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Literature summary for 3.5.4.5 extracted from

  • Wentworth, D.F.; Wolfenden, R.
    On the interaction of 3,4,5,6-tetrahydrouridine with human liver cytidine deaminase (1975), Biochemistry, 14, 5099-5105.
    View publication on PubMed

Application

Application Comment Organism
medicine enzyme limits the effectiveness of the antineoplastic agent cytosine arabinoside or aracytidine in the treatment of acute myeloblastic leukemias, chemotherapeutic use of the inhibitor THU to protect antileukemic agents from deaminase attack, inhibitors of cytidine deaminase prolongs the plasma halflife of antitumor or antiviral drugs Homo sapiens

Inhibitors

Inhibitors Comment Organism Structure
uridine product inhibition Escherichia coli
uridine inhibition relatively slow Homo sapiens

KM Value [mM]

KM Value [mM] KM Value Maximum [mM] Substrate Comment Organism Structure
0.0092
-
cytidine
-
Homo sapiens
0.058
-
5-azacytidine
-
Homo sapiens
4.2
-
6-azacytidine
-
Homo sapiens

Natural Substrates/ Products (Substrates)

Natural Substrates Organism Comment (Nat. Sub.) Natural Products Comment (Nat. Pro.) Rev. Reac.
cytidine + H2O Escherichia coli
-
uridine + NH3
-
?
cytidine + H2O Homo sapiens
-
uridine + NH3
-
?

Organism

Organism UniProt Comment Textmining
Escherichia coli
-
-
-
Homo sapiens
-
human
-
Homo sapiens
-
HeLa cells
-

Source Tissue

Source Tissue Comment Organism Textmining
granulocyte
-
Homo sapiens
-
liver
-
Homo sapiens
-

Substrates and Products (Substrate)

Substrates Comment Substrates Organism Products Comment (Products) Rev. Reac.
5,6-dihydrocytidine + H2O
-
Escherichia coli 5,6-dihydrouridine + NH3
-
?
5-azacytidine + H2O
-
Escherichia coli 5-azauridine + NH3
-
?
5-azacytidine + H2O
-
Homo sapiens 5-azauridine + NH3
-
?
6-azacytidine + H2O
-
Homo sapiens 6-azauridine + NH3
-
?
cytidine + H2O
-
Escherichia coli uridine + NH3
-
?
cytidine + H2O
-
Homo sapiens uridine + NH3
-
?
cytosine arabinoside + H2O
-
Escherichia coli uridine arabinoside + NH3
-
?
cytosine arabinoside + H2O
-
Homo sapiens uridine arabinoside + NH3
-
?

pH Optimum

pH Optimum Minimum pH Optimum Maximum Comment Organism
5
-
-
Homo sapiens
8
-
-
Homo sapiens
10
-
-
Homo sapiens