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Cloning and expression of the nucleocapsid gene of virulent Kabete O strain of rinderpest virus in baculovirus: use in differential diagnosis between vaccinated and infected animals.

Abstract
Rinderpest (RP) is a viral disease of ruminants with > 95% morbidity and mortality. We have cloned the cDNA of the nucleocapsid (N) gene of the virulent Kabete O strain of rinderpest virus (RPVK) and compared its nucleotide and deduced amino acid sequences with those of the N genes of the lapinized strain of rinderpest virus (RPVL), measles virus (MV), and canine distemper virus (CDV). The gene has an open reading frame of 1575 nucleotides and encodes a protein of 525 amino acids with a molecular weight of 59 kDa. The nucleotide sequence of the coding region of the N gene of RPVK is 88.6, 68.9, and 63.2% homologous with N genes of RPVL, MV, and CDV, respectively. We have developed a recombinant baculovirus that expresses the N protein (rRVN) of RPVK in insect cells (Sf9) and larvae (Spodoptera frugiperda). rRVN was used as a coating antigen in an ELISA to distinguish vaccinated animals from those infected with RPV and was also used successfully in the diagnosis of two other morbilliviruses, MV and peste des petits ruminants (PPRV). Crude lysate of a single infected larva (0.2-0.3 g) was sufficient to coat 150 ELISA plates for serological diagnosis of 7200 serum samples in duplicate.
AuthorsT Ismail, S Ahmad, M D'Souza-Ault, M Bassiri, J Saliki, C Mebus, T Yilma
JournalVirology (Virology) Vol. 198 Issue 1 Pg. 138-47 (Jan 1994) ISSN: 0042-6822 [Print] UNITED STATES
PMID8259649 (Publication Type: Journal Article, Research Support, Non-U.S. Gov't, Research Support, U.S. Gov't, Non-P.H.S.)
Chemical References
  • Viral Core Proteins
  • Viral Structural Proteins
Topics
  • Amino Acid Sequence
  • Animals
  • Base Sequence
  • Capsid (analysis, genetics)
  • Cattle
  • Cells, Cultured
  • Cloning, Molecular
  • Diagnosis, Differential
  • Enzyme-Linked Immunosorbent Assay
  • Gene Expression
  • Genes, Viral
  • Genetic Vectors
  • Molecular Sequence Data
  • Moths (microbiology)
  • Nucleopolyhedrovirus (genetics)
  • Recombination, Genetic
  • Rinderpest (diagnosis, microbiology)
  • Rinderpest virus (genetics)
  • Viral Core Proteins (analysis, genetics)
  • Viral Structural Proteins (genetics)

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