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Analysis of the unoccupied site of an integrated human papillomavirus 16 sequence in a cervical carcinoma.

Abstract：

:We have previously cloned and analyzed the structure of a type 16 human papillomavirus (HPV16) integration in a primary cervical carcinoma tissue, M50 (Choo et al., J. Virol. 62, 1659-1666, 1988). We found that specific nucleotide sequences within the HPV16 genome influenced the genomic organization of the integrated viral genome. Using the viral-cellular junctions of the M50 DNA as probes, we have now cloned the unoccupied site from a human genomic library. Mapping analysis showed that a deletion of about 1.1 kilobase pairs (kb) had occurred at the integration site of M50. Sequencing of the integration junctions of the unoccupied site and comparison with the viral sequence has revealed short regions of sequence homology between the viral and the cellular genomes at both junctions. Our results are consistent with a mechanism of integration of the HPV16 sequences in the M50 carcinoma involving illegitimate recombination events using short patches of homologous sequences between the two heterologous genomes for anchorage and as guides for crossover. Preferred topoisomerase I cleavage sites and alternating purine and pyrimidine bases, which favor the formation of Z-DNA, could also be identified at the integration regions, supporting a proposed role for the topoisomerase I enzyme in the illegitimate recombination in the viral integration process.

journal_name

Virology

journal_title

Virology

authors

Choo KB,Lee HH,Liew LN,Chong KY,Chou HF

doi

10.1016/0042-6822(90)90366-y

subject

Has Abstract

pub_date

1990-10-01 00:00:00

pages

621-5

issue

2

eissn

0042-6822

issn

1096-0341

journal_volume

178

pub_type

杂志文章

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