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Nucleic Acids Research, 2000, Vol. 28, No. 3 663-668
© 2000 Oxford University Press

SURVEY AND SUMMARY A compilation of cellular transcription factor interactions with the HIV-1 LTR promoter

Lloyd A. Pereira, Karen Bentley, Anna Peeters, Melissa J Churchill and Nicholas J. Deacon*

AIDS Molecular Biology Unit, National Centre for HIV Virology Research, The Macfarlane Burnet Centre for Medical Research, PO Box 254, Fairfield, Victoria 3078, Australia

Received October 5, 1999; Accepted November 4, 1999.


    ABSTRACT
 TOP
 ABSTRACT
 INTRODUCTION
 DESCRIPTION OF THE COMPILATION
 REFERENCES
 
The human immunodeficiency virus type 1 (HIV-1) long terminal repeat (LTR) represents a model promoter system and the identification and characterisation of cellular proteins that interact with this region has provided a basic understanding about both general eukaryotic and HIV-1 proviral transcriptional regulation. To date a large number of sequence-specific DNA–protein interactions have been described for the HIV-1 LTR. The aim of this report is to provide a comprehensive, updated listing of these HIV-1 LTR interactions. It is intended as a reference point to facilitate on-going studies characterising the identity of cellular proteins interacting with the HIV-1 LTR and the functional role(s) of specific regions of the LTR for HIV-1 replication.


    INTRODUCTION
 TOP
 ABSTRACT
 INTRODUCTION
 DESCRIPTION OF THE COMPILATION
 REFERENCES
 
The regulation of human immunodeficiency virus type 1 (HIV-1) proviral gene expression is tightly regulated by the binding of cellular host proteins to a variety of cis-acting DNA sequences located within the long terminal repeat (LTR) region of the viral genome (1). The HIV-1 LTR is divided into three regions: U3, R and U5 (Fig. 1). These contain four functional regions related to the regulation of HIV-1 transcription: the trans­activation response (TAR) element found within R (nt +1 to +60), the basal or core promoter (nt –78 to –1), a core enhancer (nt –105 to –79) and a modulatory region (nt –454 to –104) (1). The last three are found within U3. The modulatory region has also been proposed to contain a negative regulatory element (NRE) between nt –340 and –184 because deletions within this region increased HIV-1 LTR-directed transcription and viral replication (2,3).



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Figure 1. Structure of the HIV-1 5'-LTR and gag leader sequence (GLS). The U3 region contains basal, enhancer and modulatory promoter elements, including the negative regulatory element (NRE). The sequence of the transactivating region (TAR) is found in the repeat (R) region. The tRNA primer binding (tRNA) and major splice donor (SD) sites are within the GLS. The initiation codon of the gag gene is depicted by AUG. Numbering above the boxed regions starts from the first nucleotide of the proviral DNA sequence (here using the HIV-1HXB2 sequence; accession no. K03455), numbering below the boxed regions is relative to the transcription start site nucleotide +1.

 
Early reports showed the three Sp1 core promoter binding sites and two NF-{kappa}B core enhancer motifs to be key elements involved in the regulation of HIV-1 transcription (1). Several cellular proteins including c-Myb, NF-AT, USF and COUP have also been proposed to interact with the modulatory region and contribute to HIV-1 LTR promoter activity (1,47). Subsequent studies have revealed a wealth of additional U3 and TAR DNA–protein interactions that significantly influence levels of HIV-1 LTR transcription. More recently, important motifs within the U5 region and gag leader sequence (GLS) have been described (811). Furthermore, we have identified a fourth Sp1 binding site at the 5'-end of the U3 region and, in addition to the U3 USF and NF-{kappa}B sites, found it to be essential for negative sense transcription from the HIV-1 LTR (12,13). Together these various binding sites and their relative orientations mediate combinatorial DNA–protein and protein–protein interactions that form a complex regulatory network through which HIV-1 regulates its levels of positive and negative sense gene expression in a diverse range of target host cells under a variety of extracellular stimuli.


    DESCRIPTION OF THE COMPILATION
 TOP
 ABSTRACT
 INTRODUCTION
 DESCRIPTION OF THE COMPILATION
 REFERENCES
 
The present report provides an updated listing covering previously published HIV-1 LTR DNA–protein interactions (Tables 15). Interactions are tabulated according to the functional regions of the LTR (R/U5 junction, U5, GLS, TAR, basal/core promoter, core enhancer and modulatory region). The identity and site of interaction are listed in the first and second columns, respectively. Within each table interactions are listed in an order that is relative to the transcription start site +1. While most interactions are highly conserved across strains of HIV-1, not all sites are found in all strains and the exact position of an interacting site may differ slightly. Therefore, sites are recorded according to the numbering of the HIV-1 strain used in the original description. The source cell type and stimulatory conditions under which the interaction was observed are listed in the third column. In some instances interactions have been defined using only proteins in either a recombinant or purified form. For each interaction, the effect on levels of HIV-1 LTR transcription is provided in the fourth column. For more specific details of transcription factor interactions with the HIV-1 LTR and their proposed effect(s) on levels of transcription readers are referred to publications cited in the fifth column.


