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Literature summary for 3.2.1.7 extracted from

  • Singh, R.S.; Bhermi, H.K.
    Production of extracellular exoinulinase from Kluyveromyces marxianus YS-1 using root tubers of Asparagus officinalis (2008), Biores. Technol., 99, 7418-7423.
    View publication on PubMed

Activating Compound

Activating Compound Comment Organism Structure
inulin with raw inulin in bioreactor, progressive increase in inulinase production with increase in inulin concentration up to 4.0% with a maximum inulinase activity of 50.2 IU/ml Kluyveromyces marxianus
additional information inulinase yield in bioreactor is almost 6times higher than basal medium used in shake flask. Tween-60 has no significant effect. Inoculum of 12 h old yeast culture is optimum for inulinase activity (36.9 IU/ml). 5% of 12 h old culture is optimum for the production of inulinase in the medium. Progressive increase in inulinase activity up to 37.0 IU/ml as the agitation speed is increased to 150 rpm. Maximum production of inulinase (40.2 IU/ml) after 60 h of incubation Kluyveromyces marxianus
Sodium dodecyl sulfate 0.001% is most effective for the inulinase activity (36.9 IU/ml) Kluyveromyces marxianus

Application

Application Comment Organism
industry higher inulinase activity from Kluyveromyces marxianus YS-1 is achieved by root powder extract of Asparagus officinalis. This plant material can be opted as a cheap inulin source for the production of inulinase Kluyveromyces marxianus

Inhibitors

Inhibitors Comment Organism Structure
Brij-35
-
Kluyveromyces marxianus
Cu2+ inhibitory on inulinase synthesis Kluyveromyces marxianus
Fe3+ inhibitory on inulinase synthesis Kluyveromyces marxianus
inulin beyond 4% concentration, inulinase yield declines gradually, which may be attributed to the catabolic repression caused by higher inulin concentration Kluyveromyces marxianus
additional information enzyme activity decreases subsequently and reaches to 28.2 IU/mL at pH 7.5. At pH 4.0, the enzyme activity is very low (21.8 IU/ml). At 40°C, enzyme activity decreases to 21.1 IU/ml Kluyveromyces marxianus
Sodium dodecyl sulfate beyond 0.002% it is inhibitory Kluyveromyces marxianus
Triton X-100
-
Kluyveromyces marxianus
Tween-20
-
Kluyveromyces marxianus
Tween-80
-
Kluyveromyces marxianus
Zn2+ inhibitory on inulinase synthesis Kluyveromyces marxianus

Metals/Ions

Metals/Ions Comment Organism Structure
Co2+ 2 mM significantly increases inulinase activity to nearly 110% Kluyveromyces marxianus
Mg2+ 2 mM significantly increases inulinase activity to nearly 114% Kluyveromyces marxianus
Mn2+ 2 mM significantly increases inulinase activity to nearly 125% Kluyveromyces marxianus

Organism

Organism UniProt Comment Textmining
Kluyveromyces marxianus
-
-
-
Kluyveromyces marxianus Ys-1
-
-
-

Source Tissue

Source Tissue Comment Organism Textmining

Substrates and Products (Substrate)

Substrates Comment Substrates Organism Products Comment (Products) Rev. Reac.
inulin + H2O raw inulin from Asparagus officinalis Kluyveromyces marxianus ?
-
?
inulin + H2O raw inulin from Asparagus officinalis Kluyveromyces marxianus Ys-1 ?
-
?

Synonyms

Synonyms Comment Organism
beta-D-fructan fructanohydrolase
-
Kluyveromyces marxianus

Temperature Optimum [°C]

Temperature Optimum [°C] Temperature Optimum Maximum [°C] Comment Organism
30
-
-
Kluyveromyces marxianus

pH Optimum

pH Optimum Minimum pH Optimum Maximum Comment Organism
6.5
-
-
Kluyveromyces marxianus