Protein
Histone-lysine N-methyltransferase E(z)
Organism
Drosophila melanogaster
Function
Polycomb group (PcG) protein. Catalytic subunit of the Esc/E(z) complex, which methylates 'Lys-9' and 'Lys-27' of histone H3, leading to transcriptional repression of the affected target gene. While PcG proteins are generally required to maintain the transcriptionally repressive state of homeotic genes throughout development, this protein is specifically required during the first 6 hours of embryogenesis to establish the repressed state. The Esc/E(z) complex is necessary but not sufficient for the repression of homeotic target genes, suggesting that the recruitment of the distinct PRC1 complex is also required.
Similarity
Belongs to the class V-like SAM-binding methyltransferase superfamily. Histone-lysine methyltransferase family. EZ subfamily.
Sequence
MNSTKVPPEWKRRVKSEYIKIRQQKRYKRADEIKEAWIRNWDEHNHNVQDLYCESKVWQAKPYDPPHVDCVKRAEVTSYNGIPSGPQKVPICVINAVTPIPTMYTWAPTQQNFMVEDETVLHNIPYMGDEVLDKDGKFIEELIKNYDGKVHGDKDPSFMDDAIFVELVHALMRSYSKELEEAAPGTATAIKTETLAKSKQGEDDGVVDVDADGESPMKLEKTDSKGDLTEVEKKETEEPLETEDADVKPDVEEVKDKLPFPAPIIFQAISANFPDKGTAQELKEKYIELTEHQDPERPQECTPNIDGIKAESVSRERTMHSFHTLFCRRCFKYDCFLHRLQGHAGPNLQKRRYPELKPFAEPCSNSCYMLIDGMKEKLAADSKTPPIDSCNEASSEDSNDSNSQFSNKDFNHENSKDNGLTVNSAAVAEINSIMAGMMNITSTQCVWTGADQALYRVLHKVYLKNYCAIAHNMLTKTCRQVYEFAQKEDAEFSFEDLRQDFTPPRKKKKKQRLWSLHCRKIQLKKDSSSNHVYNYTPCDHPGHPCDMNCSCIQTQNFCEKFCNCSSDCQNRFPGCRCKAQCNTKQCPCYLAVRECDPDLCQACGADQFKLTKITCKNVCVQRGLHKHLLMAPSDIAGWGIFLKEGAQKNEFISEYCGEIISQDEADRRGKVYDKYMCSFLFNLNNDFVVDATRKGNKIRFANHSINPNCYAKVMMVTGDHRIGIFAKRAIQPGEELFFDYRYGPTEQLKFVGIEREMEIV