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Literature summary for 3.4.21.57 extracted from

  • Aducci, P.; Ascenzi, P.; Pierini, M.; Ballio, A.
    Purification and characterization of Leu-proteinase, the leucine specific serine proteinase from spinach (Spinacia oleracea L.) leaves (1986), Plant Physiol., 81, 812-816.
    View publication on PubMedView publication on EuropePMC

Inhibitors

Inhibitors Comment Organism Structure
diisopropyl fluorophosphate
-
Spinacia oleracea
Nalpha-tosyl-L-Leu chloromethyl ketone
-
Spinacia oleracea
phenylmethylsulfonyl fluoride
-
Spinacia oleracea

KM Value [mM]

KM Value [mM] KM Value Maximum [mM] Substrate Comment Organism Structure
0.05
-
Nalpha-benzoyl-Leu 4-nitroanilide
-
Spinacia oleracea
0.18
-
Nalpha-benzoyl-Val 4-nitroanilide
-
Spinacia oleracea
0.25
-
Nalpha-benzoyl-Ala 4-nitroanilide
-
Spinacia oleracea
0.45
-
Nalpha-benzoyl-Lys 4-nitroanilide
-
Spinacia oleracea
0.47
-
Nalpha-benzoyl-L-Arg-4-nitroanilide
-
Spinacia oleracea
0.63
-
azocasein
-
Spinacia oleracea
0.89
-
Nalpha-benzoyl-Gly 4-nitroanilide
-
Spinacia oleracea

Molecular Weight [Da]

Molecular Weight [Da] Molecular Weight Maximum [Da] Comment Organism
60000
-
Spinacia oleracea, gel filtration Spinacia oleracea

Organism

Organism UniProt Comment Textmining
Spinacia oleracea
-
-
-

Source Tissue

Source Tissue Comment Organism Textmining
leaf
-
Spinacia oleracea
-

Specific Activity [micromol/min/mg]

Specific Activity Minimum [µmol/min/mg] Specific Activity Maximum [µmol/min/mg] Comment Organism
4.5
-
-
Spinacia oleracea

Substrates and Products (Substrate)

Substrates Comment Substrates Organism Products Comment (Products) Rev. Reac.
azocasein + H2O
-
Spinacia oleracea ?
-
?
Azocoll + H2O
-
Spinacia oleracea ?
-
?
Nalpha-benzoyl-Gly 4-nitroanilide + H2O
-
Spinacia oleracea Nalpha-benzoyl-Gly + 4-nitroaniline
-
?
Nalpha-benzoyl-L-Ala 4-nitroanilide + H2O
-
Spinacia oleracea Nalpha-benzoyl-L-Ala + 4-nitroaniline
-
?
Nalpha-benzoyl-L-Arg 4-nitroanilide + H2O
-
Spinacia oleracea Nalpha-benzoyl-L-Arg + 4-nitroaniline
-
?
Nalpha-benzoyl-L-Arg-4-nitroanilide + H2O
-
Spinacia oleracea Nalpha-benzoyl-L-Arg + 4-nitroaniline
-
?
Nalpha-benzoyl-L-Leu 4-nitroanilide + H2O
-
Spinacia oleracea Nalpha-benzoyl-L-Leu + 4-nitroaniline
-
?
Nalpha-benzoyl-L-Lys 4-nitroanilide + H2O
-
Spinacia oleracea Nalpha-benzoyl-L-Lys + 4-nitroaniline
-
?
Nalpha-benzoyl-Val 4-nitroanilide + H2O
-
Spinacia oleracea Nalpha-benzoyl-Val + 4-nitroaniline
-
?

Turnover Number [1/s]

Turnover Number Minimum [1/s] Turnover Number Maximum [1/s] Substrate Comment Organism Structure
1.2
-
Nalpha-benzoyl-Gly 4-nitroanilide
-
Spinacia oleracea
1.8
-
Nalpha-benzoyl-L-Lys 4-nitroanilide
-
Spinacia oleracea
2.1
-
Nalpha-benzoyl-L-Arg-4-nitroanilide
-
Spinacia oleracea
4.9
-
Nalpha-benzoyl-L-Ala 4-nitroanilide
-
Spinacia oleracea
6.1
-
Nalpha-benzoyl-Val 4-nitroanilide
-
Spinacia oleracea
21.3
-
Nalpha-benzoyl-Leu 4-nitroanilide
-
Spinacia oleracea

pH Optimum

pH Optimum Minimum pH Optimum Maximum Comment Organism
additional information
-
pI: 4.8 Spinacia oleracea