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- W1994964287 abstract "The Drosophila Groucho (Gro) protein is the prototype for a large family of corepressors , examples of which are found in most metazoans. This family includes the human transducin-like Enhancer of split (TLE) proteins. As corepressors, Gro/TLE family proteins do not bind to DNA directly, but rather are recruited to the template by DNA-bound repressor proteins . Gro/TLE family proteins are required for many developmental processes, including lateral inhibition, segmentation, sex determination, dorsal/ventral pattern formation, terminal pattern formation, and eye development. These proteins are characterized by a conserved N-terminal glutamine-rich domain and a conserved C-terminal WD-repeat domain. The primary role of the glutamine-rich domain is apparently to mediate tetramerization, while the WD-repeat domain may mediate interactions with DNA-bound repressors . The glutamine rich and WD-repeat domains are separated by a less conserved region containing domains that have been implicated in transcriptional repression and nuclear localization. In addition to encoding full-length Gro/TLE family proteins, most metazoan genomes encode truncated family members that contain the N-terminal oligomerization domain, but lack the C-terminal WD-repeat domain. These truncated proteins may negatively regulate full-length Gro/TLE proteins, perhaps by sequestering them in non-productive complexes. Gro/TLE family proteins probably repress transcription by multiple mechanisms. For example, a glycine/proline-rich domain in the central variable region functions to recruit the histone deacetylase Rpd3 to the template. This histone deacetylase then presumably silences transcription by altering local chromatin structure . Other repression domains in Gro may function in a histone deacetylase-independent manner. Many aspects of Gro/TLE protein function remain to be explored, including the possible post-translational regulation of Gro/TLE activity as well as the mechanisms by which Gro/TLE proteins direct repression at a distance." @default.
- W1994964287 created "2016-06-24" @default.
- W1994964287 creator A5016700682 @default.
- W1994964287 creator A5043827430 @default.
- W1994964287 date "2000-05-01" @default.
- W1994964287 modified "2023-09-30" @default.
- W1994964287 title "Groucho/TLE family proteins and transcriptional repression" @default.
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