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Literature summary for 4.2.2.25 extracted from

  • Derekova, A.; Sjøholm, C.; Mandeva, R.; Michailova, L.; Kambourova, M.
    Biosynthesis of a thermostable gellan lyase by newly isolated and characterized strain of Geobacillus stearothermophilus 98 (2006), Extremophiles, 10, 321-326.
    View publication on PubMed

Activating Compound

Activating Compound Comment Organism Structure
CaCl2 1 mM, 1.4fold activation Geobacillus stearothermophilus
FeCl2 1 mM, 1.2fold activation Geobacillus stearothermophilus
KCl 1 mM, 1.4fold activation Geobacillus stearothermophilus
Li2SO4 1 mM, 1.3fold activation Geobacillus stearothermophilus
MgCl2 1 mM, 1.4fold activation Geobacillus stearothermophilus
MnCl2 1 mM, 1.4fold activation Geobacillus stearothermophilus

Inhibitors

Inhibitors Comment Organism Structure
Cu2+ 1 mM, 50% inhibition Geobacillus stearothermophilus
EDTA 1 mM, 22% inhibition Geobacillus stearothermophilus
N-bromosuccinimide 1 mM, 81% inhibition Geobacillus stearothermophilus
p-chloromercuribenzoate 1 mM, 39% inhibition Geobacillus stearothermophilus
sodium lauryl sulfate 1 mM, 81% inhibition Geobacillus stearothermophilus
Urea 1 mM, 22% inhibition Geobacillus stearothermophilus

Localization

Localization Comment Organism GeneOntology No. Textmining
extracellular the strain produces thermostable gellan lyase extracellularly during exponential phase Geobacillus stearothermophilus
-
-

Molecular Weight [Da]

Molecular Weight [Da] Molecular Weight Maximum [Da] Comment Organism
120000
-
3 * or 4 * 120000, SDS-PAGE Geobacillus stearothermophilus
350000
-
two protein bands are observed: 350000 Da and 480000 Da, non-denaturing gel electrophoresis Geobacillus stearothermophilus
480000
-
two protein bands are observed: 350000 Da and 480000 Da, non-denaturing gel electrophoresis Geobacillus stearothermophilus

Organism

Organism UniProt Comment Textmining
Geobacillus stearothermophilus P85513 isolated from Bulgarian hot spring
-
Geobacillus stearothermophilus 98 P85513 isolated from Bulgarian hot spring
-

Purification (Commentary)

Purification (Comment) Organism
-
Geobacillus stearothermophilus

Specific Activity [micromol/min/mg]

Specific Activity Minimum [µmol/min/mg] Specific Activity Maximum [µmol/min/mg] Comment Organism
0.99
-
pH 7.0, 70°C Geobacillus stearothermophilus

Substrates and Products (Substrate)

Substrates Comment Substrates Organism Products Comment (Products) Rev. Reac.
gellan
-
Geobacillus stearothermophilus ?
-
?
gellan
-
Geobacillus stearothermophilus 98 ?
-
?

Subunits

Subunits Comment Organism
? 3 * or 4 * 120000, SDS-PAGE Geobacillus stearothermophilus

Temperature Optimum [°C]

Temperature Optimum [°C] Temperature Optimum Maximum [°C] Comment Organism
70
-
-
Geobacillus stearothermophilus

Temperature Stability [°C]

Temperature Stability Minimum [°C] Temperature Stability Maximum [°C] Comment Organism
60
-
24 h, stable Geobacillus stearothermophilus
70
-
half-life: 50 min in absence of substrate. Stable for 2.5 h in presence of substrate Geobacillus stearothermophilus

pH Optimum

pH Optimum Minimum pH Optimum Maximum Comment Organism
5 8
-
Geobacillus stearothermophilus

Expression

Organism Comment Expression
Geobacillus stearothermophilus enzyme activity increases tenfold in conditions of continuous cultivation compared to data from batch fermentations and enzyme productivity is almost sixfold higher up