Expression of the thermostable Moloney murine leukemia virus reverse transcriptase by silkworm-baculovirus expression system

Takumi Yano, Jae Man Lee, Jian Xu, Yoshiki Morifuji, Akitsu Masuda, Masato Hino, Daisuke Morokuma, Ryosuke Fujita, Masateru Takahashi, Takahiro Kusakabe, Hiroaki Mon

Research output: Contribution to journalArticlepeer-review

3 Citations (Scopus)

Abstract

Reverse transcriptase from Moloney murine leukemia virus (MMLVRT) is an RNA dependent DNA polymerase, which has been used as a fundamental tool for molecular biology and biotechnology. The secondary structures formed in the RNA templates decrease the accessibility of the reverse transcriptase to the RNA templates; it is important to unfold the RNA secondary structure by increasing the reaction temperature to perform the successful transcription. In this study, we applied silkworm baculovirus expression vector system (silkworm-BEVS) to mass-produce and purify the recombinant MMLVRTs with the N- or C- terminal tandem tags. We confirmed that both of the recombinant MMLVRT enzymes have intact DNA polymerase activity. It is notable that C- terminal tagged MMLVRT outperformed MMLVRT obtained from the E. coli expression system in terms of thermostability and sensitivity to low quantities of RNA template. Taken together, these results demonstrate that silkworm-BEVS is a promising alternative strategy to produce the functional and thermostable reverse transcriptase.

Original languageEnglish
Pages (from-to)453-457
Number of pages5
JournalJournal of Asia-Pacific Entomology
Volume22
Issue number2
DOIs
Publication statusPublished - Jun 2019

All Science Journal Classification (ASJC) codes

  • Insect Science

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