Product Name

Thymidine Phosphorylase, recombinant from Escherichia coli

General deion

Thymidine phosphorylase inhibits vascular smooth muscle cell proliferation.

Synonym

Thymidine:orthophosphate deoxy-D-ribosyltransferase

Assay

recombinant, expressed in E. coli, buffered aqueous solution, ≥900 units/mL, aseptically filled

CAS Number

9030-23-3

MDL number

MFCD00132426

Suitability

BioReagent

l Physical and Chemical Information

Appearance

buffered aqueous solution

Physical form

Solution in 0.5 M potassium phosphate containing 2 mM uracil, 0.02% sodium azide and bovine serum albumin

l Biological Information

Biochem/Physiol Actions

An enzyme that catalyzes the reversible conversion of thymidine to thymine. Thymidine phosphorylase is part of the pyrimidine nucleoside salvage pathway. This pathway allows pyrimidine bases to be recycled for nucleotide biosynthesis, while the pentose 1-phosphates are converted to intermediates of the pentose phosphate shunt and glycolysis. The E. coli thymidine phosphorylase shares 40% sequence homology with the human sequence, which has been found to be identical to the angiogenic agent platelet-derived endothelial growth factor. The purified E. coli enzyme has been shown to stimulate blood vessel growth in chick chorioallantoic membrane assays.

Application

Thymidine phosphorylase has been used in a study to evaluate biomarkers for advanced breast cancer patients treated with capecitabine-based first-line chemotherapy. Thymidine phosphorylase has also been used in a study to investigate implications for the clinical efficacy of nucleoside analogues.

Preparation Note

loned from E. coli and produced in overexpressing E. coli

Unit Definition

One unit will convert 1.0 μmole each of thymidine and phosphate to thymine and 2-deoxyribose 1-phosphate per min at pH 7.4 at 25°C.

l Storage

Storage temp.

2-8°C

l Precautions and Disclaimer

This product is for R&D use only, not for drug, household, or other uses.

l References

1. http://www.drugbank.ca

2. https://ncit.nci.nih.gov

3. https://www.ncbi.nlm.nih.gov