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Hoffmann, R. A wiki for the life sciences where authorship matters. Nature Genetics (2008)

Human herpesvirus 1 protein US3 induces an inhibition of mitochondrial electron transport.

Previous studies have identified virus proteins that traffic to mitochondria and may affect mitochondrial function. Here, it is reported that Human herpesvirus 1 (HHV-1, herpes simplex virus 1) and influenza virus reduced mitochondrial respiration, whilst Measles virus, cytomegalovirus, coxsackievirus B4 and Feline calicivirus did not. The inhibition of total cellular respiration was caused by a block in the mitochondrial electron-transport chain. This effect occurred during beta-phase protein synthesis and the inhibition of mitochondrial respiration could be reproduced by ectopic expression of the beta-phase protein US3. An HHV-1 mutant lacking this protein failed to inhibit oxygen consumption in infected cells relative to controls. It was concluded that US3 was mediating the suppression of mitochondrial respiration following HHV-1 infection. The integrity of the electron-transport chain in HHV-1-infected cells was analysed further and the site of the block in electron transport was located between complexes II and III, a site previously shown to be affected by Poliovirus.[1]


  1. Human herpesvirus 1 protein US3 induces an inhibition of mitochondrial electron transport. Derakhshan, M., Willcocks, M.M., Salako, M.A., Kass, G.E., Carter, M.J. J. Gen. Virol. (2006) [Pubmed]
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