Benesová M, Durcová G, Kuzela S, Kutejová E, Psenák M. Spinach chloroplast ATP-dependent endopeptidase: Ti-like protease.
PHYTOCHEMISTRY 1996;
41:65-69. [PMID:
8588875 DOI:
10.1016/0031-9422(95)00613-3]
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Abstract
The soluble fraction of spinach chloroplast was used for purification and characterization of an ATP-dependent protease. Purification included Q Sepharose Fast Flow, hydroxylapatite and FPLC Superose 6 column chromatography. The isolated enzyme requires ATP and Mg2+ for stimulation and represents a ubiquitin independent serine protease, containing essential sulphydryl group(s). By using fluorogenic peptides a similarity of chloroplast protease to Escherichia coli Ti protease was observed. The chloroplast protease is immunochemically cross-reactive with the bacterial protease Ti.
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