Genomics and evolution of Aedes-borne flaviviruses - PubMed

Affiliations

• PMID: 19741066
• DOI: 10.1099/vir.0.014506-0

Genomics and evolution of Aedes-borne flaviviruses

Gilda Grard et al. J Gen Virol. 2010 Jan.

Abstract

We analysed the complete coding sequences of all recognized species of Aedes-borne flavivirus, including previously uncharacterized viruses within the yellow fever virus (YFV), Spondweni virus (SPOV) and dengue virus (DENV) groups. Two major phylogenetic lineages were revealed: one included the YFV and Entebbe bat virus groups, and the other included the DENV, SPOV and Culex-borne flavivirus groups. This analysis supported previous evidence that Culex-borne flaviviruses have evolved from ancestral Aedes-borne viruses. However, the topology at the junction between these lineages remains complex and may be refined by the discovery of viruses related to the Kedougou virus. Additionally, viral evolution was found to be associated with the appearance of new biological characteristics; mutations that may modify the envelope protein structure were identified for seven viruses within the YFV group, and an expansion of host-vector range was identified in the two major evolutionary lineages, which in turn may facilitate the emergence of mosquito-borne flaviviruses.

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