Refolding and activation of human prorenin expressed in Escherichia coli: Application of recombinant human renin for inhibitor screening

Human prorenin was expressed in Escherichia coli as a fusion protein of thioredoxin. The chimeric protein, which accumulated insoluble inclusion bodies, was solubilized in 4 M guanidine-HCl and refolded by an arginine-detergent buffer system and by systematic dialysis. The refolded fusion prorenin w...

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Veröffentlicht in:Bioscience, biotechnology, and biochemistry biotechnology, and biochemistry, 2006-12, Vol.70 (12), p.2913-2918
Hauptverfasser: Takahashi, S.(Akita-ken. Research Inst. of Food and Brewing (Japan)), Ogasawara, H, Watanabe, T, Kumagai, M, Inoue, H, Hori, K
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Sprache:eng
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Zusammenfassung:Human prorenin was expressed in Escherichia coli as a fusion protein of thioredoxin. The chimeric protein, which accumulated insoluble inclusion bodies, was solubilized in 4 M guanidine-HCl and refolded by an arginine-detergent buffer system and by systematic dialysis. The refolded fusion prorenin was activated by trypsin. The antiserum against human kidney renin specifically inhibited the recombinant human renin activity. Using the recombinant human renin, we screened its inhibitory activity in fermented soybean paste (miso) and demonstrated that miso contained renin inhibitory activity derived from soybean. The ICsub(50) values for soybean and steamed soybean extracts were determined to be 1.9 and 1.6 mg/ml, respectively. This is the first demonstration of renin inhibitory activity in miso and soybean.
ISSN:0916-8451
1347-6947
DOI:10.1271/bbb.60334