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Literature summary for 2.3.1.30 extracted from

  • Saito, K.; Yokoyama, H.; Noji, M.; Murakoshi, I.
    Molecular cloning and characterization of a plant serine acetyltransferase playing a regulatory role in cysteine biosynthesis from watermelon (1995), J. Biol. Chem., 270, 16321-16326.
    View publication on PubMed

Cloned(Commentary)

Cloned (Comment) Organism
isolation of cDNA clone from Citrullus vulgaris genetic library by complementation of a Cys- Escherichia coli strain JM 39/5, single copy gene, DNA and amino acid sequence determination Citrullus lanatus subsp. vulgaris

Inhibitors

Inhibitors Comment Organism Structure
CoA
-
Citrullus lanatus subsp. vulgaris
L-cysteine allosteric inhibition Citrullus lanatus subsp. vulgaris
additional information beta-(pyrazol-1-yl)-L-alanine has no inhibitory effect Citrullus lanatus subsp. vulgaris

KM Value [mM]

KM Value [mM] KM Value Maximum [mM] Substrate Comment Organism Structure
0.13
-
acetyl-CoA
-
Citrullus lanatus subsp. vulgaris
0.59
-
L-serine
-
Citrullus lanatus subsp. vulgaris

Molecular Weight [Da]

Molecular Weight [Da] Molecular Weight Maximum [Da] Comment Organism
additional information
-
multi-enzyme complex is formed between serine acetyltransferase and cysteine synthase possibly leading to metabolic channeling Citrullus lanatus subsp. vulgaris
450000 500000 multienzyme complex of L-serine acetyltransferase and L-cysteine synthase, gel filtration Citrullus lanatus subsp. vulgaris

Natural Substrates/ Products (Substrates)

Natural Substrates Organism Comment (Nat. Sub.) Natural Products Comment (Nat. Pro.) Rev. Reac.
acetyl-CoA + L-serine Citrullus lanatus subsp. vulgaris regulatory role in cysteine biosynthesis CoA + O-acetyl-L-serine
-
ir
additional information Citrullus lanatus subsp. vulgaris multienzyme complex is formed between serine acetyltransferase and cysteine synthase possibly leading to metabolic channeling ?
-
?

Organism

Organism UniProt Comment Textmining
Citrullus lanatus subsp. vulgaris
-
watermelon
-

Source Tissue

Source Tissue Comment Organism Textmining
hypocotyl
-
Citrullus lanatus subsp. vulgaris
-
additional information accumulation in etiolated plants Citrullus lanatus subsp. vulgaris
-
seedling hypocotyl of etiolated seedlings Citrullus lanatus subsp. vulgaris
-

Specific Activity [micromol/min/mg]

Specific Activity Minimum [µmol/min/mg] Specific Activity Maximum [µmol/min/mg] Comment Organism
14.7
-
recombinant protein Citrullus lanatus subsp. vulgaris

Substrates and Products (Substrate)

Substrates Comment Substrates Organism Products Comment (Products) Rev. Reac.
acetyl-CoA + L-serine
-
Citrullus lanatus subsp. vulgaris CoA + O-acetyl-L-serine
-
?
acetyl-CoA + L-serine regulatory role in cysteine biosynthesis Citrullus lanatus subsp. vulgaris CoA + O-acetyl-L-serine
-
ir
additional information multienzyme complex is formed between serine acetyltransferase and cysteine synthase possibly leading to metabolic channeling Citrullus lanatus subsp. vulgaris ?
-
?

pH Optimum

pH Optimum Minimum pH Optimum Maximum Comment Organism
7.6 8 Tris-buffer Citrullus lanatus subsp. vulgaris

Ki Value [mM]

Ki Value [mM] Ki Value maximum [mM] Inhibitor Comment Organism Structure
0.0037
-
L-cysteine versus L-serine Citrullus lanatus subsp. vulgaris
0.0056
-
L-cysteine versus acetyl-CoA Citrullus lanatus subsp. vulgaris
0.064
-
CoA versus acetyl-CoA Citrullus lanatus subsp. vulgaris