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Journal of Virology, October 1998, p. 8166-8173, Vol. 72, No. 10
Department of Pathology, Harvard Medical
School, Boston, Massachusetts
Received 3 June 1998/Accepted 10 July 1998
Mutation of the conserved glutamic acid residue at position 39 of
human papillomavirus type 16 (HPV-16) E2 to alanine (E39A) disrupts its
E1 interaction activity and its replication function in transient
replication assays but does not affect E2 transcriptional activation.
This E39A mutation also disrupts replication activity of HPV-16 E2 in
HPV-16 in vitro DNA replication. On this basis, we designed 23- and
15-amino-acid peptides derived from HPV-16 E2 sequences flanking the
E39 residue and tested the ability of these peptides to inhibit
interaction between HPV-16 E1 and E2 in vitro. The inhibitory activity
of these peptides was specific, since analogous peptides in which
alanine was substituted for the E39 residue did not inhibit
interaction. The 15-amino-acid peptide E2N-WP15 was the smallest
peptide tested that effectively inhibited HPV-16 E1-E2 interaction.
This peptide also inhibited in vitro replication of HPV-16 DNA. The
efficacy of E2N-WP15 was not exclusive to HPV-16: this peptide also
inhibited interaction of HPV-11 E1 with the E2 proteins of both HPV-11
and HPV-16 and inhibited in vitro replication with these same
combinations of E1 and E2 proteins. These results provide further
evidence that E1-E2 interaction is required for papillomavirus DNA
replication and constitute the first demonstration that inhibition of
this interaction is sufficient to prevent HPV DNA replication in vitro.
0022-538X/98/$04.00+0
Copyright © 1998, American Society for Microbiology. All rights reserved.
A Fifteen-Amino-Acid Peptide Inhibits Human
Papillomavirus E1-E2 Interaction and Human Papillomavirus DNA
Replication In Vitro
*
Corresponding author. Mailing address: Department of
Pathology, Harvard Medical School, 200 Longwood Ave., Boston, MA 02115. Phone: (617) 432-2892. Fax: (617) 432-0727. E-mail:
jbenson{at}warren.med.harvard.edu.
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