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• Fogarty, K
• Zhang, W
• Grigsby, I
• Johnson, J
• Chen, Y
• Mueller, J
• Mansky, L
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• Fogarty, K
• Zhang, W
• Grigsby, I
• Johnson, J
• Chen, Y
• Mueller, J
• Mansky, L
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• Fogarty, K
• Zhang, W
• Grigsby, I
• Johnson, J
• Chen, Y
• Mueller, J
• Mansky, L

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Viruses 2011, 3(6), 770-793; doi:10.3390/v3060770

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New Insights into HTLV-1 Particle Structure, Assembly, and Gag-Gag Interactions in Living Cells

Keir H. Fogarty ^1,4 , Wei Zhang ^1,2 , Iwen F. Grigsby ^1,2 , Jolene L. Johnson ⁴ , Yan Chen ^1,4 , Joachim D. Mueller ^1,4,5  and Louis M. Mansky ^1,2,3,*

¹ Institute for Molecular Virology, University of Minnesota, Minneapolis, 18-242 Moos Tower, 515 Delaware St. SE, Minneapolis, MN 55455, USA ² Department of Diagnostic and Biological Sciences, School of Dentistry, University of Minnesota, Minneapolis, MN 55455, USA ³ Department of Microbiology, Medical School, University of Minnesota, Minneapolis, MN 5455, USA ⁴ School of Physics and Astronomy, University of Minnesota, Minneapolis, MN 55455, USA ⁵ Department of Biomedical Engineering, University of Minnesota, Minneapolis, MN 55455, USA

* Author to whom correspondence should be addressed.

Received: 15 April 2011; in revised form: 20 May 2011 / Accepted: 20 May 2011 / Published: 14 June 2011

(This article belongs to the Special Issue Recent Developments in HTLV Research)

Download PDF Full-Text [578 KB, uploaded 14 June 2011 16:52 CEST]

Abstract: Human T-cell leukemia virus type 1 (HTLV-1) has a reputation for being extremely difficult to study in cell culture. The challenges in propagating HTLV-1 has prevented a rigorous analysis of how these viruses replicate in cells, including the detailed steps involved in virus assembly. The details for how retrovirus particle assembly occurs are poorly understood, even for other more tractable retroviral systems. Recent studies on HTLV-1 using state-of-the-art cryo-electron microscopy and fluorescence-based biophysical approaches explored questions related to HTLV-1 particle size, Gag stoichiometry in virions, and Gag-Gag interactions in living cells. These results provided new and exciting insights into fundamental aspects of HTLV-1 particle assembly—which are distinct from those of other retroviruses, including HIV-1. The application of these and other novel biophysical approaches promise to provide exciting new insights into HTLV-1 replication.

Keywords: deltaretrovirus; lentivirus; spectroscopy; fluorescence; tomography

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