Full name: Ribosomal RNA small subunit methyltransferase A
Synonym: At5g66360
GI: 42573814
Orf: AT5G66360
COG: COG0030
UniProt: Q9FK02
Structures: | |
Enzyme type: methyltransferase
Position of modification - modification: s:1914(1518) - m6,6A
s:1915(1519) - m6,6A


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.

Protein sequence:



Title Authors Journal Details PubMed Id DOI
Comprehensive phylogenetic analysis of evolutionarily conserved rRNA adenine dimethyltransferase suggests diverse bacterial contributions to the nucleus-encoded plastid proteome. Park AK, Kim H, Jin HJ Mol Phylogenet Evol [details] 19017544 -
A mitochondrial rRNA dimethyladenosine methyltransferase in Arabidopsis. Richter U, Kuhn K, Okada S, Brennicke A, Weihe A, Borner T Plant J [details] 19929881 -



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