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Your query returned 2 entries. Printable version
EC | 2.5.1.75 | ||||||||||
Accepted name: | tRNA dimethylallyltransferase | ||||||||||
Reaction: | prenyl diphosphate + adenosine37 in tRNA = diphosphate + N6-(3-methylbut-2-en-1-yl)-adenosine37 in tRNA | ||||||||||
For diagram of N6-(Dimethylallyl)adenosine37 modified tRNA biosynthesis, click here | |||||||||||
Glossary: | N6-(3-methylbut-2-en-1-yl)-adenine37 in tRNA = N6-dimethylallyladenine37 in tRNA | ||||||||||
Other name(s): | tRNA prenyltransferase; MiaA; transfer ribonucleate isopentenyltransferase (incorrect); Δ2-isopentenyl pyrophosphate:tRNA-Δ2-isopentenyl transferase (incorrect); Δ2-isopentenyl pyrophosphate:transfer ribonucleic acid Δ2-isopentenyltransferase (incorrect); dimethylallyl-diphosphate: tRNA dimethylallyltransferase; dimethylallyl-diphosphate:adenine37 in tRNA dimethylallyltransferase | ||||||||||
Systematic name: | prenyl-diphosphate:adenine37 in tRNA prenyltransferase | ||||||||||
Comments: | Formerly known as tRNA isopentenyltransferase, but it is now known that prenyl diphosphate, rather than isopentenyl diphosphate, is the substrate. | ||||||||||
Links to other databases: | BRENDA, EXPASY, KEGG, MetaCyc, PDB | ||||||||||
References: |
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EC | 2.8.4.3 | ||||||||||
Accepted name: | tRNA-2-methylthio-N6-dimethylallyladenosine synthase | ||||||||||
Reaction: | N6-(3-methylbut-2-en-1-yl)-adenine37 in tRNA + sulfur-(sulfur carrier) + 2 S-adenosyl-L-methionine + reduced electron acceptor = N6-(3-methylbut-2-en-1-yl)-2-(methylsulfanyl)adenine37 in tRNA + S-adenosyl-L-homocysteine + (sulfur carrier) + L-methionine + 5′-deoxyadenine + electron acceptor (overall reaction) (1a) N6-(3-methylbut-2-en-1-yl)-adenine37 in tRNA + sulfur-(sulfur carrier) + S-adenosyl-L-methionine + reduced electron acceptor = N6-(3-methylbut-2-en-1-yl)-2-thioadenine37 in tRNA + (sulfur carrier) + L-methionine + 5′-deoxyadenine + electron acceptor (1b) S-adenosyl-L-methionine + N6-(3-methylbut-2-en-1-yl)-2-thioadenine37 in tRNA = S-adenosyl-L-homocysteine + N6-(3-methylbut-2-en-1-yl)-2-(methylsulfanyl)adenine37 in tRNA |
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For diagram of N6-(dimethylallyl)adenosine37 modified tRNA biosynthesis, click here | |||||||||||
Glossary: | N6-(3-methylbut-2-en-1-yl)-adenine37 in tRNA = N6-dimethylallyladenine37 in tRNA | ||||||||||
Other name(s): | MiaB; 2-methylthio-N-6-isopentenyl adenosine synthase; tRNA-i6A37 methylthiotransferase; tRNA (N6-dimethylallyladenosine37):sulfur-(sulfur carrier),S-adenosyl-L-methionine C2-methylthiotransferase | ||||||||||
Systematic name: | tRNA N6-(3-methylbut-2-en-1-yl)-adenine37:sulfur-(sulfur carrier),S-adenosyl-L-methionine C2-(methylsulfanyl)transferase | ||||||||||
Comments: | This bacterial enzyme binds two [4Fe-4S] clusters as well as the transferred sulfur [3]. The enzyme is a member of the superfamily of S-adenosyl-L-methionine-dependent radical (radical AdoMet) enzymes. The sulfur donor is believed to be one of the [4Fe-4S] clusters, which is sacrificed in the process, so that in vitro the reaction is a single turnover. The identity of the electron donor is not known. | ||||||||||
Links to other databases: | BRENDA, EXPASY, KEGG, MetaCyc, PDB | ||||||||||
References: |
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