Modomics - A Database of RNA Modifications

Full name: t(6)A37 threonylcarbamoyladenosine biosynthesis protein QRI7
Synonym: OSGEPL, YDL104C
GI: 6320099
Orf: D2366
COG: COG0533
UniProt: P43122
Structures: | 3WUH |
Enzyme type: threonylcarbamoyltransferase
Position of modification - modification: t:37 - t6A


This protein is the mitochondrial paralog of cytoplasmic Kae1 and ortholog of bacterial TsaD (YgjD). Required for the formation of a threonylcarbamoyl group on adenosine at position 37 (t6A37) in mitochondrial tRNAs that read codons beginning with adenine. Qri7 alone is sufficient to catalyze the transfer of the threonyl-carbamoyl group to adenine 37 of tRNA, whereas the Qri7 homologues YgjD (in bacteria) and Kae1 (in archaea and eukaryotes) function as parts of multi-protein complexes.

Protein sequence:



Title Authors Journal Details PubMed Id DOI
A role for the universal Kae1/Qri7/YgjD (COG0533) family in tRNA modification. El Yacoubi B, Hatin I, Deutsch C, Kahveci T, Rousset JP, Iwata-Reuyl D, Murzin AG, de Crecy-Lagard V EMBO J [details] 21285948 -
Qri7/OSGEPL, the mitochondrial version of the universal Kae1/YgjD protein, is essential for mitochondrial genome maintenance. Oberto J, Breuil N, Hecker A, Farina F, Brochier-Armanet C, Culetto E, Forterre P Nucleic Acids Res [details] 19578062 -
Structure of Saccharomyces cerevisiae mitochondrial Qri7 in complex with AMP. Tominaga T, Kobayashi K, Ishii R, Ishitani R, Nureki O... Acta Crystallogr F Struct Biol Commun [details] 25084372 -



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