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rdf:type
lifeskim:mentions
pubmed:dateCreated
1995-4-7
pubmed:databankReference
pubmed:abstractText
Polymerase chain reaction (PCR) was used to generate DNA encoding a 60 kDa stress protein of Mycobacterium paratuberculosis using primers complementary to sequences at the 5' and 3' ends of 60 kDa stress protein genes (encoding the '65 kDa antigens') of M. leprae and M. tuberculosis. The predicted PCR product of 1.8 kb contained the entire coding sequence of an M. paratuberculosis 60 kDa stress protein, with non-coding regions of 124 bp and 1 bp at the 5' and 3' ends, respectively. DNA encoding the entire ORF for the 60 kDa stress protein, as well as thrombin and Factor Xa proteolytic cleavage sites, was ligated into the bacterial expression vector pGEX-2T and used to transform Escherichia coli strain JM83. Transformed bacteria, induced by IPTG, expressed an 85 kDa fusion protein comprising glutathione S-transferase (GST) and M. paratuberculosis 60 kDa stress protein. This fusion protein was purified by adsorption to glutathione-agarose beads and shown to cross-react in Western blot analysis with an anti-mycobacterial 60 kDa stress protein monoclonal antibody. Recombinant M. paratuberculosis 60 kDa stress protein was liberated from GST by proteolytic cleavage with either thrombin or Factor Xa enzyme. Authenticity of liberated recombinant stress protein was confirmed by N-terminal amino acid sequencing.
pubmed:language
eng
pubmed:journal
pubmed:citationSubset
IM
pubmed:chemical
pubmed:status
MEDLINE
pubmed:month
Dec
pubmed:issn
1350-0872
pubmed:author
pubmed:issnType
Print
pubmed:volume
140 ( Pt 12)
pubmed:owner
NLM
pubmed:authorsComplete
Y
pubmed:pagination
3329-36
pubmed:dateRevised
2007-11-15
pubmed:meshHeading
pubmed-meshheading:7881551-Amino Acid Sequence, pubmed-meshheading:7881551-Animals, pubmed-meshheading:7881551-Bacterial Proteins, pubmed-meshheading:7881551-Base Sequence, pubmed-meshheading:7881551-Cloning, Molecular, pubmed-meshheading:7881551-DNA, Bacterial, pubmed-meshheading:7881551-DNA Primers, pubmed-meshheading:7881551-Escherichia coli, pubmed-meshheading:7881551-Gene Expression, pubmed-meshheading:7881551-Heat-Shock Proteins, pubmed-meshheading:7881551-Molecular Sequence Data, pubmed-meshheading:7881551-Molecular Weight, pubmed-meshheading:7881551-Mycobacterium avium subsp. paratuberculosis, pubmed-meshheading:7881551-Paratuberculosis, pubmed-meshheading:7881551-Plasmids, pubmed-meshheading:7881551-Polymerase Chain Reaction, pubmed-meshheading:7881551-Recombinant Proteins, pubmed-meshheading:7881551-Restriction Mapping
pubmed:year
1994
pubmed:articleTitle
Cloning and expression in Escherichia coli of DNA encoding a 60 kDa stress protein of Mycobacterium paratuberculosis, the causative agent of Johne's disease.
pubmed:affiliation
Department of Veterinary Pathology, University of Edinburgh, Summerhall, UK.
pubmed:publicationType
Journal Article, Research Support, Non-U.S. Gov't