histone H3K9me2 methyltransferase activity
Catalysis of the reaction: N6,N6-dimethyl-L-lysyl9-[histone H3] + S-adenosyl-L-methionine = H+ + N6,N6,N6-trimethyl-L-lysyl9-[histone H3] + S-adenosyl-L-homocysteine. This reaction is the addition of a single methyl group to the dimethylated lysine residue at position 9 of histone H3, producing histone H3K9me3.
GO:0046974
histone H3K9 methyltransferase activity
is_a
histone H3-K9 trimethylation
broad
histone H3K9 trimethylation
broad
histone H3K9me2 methylase activity
exact
histone dimethyl-lysine(H3K9) N-methyltransferase activity (H3-K9 specific)
exact
SPBC428.08c