Inhibitors | Comment | Organism | Structure |
---|---|---|---|
pepstatin | - |
Micropterus salmoides |
KM Value [mM] | KM Value Maximum [mM] | Substrate | Comment | Organism | Structure |
---|---|---|---|---|---|
0.02 | - |
hemoglobin | isoform PG2-2, at pH 3.0 and 37°C | Micropterus salmoides | |
0.0344 | - |
Substance P | isoform PG2-2, at pH 3.0 and 37°C | Micropterus salmoides | |
0.039 | - |
hemoglobin | isoform PG1-1, at pH 3.0 and 37°C | Micropterus salmoides | |
0.698 | - |
Substance P | isoform PG1-1, at pH 3.0 and 37°C | Micropterus salmoides |
Organism | UniProt | Comment | Textmining |
---|---|---|---|
Micropterus salmoides | - |
- |
- |
Purification (Comment) | Organism |
---|---|
DEAE Sephacel column chromatography, Sephadex G-100 gel filtration, and Mono Q column chromatography | Micropterus salmoides |
Source Tissue | Comment | Organism | Textmining |
---|---|---|---|
gastric mucosa | - |
Micropterus salmoides | - |
Substrates | Comment Substrates | Organism | Products | Comment (Products) | Rev. | Reac. |
---|---|---|---|---|---|---|
Hemoglobin + H2O | - |
Micropterus salmoides | ? | - |
? | |
oxidized insulin B chain + H2O | the cleavage specificities clarified with oxidized insulin B chain are restricted to a few bonds consisting of hydrophobic/aromatic residues, such as the Leu15-Tyr16, Phe24-Phe25 and Phe25-Tyr26 bonds | Micropterus salmoides | FVNQHLCGSHLVEAL + YLVCGERGFFYTPKA | - |
? | |
Substance P + H2O | RPKPQQFFGLM | Micropterus salmoides | ? | - |
? |
Subunits | Comment | Organism |
---|---|---|
? | x * 39000, isoform PG1-1, SDS-PAGE | Micropterus salmoides |
? | x * 41000, isoform PG2-2, SDS-PAGE | Micropterus salmoides |
Synonyms | Comment | Organism |
---|---|---|
PG1-1 | isoform | Micropterus salmoides |
PG2-2 | isoform | Micropterus salmoides |
Temperature Optimum [°C] | Temperature Optimum Maximum [°C] | Comment | Organism |
---|---|---|---|
40 | - |
isoform PG2-2 | Micropterus salmoides |
50 | - |
isoform PG1-1 | Micropterus salmoides |
Turnover Number Minimum [1/s] | Turnover Number Maximum [1/s] | Substrate | Comment | Organism | Structure |
---|---|---|---|---|---|
38.8 | - |
Substance P | isoform PG2-2, at pH 3.0 and 37°C | Micropterus salmoides | |
52.7 | - |
hemoglobin | isoform PG1-1, at pH 3.0 and 37°C | Micropterus salmoides | |
61 | - |
Substance P | isoform PG1-1, at pH 3.0 and 37°C | Micropterus salmoides | |
62.9 | - |
hemoglobin | isoform PG2-2, at pH 3.0 and 37°C | Micropterus salmoides |
pH Optimum Minimum | pH Optimum Maximum | Comment | Organism |
---|---|---|---|
1.5 | - |
isoform PG1-1, for hemoglobin digestion | Micropterus salmoides |
2 | - |
isoform PG2-2, for hemoglobin digestion | Micropterus salmoides |
pH Minimum | pH Maximum | Comment | Organism |
---|---|---|---|
1.5 | 3.5 | highly active between pH 1.5-3.5 | Micropterus salmoides |
pH Stability | pH Stability Maximum | Comment | Organism |
---|---|---|---|
2 | - |
at pH 2.0 and 14°C, isoform PG1-1 and PG2-2 are converted through intermediate forms into their respective pepsins. While the intermediate form of PG1-1 is rather stable, as the enzyme remained in that form for more than 60 min, the intermediate form of PG2-2 is converted to pepsin rapidly | Micropterus salmoides |
kcat/KM Value [1/mMs-1] | kcat/KM Value Maximum [1/mMs-1] | Substrate | Comment | Organism | Structure |
---|---|---|---|---|---|
91 | - |
Substance P | isoform PG1-1, at pH 3.0 and 37°C | Micropterus salmoides | |
1140 | - |
Substance P | isoform PG2-2, at pH 3.0 and 37°C | Micropterus salmoides | |
1600 | - |
hemoglobin | isoform PG1-1, at pH 3.0 and 37°C | Micropterus salmoides | |
3500 | - |
hemoglobin | isoform PG2-2, at pH 3.0 and 37°C | Micropterus salmoides |