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. 1993 Feb 25;21(4):831–839. doi: 10.1093/nar/21.4.831

Interactions between HIV-1 nucleocapsid protein and viral DNA may have important functions in the viral life cycle.

M Lapadat-Tapolsky 1, H De Rocquigny 1, D Van Gent 1, B Roques 1, R Plasterk 1, J L Darlix 1
PMCID: PMC309214  PMID: 8383840

Abstract

In the virion core of retroviruses, the genomic RNA is tightly associated with nucleocapsid (NC) protein molecules, forming the nucleocapsid structure. NC protein, a highly basic protein with two zinc fingers, is indispensable for RNA dimerization, encapsidation and the initiation of reverse transcription in avian, murine and human retroviruses. Here we show that NC protein of HIV-1 (NCp7) and NCp7 mutants bind to DNA fragments representing proviral DNA sequences, forming stable complexes. NCp7 and NCp7 mutants form high molecular weight complexes with large DNA fragments and show cooperativity in binding to the DNAs. It appears that the conserved basic residues, and not the zinc fingers, are important for complex formation. In addition, NCp7 and several NCp7 mutants protect DNAs from nuclease digestion while the DNA ends appear to be poorly protected. NCp7 has been found to bind to strong stop cDNA, the initial product of reverse transcription, and to promote the annealing of this cDNA to HIV-1 RNA corresponding to the 3' end of the genome. In addition, NCp7 slightly stimulates an in vitro IN cleavage assay. These results indicate that the interactions between NCp7 and proviral DNA may be important during provirus synthesis and/or prior to integration.

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Selected References

These references are in PubMed. This may not be the complete list of references from this article.

