EC Number |
Substrates |
Organism |
Products |
Reversibility |
---|
1.5.3.10 | more |
bifunctional enzyme catalyzing the formation of 5,10-methylene tetrahydrofolate and the oxidation of N,N-dimethylglycine, folate binding and active site, a large channel connects both active sites, the channeling is kinetically controlled by terahydrofolate binding, overview |
Arthrobacter globiformis |
? |
- |
? |
1.5.3.10 | N,N-dimethylglycine + 5,6,7,8-tetrahydrofolate + O2 |
- |
Arthrobacter globiformis |
sarcosine + 5,10-methylenetetrahydrofolate + H2O2 |
- |
? |
1.5.3.10 | N,N-dimethylglycine + H2O + O2 |
- |
Arthrobacter globiformis |
sarcosine + formaldehyde + H2O2 |
- |
? |
1.5.3.10 | N,N-dimethylglycine + H2O + O2 |
- |
Cylindrocarpon didymum |
sarcosine + formaldehyde + H2O2 |
- |
? |
1.5.3.10 | N,N-dimethylglycine + H2O + O2 |
involved in tetrahydrofolate-dependent assimilation of methyl groups |
Arthrobacter globiformis |
sarcosine + formaldehyde + H2O2 |
- |
? |
1.5.3.10 | N,N-dimethylglycine + H2O + O2 |
the oxidation of dimethylglycine is coupled to the synthesis of 5,10-methylenetetrahydrofolate through an unusual substrate channeling mechanism. Uncoupling of the active sites can be achieved by mutagenesis or deletion of the 5,10-methylenetetrahydrofolate synthase site and this leads to accumulation of intracellular formaldehyde. Channeling occurs by nonbiased diffusion of the labile intermediate through a large solvent cavity connecting both active sites |
Arthrobacter globiformis |
sarcosine + formaldehyde + H2O2 |
- |
? |
1.5.3.10 | N,N-dimethylglycine + H2O + O2 |
In the absence of tetrahydrofolate, formaldehyde is the second product of catalysis, formed by hydrolysis of a labile iminium intermediate. In the cell, toxic formaldehyde is not produced and these enzymes catalyse the formation of 5,10-methylene-THF from THF and the labile iminium intermediate. |
Arthrobacter globiformis |
sarcosine + formaldehyde + H2O2 |
- |
? |
1.5.3.10 | N,N-dimethylglycine + H2O + O2 |
- |
Cylindrocarpon didymum M-1 |
sarcosine + formaldehyde + H2O2 |
- |
? |
1.5.3.10 | N,N-dimethylglycine + H2O + O2 |
- |
Arthrobacter globiformis NRRL B-2979 |
sarcosine + formaldehyde + H2O2 |
- |
? |