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Literature summary for 3.4.23.1 extracted from

  • Klomklao, S.; Kishimura, H.; Yabe, M.; Benjakul, S.
    Purification and characterization of two pepsins from the stomach of pectoral rattail (Coryphaenoides pectoralis) (2007), Comp. Biochem. Physiol. B, 147B, 682-689.
    View publication on PubMed

Inhibitors

Inhibitors Comment Organism Structure
EDTA 2 mM, 11.64% inhibition Albatrossia pectoralis
NaCl 30%, activity of pepsin A decreases by 60-65% Albatrossia pectoralis
pepstatin A 0.01 mM, 98.2% inhibition Albatrossia pectoralis

KM Value [mM]

KM Value [mM] KM Value Maximum [mM] Substrate Comment Organism Structure
0.098
-
hemoglobin pH 3.0, 37°C Albatrossia pectoralis

Metals/Ions

Metals/Ions Comment Organism Structure
CaCl2 5 mM, 1.39fold activation Albatrossia pectoralis
CoCl2 5 mM, 1.34fold activation Albatrossia pectoralis
MgCl2 10 mM, 1.24fold activation Albatrossia pectoralis

Molecular Weight [Da]

Molecular Weight [Da] Molecular Weight Maximum [Da] Comment Organism
35000
-
1 * 35000, SDS-PAGE Albatrossia pectoralis

Organism

Organism UniProt Comment Textmining
Albatrossia pectoralis
-
-
-

Purification (Commentary)

Purification (Comment) Organism
-
Albatrossia pectoralis

Source Tissue

Source Tissue Comment Organism Textmining
stomach
-
Albatrossia pectoralis
-

Specific Activity [micromol/min/mg]

Specific Activity Minimum [µmol/min/mg] Specific Activity Maximum [µmol/min/mg] Comment Organism
additional information
-
30.71 U/mg protein. One unit is defined as the amount causing an increase of 1.0 in absorbance at 280 nm per min Albatrossia pectoralis

Substrates and Products (Substrate)

Substrates Comment Substrates Organism Products Comment (Products) Rev. Reac.
Hemoglobin + H2O
-
Albatrossia pectoralis ?
-
?

Subunits

Subunits Comment Organism
monomer 1 * 35000, SDS-PAGE Albatrossia pectoralis

Temperature Optimum [°C]

Temperature Optimum [°C] Temperature Optimum Maximum [°C] Comment Organism
45
-
-
Albatrossia pectoralis

Temperature Range [°C]

Temperature Minimum [°C] Temperature Maximum [°C] Comment Organism
20 55 20°C: about 40% of maximal activity, 55°C: about 60% of maximal activity Albatrossia pectoralis

Temperature Stability [°C]

Temperature Stability Minimum [°C] Temperature Stability Maximum [°C] Comment Organism
50
-
15 min, about 10% loss of activity Albatrossia pectoralis
60
-
15 min, about 80% loss of activity Albatrossia pectoralis

Turnover Number [1/s]

Turnover Number Minimum [1/s] Turnover Number Maximum [1/s] Substrate Comment Organism Structure
50
-
hemoglobin pH 3.0, 37°C Albatrossia pectoralis

pH Optimum

pH Optimum Minimum pH Optimum Maximum Comment Organism
3
-
-
Albatrossia pectoralis

pH Range

pH Minimum pH Maximum Comment Organism
2.5 4 pH 2.5: about 55% of maximal activity, pH 4.0: about 55% of maximal activity Albatrossia pectoralis

pH Stability

pH Stability pH Stability Maximum Comment Organism
6
-
room temperature, 30 min, stable below Albatrossia pectoralis
8
-
room temperature, 30 min, about 65% loss of activity Albatrossia pectoralis