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The homeodomain of Tinman mediates homo- and heterodimerization of NK proteins.

Abstract：

:Cardiac development requires the action of transcription factors, which control the specification and differentiation of cardiac cell types. One of these factors, encoded by the homeobox gene tinman (tin), is essential for the specification of all cardiac cells in Drosophila. An increasing number of examples show that protein-protein interactions can be important for determining the specific transcriptional activities of homeodomain proteins, in addition to their binding to specific DNA target sites. Here, we show that Tin and Bagpipe (Bap), another homeodomain protein, form homo- and heterodimeric complexes. We demonstrate that homo- and heterodimerization of Tin is mediated through its homeodomain and that the region required for this interaction corresponds to the first two helices that are also necessary for DNA binding. We further show that, in the yeast system, the homeodomain can function as a transcriptional repressor domain. These findings suggest that protein-protein interactions of Tin play a role in its transcriptional and developmental functions.

journal_name

Biochem Biophys Res Commun

journal_title

Biochemical and biophysical research communications

authors

Zaffran S,Frasch M

doi

10.1016/j.bbrc.2005.06.090

subject

Has Abstract

pub_date

2005-08-26 00:00:00

pages

361-9

issue

2

eissn

0006-291X

issn

1090-2104

pii

S0006-291X(05)01323-9

journal_volume

334

pub_type

杂志文章

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