Whole-genome analysis reveals the complex evolutionary dynamics of Kenyan G2P[4] human rotavirus strains

S. Ghosh, N. Adachi, Z. Gatheru, J. Nyangao, D. Yamamoto, M. Ishino, N. Urushibara, N. Kobayashi
2011 Journal of General Virology  
Although G2P[4] rotaviruses are common causes of acute childhood diarrhoea in Africa, to date there are no reports on whole genomic analysis of African G2P[4] strains. In this study, the nearly complete genome sequences of two Kenyan G2P[4] strains, AK26 and D205, detected in 1982 and 1989 , respectively, were analysed. Strain D205 exhibited a DS-1-like genotype constellation, whilst strain AK26 appeared to be an intergenogroup reassortant with a Wa-like NSP2 genotype on the DS-1-like genotype
more » ... onstellation. The VP2-4, VP6-7, NSP1, NSP3 and NSP5 genes of strain AK26 and the VP2, VP4, VP7 and NSP1-5 genes of strain D205 were closely related to those of the prototype or other human G2P[4] strains. In contrast, their remaining genes were distantly related, and, except for NSP2 of AK26, appeared to originate from or share a common origin with rotavirus genes of artiodactyl (ruminant and camelid) origin. These observations highlight the complex evolutionary dynamics of African G2P[4] rotaviruses. 3Present address: Gynae-Paed Medical Centre, Nairobi, Kenya. The GenBank accession numbers for the nucleotide sequences of the VP1-4, VP6-7 and NSP1-5 genes of human RV-A G2P[4] strains D205 and AK26 are JF304915-JF304936, respectively. A supplementary figure comparing the deduced amino acid sequences of the VP7 genes of strains AK26 and D205 with those of other strains and a supplementary table of primers used for amplification of different genes of strains AK26 and D205 are available with the online version of this paper.
doi:10.1099/vir.0.033001-0 pmid:21613446 fatcat:rik4ldncm5g2bcc7b5jtlg2zty