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3.4.23.1: pepsin A

This is an abbreviated version!
For detailed information about pepsin A, go to the full flat file.

Word Map on EC 3.4.23.1

Reaction

Preferential cleavage: hydrophobic, preferably aromatic, residues in P1 and P1' positions. Cleaves Phe1-/-Val, Gln4-/-His, Glu13-/-Ala, Ala14-/-Leu, Leu15-/-Tyr, Tyr16-/-Leu, Gly23-/-Phe, Phe24-/-Phe and Phe25-/-Tyr bonds in the B chain of insulin =

Synonyms

Aspartic proteinase, EC 3.4.4.1, elixir lactate of pepsin, fundus-pepsin, lactated pepsin, lactated pepsin elixir, P I, P-Ia, P-Ib, P-II, P-III, pep/PAG-L, pepsin, pepsin 1, pepsin A, pepsin A1, pepsin A2, pepsin D, pepsin fortior, Pepsin I/II, pepsin R, pepsinogen A, pepsinogen/PAG-Like, pepsins A1, pepsins A2, PG1, PG1-1, PG2, PG2-2, shewasin A, shewasin D

ECTree

     3 Hydrolases
         3.4 Acting on peptide bonds (peptidases)
             3.4.23 Aspartic endopeptidases
                3.4.23.1 pepsin A

Turnover Number

Turnover Number on EC 3.4.23.1 - pepsin A

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TURNOVER NUMBER [1/s]
SUBSTRATE
ORGANISM
UNIPROT
COMMENTARY hide
LITERATURE
IMAGE
3.51
((7-methoxycoumarin-4-yl)acetyl)-Lys-Lys-Pro-Ala-Glu-Phe-Phe-Ala-Leu-Lys-(2,4-dinitrophenyl)
at pH 4.0 and 37°C
5.43 - 19.1
Acid-denatured hemoglobin
-
8.9 - 45
AFPLEFEREL
85 - 472
AFPLEFFREL
56 - 203
AFPLEFIREL
56.5 - 71.8
benzyloxycarbonyl-Gly-Gly-Phe-Phe 3-(4-pyridyl)propyl ester
2.2 - 3.1
benzyloxycarbonyl-Gly-Phe-Phe 3-(4-pyridyl)propyl ester
0.21
benzyloxycarbonyl-His-Phe-Phe-NH2
-
-
0.31
benzyloxycarbonyl-His-Phe-Phe-O-ethyl ester
-
-
0.15
benzyloxycarbonyl-His-Phe-Phe-O-methyl ester
-
-
0.013
benzyloxycarbonyl-His-Trp-Phe-O-methyl ester
-
-
0.013
benzyloxycarbonyl-His-Tyr-Phe-O-methyl ester
-
-
0.49 - 0.74
benzyloxycarbonyl-Phe-Phe 3-(4-pyridyl)propyl ester
0.08 - 0.13
benzyloxycarbonyl-Phe-Phe-OEt
4.44
bovine serum albumin
-
at 43 mM ionic strength, at pH 2.0 and 37°C
-
7.34 - 62.9
hemoglobin
-
5 - 96
KPAEFF(NO2)AL
4.69 - 215.5
KPAEFFRL
0.24 - 97.8
KPIEF(NO2)RL
0.63 - 55.5
KPIKF(NO2)RL
0.8 - 60.4
KPILF(NO2)RL
0.1 - 97.7
KPIQF(NO2)RL
0.21 - 79.8
KPPEF(NO2)RL
16 - 162
L-Lys-L-Pro-L-Ala-L-Glu-L-Phe-L-Phe(NO2)-L-Ala-L-Leu
1.2 - 88.7
Leu-Ser-Phe(p-NO2)-Nle-Ala-Leu
56
Lys-Pro-Ala-Glu-Phe-Phe(NO2)-Ala-Leu
-
pH 5.3, 25°C
2.5 - 181
Lys-Pro-Ala-Glu-Phe-Phe(p-NO2)-Ala-Leu
0.03
Mca-KKPAEFFALK-Dnp
at pH 4.0 and 37°C
7
N,N-dimethylcasein
-
-
-
18.3
N,N-dimethylhemoglobin
-
-
-
2.7 - 3.7
POMC (165-174)
0.54 - 3.32
Pro-Thr-Glu-Phe-(p-nitro-Phe)-Arg-Leu-OH
38.8 - 61
Substance P
additional information
additional information
-