18S rRNA (adenine1779-N6/adenine1780-N6)-dimethyltransferase

18S rRNA (adenine¹⁷⁷⁹-N⁶/adenine¹⁷⁸⁰-N⁶)-dimethyltransferase (EC 2.1.1.183, 18S rRNA dimethylase Dim1p, Dim1p, ScDim1, m2(6)A dimethylase, KIDIM1) is an enzyme with systematic name S-adenosyl-L-methionine:18S rRNA (adenine¹⁷⁷⁹-N⁶/adenine¹⁷⁸⁰-N6)-dimethyltransferase.^{[1][2][3][4][5]} This enzyme catalyses the following chemical reaction

4

S-adenosyl-L-methionine + adenine¹⁷⁷⁹/adenine¹⁷⁸⁰ in 18S rRNA

${\displaystyle \rightleftharpoons }$ 4

S-adenosyl-L-homocysteine

+ N⁶-dimethyladenine¹⁷⁷⁹/N⁶-dimethyladenine¹⁷⁸⁰ in 18S rRNA