Torque teno sus virus 1 (TTSuV1) has a non-enveloped, single-stranded, negative-sense circular DNA genome, and it is widely distributed in pigs. Open reading frame 1 (ORF1) of TTSuV1 can be transcribed into mRNA and then translated into protein; however, its promoter has not yet been identified. We used a dual-luciferase reporter system, involving pGL3-Basic and pRL-TK, to identify the promoter of TTSuV1 ORF1. Our results revealed that the sequence between nucleotides 196 and 525 promoted the transcription of the firefly luciferase gene. The core sequence of the promoter was between nucleotides 250 and 400. A comparison of the identified TTSuV1 ORF1 promoter with that from cytomegalovirus (CMV) suggested that the two promoters were similar in strength. Our findings provide new information regarding the molecular biology of TTSuV1 and have revealed a new promoter that can be used in plasmids for numerous applications.
Archives of Virology – Springer Journals
Published: Feb 1, 2016
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