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Literature summary for 2.1.1.137 extracted from

  • Ye, J.; Chang, Y.; Yan, Y.; Xiong, J.; Xue, X.M.; Yuan, D.; Sun, G.X.; Zhu, Y.G.; Miao, W.
    Identification and characterization of the arsenite methyltransferase from a protozoan, Tetrahymena pyriformis (2014), Aquat. Toxicol., 149, 50-57.
    View publication on PubMed

Cloned(Commentary)

Cloned (Comment) Organism
expressed in Escherichia coli DH5alpha and AW3110 cells Tetrahymena pyriformis

Molecular Weight [Da]

Molecular Weight [Da] Molecular Weight Maximum [Da] Comment Organism
30000
-
x * 30000, His-tagged enzyme, SDS-PAGE Tetrahymena pyriformis
35400
-
x * 35400, His-tagged enzyme, calculated from amino acid sequence Tetrahymena pyriformis

Natural Substrates/ Products (Substrates)

Natural Substrates Organism Comment (Nat. Sub.) Natural Products Comment (Nat. Pro.) Rev. Reac.
additional information Tetrahymena pyriformis besides methylarsonate and dimethylarsinate, the enzyme also produces trimethylarsenite and dimethylarsine gases ?
-
?
S-adenosyl-L-methionine + arsenite Tetrahymena pyriformis
-
S-adenosyl-L-homocysteine + methylarsonate
-
?
S-adenosyl-L-methionine + methylarsonite Tetrahymena pyriformis
-
S-adenosyl-L-homocysteine + dimethylarsinate
-
?

Organism

Organism UniProt Comment Textmining
Tetrahymena pyriformis
-
-
-

Purification (Commentary)

Purification (Comment) Organism
HisTrap column chromatography Tetrahymena pyriformis

Substrates and Products (Substrate)

Substrates Comment Substrates Organism Products Comment (Products) Rev. Reac.
additional information besides methylarsonate and dimethylarsinate, the enzyme also produces trimethylarsenite and dimethylarsine gases Tetrahymena pyriformis ?
-
?
S-adenosyl-L-methionine + arsenite
-
Tetrahymena pyriformis S-adenosyl-L-homocysteine + methylarsonate
-
?
S-adenosyl-L-methionine + methylarsonite
-
Tetrahymena pyriformis S-adenosyl-L-homocysteine + dimethylarsinate
-
?

Subunits

Subunits Comment Organism
? x * 30000, His-tagged enzyme, SDS-PAGE Tetrahymena pyriformis
? x * 35400, His-tagged enzyme, calculated from amino acid sequence Tetrahymena pyriformis

Synonyms

Synonyms Comment Organism
arsenite methyltransferase
-
Tetrahymena pyriformis
ArsM
-
Tetrahymena pyriformis
As(III) methyltransferase
-
Tetrahymena pyriformis

Temperature Range [°C]

Temperature Minimum [°C] Temperature Maximum [°C] Comment Organism
16 37 purified enzyme converts almost all arsenite to dimethylarsinate at temperatures of 16–37°C in pH 7.5 buffer, while at higher temperatures the rate of arsenite transformation is reduced Tetrahymena pyriformis

pH Optimum

pH Optimum Minimum pH Optimum Maximum Comment Organism
7.5
-
-
Tetrahymena pyriformis