Recombinant Zebrafish γ-Glutamyl Hydrolase Exhibits Properties and Catalytic Activities Comparable with Those of Mammalian Enzyme
| Autor: | Guey Yueh Shi, Hua Lin Wu, Tzu N. Fu, Wen Ni Chang, Tseng Ting Kao |
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| Rok vydání: | 2008 |
| Předmět: |
Protein Conformation
EcoRI Pharmaceutical Science Biology law.invention Endopeptidase activity law Catalytic Domain Complementary DNA Hydrolase Animals Amino Acid Sequence Zebrafish Mammals Pharmacology chemistry.chemical_classification Substrate (chemistry) gamma-Glutamyl Hydrolase Zebrafish Proteins Molecular biology Fusion protein Recombinant Proteins Enzyme chemistry Biochemistry Recombinant DNA biology.protein Genetic Engineering |
| Zdroj: | Drug Metabolism and Disposition. 37:302-309 |
| ISSN: | 1521-009X 0090-9556 |
| DOI: | 10.1124/dmd.108.024042 |
| Popis: | A cDNA encoding for zebrafish gamma-glutamyl hydrolase (gammaGH) was cloned and inserted into a pET43.1a vector via SmaI and EcoRI sites and expressed in Rosetta (DE3) cells as a Nus-His-tag fusion enzyme (NH-zgammaGH). After induction with isopropyl thiogalactoside, the enzyme was purified with a Ni-Sepharose column, and approximately 8 mg of pure enzyme was obtained per liter of culture. The primary sequence of the recombinant zgammaGH was similar to mammalian gammaGH. Thrombin digestion of this NH-zgammaGH fusion protein resulted in zgammaGH with approximately 2-fold higher catalytic activity compared with the NH-zgammaGH fusion enzyme. This recombinant zgammaGH is active and exhibits comparable endopeptidase activity with folate substrate and antifolate drug methotrexate. Use of this recombinant zgammaGH significantly increased efficiency in folylpolyglutamate hydrolysis for folate analysis compared with current protocols. |
| Databáze: | OpenAIRE |
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