A6535

Apyrase from potatoes

ATPase ≥200 units/mg protein, lyophilized powder

• Synonym(s): Adenosine 5′-diphosphatase, Adenosine 5′-triphosphatase
• CAS Number: 9000-95-7
• UNSPSC Code: 12352204
• NACRES: NA.54
• EC Number: 232-569-8
• MDL number: MFCD00130542
• EC Number: 3.6.1.5 (BRENDA, IUBMB)

Properties

• type: Grade VII
• Quality Segment: 300
• form: lyophilized powder
• ATPase activity: ≥200 units/mg protein
• secondary activity: ≥50 % of base activity ADPase
• composition: Protein, 25-60%
• solubility: H₂O: soluble 1.0 mg/mL
• application(s): diagnostic assay manufacturing
• foreign activity: Acid Phosphatase ≤2% of base activity
• storage temp.: −20°C

Description

Application

At least two isoenzymes are found in different varieties of S. tuberosum: one with a high ATPase/ADPase ratio (∼10) and another with a low ratio (∼1).
Reaction: ATP → ADP+P_i → AMP+2P_i.

Apyrase is used to hydrolyze nucleoside triphosphates and diphosphates. For hydrolysis of organic di and triphosphates, the optimal pH is 6, and for inorganic substrates, the optimal pH is 5.1. Apyrase, from Sigma, has been used in inhibition studies of platelet-aggregation .

Biochem/physiol Actions

Apyrase is found in all eukaryotes and some prokaryotes. Apyrase, from potato, has a crucial role in regulating growth and development. Apyrase is involved in the inactivation of synaptic ATP as a neurotransmitter following nerve stimulation and in the inhibition of ADP induced platelet aggregation to prevent thrombosis . Divalent metal ions are required for activity and best activity is observed with calcium ion at 5 mM.

Packaging

Sold on the basis of ATPase units.

Physical form

Partially purified, lyophilized powder containing potassium succinate buffer salts.

Preparation Note

Derived from red potato

Other Notes

One unit will liberate 1.0 μmole of inorganic phosphate from ATP or ADP per min at pH 6.5 at 30 °C.

This grade has a low ATPase/ADPase ratio.

Safety Information

• pictograms: GHS08
• signalword: Danger
• hcodes: H334
• pcodes: P261 - P284 - P501
• Hazard Classifications: Resp. Sens. 1
• Storage Class: 11 - Combustible Solids
• wgk: WGK 1
• flash_point_f: Not applicable
• flash_point_c: Not applicable
• ppe: Eyeshields, Gloves, type N95 (US)