Nucleoside Phosphorylase bacterial

recombinant, expressed in E. coli, ≥10 units/mg protein

Purine nucleoside phosphorylase, PNP, Purine nucleoside:orthophosphate ribosyltransferase
CAS Number:
Enzyme Commission number:
EC Number:
MDL number:
Pricing and availability is not currently available.

Quality Level


expressed in E. coli


≥80% protein basis (biuret)


lyophilized powder

specific activity

≥10 units/mg protein

sequence note


storage temp.




InChI key


Gene Information

Escherichia coli ... deoD(945654)

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Bacterial nucleoside phosphorylase has been used in a study that identified and characterized two adenosine phosphorylase activities in Mycobacterium smegmatis. Bacterial nucleoside phosphorylase has also been used in a study to investigate the inhibitionof pyrimidine and purine nucleoside phosphorylases by a 3,5-dichlorobenzoyl-substituted 2-deoxy-D-ribose-1-phosphate derivative.
Nucleoside Phosphorylase bacterial has been used in reaction buffer and buffer-exchanged to remove residual phosphate.
Nucleoside phosphorylase is used in coupled enzyme systems to measure protein dephosphorylation.


100, 250, 1000 units in poly bottle

Biochem/physiol Actions

Nucleoside Phosphorylase/purine nucleoside phosphorylase (PNP), an enzyme participates in the purine salvage pathway. It also helps in the reversible cleavage of inosine to hypoxanthine and guanosine to guanine. PNP deficiency results in neurologic manifestations.
Catalyzes the following reaction:purine nucleoside + phosphate = purine + alpha-D-ribose 1-phosphate

Unit Definition

One unit will cause the phosphorolysis of 1.0 micromole of inosine to hypoxanthine andribose-1-phosphate per min at pH 7.4 at 25 deg C.

Preparation Note

This is a salt-free and animal component-free enzyme preparation. This enzyme should be solubilized in a 10mM KPO4, pH 7.4 solution.


NONH for all modes of transport

WGK Germany


Flash Point(F)

Not applicable

Flash Point(C)

Not applicable

Certificate of Analysis
Certificate of Origin
Conformational stability and catalytic activity of PTEN variants linked to cancers and autism spectrum disorders
Johnston S B and Raines R T
Biochemistry, 54(7), 1576-1582 (2015)
Primary T-cell immunodeficiencies
Clinical Immunology (Orlando, Fla.), 54(7), 489-508 (2019)
Sean B Johnston et al.
PloS one, 10(1), e0116898-e0116898 (2015-01-22)
Phosphatase and tensin homologue deleted from chromosome ten (PTEN) is a lipid phosphatase tumor suppressor that is lost or inactivated in most human tumors. The enzyme catalyzes the hydrolysis of phosphatidylinositol-(3,4,5)-trisphosphate (PIP3) to form phosphatidylinositol-(4,5)-bisphosphate (PIP2) and inorganic phosphate. Here...
Disorders of purines and pyrimidines
Handbook of Clinical Neurology, 827-838 (2014)
S E Ealick et al.
The Journal of biological chemistry, 265(3), 1812-1820 (1990-01-25)
The three-dimensional structure of human erythrocytic purine nucleoside phosphorylase has been determined at 3.2 A resolution using x-ray diffraction data. Intensity data were measured using radiation from the Synchrotron Radiation Source, Daresbury, England, and oscillation film techniques. Phases were determined...

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