Involvement of ATP synthase β subunit in chikungunya virus entry into insect cells

Chanida Fongsaran, Krit Jirakanwisal, Atichat Kuadkitkan, Nitwara Wikan, Phitchayapak Wintachai, Chutima Thepparit, Sukathida Ubol, Narumon Phaonakrop, Sittiruk Roytrakul, Duncan R. Smith

Research output: Contribution to journalArticlepeer-review

48 Scopus citations

Abstract

Chikungunya virus (CHIKV), the virus responsible for the disease chikungunya fever in humans, is transmitted by Aedes mosquitoes. While significant progress has been made in understanding the process by which CHIKV enters into mammalian cells, far less progress has been made in understanding the CHIKV entry process in insect cells. This study sought to identify mosquito-cell-expressed CHIKV-binding proteins through a combination of virus overlay protein binding assays (VOPBA) and mass spectroscopy. A 50-kDa CHIKV-binding protein was identified as the ATP synthase β subunit (ATPSβ). Co-immunoprecipitation studies confirmed the interaction, and colocalization analysis showed cell-surface and intracellular co-localization between CHIKV and ATPSβ. Both antibody inhibition and siRNA-mediated downregulation experiments targeted to ATPSβ showed a significant reduction in viral entry and virus production. These results suggest that ATPSβ is a CHIKV-binding protein capable of mediating the entry of CHIKV into insect cells.

Original languageEnglish (US)
Pages (from-to)3353-3364
Number of pages12
JournalArchives of virology
Volume159
Issue number12
DOIs
StatePublished - Dec 2014
Externally publishedYes

ASJC Scopus subject areas

  • Virology

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