Journal
DEVELOPMENTAL BIOLOGY
Volume 286, Issue 1, Pages 158-168Publisher
ACADEMIC PRESS INC ELSEVIER SCIENCE
DOI: 10.1016/j.ydbio.2005.07.017
Keywords
six-co-factors; Drl; So(Drl); So(D); dominant negative; Six3; Six6; Six1; Six2
Categories
Funding
- NEI NIH HHS [P30EY14104, R01 EY13167, R01 EY013167] Funding Source: Medline
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The development of the Drosophila visual system utilizes two members of the highly conserved Six-Homeobox family of transcription factor, Sine oculis and Optix. Although in vitro studies have detected differences in DNA-binding and interactions with some co-factors, questions remain as to what extent the activity for these two transcriptional regulators is redundant or specific in vivo. In this work, we show that the So(D) mutation within the Six domain does not abolish DNA-protein interactions, but alters co-factor binding specificity to resemble that of Optix. A mutation in the same region of Optix alters its activity in vivo. We propose that the dominant mutant phenotype is primarily due to an alteration in binding properties of the Sine oculis protein and that distinct partner interactions is one important mechanism in determining significant functional differences between these highly conserved factors during eye development. (c) 2005 Elsevier Inc. All rights reserved.
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