  1. Alizon M., Wain-Hobson S., Montagnier L., Sonigo P. Genetic variability of the AIDS virus: nucleotide sequence analysis of two isolates from African patients. Cell. 1986 Jul 4;46(1):63–74. doi: 10.1016/0092-8674(86)90860-3. [DOI] [PubMed] [Google Scholar]
  2. Barré-Sinoussi F., Chermann J. C., Rey F., Nugeyre M. T., Chamaret S., Gruest J., Dauguet C., Axler-Blin C., Vézinet-Brun F., Rouzioux C. Isolation of a T-lymphotropic retrovirus from a patient at risk for acquired immune deficiency syndrome (AIDS). Science. 1983 May 20;220(4599):868–871. doi: 10.1126/science.6189183. [DOI] [PubMed] [Google Scholar]
  3. Boone L. R., Skalka A. M. Viral DNA synthesized in vitro by avian retrovirus particles permeabilized with melittin. I. Kinetics of synthesis and size of minus- and plus-strand transcripts. J Virol. 1981 Jan;37(1):109–116. doi: 10.1128/jvi.37.1.109-116.1981. [DOI] [PMC free article] [PubMed] [Google Scholar]
  4. Brown P. O. Integration of retroviral DNA. Curr Top Microbiol Immunol. 1990;157:19–48. doi: 10.1007/978-3-642-75218-6_2. [DOI] [PubMed] [Google Scholar]
  5. Chen M., Garon C. F., Papas T. S. Native ribonucleoprotein is an efficient transcriptional complex of avian myeloblastosis virus. Proc Natl Acad Sci U S A. 1980 Mar;77(3):1296–1300. doi: 10.1073/pnas.77.3.1296. [DOI] [PMC free article] [PubMed] [Google Scholar]
  6. Craigie R., Fujiwara T., Bushman F. The IN protein of Moloney murine leukemia virus processes the viral DNA ends and accomplishes their integration in vitro. Cell. 1990 Aug 24;62(4):829–837. doi: 10.1016/0092-8674(90)90126-y. [DOI] [PubMed] [Google Scholar]
  7. Davis J., Scherer M., Tsai W. P., Long C. Low-molecular- weight Rauscher leukemia virus protein with preferential binding for single-stranded RNA and DNA. J Virol. 1976 May;18(2):709–718. doi: 10.1128/jvi.18.2.709-718.1976. [DOI] [PMC free article] [PubMed] [Google Scholar]
  8. Gorelick R. J., Henderson L. E., Hanser J. P., Rein A. Point mutants of Moloney murine leukemia virus that fail to package viral RNA: evidence for specific RNA recognition by a "zinc finger-like" protein sequence. Proc Natl Acad Sci U S A. 1988 Nov;85(22):8420–8424. doi: 10.1073/pnas.85.22.8420. [DOI] [PMC free article] [PubMed] [Google Scholar]
  9. Havron A., Sperling J. Specificity of photochemical cross-linking in protein-nucleic acid complexes: identification of the interacting residues in RNase- pyrimidine nucleotide complex. Biochemistry. 1977 Dec 13;16(25):5631–5635. doi: 10.1021/bi00644a038. [DOI] [PubMed] [Google Scholar]
  10. Hu W. S., Temin H. M. Genetic consequences of packaging two RNA genomes in one retroviral particle: pseudodiploidy and high rate of genetic recombination. Proc Natl Acad Sci U S A. 1990 Feb;87(4):1556–1560. doi: 10.1073/pnas.87.4.1556. [DOI] [PMC free article] [PubMed] [Google Scholar]
  11. LaFemina R. L., Callahan P. L., Cordingley M. G. Substrate specificity of recombinant human immunodeficiency virus integrase protein. J Virol. 1991 Oct;65(10):5624–5630. doi: 10.1128/jvi.65.10.5624-5630.1991. [DOI] [PMC free article] [PubMed] [Google Scholar]
  12. Leis J., Jentoft J. Characteristics and regulation of interaction of avian retrovirus pp12 protein with viral RNA. J Virol. 1983 Nov;48(2):361–369. doi: 10.1128/jvi.48.2.361-369.1983. [DOI] [PMC free article] [PubMed] [Google Scholar]
  13. Schulein M., Burnette W. N., August J. T. Stoichiometry and specificity of binding of Rauscher oncovirus 10,000-dalton (p10) structural protein to nucleic acids. J Virol. 1978 Apr;26(1):54–60. doi: 10.1128/jvi.26.1.54-60.1978. [DOI] [PMC free article] [PubMed] [Google Scholar]
  14. Secnik J., Gelfand C. A., Jentoft J. E. Retroviral nucleocapsid protein specifically recognizes the base and the ribose of mononucleotides and mononucleotide components. Biochemistry. 1992 Mar 24;31(11):2982–2988. doi: 10.1021/bi00126a020. [DOI] [PubMed] [Google Scholar]
  15. Sherman P. A., Dickson M. L., Fyfe J. A. Human immunodeficiency virus type 1 integration protein: DNA sequence requirements for cleaving and joining reactions. J Virol. 1992 Jun;66(6):3593–3601. doi: 10.1128/jvi.66.6.3593-3601.1992. [DOI] [PMC free article] [PubMed] [Google Scholar]
  16. Sherman P. A., Fyfe J. A. Human immunodeficiency virus integration protein expressed in Escherichia coli possesses selective DNA cleaving activity. Proc Natl Acad Sci U S A. 1990 Jul;87(13):5119–5123. doi: 10.1073/pnas.87.13.5119. [DOI] [PMC free article] [PubMed] [Google Scholar]
  17. de Rocquigny H., Ficheux D., Gabus C., Fournié-Zaluski M. C., Darlix J. L., Roques B. P. First large scale chemical synthesis of the 72 amino acid HIV-1 nucleocapsid protein NCp7 in an active form. Biochem Biophys Res Commun. 1991 Oct 31;180(2):1010–1018. doi: 10.1016/s0006-291x(05)81166-0. [DOI] [PubMed] [Google Scholar]
  18. van Gent D. C., Elgersma Y., Bolk M. W., Vink C., Plasterk R. H. DNA binding properties of the integrase proteins of human immunodeficiency viruses types 1 and 2. Nucleic Acids Res. 1991 Jul 25;19(14):3821–3827. doi: 10.1093/nar/19.14.3821. [DOI] [PMC free article] [PubMed] [Google Scholar]

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