Linked Life Data

18092178

Source:http://linkedlifedata.com/resource/pubmed/id/18092178

Statements in which the resource exists as a subject.
PredicateObject
rdf:type
lifeskim:mentions
pubmed:issue
4
pubmed:dateCreated
2008-2-21
pubmed:abstractText
Protease activities in extracts of Opisthorchis viverrini were investigated using gelatin zymography and fluorogenic peptide substrates. Using gelatin-impregnated X-ray film, 2 microg of O. viverrini excretory-secretory products (Ov-ES) and adult somatic extract (Ov-SE) showed proteolytic activity. Zymography of both O. viverrini extracts revealed bands at approximately 30 kDa. Using fluorogenic peptide substrates, the majority of O. viverrini activity was determined to be cathepsin L-like cysteine protease (cleaved Z-Phe-Arg-aminomethylcoumarin (AMC)) whereas little or no activity was ascribable to other classes of proteases. The O. viverrini cysteine protease activity was greatest at pH 6.0 and the activity was inhibited by the class-specific inhibitors, E-64 and Z-Ala-CHN2. Chromatographic purification of O. viverrini cysteine proteases on thiol-sepharose enriched for protein(s) of approximately 30 kDa from Ov-ES and Ov-SE. The activity profile of the purified enzyme was similar to that of the cathepsin L-like activity characterized in Ov-SE and Ov-ES. Furthermore, determination of cysteine protease activity in several developmental stages of the parasite revealed the highest protease activity in metacercariae soluble extract, followed by Ov-ES, egg soluble extract, and Ov-SE. These findings demonstrated that O. viverrini has a cathepsin L-like cysteine protease(s) and suggested that abundant cysteine protease activity was present in metacercariae where the hydrolase might be involved in cyst excystation during mammalian infection.
pubmed:grant
pubmed:language
eng
pubmed:journal
pubmed:citationSubset
IM
pubmed:chemical
pubmed:status
MEDLINE
pubmed:month
Mar
pubmed:issn
0932-0113
pubmed:author
pubmed:issnType
Print
pubmed:volume
102
pubmed:owner
NLM
pubmed:authorsComplete
Y
pubmed:pagination
757-64
pubmed:dateRevised
2011-9-26
pubmed:meshHeading
pubmed:year
2008
pubmed:articleTitle
Characterization of cysteine proteases from the carcinogenic liver fluke, Opisthorchis viverrini.
pubmed:affiliation
Graduate School, Khon Kaen University, Khon Kaen, Thailand.
pubmed:publicationType
Journal Article, Research Support, Non-U.S. Gov't, Research Support, N.I.H., Extramural