摘要
The global burden caused by dengue has increased dramatically in recent decades. Dengue Fever and its severe clinical manifestation, Dengue Hemorrhagic Fever and Dengue Shock Syndrome, have become international public health problem endemic in more than 100 countries, risking 2.5 to 3 billion world populations in tropical and subtropical region. Envelope （E） protein of dengue virus has been proposed as the most important antigen that enables it as vaccine candidate or diagnostic materials. Recombinant protein E production is desirable for dengue vaccine and diagnostic development, especially in Indonesia, where dengue is epidemic. Cloning E gene in an expression vector is essential as an initial method to produce dengue E antigens. The purpose of this research was to clone E gene of dengue virus type 3 （Indonesia D3-1703 strain） into Saccharomyces cerevisiae expression vector pYES2/CT. The cloning method used was the in vitro ligation protocol. First, the cDNA from dengue virus type 3 strain （D3-1703） was generated. Then the polymerase chain reaction （PCR） amplification product of E gene cassette from this cDNA was obtained. The E gene cassette was ligated into linearized pYES2/CT resulting a recombinant vector named pYES2/CT-E. The cloned E gene was verified by restriction enzyme digestion and PCR. Sequencing analysis at its 5＇ end showed that the E gene was inserted at the right open reading frame. In conclusion, the results showed that for the first time the E gene originated from an Indonesian dengue virus type 3 strain was successfully cloned within the yeast expression vector pYES2/CT. In the future, this clone could be expressed and provided as materials for dengue vaccine and diagnostic kit, specific for Indonesian dengue virus strain.
