The replicase polyprotein 1a of the human severe acute respiratory syndrome coronavirus (SARS-CoV) is post-translationally cleaved by virally encoded proteases to generate non-structural proteins (nsps). Viral nsps induce the formation of ER-bound double membrane vesicles (DMV) in host cells post infection. These DMVs are decorated with microtubule-associated proteins 1A/1B light chain 3B (MAP1LC3B) proteins that are involved in autophagosome formation. However, there is no evidence that DMVs are recruited to the autophagy machinery. Immunofluorescence studies show that nsp8 colocalizes with MAP1LC3B suggesting a binding event (Prentice E. et al 2004).
Prentice, E, McAuliffe, J, Lu, X, Subbarao, K, Denison, MR
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