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The DNAs of four human papillomaviruses (HPVs) that were found in the benign lesions of three patients suffering from epidermodysplasia verruciformis have been characterized. The flat wart-like lesions and the macular lesions of patient 1 contained two viruses, HPV-3a and HPV-8, respectively, whose genomes had previously been only partially characterized. The flat wart-like lesions of patient 2 and the macular lesions of patient 3 each contained a virus previously considered as belonging to types 3 and 5, respectively. These viruses are shown in the present study to be different from all of the HPV types so far characterized; they have tentatively been named HPV-10 and HPV-12. The HPV-3a, HPV-8, and HPV-12 DNAs and the two SalI fragments of HPV-10 DNA (94.1 and 5.9% of the genome length) were cloned in Escherichia coli after having been inserted in plasmid pBR322. The cloned HPV genomes have similar sizes (about 7,700 base pairs), but their guanine-plus-cytosine contents differ from 41.8% for HPV-12 DNA to 45.5% for HPV-3a DNA. The study of the sensitivity of the four HPV DNAs to 14 restriction endonucleases permitted the construction of cleavage maps. Evidence for conserved restriction sites was found only for the HPV-3a and HPV-10 genomes since 5 of the 21 restriction sites localized in the HPV-3a DNA seem to be present also in the HPV-10 DNA. Hybridization experiments, performed in liquid phase at saturation, showed a 35% sequence homology between HPV-3a and HPV-10 DNAs, 17 to 29% sequence homology among HPV-5, HPV-8, and HPV-12 DNAs, almost no sequence homology between the HPV-3a or HPV-10 DNA and the other HPV DNAs, and a weak homology between HPV-9 DNA and HPV-8 or HPV-12 DNA. Blot hybridization experiments showed no sequence homology between the HPV-3a, HPV-8, and HPV-12 DNAs and the DNAs of the HPVs associated with skin warts (HPV-1a, HPV-2, HPV-4, and HPV-7) or with mucocutaneous and mucous membrane lesions (HPV-6b and HPV-11a, respectively). One exception was a weak sequence homology between the HPV-2 prototype and HPV-3a or HPV-10 DNA.(ABSTRACT TRUNCATED AT 400 WORDS)

journal of virology

Human papillomaviruses associated with epidermodysplasia verruciformis. II. Molecular cloning and biochemical characterization of human papillomavirus 3a, 8, 10, and 12 genomes