Molecular Weight [Da] | Molecular Weight Maximum [Da] | Comment | Organism |
---|---|---|---|
41000 | - |
x * 41000, SDS-PAGE | Camellia sinensis |
61000 | - |
gel filtration | Camellia sinensis |
Natural Substrates | Organism | Comment (Nat. Sub.) | Natural Products | Comment (Nat. Pro.) | Rev. | Reac. |
---|---|---|---|---|---|---|
additional information | Camellia sinensis | the bifunctional enzyme catalyzes the last two steps of the caffeine biosynthesis | ? | - |
? | |
S-adenosyl-L-methionine + 3,7-dimethylxanthine | Camellia sinensis | reaction of EC 2.1.1.160 | S-adenosyl-L-homocysteine + 1,3,7-trimethylxanthine | i.e. caffeine | ? | |
S-adenosyl-L-methionine + 7-methylxanthine | Camellia sinensis | - |
S-adenosyl-L-homocysteine + 3,7-dimethylxanthine | i.e. theobromine | ? |
Organism | UniProt | Comment | Textmining |
---|---|---|---|
Camellia sinensis | - |
bifunctional enzyme | - |
Purification (Comment) | Organism |
---|---|
native enzyme 523fold from young, developing leaves by ammonium sulfate fractionation, hydroxylapatite, anion exchange, and adenosine affinity chromatography, and gel filtration to homogeneity | Camellia sinensis |
Source Tissue | Comment | Organism | Textmining |
---|---|---|---|
leaf | young, developing | Camellia sinensis | - |
Specific Activity Minimum [µmol/min/mg] | Specific Activity Maximum [µmol/min/mg] | Comment | Organism |
---|---|---|---|
95 | - |
purified enzyme | Camellia sinensis |
Substrates | Comment Substrates | Organism | Products | Comment (Products) | Rev. | Reac. |
---|---|---|---|---|---|---|
additional information | the bifunctional enzyme catalyzes the last two steps of the caffeine biosynthesis | Camellia sinensis | ? | - |
? | |
additional information | substrate specificity, overview, the bifunctional enzyme also catalyzes the reaction of the caffeine synthase, EC 2.1.1.160, no activity with xanthosine, xanthosine 5-phosphate, and theophylline | Camellia sinensis | ? | - |
? | |
S-adenosyl-L-methionine + 1-methylxanthine | low activity | Camellia sinensis | S-adenosyl-L-homocysteine + 1,3-dimethylxanthine | i.e. theophylline | ? | |
S-adenosyl-L-methionine + 3,7-dimethylxanthine | reaction of EC 2.1.1.160 | Camellia sinensis | S-adenosyl-L-homocysteine + 1,3,7-trimethylxanthine | i.e. caffeine | ? | |
S-adenosyl-L-methionine + 3-methylxanthine | low activity | Camellia sinensis | S-adenosyl-L-homocysteine + 1,3-dimethylxanthine | i.e. theophylline | ? | |
S-adenosyl-L-methionine + 7-methylxanthine | - |
Camellia sinensis | S-adenosyl-L-homocysteine + 3,7-dimethylxanthine | i.e. theobromine | ? | |
S-adenosyl-L-methionine + paraxanthine | best substrate | Camellia sinensis | S-adenosyl-L-homocysteine + 1,3,7-trimethylxanthine | i.e. caffeine | ? |
Subunits | Comment | Organism |
---|---|---|
monomer or dimer | x * 41000, SDS-PAGE | Camellia sinensis |
pH Optimum Minimum | pH Optimum Maximum | Comment | Organism |
---|---|---|---|
8.5 | - |
sharp optimum | Camellia sinensis |
pH Minimum | pH Maximum | Comment | Organism |
---|---|---|---|
additional information | - |
pH profile | Camellia sinensis |