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Table 1. Cellular transcription factors interacting with the HIV-1 LTR R/U5 junction, U5 region and GLS (nt +78 to +296)
 

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Table 5. Cellular transcription factors interacting with the HIV-1 LTR modulatory region (nt –454 to –104)
 

    ACKNOWLEDGEMENTS
 
We are grateful to members of the AIDS Molecular Biology Unit, in particular Paul F. Lambert and Mandy Ludford-Menting, for helpful discussions and assistance. We thank Prof. John Mills for critical review of the manuscript. L.A.P. was in receipt of a Commonwealth AIDS Research Grant PhD Scholarship. Work in the AIDS Molecular Biology Unit is supported by an Australian Commonwealth AIDS Research Grant as a Laboratory of the National Centre in HIV Virology Research and the Research Fund of the Macfarlane Burnet Centre for Medical Research.


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Table 2. Cellular transcription factors interacting with the HIV-1 LTR TAR DNA region (nt +1 to +60), initiator element (Inr; nt –7 to +30) and the inducer of short transcripts (IST, nt –5 to +82)
 

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Table 3. Cellular transcription factors interacting with the HIV-1 LTR basal/core promoter (nt –78 to –1)
 

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Table 4. Cellular transcription factors interacting with the HIV-1 LTR core enhancer region (nt –105 to –79)
 

    FOOTNOTES
 
* To whom correspondence should be addressed. Tel: +61 3 9282 2234; Fax: +61 3 9482 6152; Email: deacon@burnet.edu.au Present addresses: Lloyd A. Pereira, Laboratory for Physiological Chemistry, Utrecht University, Universiteitsweg 100, 3584G CG Utrecht, The Netherlands Anna Peeters, Department of Epidemiology and Preventive Medicine, Monash Medical School, Alfred Hospital, Prahran, Victoria 3181, Australia Back


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 ABSTRACT
 INTRODUCTION
 DESCRIPTION OF THE COMPILATION
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Nucleic Acids Res., April 22, 2005; 33(7): 2318 - 2331.
[Abstract] [Full Text] [PDF]


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J. Virol.Home page
A. Joshi, H. Garg, M. B. Tompkins, and W. A. Tompkins
Preferential Feline Immunodeficiency Virus (FIV) Infection of CD4+ CD25+ T-Regulatory Cells Correlates both with Surface Expression of CXCR4 and Activation of FIV Long Terminal Repeat Binding Cellular Transcriptional Factors
J. Virol., April 15, 2005; 79(8): 4965 - 4976.
[Abstract] [Full Text] [PDF]


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J. Virol.Home page
J. Chen, T. Malcolm, M. C. Estable, R. G. Roeder, and I. Sadowski
TFII-I Regulates Induction of Chromosomally Integrated Human Immunodeficiency Virus Type 1 Long Terminal Repeat in Cooperation with USF
J. Virol., April 1, 2005; 79(7): 4396 - 4406.
[Abstract] [Full Text] [PDF]


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J. Immunol.Home page
K. Devadas, N. J. Hardegen, L. M. Wahl, I. K. Hewlett, K. A. Clouse, K. M. Yamada, and S. Dhawan
Mechanisms for Macrophage-Mediated HIV-1 Induction
J. Immunol., December 1, 2004; 173(11): 6735 - 6744.
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J. Biol. Chem.Home page
R. Sancho, N. Marquez, M. Gomez-Gonzalo, M. A. Calzado, G. Bettoni, M. T. Coiras, J. Alcami, M. Lopez-Cabrera, G. Appendino, and E. Munoz
Imperatorin Inhibits HIV-1 Replication through an Sp1-dependent Pathway
J. Biol. Chem., September 3, 2004; 279(36): 37349 - 37359.
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J. Virol.Home page
T. van Opijnen, J. Kamoschinski, R. E. Jeeninga, and B. Berkhout
The Human Immunodeficiency Virus Type 1 Promoter Contains a CATA Box Instead of a TATA Box for Optimal Transcription and Replication
J. Virol., July 1, 2004; 78(13): 6883 - 6890.
[Abstract] [Full Text] [PDF]


