The nuclear genome of Arabidopsis thaliana encodes three dimethylase/mtTFB-like proteins, one of which is Dim1B. The gene product is imported into mitochondria and catalyzes the formation of two adjacent dimethylated residues (m6,6A, positions 1518 and 1519; E. coli numberings) in the loop of a conserved hairpin near the 3'-end of small subunit rRNA. AdoMet is the methyl group donor.
Comprehensive phylogenetic analysis of evolutionarily conserved rRNA adenine dimethyltransferase suggests diverse bacterial contributions to the nucleus-encoded plastid proteome.
A mitochondrial rRNA dimethyladenosine methyltransferase in Arabidopsis.
Comprehensive phylogenetic analysis of evolutionarily conserved rRNA adenine dimethyltransferase suggests diverse bacterial contributions to the nucleus-encoded plastid proteome.