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Basic Characteristics of Mutations
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Mutation Site
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E113D |
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Mutation Site Sentence
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An amino acid mutation of E6, E113D, was found in both European (Prototype) and European (Asian) sublineages, but mostly in Japanese strains (92.3%, n = 14), and not at all in the Philippine strains (P = 0.000015). |
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Mutation Level
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Amino acid level |
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Mutation Type
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Nonsynonymous substitution |
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Gene/Protein/Region
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E6 |
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Standardized Encoding Gene
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E6
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Genotype/Subtype
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HPV16 |
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Viral Reference
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K02718
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Functional Impact and Mechanisms
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Disease
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-
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Immune
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- |
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Target Gene
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-
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Clinical and Epidemiological Correlations
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Clinical Information
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- |
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Treatment
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- |
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Location
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Japan;the Philippines;Vietnam |
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Literature Information
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PMID
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23588734
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Title
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E6 and E7 variants of human papillomavirus-16 and -52 in Japan, the Philippines, and Vietnam
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Author
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Ishizaki A,Matsushita K,Hoang HT,Agdamag DM,Nguyen CH,Tran VT,Sasagawa T,Saikawa K,Lihana R,Pham HV,Bi X,Ta VT,Van Pham T,Ichimura H
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Journal
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Journal of medical virology
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Journal Info
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2013 Jun;85(6):1069-76
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Abstract
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Human papillomavirus (HPV) has several intragenotypic variants with different geographical and ethnic distributions. This study aimed to elucidate the distribution patterns of E6 and E7 (E6/E7) intragenotypic variants of HPV type 16 (HPV-16), which is most common worldwide, and HPV-52, which is common in Asian countries such as Japan, the Philippines, and Vietnam. In previous studies, genomic DNA samples extracted from cervical swabs were collected from female sex workers in these three countries and found to be positive for HPV-16 or HPV-52. Samples were amplified further for their E6/E7 genes using type-specific primers and analyzed genetically. Seventy-nine HPV-16 E6/E7 genes were analyzed successfully and grouped into three lineages: European (Prototype), European (Asian), and African-2. The prevalences of HPV-16 European (Prototype)/European (Asian) lineages were 19.4%/80.6% (n = 31) in Japan, 75.0%/20.8% (n = 24) in the Philippines, and 0%/95.8% (n = 24) in Vietnam. The 109 HPV-52 E6/E7 genes analyzed successfully were grouped into four lineages, A-D; the prevalences of lineages A/B/C/D were, respectively, 5.1%/92.3%/0%/2.6% in Japan (n = 39), 34.4%/62.5%/0%/3.1% in the Philippines (n = 32), and 15.8%/73.7%/7.9%/2.6% in Vietnam (n = 38). The distribution patterns of HPV-16 and HPV-52 lineages in these countries differed significantly (P < 0.000001 and P = 0.0048, respectively). There was no significant relationship between abnormal cervical cytology and either HPV-16 E6/E7 lineages or specific amino acid mutations, such as E6 D25E, E6 L83V, and E7 N29S. Analysis of HPV-16 and HPV-52 E6/E7 genes can be a useful molecular-epidemiological tool to distinguish geographical diffusion routes of these HPV types in Asia.
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Sequence Data
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AB663688-AB664063
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