|Citation||Emmons, R.B., Duncan, D., Duncan, I. (2007). Regulation of the Drosophila distal antennal determinant spineless. Dev. Biol. 302(2): 412--426. (Export to RIS)|
|Publication Type||Research paper|
|PubMed Abstract||The transformation of antenna to leg is a classical model for understanding segmental fate decisions in Drosophila. The spineless (ss) gene encodes a bHLH-PAS transcription factor that plays a key role in specifying the identity of distal antennal segments. In this report, we identify the antennal disc enhancer of ss and then use enhancer-lacZ reporters to work out how ss antennal expression is regulated. The antennal determinants Distal-less (Dll) and homothorax (hth) are key activators of the antennal enhancer. Dll is required continuously and, when present at elevated levels, can activate the enhancer in regions devoid of hth expression. In contrast, homothorax (hth) is required only transiently both for activation of the enhancer and for specification of the aristal portion of the antenna. The antennal enhancer is repressed by cut, which determines its proximal limit of expression, and by ectopic Antennapedia (Antp). Repression by Antp is not mediated by hth, suggesting that ss may be a direct target of Antp. Finally, we show that ss+ is not a purely passive target of its regulators: ss+ partially represses hth in the third antennal segment and lies upstream of Dll in the development of the maxillary palp primordia.|
What does this section display?
What does this section not display?
This section does not currently display links that were removed or gene model changes.
|All updates||Click here to see a list of all updates to this record from FB2010_08 and on.|
|Language of Publication||English|
|Additional Languages of Abstract|
|Also Published As|
|Data from Reference|
|Natural transposons (1)|
|Sequence features (17)|