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Basic Characteristics of Mutations
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Mutation Site
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P471R |
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Mutation Site Sentence
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DNA sequence analysis of the HPV-18 L1 region revealed six variations: a G to A transition at nt5503, leading to a R25Q AA substitution (n = 23, 41.1%) (Fig. 1I); a C to G transversion at nt5701 with an AA change of P91R (n = 23, 41.1%) (Fig. 1J); a C to G transversion at nt6460 with an AA change of P344R (n = 24, 42.9%) (Fig. 1K); a C to G transversion at nt6625 with an AA change of P399R (n = 25, 44.6%) (Fig. 1L); a C to G transversion at nt6842 with an AA change of P471R (n = 23, 41.1%) (Fig. 1M); and G to A transition at nt6906 with an AA change of D493N (n = 12, 21.4%) (Fig. 1N). |
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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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L1 |
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Standardized Encoding Gene
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L1
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Genotype/Subtype
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HPV18 |
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Viral Reference
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NC_001357
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Functional Impact and Mechanisms
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Disease
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Uterine Cervical Neoplasms
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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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China |
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Literature Information
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PMID
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23451059
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Title
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Sequence variation analysis of HPV-18 isolates in southwest China
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Author
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Shen M,Ding X,Li T,Chen G,Zhou X
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Journal
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PloS one
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Journal Info
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2013;8(2):e56614
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Abstract
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Intratypic variations of HPV-18 are known to differ in the persistence of the infection, frequency of carcinogenesis and the progression of precursor lesions to advanced cervical cancer. This study was designed to analyze sequence variations of HPV-18 isolates in order to discover novel HPV-18 variants and to evaluate the variations among infected women in southwest China. Cervical biopsies from 56 HPV-18-positive women with cervical neoplasia were assayed by PCR amplification and sequencing of all eight genes (E1, E2, E4, E5, E6, E7, L1, L2) of the HPV-18 genome. The most frequently observed variation was a C to G transversion at nucleotide 287 of E6, which was found in 48.2% of samples. Analysis of E7 revealed only one specimen as having sequence variations. In addition, we have identified several novel variations: A551C in E6, G6906A in L1, and C4915T and C5147A in L2. The mutations in E6 and L2 are silent, while the E7 mutation results in a single amino acid change. This study complements and expands on previous descriptions of HPV-18 variants. The sequence variation data presented here provides a foundation for future research on HPV-induced oncogenesis and may prove valuable for developing diagnostic probes and in the design of HPV vaccines for targeted populations.
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Sequence Data
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-
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