression early in development but becomes more restricted, to posterior regions, late in embryogenesis. Thus, in contrast to its Abd-B homologs in bilateral metazoans, TgHBox4 is probably not involved in pattern formation but may have a posterior-defining role late in embryogenesis.
ACCESSION #
5322771

 

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