Journal of Microbiology and Biotechnology

  • 제18권6호
  • /
  • Pages.1044-1049
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  • 2008
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  • 1017-7825(pISSN)
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  • 1738-8872(eISSN)
한국미생물·생명공학회 (The Korean Society for Microbiology and Biotechnology)
권호 표지

Functional Nucleotides of U5 LTR Determining Substrate Specificity of Prototype Foamy Virus Integrase

  • Kang, Seung-Yi (Department of Biotechnology, Chung-Ang University) ;
  • Ahn, Dog-Gn (Department of Biotechnology, Chung-Ang University) ;
  • Lee, Chan (Department of Food Science and Technology, Chung-Ang University) ;
  • Lee, Yong-Sup (Kyung Hee East-West Pharmaceutical Research Institute, College of Pharmacy, Kyung Hee University) ;
  • Shin, Cha-Gyun (Department of Biotechnology, Chung-Ang University)
  • 발행 : 2008.06.30
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초록

In order to study functional nucleotides in prototype foamy virus (PFV) DNA on specific recognition by PFV integrase (IN), we designed chimeric U5 long terminal repeat (LTR) DNA substrates by exchanging comparative sequences between human immunodeficiency virus type-1 (HIV-1) and PFV U5 LTRs, and investigated the 3'-end processing reactivity using HIV-1 and PFV INs, respectively. HIV-1 IN recognized the nucleotides present in the fifth and sixth positions at the 3'-end of the substrates more specifically than any other nucleotides in the viral DNA. However, PFV IN recognized the eighth and ninth nucleotides as distinctively as the fifth and sixth nucleotides in the reactions. In addition, none of the nucleotides present in the twelfth, sixteenth, seventeenth, eighteenth, nineteenth, and twentieth positions were not differentially recognized by HIV-1 and PFV INs, respectively. Therefore, our results suggest that the functional nucleotides that are specifically recognized by its own IN in the PFV U5 LTR are different from those in the HIV-1 U5 LTR in aspects of the positions and nucleotide sequences. Furthermore, it is proposed that the functional nucleotides related to the specific recognition by retroviral INs are present inside ten nucleotides from the 3'-end of the U5 LTR.

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