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Literature summary for 3.4.21.57 extracted from

  • Aducci, P.; Ascenzi, P.; Ballio, A.
    Esterolytic properties of leucine-proteinase, the leucine-specific serine proteinase from spinach (Spinacia oleracea L.) leaves. A steady-state and pre-steady-state study (1986), Plant Physiol., 82, 591-593.
    View publication on PubMedView publication on EuropePMC

KM Value [mM]

KM Value [mM] KM Value Maximum [mM] Substrate Comment Organism Structure
additional information
-
additional information Km values are pH-independent Spinacia oleracea
0.018
-
Nalpha-carbobenzoxy-Leu 4-nitrophenyl ester
-
Spinacia oleracea
0.065
-
Nalpha-carbobenzoxy-Ile 4-nitrophenyl ester
-
Spinacia oleracea
0.066
-
Nalpha-carbobenzoxy-Val 4-nitrophenyl ester
-
Spinacia oleracea
0.12
-
Nalpha-carbobenzoxy-Ala 4-nitrophenyl ester
-
Spinacia oleracea
0.26
-
Nalpha-carbobenzoxy-Lys 4-nitrophenyl ester
-
Spinacia oleracea
0.28
-
Nalpha-carbobenzoxy-Arg 4-nitrophenyl ester
-
Spinacia oleracea
0.52
-
Nalpha-carbobenzoxy-Gly 4-nitrophenyl ester
-
Spinacia oleracea

Organism

Organism UniProt Comment Textmining
Spinacia oleracea
-
-
-

Source Tissue

Source Tissue Comment Organism Textmining
leaf
-
Spinacia oleracea
-

Substrates and Products (Substrate)

Substrates Comment Substrates Organism Products Comment (Products) Rev. Reac.
Nalpha-carbobenzoxy-Ala 4-nitrophenyl ester + H2O
-
Spinacia oleracea Nalpha-carbobenzoxy-Ala + 4-nitrophenol
-
?
Nalpha-carbobenzoxy-Arg 4-nitrophenyl ester + H2O
-
Spinacia oleracea Nalpha-carbobenzoxy-Arg + 4-nitrophenol
-
?
Nalpha-carbobenzoxy-Gly 4-nitrophenyl ester + H2O
-
Spinacia oleracea Nalpha-carbobenzoxy-Gly + 4-nitrophenol
-
?
Nalpha-carbobenzoxy-Ile 4-nitrophenyl ester + H2O
-
Spinacia oleracea Nalpha-carbobenzoxy-Ile + 4-nitrophenol
-
?
Nalpha-carbobenzoxy-Leu 4-nitrophenyl ester + H2O
-
Spinacia oleracea Nalpha-carbobenzoxy-Leu + 4-nitrophenol
-
?
Nalpha-carbobenzoxy-Lys 4-nitrophenyl ester + H2O
-
Spinacia oleracea Nalpha-carbobenzoxy-Lys + 4-nitrophenol
-
?
Nalpha-carbobenzoxy-Val 4-nitrophenyl ester + H2O
-
Spinacia oleracea Nalpha-carbobenzoxy-Val + 4-nitrophenol
-
?

Turnover Number [1/s]

Turnover Number Minimum [1/s] Turnover Number Maximum [1/s] Substrate Comment Organism Structure
additional information
-
additional information the acylation step is the rate-limiting in catalysis Spinacia oleracea
21
-
Nalpha-carbobenzoxy-Gly 4-nitrophenyl ester
-
Spinacia oleracea
43
-
Nalpha-carbobenzoxy-Arg 4-nitrophenyl ester
-
Spinacia oleracea
45
-
Nalpha-carbobenzoxy-Lys 4-nitrophenyl ester
-
Spinacia oleracea
94
-
Nalpha-carbobenzoxy-Ala 4-nitrophenyl ester
-
Spinacia oleracea
140
-
Nalpha-carbobenzoxy-Ile 4-nitrophenyl ester
-
Spinacia oleracea
140
-
Nalpha-carbobenzoxy-Val 4-nitrophenyl ester
-
Spinacia oleracea
430
-
Nalpha-carbobenzoxy-Leu 4-nitrophenyl ester
-
Spinacia oleracea

pH Optimum

pH Optimum Minimum pH Optimum Maximum Comment Organism
7.5
-
approximately Spinacia oleracea