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Literature summary for 3.4.22.2 extracted from

  • Glazer, A.N.; Smith, E.L.
    Papain and other plant sulfhydryl proteolytic enzymes (1971), The Enzymes, 3rd Ed. (Boyer, P. D. , ed. ), 3, 501-546.
No PubMed abstract available

Activating Compound

Activating Compound Comment Organism Structure
Cys activates Carica papaya
EDTA required for maximal activity Carica papaya
Reducing agents e.g. 2,3-dimercaptopropanol, activates Carica papaya
Sodium borohydride activates Carica papaya
thiol compounds activate Carica papaya

General Stability

General Stability Organism
remains fully active after prolonged exposure to 9 M urea Carica papaya

Inhibitors

Inhibitors Comment Organism Structure
1,3-Dibromoacetone
-
Carica papaya
Bromoacetic acid
-
Carica papaya
DFP
-
Carica papaya
iodoacetamide
-
Carica papaya
iodoacetic acid
-
Carica papaya
p-CH3-C6H4(SO2)-NH-CH2-CO-CH2Cl
-
Carica papaya

KM Value [mM]

KM Value [mM] KM Value Maximum [mM] Substrate Comment Organism Structure
0.008
-
N-benzyloxycarbonyl-Gly p-nitrophenyl ester
-
Carica papaya
10
-
Nalpha-benzoyl-L-citrulline methyl ester
-
Carica papaya
18
-
Nalpha-benzoyl-L-Arg ethyl ester at 37°C Carica papaya
20
-
Nalpha-benzyloxycarbonyl-L-histidinamide
-
Carica papaya
21
-
N-benzoylglycinamide 38°C Carica papaya
23
-
Nalpha-benzoyl-L-Arg ethyl ester at 25°C Carica papaya
32
-
Nalpha-benzoyl-L-argininamide 25°C Carica papaya
40
-
Nalpha-benzoyl-L-argininamide 38°C Carica papaya
320
-
N-benzyloxycarbonyl-Gly-Gly
-
Carica papaya

Molecular Weight [Da]

Molecular Weight [Da] Molecular Weight Maximum [Da] Comment Organism
23406
-
x * 23406, calculation from amino acid sequence Carica papaya
23700
-
equilibrium sedimentation Carica papaya

Organism

Organism UniProt Comment Textmining
Carica papaya
-
-
-

Source Tissue

Source Tissue Comment Organism Textmining
juice maximal concentration is reached early in the development of the fruit Carica papaya
-

Substrates and Products (Substrate)

Substrates Comment Substrates Organism Products Comment (Products) Rev. Reac.
N-acetyl-L-tyrosinamide + H2O
-
Carica papaya N-acetyl-L-Tyr + NH3
-
?
N-benzoylglycinamide + H2O
-
Carica papaya Nalpha-benzoyl-Gly + NH3
-
?
N-benzyloxycarbonyl-Gly 2-nitrophenyl ester + H2O
-
Carica papaya N-benzyloxycarbonyl-Gly + 2-nitrophenol
-
?
N-benzyloxycarbonyl-Gly 3-nitrophenyl ester + H2O
-
Carica papaya N-benzyloxycarbonyl-Gly + 3-nitrophenol
-
?
N-Benzyloxycarbonyl-Gly 4-nitrophenyl ester + H2O
-
Carica papaya N-Benzyloxycarbonyl-Gly + 4-nitrophenol
-
?
N-benzyloxycarbonyl-Gly ethyl ester + H2O
-
Carica papaya ?
-
?
N-benzyloxycarbonyl-Gly phenyl ester + H2O
-
Carica papaya ?
-
?
N-benzyloxycarbonyl-Gly-Gly + H2O
-
Carica papaya ?
-
?
N-benzyloxycarbonyl-L-Glu diamide + H2O
-
Carica papaya ?
-
?
N-benzyloxycarbonyl-L-histidinamide + H2O
-
Carica papaya Nalpha-benzoyl-L-His + NH3
-
?
N-benzyloxycarbonyl-L-leucinamide + H2O
-
Carica papaya Nalpha-benzoyl-L-Leu + NH3
-
?
Nalpha-Benzoyl-L-Arg ethyl ester + H2O
-
Carica papaya ?
-
?
Nalpha-benzoyl-L-argininamide + H2O
-
Carica papaya Nalpha-benzoyl-L-Arg + NH3
-
?
Nalpha-benzoyl-L-citrulline methyl ester + H2O
-
Carica papaya ?
-
?
Nalpha-benzoyl-L-lysinamide + H2O
-
Carica papaya Nalpha-benzoyl-L-Lys + NH3
-
?
Nalpha-benzyloxycarbonyl-L-histidinamide + H2O
-
Carica papaya ?
-
?

Subunits

Subunits Comment Organism
? x * 23406, calculation from amino acid sequence Carica papaya

Turnover Number [1/s]

Turnover Number Minimum [1/s] Turnover Number Maximum [1/s] Substrate Comment Organism Structure
additional information
-
additional information
-
Carica papaya

pH Stability

pH Stability pH Stability Maximum Comment Organism
4
-
rapid and irreversible inactivation, at elevated temperatures Carica papaya