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Literature summary extracted from

  • Maruyama, A.; Saito, K.; Ishizawa, K.
    beta-Cyanoalanine synthase and cysteine synthase from potato: molecular cloning, biochemical characterization, and spatial and hormonal regulation (2001), Plant Mol. Biol., 46, 749-760.
    View publication on PubMed

Cloned(Commentary)

EC Number Cloned (Comment) Organism
2.5.1.47
-
Solanum tuberosum
4.4.1.9 expression of PCAS-1 in Escherichia coli Solanum tuberosum
4.4.1.9 expression of PCAS-2 in Escherichia coli Solanum tuberosum

KM Value [mM]

EC Number KM Value [mM] KM Value Maximum [mM] Substrate Comment Organism Structure
2.5.1.47 0.0384
-
cysteine pH 8.5, enzyme form PCS-2 Solanum tuberosum
2.5.1.47 0.0512
-
cysteine pH 8.5, enzyme form PCS-1 Solanum tuberosum
2.5.1.47 0.998
-
H2S pH 7.5, enzyme form PCS-2 Solanum tuberosum
2.5.1.47 1.57
-
H2S pH 7.5, enzyme form PCS-1 Solanum tuberosum
2.5.1.47 1.83
-
O-acetyl-L-serine pH 7.5, enzyme form PCS-2 Solanum tuberosum
2.5.1.47 2.99
-
O-acetyl-L-serine pH 7.5, enzyme form PCS-1 Solanum tuberosum
2.5.1.47 14.2
-
CN- pH 8.5, enzyme form PCS-1 Solanum tuberosum
2.5.1.47 15.1
-
CN- pH 8.5, enzyme form PCS-2 Solanum tuberosum
4.4.1.9 0.13
-
CN- pH 8.5 Solanum tuberosum
4.4.1.9 0.134
-
O-acetyl-L-serine pH 7.5 Solanum tuberosum
4.4.1.9 0.75
-
Na2S pH 7.5 Solanum tuberosum
4.4.1.9 1.5 2 Na2S pH 7.5 Solanum tuberosum
4.4.1.9 2.14
-
O-acetyl-L-serine pH 7.5 Solanum tuberosum
4.4.1.9 2.76
-
L-cysteine pH 8.5 Solanum tuberosum

Localization

EC Number Localization Comment Organism GeneOntology No. Textmining
2.5.1.47 cytosol enzyme form PCS-1 Solanum tuberosum 5829
-
2.5.1.47 plastid enzyme form PCS-2 Solanum tuberosum 9536
-

Molecular Weight [Da]

EC Number Molecular Weight [Da] Molecular Weight Maximum [Da] Comment Organism
4.4.1.9 37600
-
x * 37600, immunoblot Solanum tuberosum
4.4.1.9 38200
-
x * 38200, immunoblot Solanum tuberosum

Natural Substrates/ Products (Substrates)

EC Number Natural Substrates Organism Comment (Nat. Sub.) Natural Products Comment (Nat. Pro.) Rev. Reac.
4.4.1.9 L-cysteine + HCN Solanum tuberosum
-
sulfide + L-3-cyanoalanine
-
?
4.4.1.9 O-acetyl-L-serine + sulfide Solanum tuberosum
-
L-cysteine + acetate
-
?

Organism

EC Number Organism UniProt Comment Textmining
2.5.1.47 Solanum tuberosum
-
cv. Danshaku
-
4.4.1.9 Solanum tuberosum Q76MX2 cv. Danshaku
-
4.4.1.9 Solanum tuberosum Q9FS29 cv. Danshaku
-

Purification (Commentary)

EC Number Purification (Comment) Organism
4.4.1.9 recombinant PCAS-1 Solanum tuberosum
4.4.1.9 recombinant PCAS-2 Solanum tuberosum

Source Tissue

EC Number Source Tissue Comment Organism Textmining
2.5.1.47 tuber
-
Solanum tuberosum
-
4.4.1.9 bud 6.2 times and 2.5 times higher levels than in tubers and leaves, respectively Solanum tuberosum
-
4.4.1.9 leaf
-
Solanum tuberosum
-
4.4.1.9 tuber
-
Solanum tuberosum
-

Specific Activity [micromol/min/mg]

EC Number Specific Activity Minimum [µmol/min/mg] Specific Activity Maximum [µmol/min/mg] Comment Organism
4.4.1.9 0.25
-
substrate L-cysteine Solanum tuberosum
4.4.1.9 0.43
-
substrate O-acetyl-L-serine Solanum tuberosum
4.4.1.9 49.5
-
substrate O-acetyl-L-serine Solanum tuberosum
4.4.1.9 66.2
-
substrate L-cysteine Solanum tuberosum

Substrates and Products (Substrate)

EC Number Substrates Comment Substrates Organism Products Comment (Products) Rev. Reac.
2.5.1.47 cyanide + cysteine
-
Solanum tuberosum beta-cyanoalanine + sulfide
-
?
2.5.1.47 O-acetyl-L-Ser + H2S
-
Solanum tuberosum L-Cys + acetate
-
?
2.5.1.47 O-acetyl-L-serine
-
Solanum tuberosum L-cysteine + acetate
-
?
4.4.1.9 L-cysteine + HCN
-
Solanum tuberosum sulfide + L-3-cyanoalanine
-
?
4.4.1.9 L-cysteine + NaCN
-
Solanum tuberosum L-3-cyanoalanin + Na2S
-
?
4.4.1.9 O-acetyl-L-serine + sulfide
-
Solanum tuberosum L-cysteine + acetate
-
?

Subunits

EC Number Subunits Comment Organism
4.4.1.9 ? x * 37600, immunoblot Solanum tuberosum
4.4.1.9 ? x * 38200, immunoblot Solanum tuberosum

Synonyms

EC Number Synonyms Comment Organism
4.4.1.9 PCAS-1
-
Solanum tuberosum
4.4.1.9 PCAS-2
-
Solanum tuberosum