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Scm | Polycomb protein Scm; Polycomb group (PcG) protein. PcG proteins act by forming multiprotein complexes, which are required to maintain the transcriptionally repressive state of homeotic genes throughout development. PcG proteins are not required to initiate repression, but to maintain it during later stages of development. They probably act via the methylation of histones, rendering chromatin heritably changed in its expressibility; Belongs to the SCM family. (877 aa) | ||||
trr | Histone-lysine N-methyltransferase trr; Histone methyltransferase that acts as a coactivator for the ecdysone receptor during development. Specifically trimethylates 'Lys- 4' of histone H3, a specific tag for epigenetic transcriptional activation. Recruited by EcR in an ecdysone-dependent manner causing H3 'Lys-4' trimethylation at ecdysone-inducible promoters, leading to activate expression. Plays a central role in the developing compound eye, during the progression of the morphogenetic furrow and in post- furrow differentiation of the retinal epithelium, notably by activating express [...] (2431 aa) |