Nucleic Acid-binding Properties of Adenovirus Structural Polypeptides

Russell, W. C.; Precious, B.

doi:10.1099/0022-1317-63-1-69

Cited by 57 publications

(36 citation statements)

References 40 publications

(29 reference statements)

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“…In the third place, the immature adenovirus core is a tightly compacted sphere that remains bound to capsid fragments even in high stress conditions. Notably, precursor protein pVI, located at the inner surface the icosahedral shell, binds both hexon and DNA (56,57). All these observations indicate that the interactions established by precursor proteins, whether in the capsid or between capsid and core (e.g.…”

Section: Discussionmentioning

confidence: 86%

The Role of Capsid Maturation on Adenovirus Priming for Sequential Uncoating

Pérez-Berná

Ortega-Esteban

Menéndez-Conejero

et al. 2012

Journal of Biological Chemistry

132

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Section: Discussionmentioning

confidence: 86%

The Role of Capsid Maturation on Adenovirus Priming for Sequential Uncoating

Pérez-Berná

Ortega-Esteban

Menéndez-Conejero

et al. 2012

Journal of Biological Chemistry

132

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mentioning

confidence: 95%

“…Protein VII associates more efficiently with double-stranded DNA than single-stranded (Sato & Hosokawa, 1984). Binding of both proteins VII and Mu to DNA is not DNA sequence-specific (Russell & Precious, 1982).During adenovirus infection, following capsid dissociation, protein VII remains complexed to adenovirus DNA, and this complex enters the nucleus via the nuclear pore (Greber et al, 1997). Protein VII inhibits adenovirus DNA synthesis (Korn & Horwitz, 1986) and transcription in vitro (Nakanishi et al, 1986) and thus is then likely to dissociate from DNA to allow these processes to occur.…”

mentioning

confidence: 99%

Adenovirus core protein VII contains distinct sequences that mediate targeting to the nucleus and nucleolus, and colocalization with human chromosomes

Lee

Blair

Matthews

2003

Journal of General Virology

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During adenovirus infection, following capsid dissociation, core protein VII enters the host cell nucleus complexed with adenovirus DNA. In order to determine whether protein VII may have an active role in this nuclear import, regions of the preVII gene were amplified by PCR, and further oligonucleotide mutants were designed with site-directed mutation of codons for the basic amino acids arginine and lysine. Fragments were cloned into a mammalian expression plasmid to express the peptides as N-terminal fusions to enhanced green fluorescent protein. Results demonstrate that preVII protein contains both nuclear and nucleolar targeting sequences. Such signals may be important in the delivery of adenovirus DNA to the host cell nucleus during adenovirus infection. Furthermore, the data suggest that protein VII may bind to human chromosomes by means of two distinct domains, one sharing homology with the N-terminal regulatory tail of histone H3.Enclosed by approximately 12 capsid proteins the human adenovirus genome, comprising approximately 36 kb of linear double-stranded DNA, is non-covalently bound to the viral core proteins Mu, V, and VII (Vayda et al., 1983). Proteins VII and Mu are tightly associated with the viral DNA (Vayda et al., 1983;Chatterjee et al., 1985), whilst protein V may form a link between the viral DNA-core protein complex and the viral capsid (Matthews & Russell, 1998).In human adenoviruses, both protein VII and Mu are encoded by the late transcription unit L2 (Alestrom et al., 1984). Mature protein VII of human adenovirus 2 and 5 contains 174 amino acids and is formed from its precursor by adenovirus-encoded protease-mediated cleavage of a 24 amino acid N-terminal segment (Sung et al., 1983;Alestrom et al., 1984;Webster et al., 1989). The mature protein has four highly basic domains containing arginineand lysine-rich sequences, separated by predicted alphahelices. The interaction of protein VII with DNA appears to be charge-based between these basic regions and the phosphate backbone of 90-150 DNA bp (Vayda & Flint, 1987), resulting in the DNA being considerably condensed as a result of superfolding (Black & Center, 1979;Sato & Hosokawa, 1984). Protein VII associates more efficiently with double-stranded DNA than single-stranded (Sato & Hosokawa, 1984). Binding of both proteins VII and Mu to DNA is not DNA sequence-specific (Russell & Precious, 1982).During adenovirus infection, following capsid dissociation, protein VII remains complexed to adenovirus DNA, and this complex enters the nucleus via the nuclear pore (Greber et al., 1997). Protein VII inhibits adenovirus DNA synthesis (Korn & Horwitz, 1986) and transcription in vitro (Nakanishi et al., 1986) and thus is then likely to dissociate from DNA to allow these processes to occur. Antibodies raised against protein Mu for use in Western blots and ELISA cross-react with protein VII, presumably due to the homologous unusual arginine-rich sequences present in both proteins (Lunt et al., 1988). Protein VII has homologues in every adenovirus studi...

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“…2 d). Fractions from a glycerol gradient of DOC-disrupted and heat-disrupted purified virus were analysed by S D S -P A G E followed by electrophoretic transfer of the separated proteins to nitrocellulose and hybridization of nicktranslated D N A to the transferred proteins and autoradiography (Russell & Precious, 1982). This demonstrated that in addition to the proteins V, VII (and pVII), polypeptide IVa2 was also specifically associated with the core fractions (Fig.…”

Section: Discussionmentioning

confidence: 99%