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• W2034888462 abstract "The objective of this study was to investigate the activity of a protein identified as cysteine protease, purified from Zingiber ottensii Valeton rhizomes, in terms of antiproliferation against fungi, bacteria, and human malignant cell lines. By means of buffer extraction followed by (NH4)2SO4 precipitation and ion-exchange chromatography, the obtained dominant protein (designated F50) was submitted to non-denaturing and reducing sodium dodecyl sulfate polyacrylamide gel electrophoresis (SDS-PAGE), where a single band and three bands were revealed from eletrophoretic patterns, respectively. It could be concluded at this point that the F50 was potentially a heterotrimer or heterodimer composed of either two small (∼13.8 and ∼15.2 kD) subunits or these two together with a larger (∼32.5 kD) one. In-gel digestion was carried out for the most intense band from reducing SDS-PAGE, and to the resulting material was applied liquid chromatography (LC)–mass spectroscopy (MS)/MS. The main F50 subunit was found to contain fragments with 100% similarity to zingipain-1, a cysteine protease first discovered in Zingiber officinale. The activity corresponding to the identified data, cysteine protease, was then confirmed in the F50 by azocasein assay and a positive result was obtained. The F50 then was further investigated for antiproliferation against three plant pathogenic fungi species by disk diffusion test, four bacterial species by direct exposure in liquid culture and dish diffusion tests, and five human malignant cell lines by tissue culture assay. It was found that a dose of 23.6 µg F50/0.3 cm2 of paper disk exhibited the best inhibitory effect against Collectotrichum cassiicola, while lesser effects were found in Exserohilum turicicum and Fusarium oxysporum, respectively. No inhibitory effect against bacterial proliferation was detected in all studied bacterial strains. However, relatively strong antiproliferative effects were found against five human cell lines, with IC50 values ranging from 1.13 µg/mL (hepatoma cancer; HEP-G2) to 5.37 µg/mL (colon cancer; SW620). By periodic acid–Schiff's staining and phenol–sulfuric acid assay, the F50 was determined as a glycoprotein containing 26.30 ± 1.01% (by weight) of carbohydrate. Thus, a new glycoprotein with protease activity was successfully identified in Zingiber ottensii rhizome. The glycoprotein also contained antiproliferative activity against some plant pathogenic fungi and human cancer cell lines." @default.
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• W2034888462 date "2011-03-18" @default.
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• W2034888462 title "ZINGIPAIN, A CYSTEINE PROTEASE FROM<i>Zingiber ottensii</i>VALETON RHIZOMES WITH ANTIPROLIFERATIVE ACTIVITIES AGAINST FUNGI AND HUMAN MALIGNANT CELL LINES" @default.
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• W2034888462 doi "https://doi.org/10.1080/10826068.2011.547347" @default.
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