Activating Compound | Comment | Organism | Structure |
---|---|---|---|
adenosine 3',5'-monophosphate | i.e. cAMP, activation of nonactivated enzyme, not alone, only in the presence of Mg2+ or Mn2+ | Oryctolagus cuniculus | |
adenosine 3',5'-monophosphate | no enhancement or inhibition of this activation by various nucleotides and other compounds, overview | Oryctolagus cuniculus | |
Ca2+-dependent protease | proteolytic activation of nonactivated enzyme | Oryctolagus cuniculus | |
Ca2+-dependent protease | i.e. kinase-activating factor | Oryctolagus cuniculus | |
glycogen | activation | Oryctolagus cuniculus | |
glycogen | pH-dependent | Oryctolagus cuniculus | |
heparin | activation | Oryctolagus cuniculus | |
heparin | pH-dependent | Oryctolagus cuniculus | |
additional information | phosphorylation by protein kinases | Oryctolagus cuniculus | |
additional information | no activation by g poly-aspartic acid, hexametaphosphate, yeast nucleic acid, at pH 6.8 | Oryctolagus cuniculus | |
additional information | No activation by substrates of phosphorylase b reaction, i.e. AMP or glucose 1-phosphate | Oryctolagus cuniculus | |
additional information | the nonactivated enzyme is activated either by limited proteolysis | Oryctolagus cuniculus | |
Trypsin | at low concentration | Oryctolagus cuniculus | |
Trypsin | proteolytic activation of nonactivated enzyme | Oryctolagus cuniculus |
General Stability | Organism |
---|---|
Unstable in the presence of Mg2+ | Oryctolagus cuniculus |
Inhibitors | Comment | Organism | Structure |
---|---|---|---|
ATP | otherwise activating; total inhibition if ATP concentration exceeds that of divalent cation (i.e. Mg2+) | Oryctolagus cuniculus | |
glucose | less effective than glucose 6-phosphate, pH 8.2 | Oryctolagus cuniculus | |
glucose 6-phosphate | pH 8.2 | Oryctolagus cuniculus | |
heparin | depending on pH it inhibits or activates nonactivated enzyme | Oryctolagus cuniculus | |
Hexametaphosphate | pH 8.2 | Oryctolagus cuniculus | |
additional information | no inhibition by glucose 1-phosphate (gammadelta subunit complex); no inhibition by spermidine, spermine, F-; no inhibition by UDPglucose | Oryctolagus cuniculus | |
Polyaspartic acid | pH 8.2 | Oryctolagus cuniculus | |
protamine | pH 8.2 | Oryctolagus cuniculus | |
Zn2+ | - |
Oryctolagus cuniculus |
KM Value [mM] | KM Value Maximum [mM] | Substrate | Comment | Organism | Structure |
---|---|---|---|---|---|
additional information | - |
additional information | pH-dependence of kinetic parameters | Oryctolagus cuniculus | |
0.01 | - |
phosphorylase b | pH 7.5, in the presence of glycogen | Oryctolagus cuniculus | |
0.015 | 0.017 | phosphorylase b | activated enzyme, pH 8.2 | Oryctolagus cuniculus | |
0.03 | 0.037 | ATP | pH 8.5 | Oryctolagus cuniculus | |
0.03 | 0.037 | ATP | phosphorylase b | Oryctolagus cuniculus | |
0.03 | 0.037 | ATP | activated enzyme, pH 7.5 | Oryctolagus cuniculus | |
0.04 | - |
phosphorylase b | before activation, pH 8.2 | Oryctolagus cuniculus | |
0.12 | - |
phosphorylase b | pH 7.5 | Oryctolagus cuniculus | |
0.125 | - |
phosphorylase b | before activation, pH 7.5 | Oryctolagus cuniculus | |
0.24 | - |
ATP | nonactivated enzyme, pH 7.5 | Oryctolagus cuniculus | |
0.25 | - |
phosphorylase b | pH 7.6 | Oryctolagus cuniculus | |
0.38 | - |
ATP | activated enzyme, pH 7.5 | Oryctolagus cuniculus |
Metals/Ions | Comment | Organism | Structure |
---|---|---|---|
Mg2+ | requirement | Oryctolagus cuniculus | |
Mg2+ | major role of Mg2+: cosubstrate in Mg2+-ATP complex | Oryctolagus cuniculus | |
Mn2+ | requirement | Oryctolagus cuniculus | |
Mn2+ | can substitute for Mg2+ | Oryctolagus cuniculus | |
phosphate | requirement, phosphate containing enzyme | Oryctolagus cuniculus |
Organism | UniProt | Comment | Textmining |
---|---|---|---|
Oryctolagus cuniculus | - |
New Zealand white (female) | - |
Purification (Comment) | Organism |
---|---|
as nonactivated enzyme | Oryctolagus cuniculus |
to near homogeneity (phosphorylase b is a persistent contaminant) | Oryctolagus cuniculus |
Source Tissue | Comment | Organism | Textmining |
---|---|---|---|
skeletal muscle | - |
Oryctolagus cuniculus | - |
Specific Activity Minimum [µmol/min/mg] | Specific Activity Maximum [µmol/min/mg] | Comment | Organism |
---|---|---|---|
additional information | - |
- |
Oryctolagus cuniculus |
Storage Stability | Organism |
---|---|
Frozen, at least 6 months | Oryctolagus cuniculus |
Substrates | Comment Substrates | Organism | Products | Comment (Products) | Rev. | Reac. |
---|---|---|---|---|---|---|
ATP + phosphorylase b | cosubstrate: Mg-ATP complex | Oryctolagus cuniculus | ADP + phosphorylase a | - |
? |
Temperature Optimum [°C] | Temperature Optimum Maximum [°C] | Comment | Organism |
---|---|---|---|
30 | - |
assay at | Oryctolagus cuniculus |
pH Optimum Minimum | pH Optimum Maximum | Comment | Organism |
---|---|---|---|
additional information | - |
- |
Oryctolagus cuniculus |
Cofactor | Comment | Organism | Structure |
---|---|---|---|
ADP | activation | Oryctolagus cuniculus | |
ADP | can partially replace ATP in the activation of nonactivated enzyme | Oryctolagus cuniculus | |
ATP | activation of nonactivated enzyme by phosphorylation of subunits A and B, not C | Oryctolagus cuniculus |