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Prokaryotic expression of chloride channel ClC-2 fusion protein and its phosphorylation in vitro / 中国免疫学杂志
Chinese Journal of Immunology ; (12)2000.
Article in Chinese | WPRIM | ID: wpr-544145
ABSTRACT

Objective:

To investigate if chloride channel ClC-2 could be phosphorylated by mitogen activated protein kinase(MAPK) for further study of its regulation mechanism in proliferation and differentiation of cells.

Methods:

The coding sequence containing the cytosolic C-terminus of ClC-2 was amplified from pSPORT1/ClC-2 plasmid,including rabbit ClC-2 cDNA, by polymerase chain reaction(PCR),the fragment was cloned into pGEX-4T-1 plasmid for the construction of GST-tagged fusion protein expressing vector, pGEX-4T-1/ClC-2CT.After being identified by enzyme digestion and sequencing, the recombinant vector was transformed into a strain of E.coli BL21. The expression of GST-tagged fusion protein was induced with IPTG and purified with Gluthathion Sepharose 4B affinity chromatography. Then the phosphorylation of ClC-2 by MAPK was examined by using phosphorylation assays in vitro.

Results:

The construction of pGEX-4T-1/ClC-2CT recombinant vector was proved by enzyme digestion and sequencing. The purified fusion protein GST/ClC-2CT could be phosphorylated by MAPK, however the GST could not.

Conclusion:

Chloride channel ClC-2 can be phosphorylated by MAPK.

Full text: Available Index: WPRIM (Western Pacific) Language: Chinese Journal: Chinese Journal of Immunology Year: 2000 Type: Article

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Full text: Available Index: WPRIM (Western Pacific) Language: Chinese Journal: Chinese Journal of Immunology Year: 2000 Type: Article