Banthari ChotimanothumThanaporn PinpartLertluk NgernsiriKasetsart UniversityMahidol University2018-05-032018-05-032011-09-01ScienceAsia. Vol.37, No.3 (2011), 205-213151318742-s2.0-80053113989https://repository.li.mahidol.ac.th/handle/20.500.14594/12910The immediate early 1 (ie-1) gene is essential for DNA replication of nucleopolyhedrosis virus. Here, the gene ie-1 from nucleopolyhedrovirus (Nanglai-BmNPV) infecting a local silkworm (Bombyx mori), Nanglai strain, was cloned and sequenced. The gene contained a 1755 bp open reading frame encoding a deduced protein of 584 amino acids, molecular weight 66.9 kDa, and isoelectric point 5.79. The nucleotide and amino acid sequences of Nanglai-BmNPV ie-1 gene showed, respectively, 98 and 97% identity to those of the BmNPV ie-1 genes. The identity of the Nanglai-BmNPV IE-1 deduced amino acid sequence with IE-1 protein sequences of other 37 known Lepidopteran NPVs varied from 20% up to 97%. The phylogenic tree established with the IE-1 protein sequences of the Lepidopteran NPVs showed similar topology to those previously reported using highly conserved genes. Interestingly, the tree obtained with IE-1 clearly shows that the Lepidopteran NPVs group II clade can be subdivided into three subgroups.Mahidol UniversityMultidisciplinaryArticleSCOPUS10.2306/scienceasia1513-1874.2011.37.205