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Literature summary extracted from

  • Gibson, W.B.; Illingworth Brown, B.; Brown, D.H.
    Studies of glycogen branching enzyme. Preparation and properties of alpha-1,4-glucan- alpha-1,4-glucan 6-glycosyltransferase and its action on the characteristic polysaccharide of the liver of children with Type IV glycogen storage disease (1971), Biochemistry, 10, 4253-4262.
    View publication on PubMed

Activating Compound

EC Number Activating Compound Comment Organism Structure
2.4.1.18 citrate 0.15 M sodium citrate, 2fold stimulation Oryctolagus cuniculus
2.4.1.18 potassium alpha-D-glucose 1-phosphate 0.05 M, 2fold stimulation Oryctolagus cuniculus

General Stability

EC Number General Stability Organism
2.4.1.18 urea, 2 M irreversible denaturation Oryctolagus cuniculus

Inhibitors

EC Number Inhibitors Comment Organism Structure
2.4.1.18 maltoheptaose 40% inhibition at 15 mM Oryctolagus cuniculus
2.4.1.18 maltohexaose
-
Oryctolagus cuniculus
2.4.1.18 maltononaose
-
Oryctolagus cuniculus
2.4.1.18 maltooctaose
-
Oryctolagus cuniculus
2.4.1.18 Urea 50% inhibition at 0.4 M, complete inhibition at 2 M. Up to 2 M, reversible inhibition Oryctolagus cuniculus

KM Value [mM]

EC Number KM Value [mM] KM Value Maximum [mM] Substrate Comment Organism Structure
2.4.1.18 0.0056
-
amylopectin pH 6.4, 30°C, type IV amylopectin Oryctolagus cuniculus

Molecular Weight [Da]

EC Number Molecular Weight [Da] Molecular Weight Maximum [Da] Comment Organism
2.4.1.18 92000 103000 sucrose density gradient centrifugation Oryctolagus cuniculus

Organism

EC Number Organism UniProt Comment Textmining
2.4.1.18 Oryctolagus cuniculus
-
-
-

Purification (Commentary)

EC Number Purification (Comment) Organism
2.4.1.18
-
Oryctolagus cuniculus

Source Tissue

EC Number Source Tissue Comment Organism Textmining
2.4.1.18 skeletal muscle
-
Oryctolagus cuniculus
-

Specific Activity [micromol/min/mg]

EC Number Specific Activity Minimum [µmol/min/mg] Specific Activity Maximum [µmol/min/mg] Comment Organism
2.4.1.18 306
-
-
Oryctolagus cuniculus

Substrates and Products (Substrate)

EC Number Substrates Comment Substrates Organism Products Comment (Products) Rev. Reac.
2.4.1.18 amylopectin
-
Oryctolagus cuniculus ?
-
?

Temperature Optimum [°C]

EC Number Temperature Optimum [°C] Temperature Optimum Maximum [°C] Comment Organism
2.4.1.18 30 35
-
Oryctolagus cuniculus

Temperature Range [°C]

EC Number Temperature Minimum [°C] Temperature Maximum [°C] Comment Organism
2.4.1.18 22 45 22°C: about 50% of maximal activity, 45°C: about 60% of maximal activity Oryctolagus cuniculus

pH Optimum

EC Number pH Optimum Minimum pH Optimum Maximum Comment Organism
2.4.1.18 6.8 7.4 citrate buffer Oryctolagus cuniculus
2.4.1.18 7.2 7.6 glucose 1-phosphate buffer Oryctolagus cuniculus
2.4.1.18 7.4
-
-
Oryctolagus cuniculus