Abstract
Nosema bombycis is a spore-forming parasite causing microsporidiosis in silkworm Bombyx mori. Methionine aminopeptidase 2 (MetAP2), an essential gene of N. bombycis, is a target for the anti-microsporidian drug Fumagillin, an antibiotic derived from Aspergillus fumigatus. In this study, a 1077bp full-length cDNA of the MetAP2 gene of N. bombycis was cloned and characterized. Furthermore, the expression study of the MetAP2 gene revealed a ubiquitous expression during all the developmental stages of the silkworm B. mori. The phylogenetic analysis of the MetAP2 gene of N. bombycis revealed the MetAP2 gene sequences to be highly conserved in nature. The present study also includes the validation of the anti-microsporidian drug Fumagillin against the MetAP2 gene of N. bombycis. The findings revealed that Fumagilin-B could also suppress the N. bombycis multiplication in the silkworm B. mori, thereby proving the therapeutic role of Fumagillin against microsporidian infection. This is the first-ever report regarding the characterization of the MetAP2 gene in the Indian isolate of N. bombycis and also towards the usage of Fumagillin in the control of microsporidiosis in B. mori.
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