An extracellular protease (PrC) was purified from an isolate of Clonostachys rosea (syn. Gliocladium roseum) to apparent homogeneity. The protease had a molecular mass of 33 kDa estimated by SDS-PAGE. The optimum activity of PrC was at pH 9-10 and 60 degrees C (over 10 min). The purified protease could degrade a broad range of substrates including casein, gelatin and nematode cuticle. 80 +/- 5% of nematodes (Panagrellus redivivus) were immobilized and degraded after treating with PrC for 48 h. The protease was highly sensitive to PMSF (phenylmethyl sulfony fluoride) (5 mM) indicating it belonged to the serine protease family. The N-terminal amino acid residues of PrC are ATQSNAPWGL, which share a high degree of similarity with other cuticle-degrading proteases from nematophagous and entomopathogenic fungi suggesting PrC play a role in infection process. (c) 2005 Elsevier Ltd. All rights reserved.
基金：
Ministry of Science and Technology of China (approved No.2003CB415102,
2002BA901A21), by Natural Science Foundation of China
under Grant No.30570059 and by Department of Science and
Technology of Yunan Province (approved No. 2004C0001Z,
No.2003C0003Q)
第一作者机构：[1]Yunnan Univ, Lab Conservat & Utilizat Bioresources, Kunming 650091, Peoples R China[2]First Peoples Hosp Yunnan Prov,Dept Lab Med,Kunming 650021,Peoples R China
共同第一作者：
通讯作者：
推荐引用方式(GB/T 7714)：
Li J,Yang JK,Huang XW,et al.Purification and characterization of an extracellular serine protease from Clonostachys rosea and its potential as a pathogenic factor[J].PROCESS BIOCHEMISTRY.2006,41(4):925-929.doi:10.1016/j.procbio.2005.10.006.
APA：
Li, J,Yang, JK,Huang, XW&Zhang, KQ.(2006).Purification and characterization of an extracellular serine protease from Clonostachys rosea and its potential as a pathogenic factor.PROCESS BIOCHEMISTRY,41,(4)
MLA：
Li, J,et al."Purification and characterization of an extracellular serine protease from Clonostachys rosea and its potential as a pathogenic factor".PROCESS BIOCHEMISTRY 41..4(2006):925-929
