The MLL complex methylates histone 3 at lysine 4 -H3K4) to upregulate transcription. MLL1 is the catalytic subunit which exhibits a low basal methyltransferase activity. Addition of WDR5, Ash2L, and RbBP5 -WAR) enhances Histone H3K4 methylation 300-fold; an additional 2-fold activation has been reported for the addition of DPY-30 -Item No. 11178 and Item No. 10945). The MLL core complex colocalizes with RNA Polymerase II on chromosomes and is involved in the transition of paused Pol II to actively-transcribing Pol II. Misregulation of MLL1 by fusion of its non-catalytic N-terminus to any of >50 other proteins leads to leukemia, possibly due to release of paused Pol II at developmentally important sites such as the Hox family of genes. Wild-type MLL1 is targeted to Hox genes through interactions with menin, and is thus important for proper development.,The Cayman MLL1/WAR complex is supplied as four tubes. Combining the four tubes will result in an equimolar ratio of MLL1, WDR5, Ash2L, and RbBP5.
產(chǎn)品描述
Source: Active recombinant proteins expressed in E. coli