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D. J. Segal, J. Goncalves, S. Eberhardy, C. H. Swan, B. E. Torbett, X. Li, and C. F. Barbas III
Attenuation of HIV-1 Replication in Primary Human Cells with a Designed Zinc Finger Transcription Factor
J. Biol. Chem., April 9, 2004; 279(15): 14509 - 14519.
[Abstract] [Full Text] [PDF]


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J. Virol.Home page
T. M. Hanley, H. L. B. Kiefer, A. C. Schnitzler, J. E. Marcello, and G. A. Viglianti
Retinoid-Dependent Restriction of Human Immunodeficiency Virus Type 1 Replication in Monocytes/Macrophages
J. Virol., March 15, 2004; 78(6): 2819 - 2830.
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J. Leukoc. Biol.Home page
A. Bafica, C. A. Scanga, O. Equils, and A. Sher
The induction of Toll-like receptor tolerance enhances rather than suppresses HIV-1 gene expression in transgenic mice
J. Leukoc. Biol., March 1, 2004; 75(3): 460 - 466.
[Abstract] [Full Text] [PDF]


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Endocr. Rev.Home page
L. Barzon, M. Boscaro, and G. Palu
Endocrine Aspects of Cancer Gene Therapy
Endocr. Rev., February 1, 2004; 25(1): 1 - 44.
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J. Leukoc. Biol.Home page
O. Rohr, C. Marban, D. Aunis, and E. Schaeffer
Regulation of HIV-1 gene transcription: from lymphocytes to microglial cells
J. Leukoc. Biol., November 1, 2003; 74(5): 736 - 749.
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J. Leukoc. Biol.Home page
M. Alfano, N. Sidenius, F. Blasi, and G. Poli
The role of urokinase-type plasminogen activator (uPA)/uPA receptor in HIV-1 infection
J. Leukoc. Biol., November 1, 2003; 74(5): 750 - 756.
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D. G. Brooks, P. A. Arlen, L. Gao, C. M. R. Kitchen, and J. A. Zack
Identification of T cell-signaling pathways that stimulate latent HIV in primary cells
PNAS, October 28, 2003; 100(22): 12955 - 12960.
[Abstract] [Full Text] [PDF]


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J. Virol.Home page
O. Rohr, D. Lecestre, S. Chasserot-Golaz, C. Marban, D. Avram, D. Aunis, M. Leid, and E. Schaeffer
Recruitment of Tat to Heterochromatin Protein HP1 via Interaction with CTIP2 Inhibits Human Immunodeficiency Virus Type 1 Replication in Microglial Cells
J. Virol., May 1, 2003; 77(9): 5415 - 5427.
[Abstract] [Full Text] [PDF]


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J. Virol.Home page
N. E. Faulkner, B. R. Lane, P. J. Bock, and D. M. Markovitz
Protein Phosphatase 2A Enhances Activation of Human Immunodeficiency Virus Type 1 by Phorbol Myristate Acetate
J. Virol., February 1, 2003; 77(3): 2276 - 2281.
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B. M. Badran, S. M. Wolinsky, A. Burny, and K. E. Willard-Gallo
Identification of Three NFAT Binding Motifs in the 5'-Upstream Region of the Human CD3gamma Gene That Differentially Bind NFATc1, NFATc2, and NF-kappa B p50
J. Biol. Chem., November 27, 2002; 277(49): 47136 - 47148.
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J. Virol.Home page
V. Quivy, E. Adam, Y. Collette, D. Demonte, A. Chariot, C. Vanhulle, B. Berkhout, R. Castellano, Y. de Launoit, A. Burny, et al.
Synergistic Activation of Human Immunodeficiency Virus Type 1 Promoter Activity by NF-{kappa}B and Inhibitors of Deacetylases: Potential Perspectives for the Development of Therapeutic Strategies
J. Virol., October 2, 2002; 76(21): 11091 - 11103.
[Abstract] [Full Text] [PDF]


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J. Virol.Home page
B. Wortman, N. Darbinian, B. E. Sawaya, K. Khalili, and S. Amini
Evidence for Regulation of Long Terminal Repeat Transcription by Wnt Transcription Factor TCF-4 in Human Astrocytic Cells
J. Virol., October 2, 2002; 76(21): 11159 - 11165.
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J. Biol. Chem.Home page
Y. Liu, J. Li, B. O. Kim, B. S. Pace, and J. J. He
HIV-1 Tat Protein-mediated Transactivation of the HIV-1 Long Terminal Repeat Promoter Is Potentiated by a Novel Nuclear Tat-interacting Protein of 110 kDa, Tip110
J. Biol. Chem., June 21, 2002; 277(26): 23854 - 23863.
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