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10. Molecular isolation and characterization of a novel occlusion body protein gene from Penaeus monodon nucleopolyhedrovirus.

Author

Chaivisuthangkura P, Tawilert C, Tejangkura T, Rukpratanporn S, Longyant S, Sithigorngul W, and Sithigorngul P

Subjects
Amino Acid Sequence, Animals, Antibodies, Viral, Antibody Specificity, Base Sequence, Blotting, Western, Chromatography, Liquid, Gene Library, Hepatopancreas virology, Mass Spectrometry, Molecular Sequence Data, Open Reading Frames, Recombinant Proteins immunology, Recombinant Proteins metabolism, Sequence Alignment, Viral Proteins immunology, Viral Proteins isolation & purification, Gene Expression Regulation, Viral, Nucleopolyhedroviruses genetics, Nucleopolyhedroviruses metabolism, Penaeidae virology, Viral Proteins genetics, Viral Proteins metabolism
Abstract

The full-length of the occlusion body (OB) protein gene of Penaeus monodon nucleopolyhedrovirus (PemoNPV) was successfully isolated. The OB gene sequence contained an open reading frame (ORF) of 1359 nucleotides encoding a protein of 452 amino acid residues with a predicted molecular mass of 50.6 kDa. A putative late promoter element, TAAG, was identified 72 nt upstream of the translation start site. The amino acid sequences of tryptic digested peptides of PemoNPV OB protein obtained from LC-MS analysis matched quite well with various regions of deduced amino acid sequences. Recombinant PemoNPV OB proteins specifically reacted with monoclonal antibodies to PemoNPV OB protein. After comparison with nucleotide database, the PemoNPV OB ORF demonstrated 67% identity to an uncharacterized ORF of a baculovirus pathogenic for Penaeus vannamei. However, comparison against protein databases revealed no significant homology to other known proteins. To our knowledge, this PemoNPV OB gene is the first isolated and characterized gene of nucleopolyhedrovirus from shrimp.

Published
2008
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