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Entire genome sequences of two new HCV subtypes, 6r and 6s, and characterization of unique HVR1 variation patterns within genotype 6.
J Viral Hepat. 2009 Jun; 16(6):406-17.JV

Abstract

Hepatitis C virus genotype 6 currently contains 21 recognized subtypes, 6a-6u, for which 6r and 6s lack complete genome sequences. In this study, we entirely sequenced variants QC245 and QC66 from Cambodian immigrants in Canada representing subtypes 6r and 6s, respectively. The two genomes shared 75.3% nucleotide similarities to each other and 72.0-82.9% to 21 reference sequences representing subtypes 6a-6q, 6t-6u and variants km41 and gz52557. QC66 and QC245 displayed genome lengths of 9473 and 9450 nt and each contained a single open reading frame of 9051 nt. In 10 protein encoding regions QC245 and QC66 shared common sizes with TV249/6t and 537796/6l isolates, respectively. Phylogenetic analyses demonstrated that QC245 was more closely related to subtype 6f, but both QC66 and QC245 were subtypically different from all other genotype 6 subtypes. Our full-length sequence data confirmed the status of subtype 6r and 6s within genotype 6. Analysis of partial sequences revealed seven 6t and two 6s isolates that were all isolated from Cambodian immigrants. Analysis of the hypervariable region 1 sequences of 81 genotype 6 variants revealed two unique patterns of variation. First, most variants showed an amino acid deletion at the 4th position and second, many contained a basic residue at the 7th position. Possible roles of these two variation patterns are further discussed.

Authors+Show Affiliations

Division of Gastroenterology-Hepatology, and Nutrition, Department of Medicine, University of Utah, Salt Lake City, UT 84132, USA.No affiliation info availableNo affiliation info availableNo affiliation info available

Pub Type(s)

Journal Article

Language

eng

PubMed ID

19281488

Citation

Li, C, et al. "Entire Genome Sequences of Two New HCV Subtypes, 6r and 6s, and Characterization of Unique HVR1 Variation Patterns Within Genotype 6." Journal of Viral Hepatitis, vol. 16, no. 6, 2009, pp. 406-17.
Li C, Lu L, Zhang X, et al. Entire genome sequences of two new HCV subtypes, 6r and 6s, and characterization of unique HVR1 variation patterns within genotype 6. J Viral Hepat. 2009;16(6):406-17.
Li, C., Lu, L., Zhang, X., & Murphy, D. (2009). Entire genome sequences of two new HCV subtypes, 6r and 6s, and characterization of unique HVR1 variation patterns within genotype 6. Journal of Viral Hepatitis, 16(6), 406-17. https://doi.org/10.1111/j.1365-2893.2009.01086.x
Li C, et al. Entire Genome Sequences of Two New HCV Subtypes, 6r and 6s, and Characterization of Unique HVR1 Variation Patterns Within Genotype 6. J Viral Hepat. 2009;16(6):406-17. PubMed PMID: 19281488.
* Article titles in AMA citation format should be in sentence-case
TY - JOUR T1 - Entire genome sequences of two new HCV subtypes, 6r and 6s, and characterization of unique HVR1 variation patterns within genotype 6. AU - Li,C, AU - Lu,L, AU - Zhang,X, AU - Murphy,D, Y1 - 2009/03/05/ PY - 2009/3/14/entrez PY - 2009/3/14/pubmed PY - 2009/7/3/medline SP - 406 EP - 17 JF - Journal of viral hepatitis JO - J Viral Hepat VL - 16 IS - 6 N2 - Hepatitis C virus genotype 6 currently contains 21 recognized subtypes, 6a-6u, for which 6r and 6s lack complete genome sequences. In this study, we entirely sequenced variants QC245 and QC66 from Cambodian immigrants in Canada representing subtypes 6r and 6s, respectively. The two genomes shared 75.3% nucleotide similarities to each other and 72.0-82.9% to 21 reference sequences representing subtypes 6a-6q, 6t-6u and variants km41 and gz52557. QC66 and QC245 displayed genome lengths of 9473 and 9450 nt and each contained a single open reading frame of 9051 nt. In 10 protein encoding regions QC245 and QC66 shared common sizes with TV249/6t and 537796/6l isolates, respectively. Phylogenetic analyses demonstrated that QC245 was more closely related to subtype 6f, but both QC66 and QC245 were subtypically different from all other genotype 6 subtypes. Our full-length sequence data confirmed the status of subtype 6r and 6s within genotype 6. Analysis of partial sequences revealed seven 6t and two 6s isolates that were all isolated from Cambodian immigrants. Analysis of the hypervariable region 1 sequences of 81 genotype 6 variants revealed two unique patterns of variation. First, most variants showed an amino acid deletion at the 4th position and second, many contained a basic residue at the 7th position. Possible roles of these two variation patterns are further discussed. SN - 1365-2893 UR - https://www.unboundmedicine.com/medline/citation/19281488/Entire_genome_sequences_of_two_new_HCV_subtypes_6r_and_6s_and_characterization_of_unique_HVR1_variation_patterns_within_genotype_6_ L2 - https://doi.org/10.1111/j.1365-2893.2009.01086.x DB - PRIME DP - Unbound Medicine ER -