Expression and properties of arginyl-tRNA synthetase from jack bean (Canavalia ensiformis)
| Autor: | Emile Schiltz, Elfriede Schiefermayr, Gabor L. Igloi, Joachim Hogg |
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| Rok vydání: | 2008 |
| Předmět: |
DNA
Complementary Recombinant Fusion Proteins Molecular Sequence Data Gene Expression Aminoacylation Sodium Chloride Biology Polymerase Chain Reaction Gene expression Escherichia coli Cloning Molecular chemistry.chemical_classification Expression vector Temperature Arginine-tRNA Ligase Hydrogen-Ion Concentration biology.organism_classification Molecular biology Enzyme Activation Canavalia Transformation (genetics) Enzyme chemistry Biochemistry Cell culture Canavalia ensiformis Thioredoxin Biotechnology |
| Zdroj: | Protein Expression and Purification. 61:163-167 |
| ISSN: | 1046-5928 |
| Popis: | The coding region for arginyl-tRNA synthetase from jack bean (Canavalia ensiformis) has been sequenced and cloned into the bacterial expression vector pET32a. Transformation of BL21 cells and induction with IPTG results in the high level expression of the protein fused N-terminally with thioredoxin and bearing a His-tag. A substantial proportion of the enzyme is recovered in the soluble fraction of the cell lysate (10 mg per litre cell culture) and can be isolated with metal-affinity technology. The thioredoxin component and the His-tag portion of the fused protein could be removed with thrombin, resulting in a homogeneous product retaining an N-terminal extension of 3.2 kDa compared to the native arginyl-tRNA synthetase. Both full-length fusion and thrombin-treated products proved to be active in aminoacylation, with similar kinetic parameters. |
| Databáze: | OpenAIRE |
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