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Literature summary for 2.1.2.7 extracted from

  • Wilson, E.M.; Snell, E.E.
    Metabolism of alpha-methylserine. I. Alpha-methylserine hydroxymethyltransferase (1962), J. Biol. Chem., 237, 3171-3179.
    View publication on PubMed
Search for more literature for 2.1.2.7

Crystallization (Commentary)

Crystallization (Comment) Organism
-
 Pseudomonas sp.

General Stability

General Stability Organism
tetrahydrofolate plus pyridoxal 5-phosphate plus hydroxymethylserine increase temperature-stability Pseudomonas sp.

Inhibitors

Inhibitors Comment Organism Structure
Cu2+ at higher concentrations Pseudomonas sp.
DL-cycloserine strong, competitive Pseudomonas sp.
Fe2+ at higher concentrations Pseudomonas sp.
Fe3+ at higher concentrations Pseudomonas sp.
L-Cycloserine
-
 Pseudomonas sp.
L-serine weak, competitive Pseudomonas sp.
additional information iodoacetate, GSH; no inhibition by Mg2+, Mn2+, Al3+, 2-mercaptoethanol Pseudomonas sp.
p-chloromercuribenzoate
-
 Pseudomonas sp.
Zn2+ at higher concentrations Pseudomonas sp.

KM Value [mM]

KM Value [mM] KM Value Maximum [mM] Substrate Comment Organism Structure
0.25
-
 L-tetrahydrofolate pH 7.5, calculated on the basis of one isomer Pseudomonas sp.
0.8
-
 hydroxymethylserine pH 7.5 Pseudomonas sp.
1.5
-
 2-methyl-DL-serine pH 7.5 Pseudomonas sp.
6.2
-
 2-ethyl-DL-serine pH 7.5 Pseudomonas sp.

Localization

Localization Comment Organism GeneOntology No. Textmining
cytoplasm
-
 Pseudomonas sp. 5737
-

Organism

Organism UniProt Comment Textmining
Pseudomonas sp.
-
 inducible enzyme
-
Pseudomonas sp. MS
-
 inducible enzyme
-

Purification (Commentary)

Purification (Comment) Organism
partial Pseudomonas sp.

Specific Activity [micromol/min/mg]

Specific Activity Minimum [µmol/min/mg] Specific Activity Maximum [µmol/min/mg] Comment Organism
17.4
-
-
 Pseudomonas sp.

Substrates and Products (Substrate)

Substrates Comment Substrates Organism Products Comment (Products) Rev. Reac.
tetrahydrofolate + (+)-2-methylserine stereospecific, dimedon cannot replace tetrahydrofolate Pseudomonas sp. 5,10-methylenetetrahydrofolate + D-alanine + H2O 5,10-methylenetetrahydrofolate is non-enzymatically cleaved to tetrahydrofolate and formaldehyde r
tetrahydrofolate + (+)-2-methylserine stereospecific, dimedon cannot replace tetrahydrofolate Pseudomonas sp. MS 5,10-methylenetetrahydrofolate + D-alanine + H2O 5,10-methylenetetrahydrofolate is non-enzymatically cleaved to tetrahydrofolate and formaldehyde r
tetrahydrofolate + (-)-ethylserine
-
 Pseudomonas sp. 5,10-methylenetetrahydrofolate + D-2-aminobutyrate + H2O
-
 r
tetrahydrofolate + (-)-ethylserine
-
 Pseudomonas sp. MS 5,10-methylenetetrahydrofolate + D-2-aminobutyrate + H2O
-
 r
tetrahydrofolate + 2-ethyl-DL-serine
-
 Pseudomonas sp. 5,10-methylenetetrahydrofolate + D-2-aminobutyrate + H2O
-
 r
tetrahydrofolate + 2-ethyl-DL-serine
-
 Pseudomonas sp. MS 5,10-methylenetetrahydrofolate + D-2-aminobutyrate + H2O
-
 r
tetrahydrofolate + 2-hydroxymethylserine
-
 Pseudomonas sp. 5,10-methylenetetrahydrofolate + D-serine + H2O
-
 ?
tetrahydrofolate + 2-hydroxymethylserine
-
 Pseudomonas sp. MS 5,10-methylenetetrahydrofolate + D-serine + H2O
-
 ?
tetrahydrofolate + 2-methyl-DL-serine
-
 Pseudomonas sp. 5,10-methylenetetrahydrofolate + D-alanine + H2O
-
 r
tetrahydrofolate + 2-methyl-DL-serine
-
 Pseudomonas sp. MS 5,10-methylenetetrahydrofolate + D-alanine + H2O
-
 r

Temperature Optimum [°C]

Temperature Optimum [°C] Temperature Optimum Maximum [°C] Comment Organism
45
-
-
 Pseudomonas sp.

Temperature Range [°C]

Temperature Minimum [°C] Temperature Maximum [°C] Comment Organism
33 48 about half-maximal activity at 33°C and 90% activity at 48°C Pseudomonas sp.

Temperature Stability [°C]

Temperature Stability Minimum [°C] Temperature Stability Maximum [°C] Comment Organism
45
-
 96% loss of activity after 10 min, hydroxymethylserine plus tetrahydrofolate and pyridoxal 5'-phosphate prevent Pseudomonas sp.
50
-
 complete inactivation after 10 min, 55% loss of activity in the presence of tetrahydrofolate, pyridoxal 5'-phosphate plus hydroxymethylserine or D-serine Pseudomonas sp.

pH Optimum

pH Optimum Minimum pH Optimum Maximum Comment Organism
9
-
-
 Pseudomonas sp.

pH Range

pH Minimum pH Maximum Comment Organism
6 10.5 about half-maximal activity at pH 6.0 and 10.5 Pseudomonas sp.

Cofactor

Cofactor Comment Organism Structure
pyridoxal 5'-phosphate requirement Pseudomonas sp.
pyridoxal 5'-phosphate Km: 0.01 mM at pH 7.5 Pseudomonas sp.

Ki Value [mM]

Ki Value [mM] Ki Value maximum [mM] Inhibitor Comment Organism Structure
0.0022
-
 D-cycloserine
-
 Pseudomonas sp.
0.005
-
 L-Cycloserine
-
 Pseudomonas sp.
5.6
-
 L-serine
-
 Pseudomonas sp.