Linked Life Data

2658302

Source:http://linkedlifedata.com/resource/pubmed/id/2658302

Statements in which the resource exists as a subject.
PredicateObject
rdf:type
lifeskim:mentions
pubmed:issue
2
pubmed:dateCreated
1989-7-12
pubmed:databankReference
pubmed:abstractText
The nucleotide sequence of the small nuclear inclusion protein (NIa)-like cistron of plum pox potyvirus (PPV) has been determined. Viral proteolytic activity was expressed in Escherichia coli cells harboring plasmids with a PPV cDNA insert approximately 7000 nt long. Free PPV capsid protein was detected in these cells, but it was not produced when a mutation was introduced in the PPV cDNA insert which induced a Gln to Pro substitution at the large nuclear inclusion protein (NIb)-capsid protein junction. By mutational analysis, the NIa-like protein was determined to be responsible for the proteolytic activity. A Gln to Ser substitution at the presumed NIa-NIb junction, which inhibited proteolytic processing at the carboxyl end of the protease, had no effect on proteolytic cleavage at the NIb-capsid protein junction. In contrast with the high efficiency of proteolytic processing at the NIb-capsid protein cleavage site, processing at the ends of the PPV protease was not complete, suggesting that the PPV polyprotein, like that of other potyviruses, contains cleavage sites with different properties.
pubmed:language
eng
pubmed:journal
pubmed:citationSubset
IM
pubmed:chemical
pubmed:status
MEDLINE
pubmed:month
Jun
pubmed:issn
0042-6822
pubmed:author
pubmed:issnType
Print
pubmed:volume
170
pubmed:owner
NLM
pubmed:authorsComplete
Y
pubmed:pagination
362-9
pubmed:dateRevised
2007-11-15
pubmed:meshHeading
pubmed:year
1989
pubmed:articleTitle
Proteolytic activity of the plum pox potyvirus NIa-like protein in Escherichia coli.
pubmed:affiliation
Centro de Biología Molecular (CSIC-UAM), Universidad Autónoma de Madrid, Spain.
pubmed:publicationType
Journal Article, Research Support, Non-U.S. Gov't