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Eukaryotic Cell, June 2005, p. 1057-1065, Vol. 4, No. 6
1535-9778/05/$08.00+0     doi:10.1128/EC.4.6.1057-1065.2005
Copyright © 2005, American Society for Microbiology. All Rights Reserved.

Role of Integrase in Reverse Transcription of the Saccharomyces cerevisiae Retrotransposon Ty1

M. Wilhelm* and F.-X. Wilhelm*

Institut de Biologie Moléculaire et Cellulaire, 15 rue René Descartes, 67084 Strasbourg, France

Received 23 November 2004/ Accepted 17 March 2005

Reverse transcriptase (RT) with its associated RNase H (RH) domain and integrase (IN) are key enzymes encoded by retroviruses and retrotransposons. Several studies have implied a functional role of the interaction between IN and RT during the replication of retroviral and retrotransposon genomes. In this study, IN deletion mutants were used to investigate the role of IN on the RT activity of the yeast Saccharomyces cerevisiae retrotransposon Ty1. We have identified two domains of Ty1 integrase which have effects on RT activity in vivo. The deletion of a domain spanning amino acid residues 233 to 520 of IN increases the exogenous specific activity of RT up to 20-fold, whereas the removal of a region rich in acidic amino acid residues between residues 521 and 607 decreases its activity. The last result complements our observation that an active recombinant RT protein can be obtained if a small acidic tail mimicking the acidic domain of IN is fused to the RT-RH domain. We suggest that interaction between these acidic amino acid residues of IN and a basic region of RT could be critical for the correct folding of RT and for the formation of an active conformation of the enzyme.

* Corresponding author. Mailing address: Institut de Biologie Moléculaire et Cellulaire, 15 rue René Descartes, 67084 Strasbourg, France. Phone: 33 3 88 41 70 06. Fax: 33 3 88 60 22 18. E-mail: wilhelm{at}ibmc.u-strasbg.fr.

Eukaryotic Cell, June 2005, p. 1057-1065, Vol. 4, No. 6
1535-9778/05/$08.00+0     doi:10.1128/EC.4.6.1057-1065.2005
Copyright © 2005, American Society for Microbiology. All Rights Reserved.



This article has been cited by other articles:

  • Moore, S. P., Garfinkel, D. J. (2009). Functional Analysis of N-Terminal Residues of Ty1 Integrase. J. Virol. 83: 9502-9511 [Abstract] [Full Text]  
  • Matsuda, E., Garfinkel, D. J. (2009). Posttranslational interference of Ty1 retrotransposition by antisense RNAs. Proc. Natl. Acad. Sci. USA 106: 15657-15662 [Abstract] [Full Text]  
  • Yarrington, R. M., Chen, J., Bolton, E. C., Boeke, J. D. (2007). Mn2+ Suppressor Mutations and Biochemical Communication between Ty1 Reverse Transcriptase and RNase H Domains. J. Virol. 81: 9004-9012 [Abstract] [Full Text]  
  • Puglia, J., Wang, T., Smith-Snyder, C., Cote, M., Scher, M., Pelletier, J. N., John, S., Jonsson, C. B., Roth, M. J. (2006). Revealing Domain Structure through Linker-Scanning Analysis of the Murine Leukemia Virus (MuLV) RNase H and MuLV and Human Immunodeficiency Virus Type 1 Integrase Proteins. J. Virol. 80: 9497-9510 [Abstract] [Full Text]  
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