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Literature summary for 2.1.1.165 extracted from

  • Ohsawa, N.; Tsujita, M.; Morikawa, S.; Itoh, N.
    Purification and characterization of a monohalomethane-producing enzyme S-adenosyl-L-methionine: halide ion methyltransferase from a marine microalga, Pavlova pinguis (2001), Biosci. Biotechnol. Biochem., 65, 2397-2404.
    View publication on PubMed

Inhibitors

Inhibitors Comment Organism Structure
2-mercaptoethanol 1 mM, 16% inhibition, production of methyl iodide Pavlova pinguis
CN- 100 mM, complete inhibition, production of methyl iodide Pavlova pinguis
CoCl2 1 mM, 18% inhibition, production of methyl iodide Pavlova pinguis
dithiothreitol 5 mM, 28% inhibition, production of methyl iodide Pavlova pinguis
EDTA 5 mM, 32% inhibition, production of methyl iodide Pavlova pinguis
HS- 10 mM, 84% inhibition, production of methyl iodide Pavlova pinguis
MgSO4 1 mM, 25% inhibition, production of methyl iodide Pavlova pinguis
monoiodoacetate 5 mM, 28% inhibition, production of methyl iodide Pavlova pinguis
additional information activity is not inhibited by high iodide concentrations Pavlova pinguis
NaN3 5 mM, 32% inhibition, production of methyl iodide Pavlova pinguis
NiCl2 1 mM, 38% inhibition, production of methyl iodide Pavlova pinguis
PCMB 0.5 mM, 30% inhibition, production of methyl iodide Pavlova pinguis
SCN- 10 mM, 60% inhibition, production of methyl iodide Pavlova pinguis
ZnCl2 1 mM, 14% inhibition, production of methyl iodide Pavlova pinguis

KM Value [mM]

KM Value [mM] KM Value Maximum [mM] Substrate Comment Organism Structure
0.012
-
S-adenosyl-L-methionine 30°C Pavlova pinguis
12
-
Iodide 30°C Pavlova pinguis

Metals/Ions

Metals/Ions Comment Organism Structure
additional information various metal ions have no significant effect on methyl iodide production, suggesting that the enzyme does not require metal ions Pavlova pinguis

Molecular Weight [Da]

Molecular Weight [Da] Molecular Weight Maximum [Da] Comment Organism
29000
-
gel filtration Pavlova pinguis

Organism

Organism UniProt Comment Textmining
Pavlova pinguis
-
-
-

Purification (Commentary)

Purification (Comment) Organism
-
Pavlova pinguis

Specific Activity [micromol/min/mg]

Specific Activity Minimum [µmol/min/mg] Specific Activity Maximum [µmol/min/mg] Comment Organism
0.0018
-
-
Pavlova pinguis

Substrates and Products (Substrate)

Substrates Comment Substrates Organism Products Comment (Products) Rev. Reac.
additional information the enzyme also catalyzes the methylation of HS- to methyl mercaptan (EC 2.1.1.9) Pavlova pinguis ?
-
?
S-adenosyl-L-methionine + bromide
-
Pavlova pinguis S-adenosyl-L-homocysteine + methyl bromide
-
?
S-adenosyl-L-methionine + chloride
-
Pavlova pinguis S-adenosyl-L-homocysteine + methyl chloride
-
?
S-adenosyl-L-methionine + iodide the enzyme is strictly dependent on S-adenosyl-L-methionine as a methyl donor Pavlova pinguis S-adenosyl-L-homocysteine + methyl iodide
-
?

Subunits

Subunits Comment Organism
monomer 1 * 29000, SDS-PAGE Pavlova pinguis

Synonyms

Synonyms Comment Organism
HMT
-
Pavlova pinguis
S-adenosyl-L-methionine: halide ion methyltransferase
-
Pavlova pinguis

pH Optimum

pH Optimum Minimum pH Optimum Maximum Comment Organism
8
-
-
Pavlova pinguis

pH Range

pH Minimum pH Maximum Comment Organism
5.4 10 pH 5.4: about 50% of maximal activity, pH 10.0: about 80% of maximal activity Pavlova pinguis

pI Value

Organism Comment pI Value Maximum pI Value
Pavlova pinguis
-
-
5.3