Abstract
The purification of poly(ADP-ribose) glycohydrolase (PARG) from overexpressing bacteria Escherichia coli is described here as a fast and reproducible one chromatographic step protocol. After cell lysis, GST-PARG-fusion proteins from the crude extract are affinity purified by a glutathione 4B sepharose chromatographic step. The PARG proteins are then freed from their GST-fusion by overnight enzymatic cleavage using the preScission protease. As described in the protocol, more than 500μg of highly active human PARG can be obtained from 1.5L of E. coli culture.
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