label: histone H3K79 trimethyltransferase activity
label_lc: histone h3k79 trimethyltransferase activity
description: "Catalysis of the reaction: L-lysyl79-[histone H3] + 3 S-adenosyl-L-methionine = 3 H+ + N6,N6,N6-trimethyl-L-lysyl79-[histone H3] + 3 S-adenosyl-L-homocysteine. This reaction is the successive addition of up to three methyl group to the lysine residue at position 79 of the histone H3 protein, producing H3K79me3."