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Coronavirus E protein is a small membrane protein found in the virus envelope. Different coronavirus E proteins share striking biochemical and functional similarities, but sequence conservation is limited. In this report, we studied the E protein topology from the new SARS-CoV-2 virus both in microsomal membranes and in mammalian cells. Experimental data reveal that E protein is a single-spanning membrane protein with the N-terminus being translocated across the membrane, while the C-terminus is exposed to the cytoplasmic side (Nt(lum)/Ct(cyt)). The defined membrane protein topology of SARS-CoV-2 E protein may provide a useful framework to understand its interaction with other viral and host components and contribute to establish the basis to tackle the pathogenesis of SARS-CoV-2.
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document_parses/pdf_json/f763e7edf2ae2a5596b0fdc6889e6450c29fa0d2.json
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document_parses/pmc_json/PMC7536074.xml.json
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SARS-CoV-2 envelope protein topology in eukaryotic membranes
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