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pho | Polycomb protein PHO; Polycomb group (PcG) protein that binds to the 5'- CNGCCATNNNNG-3' sequence found in the regulatory regions of many genes. 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. Probably targets the Esc/E(z) complex to DNA. Necessary but no [...] (520 aa) | ||||
Hs2st | Heparan sulfate 2-O-sulfotransferase (Hs2st) encodes a heparan sulfate modifying enzyme, which transfers a sulfate group to 2-O position of glucuronic or iduronic acid residues of heparan sulfate. Loss of Hs2st function eliminates 2-O sulfation, but increases 6-O sulfation performed by the product of Hs6st. Simultaneous elimination of Hs6st and Hs2st functions disrupts FGF, Wg and Dpp signaling pathways. (349 aa) |