The genomic region of the multiple nucleocapsid nuclear polyhedrosis virus (AgMNPV) strain 2D encoding the polyhedrin gene was cloned and mapped, and a 2085 bp I-I fragment containing the gene was sequenced. The polyhedrin polypeptide of the parental isolate AgMNPV was manually sequenced, and the amino acid sequence obtained agreed with that deduced from the DNA coding region sequence. AgMNPV and MNPV (OpMNPV) are similar in terms of promoter structure and polyhedrin primary sequence, and the polyhedrin gene of both viruses is transcribed in the anti-clockwise direction in relation to their physical maps. The region upstream from the polyhedrin gene of AgMNPV, OpMNPV, NPV and MNPV (AcMNPV) was compared and this showed that the open reading frame (ORF) common to all four viruses (ORF 5) has sequence homology with the AcMNPV 25K gene. The sequences between ORF 5 and the polyhedrin gene were found to be variable among the polyhedrin gene loci compared. Additionally, conserved elements in the promoters of the very late genes encoding polyhedrin and granulin, and those encoding two p10 proteins were found to share sequence homology and positional similarity with consensus regions in the conserved boxes A and C, responsible for binding transcription factors to eukaryotic 5S ribosomal RNA genes, and to box C of tRNA genes.


Article metrics loading...

Loading full text...

Full text loading...


Most cited this month Most Cited RSS feed

This is a required field
Please enter a valid email address
Approval was a Success
Invalid data
An Error Occurred
Approval was partially successful, following selected items could not be processed due to error