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Journal of Virology, November 2006, p. 11313-11321, Vol. 80, No. 22
0022-538X/06/$08.00+0     doi:10.1128/JVI.01737-06
Copyright © 2006, American Society for Microbiology. All Rights Reserved.

A High-Throughput Method for Cloning and Sequencing Human Immunodeficiency Virus Type 1 Integration Sites{triangledown}

Sanggu Kim,1 Yein Kim,2 Teresa Liang,2 Janet S. Sinsheimer,3 and Samson A. Chow1,2*

Biomedical Engineering Interdepartmental Degree Program,1 Departments of Human Genetics and Biomathematics,3 Department of Molecular and Medical Pharmacology, Molecular Biology Institute, and UCLA AIDS Institute, UCLA School of Medicine, Los Angeles, California 900952

Received 10 August 2006/ Accepted 31 August 2006

Integration of retroviral DNA is nonspecific and can occur at many sites throughout chromosomes. However, the process is not uniformly distributed, and both hot and cold spots for integration exist. The mechanism that determines target site specificity is not well understood. Because of the nonspecific and widespread nature of integration, studies analyzing the mechanism and factors that control target site selection require the collection and analysis of a large library of human immunodeficiency virus type 1 (HIV-1) proviral clones. Such analyses are time-consuming and labor-intensive using conventional means. We have developed an efficient and high-throughput method of sequencing and mapping a large number of independent integration sites in the absence of any selection or bias. The new assay involves the use of a modified HIV-1 (NL-Mme) containing a type IIS restriction site, MmeI, at the right end of viral DNA. Digestion of genomic DNA from NL-Mme-infected cells generated viral DNA-containing fragments of a discrete size. Subsequent ligation-mediated PCR yielded short integration site fragments termed Int-tags, which were concatemerized for determining multiple integration sites in a single sequencing reaction. Analysis of chromosomal features and sequence preference associated with integration events confirmed the validity of the new high-throughput assay. The assay will aid the effort in understanding the mechanisms of target site selection during HIV-1 DNA integration, and the described methodology can be adapted easily to integration site studies involving other retroviruses and transposons.

* Corresponding author. Mailing address: Department of Molecular and Medical Pharmacology, Molecular Biology Institute, and UCLA AIDS Institute, UCLA School of Medicine, Los Angeles, CA 90095. Phone: (310) 825-9600. Fax: (310) 825-6267. E-mail: schow{at}mednet.ucla.edu.

{triangledown} Published ahead of print on 13 September 2006.

Journal of Virology, November 2006, p. 11313-11321, Vol. 80, No. 22
0022-538X/06/$08.00+0     doi:10.1128/JVI.01737-06
Copyright © 2006, American Society for Microbiology. All Rights Reserved.



This article has been cited by other articles:

  • Vatakis, D. N., Kim, S., Kim, N., Chow, S. A., Zack, J. A. (2009). Human Immunodeficiency Virus Integration Efficiency and Site Selection in Quiescent CD4+ T Cells. J. Virol. 83: 6222-6233 [Abstract] [Full Text]  
  • Kim, S., Kim, N., Dong, B., Boren, D., Lee, S. A., Das Gupta, J., Gaughan, C., Klein, E. A., Lee, C., Silverman, R. H., Chow, S. A. (2008). Integration Site Preference of Xenotropic Murine Leukemia Virus-Related Virus, a New Human Retrovirus Associated with Prostate Cancer. J. Virol. 82: 9964-9977 [Abstract] [Full Text]  
  • Dong, B., Kim, S., Hong, S., Das Gupta, J., Malathi, K., Klein, E. A., Ganem, D., DeRisi, J. L., Chow, S. A., Silverman, R. H. (2007). From the Cover: An infectious retrovirus susceptible to an IFN antiviral pathway from human prostate tumors. Proc. Natl. Acad. Sci. USA 104: 1655-1660 [Abstract] [Full Text]  


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