EC Number |
Substrates |
Organism |
Products |
Reversibility |
---|
2.1.1.213 | 2 S-adenosyl-L-methionine + guanine10 in tRNA |
depending on the experimental conditions used, as well as the tRNA substrate tested, the enzymatic reaction leads to the formation of either N2-methyl or N2-dimethylguanosine. N2-Dimethylguanine10 accumulates during incubation at 50°C, whereas the formation of N2-methylguanine10 appears to be a transient intermediate. At 30°C, N2-dimethylguanine10 is efficiently formed, whereas the formation of N2-methylguanine10 is considerably slowed compared with that at higher temperatures |
Pyrococcus abyssi |
2 S-adenosyl-L-homocysteine + N2-dimethylguanine10 in tRNA |
- |
? |
2.1.1.213 | 2 S-adenosyl-L-methionine + guanine10 in tRNA |
identity elements required for the efficient formation of N2-dimethylguanine10: uracil25 and a V-loop of four nucleotides are major determinants for the formation of N2-dimethylguanine10, whereas the identity of the 13-22 base-pair clearly influences the rate of N2-dimethylguanine10 formation. The integrity of the T-arm prolonged with the amino acid acceptor stem is an important structural element for the dimethylation step catalysed by PabTrm-m2 2G10 enzyme |
Pyrococcus abyssi |
2 S-adenosyl-L-homocysteine + N2-dimethylguanine10 in tRNA |
- |
? |
2.1.1.213 | more |
model for a potential binding mode for the THUMP domain, which may be common to various RNA modification enzymes that specifically modify nucleotides in the 3D-core of the tRNA molecule |
Pyrococcus abyssi |
? |
- |
? |
2.1.1.213 | S-adenosyl-L-methionine + guanine10 in tRNA |
- |
Pyrococcus abyssi |
S-adenosyl-L-homocysteine + N2-methylguanine10 in tRNA |
- |
? |
2.1.1.213 | S-adenosyl-L-methionine + guanine10 in tRNA |
depending on the experimental conditions used, as well as the tRNA substrate tested, the enzymatic reaction leads to the formation of either N2-methyl or N2-dimethylguanosine. N2-Dimethylguanine10 accumulates during incubation at 50°C, whereas the formation of N2-methylguanine10 appears to be a transient intermediate. At 30°C, N2-dimethylguanine10 is efficiently formed, whereas the formation of N2-methylguanine10 is considerably slowed compared with that at higher temperatures |
Pyrococcus abyssi |
S-adenosyl-L-homocysteine + N2-methylguanine10 in tRNA |
- |
? |