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Literature summary for 3.5.4.16 extracted from

  • Kohashi, M.; Itadani, T.; Iwai, K.
    Purification and characterization of guanosine triphosphate cyclohydrolase from Serratia indica (1980), Agric. Biol. Chem., 44, 271-278.
No PubMed abstract available

Inhibitors

Inhibitors Comment Organism Structure
Cd2+
-
Serratia indica
Cu2+
-
Serratia indica
Hg2+
-
Serratia indica

KM Value [mM]

KM Value [mM] KM Value Maximum [mM] Substrate Comment Organism Structure
additional information
-
additional information
-
Serratia indica

Metals/Ions

Metals/Ions Comment Organism Structure
K+ activates Serratia indica
Li+ activates Serratia indica
Na+ activates Serratia indica

Molecular Weight [Da]

Molecular Weight [Da] Molecular Weight Maximum [Da] Comment Organism
25000
-
8 * 25000, SDS-PAGE Serratia indica
200000
-
gel filtration, D-I, D-II Serratia indica

Natural Substrates/ Products (Substrates)

Natural Substrates Organism Comment (Nat. Sub.) Natural Products Comment (Nat. Pro.) Rev. Reac.
GTP + H2O Serratia indica first step in pathway of pterins formate + 2-amino-4-hydroxy-6-(erythro-1,2,3-trihydroxypropyl)dihydropteridine triphosphate
-
?

Organism

Organism UniProt Comment Textmining
Serratia indica
-
multiple forms, D-I, D-II
-

Purification (Commentary)

Purification (Comment) Organism
-
Serratia indica

Specific Activity [micromol/min/mg]

Specific Activity Minimum [µmol/min/mg] Specific Activity Maximum [µmol/min/mg] Comment Organism
67
-
-
Serratia indica

Substrates and Products (Substrate)

Substrates Comment Substrates Organism Products Comment (Products) Rev. Reac.
GTP + H2O
-
Serratia indica formate + 2-amino-4-hydroxy-6-(erythro-1,2,3-trihydroxypropyl)-dihydropteridine triphosphate
-
?
GTP + H2O first step in pathway of pterins Serratia indica formate + 2-amino-4-hydroxy-6-(erythro-1,2,3-trihydroxypropyl)dihydropteridine triphosphate
-
?

Subunits

Subunits Comment Organism
octamer 8 * 25000, SDS-PAGE Serratia indica