EC Number |
Substrates |
Organism |
Products |
Reversibility |
---|
6.1.1.B3 | ATP + L-glutamate + tRNA |
acceptor is unfractionated RNA |
Escherichia coli |
AMP + diphosphate + L-glutamyl-tRNA |
the activation step of L-glutamate is tRNA-independent |
? |
6.1.1.B3 | ATP + L-glutamate + tRNAAsp |
- |
Shigella flexneri |
AMP + diphosphate + L-glutamyl-tRNAAsp |
- |
? |
6.1.1.B3 | ATP + L-glutamate + tRNAAsp |
- |
Escherichia coli |
AMP + diphosphate + L-glutamyl-tRNAAsp |
- |
? |
6.1.1.B3 | ATP + L-glutamate + tRNAAsp |
enzyme YadB activates glutamate in the absence of tRNA and transfers the activated glutamate not on tRNAGlu but instead on tRNAAsp. tRNAAsp is able to accept two amino acids: aspartate charged by aspartyl-tRNA synthetase and glutamate charged byYadB. YadB transfers the activated glutamate on the cyclopenthene-diol ring of the modified nucleoside queuosine posttranscriptionally inserted at the wobble position of the anticodon-loop to form glutamylqueuosine |
Escherichia coli |
AMP + diphosphate + L-glutamyl-tRNAAsp |
- |
? |
6.1.1.B3 | ATP + L-glutamate + tRNAAsp |
the enzyme glutamylates the queuosine Q34 nucleotide of the anticodon of tRNAAsp |
Escherichia coli |
AMP + diphosphate + L-glutamyl-tRNAAsp |
- |
? |
6.1.1.B3 | ATP + L-glutamate + tRNAAsp |
- |
Shigella flexneri 2457T / ATCC 700930 |
AMP + diphosphate + L-glutamyl-tRNAAsp |
- |
? |
6.1.1.B3 | more |
among Escherichia coli tRNAs containing queuosine in the wobble position, only tRNAAsp is substrate ofYadB. No substrate: D-glutamate |
Escherichia coli |
? |
- |
? |
6.1.1.B3 | more |
enzyme does not catalyse attachment of the activated L-glutamate to Escherichia coli tRNAGlu |
Escherichia coli |
? |
- |
? |
6.1.1.B3 | more |
Glu-Q-RS glutamylates the Q34 residue of the anticodon of tRNAAsp, hence it is a tRNA hypermodifying enzyme |
Escherichia coli |
? |
- |
? |
6.1.1.B3 | more |
the enzyme cannot aminoacylate tRNAGlu in vitro |
Escherichia coli |
? |
- |
? |