Asif-Ullah, Mufti Kim, Key-Sun Yu, Yeon Gyu 2024-01-21T03:05:08Z 2024-01-21T03:05:08Z 2021-09-01 2006-05 0031-9422 https://pubs.kist.re.kr/handle/201004/135548 Kachri fruit, Cucumis trigonus Roxburghi, contains high protease activity and has been used as meat tenderizer in the Indian subcontinent. A 67 kDa serine protease from Kachri fruit was purified by DEAE-Sepharose and CM-Sepharose chromatography, whose optimum activity was at pH 11 and 70 degrees C. Its activity was strongly inhibited by PMSF, but not by EDTA, pepstatin, or cysteine protease inhibitors. The substrate specificity of the purified protease towards synthetic peptides was comparable to cucumisin, the first characterized subtilisin class plant protease from the sarcocarp of melon fruit (Cucumis melo). These characteristics, along with the N-terminal amino acid sequence, indicated that the isolated protease from Cucumis trigonus Roxburghi is a cucumisin homologue, which belongs to the serine protease family. (c) 2006 Elsevier Ltd. All rights reserved. English PERGAMON-ELSEVIER SCIENCE LTD Purification and characterization of a serine protease from Cucumis trigonus Roxburghi Article 10.1016/j.phytochem.2006.02.020 1 PHYTOCHEMISTRY, v.67, no.9, pp.870 - 875 PHYTOCHEMISTRY 67 9 870 875 N scie scopus 000237600300004 2-s2.0-33646068371 Biochemistry & Molecular Biology Plant Sciences Biochemistry & Molecular Biology Plant Sciences Article MELON FRUITS SUBTILISIN PROTEINASE SARCOCARP SPECIFICITY GENE Cucumis trigonus Cucurbitaceae plant protease serine protease Kachri