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EC 1.1.98.6 Details
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EC number
1.1.98.6
Accepted name
ribonucleoside-triphosphate reductase (formate)
Reaction
ribonucleoside 5′-triphosphate + formate = 2′-deoxyribonucleoside 5′-triphosphate + CO2 + H2O
Other name(s)
nrdD (gene name), class III ribonucleoside-triphosphate reductase, anaerobic ribonucleotide reductase, anaerobic ribonucleoside-triphosphate reductase
Systematic name
ribonucleoside-5′-triphosphate:formate 2′-oxidoreductase
Comment
The enzyme, which is expressed in the bacterium Escherichia coli during anaerobic growth, contains an iron sulfur center. The active form of the enzyme contains an oxygen-sensitive glycyl (1-amino-2-oxoethan-1-yl) radical that is generated by the activating enzyme NrdG via chemistry involving S-adenosylmethionine (SAM) and a [4Fe-4S] cluster. The glycyl radical is involved in generation of a transient thiyl (sulfanyl) radical on a cysteine residue, which attacks the substrate, forming a ribonucleotide 3′-radical, followed by water loss to form a ketyl (α-oxoalkyl) radical. The ketyl radical gains an electron from a cysteine residue and a proton from formic acid, forming 3′-keto-deoxyribonucleotide and generating a thiosulfuranyl (1λ4-disulfan-1-yl) radical bridge between methionine and cysteine residues. Oxidation of formate by the thiosulfuranyl radical results in the release of CO2 and regeneration of the thiyl radical. cf. EC 1.17.4.1, ribonucleoside-diphosphate reductase and EC 1.17.4.2, ribonucleoside-triphosphate reductase (thioredoxin).
History
created 2017
EC Browser
1 Oxidoreductases (9574 organisms) download 3054352 sequences with EC number 1 in fasta format download 3054352 sequences with EC number 1 as tabstop The data in BRENDA allow the calculation or simulation of metabolic pathways by extracting the information of substrate/product chains and the corresponding kinetic data of the preceding and following enzymes in the Boehringer and KEGG metabolism (with the risk of including ?pathways? with non-natural compounds). version Download 2822 PDB numbers (EC 1) as tabstop separated file
1.1.99.15 created 1978, deleted 1980 show the reaction
1.1.99.17 created 1982, deleted 2003 show the reaction
1.21.1. undefined (18 organisms)
2 Transferases (6645 organisms) download 7349866 sequences with EC number 2 in fasta format download 7349866 sequences with EC number 2 as tabstop The data in BRENDA allow the calculation or simulation of metabolic pathways by extracting the information of substrate/product chains and the corresponding kinetic data of the preceding and following enzymes in the Boehringer and KEGG metabolism (with the risk of including ?pathways? with non-natural compounds). version Download 2822 PDB numbers (EC 2) as tabstop separated file
3 Hydrolases (11217 organisms) download 3878676 sequences with EC number 3 in fasta format download 3878676 sequences with EC number 3 as tabstop The data in BRENDA allow the calculation or simulation of metabolic pathways by extracting the information of substrate/product chains and the corresponding kinetic data of the preceding and following enzymes in the Boehringer and KEGG metabolism (with the risk of including ?pathways? with non-natural compounds). version Download 2822 PDB numbers (EC 3) as tabstop separated file
4 Lyases (5132 organisms) download 2266429 sequences with EC number 4 in fasta format download 2266429 sequences with EC number 4 as tabstop The data in BRENDA allow the calculation or simulation of metabolic pathways by extracting the information of substrate/product chains and the corresponding kinetic data of the preceding and following enzymes in the Boehringer and KEGG metabolism (with the risk of including ?pathways? with non-natural compounds). version Download 2822 PDB numbers (EC 4) as tabstop separated file
5 Isomerases (2096 organisms) download 1415170 sequences with EC number 5 in fasta format download 1415170 sequences with EC number 5 as tabstop The data in BRENDA allow the calculation or simulation of metabolic pathways by extracting the information of substrate/product chains and the corresponding kinetic data of the preceding and following enzymes in the Boehringer and KEGG metabolism (with the risk of including ?pathways? with non-natural compounds). version Download 2822 PDB numbers (EC 5) as tabstop separated file
6 Ligases (1554 organisms) download 2087965 sequences with EC number 6 in fasta format download 2087965 sequences with EC number 6 as tabstop The data in BRENDA allow the calculation or simulation of metabolic pathways by extracting the information of substrate/product chains and the corresponding kinetic data of the preceding and following enzymes in the Boehringer and KEGG metabolism (with the risk of including ?pathways? with non-natural compounds). version Download 2822 PDB numbers (EC 6) as tabstop separated file
7 Translocases (1092 organisms) download 2299998 sequences with EC number 7 in fasta format download 2299998 sequences with EC number 7 as tabstop The data in BRENDA allow the calculation or simulation of metabolic pathways by extracting the information of substrate/product chains and the corresponding kinetic data of the preceding and following enzymes in the Boehringer and KEGG metabolism (with the risk of including ?pathways? with non-natural compounds). version Download 2822 PDB numbers (EC 7) as tabstop separated file