General Stability | Organism |
---|---|
thermostability at 60°C and pH 7 reveals that the enzyme adsorbed on ionic supports is slightly less stable than the CNBr-agarose immobilized enzyme. The enzyme immobilized on Eupergit presents a very similar stability to this preparation while the glyoxyl-agarose is much more stable than any other preparation (by around a 15-fold factor) the glyoxyl-agarose immobilized enzyme is much more stable than any other preparation in presence of ethanol | Niallia circulans |
Inhibitors | Comment | Organism | Structure |
---|---|---|---|
ethanol | the enzyme keeps very good levels of alpha-cyclodextrin activity using starch or maltodextrin as substrates even at 20% ethanol (around 55-60%). The degradation of the alpha-cyclodextrin is strongly inhibited by ethanol, even at very low concentrations | Niallia circulans |
Organism | UniProt | Comment | Textmining |
---|---|---|---|
Niallia circulans | - |
- |
- |
Niallia circulans DF 9R | - |
- |
- |
Substrates | Comment Substrates | Organism | Products | Comment (Products) | Rev. | Reac. |
---|---|---|---|---|---|---|
beta-cyclodextrin + maltose | - |
Niallia circulans | ? | - |
? | |
beta-cyclodextrin + maltose | - |
Niallia circulans DF 9R | ? | - |
? | |
maltodextrin | intramolecular transglycosylation | Niallia circulans | beta-cyclodextrin | - |
? | |
maltodextrin | intramolecular transglycosylation | Niallia circulans DF 9R | beta-cyclodextrin | - |
? | |
starch | intramolecular transglycosylation | Niallia circulans | beta-cyclodextrin | - |
? | |
starch | intramolecular transglycosylation | Niallia circulans DF 9R | beta-cyclodextrin | - |
? |
Temperature Optimum [°C] | Temperature Optimum Maximum [°C] | Comment | Organism |
---|---|---|---|
60 | - |
soluble enzyme | Niallia circulans |
65 | - |
enzyme immobilized on glyoxyl-agarose | Niallia circulans |
Temperature Minimum [°C] | Temperature Maximum [°C] | Comment | Organism |
---|---|---|---|
45 | 70 | 45°C: soluble enzyme shows about 50% of maximal activity, enzyme immobilized on glyoxyl-agarose shows about 60% of maximal activity, 70°C: soluble enzyme shows about 60% of maximal activity, enzyme immobilized on gyoxyl-agarose shows about 75% of maximal activity | Niallia circulans |
Temperature Stability Minimum [°C] | Temperature Stability Maximum [°C] | Comment | Organism |
---|---|---|---|
25 | - |
if submitted to strong stirring, promoting the apparition of gas bubbles and shear forces, the enzyme becomes inactivated at 25°C. This inactivation does not occur if the enzyme is immobilized on any porous support | Niallia circulans |
55 | - |
half-life of soluble enzyme at pH 7 is 1.5 h. The immobilization of the enzyme on CNBr-agarose does not promote an increment in the stability of the enzyme at 55°C, although it prevents the effect of the stirred system | Niallia circulans |
pH Optimum Minimum | pH Optimum Maximum | Comment | Organism |
---|---|---|---|
5.5 | - |
enzyme immobilized on glyoxyl-agarose and free enzyme present similar pH/activities profiles, with two peaks at pH values of 5.5 and 7 and a minimum at pH 6.0-6.5 in both amylolytic and CGTase activities | Niallia circulans |
7 | - |
enzyme immobilized on glyoxyl-agarose and free enzyme present similar pH/activities profiles, with two peaks at pH values of 5.5 and 7 and a minimum at pH 6.0-6.5 in both amylolytic and CGTase activities | Niallia circulans |
pH Minimum | pH Maximum | Comment | Organism |
---|---|---|---|
4 | 9 | enzyme immobilized on glyoxyl-agarose and free enzyme present similar pH/activities profiles, with two peaks at pH values of 5.5 and 7 and a minimum at pH 6.0-6.5 in both amylolytic and CGTase activities. Activities decrease after these two maximum values. The glyoxyl CGTase retains 30% of amylase activity at pH 4 and 50% at pH 9. The soluble enzyme retains 10% and 30%, respectively. In synthetic activities differences are not significant | Niallia circulans |