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.2005 Sep 16;309(5742):1864-8.
doi: 10.1126/science.1116480.

Structure of SARS coronavirus spike receptor-binding domain complexed with receptor

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Structure of SARS coronavirus spike receptor-binding domain complexed with receptor

Fang Li et al. Science..

Abstract

The spike protein (S) of SARS coronavirus (SARS-CoV) attaches the virus to its cellular receptor, angiotensin-converting enzyme 2 (ACE2). A defined receptor-binding domain (RBD) on S mediates this interaction. The crystal structure at 2.9 angstrom resolution of the RBD bound with the peptidase domain of human ACE2 shows that the RBD presents a gently concave surface, which cradles the N-terminal lobe of the peptidase. The atomic details at the interface between the two proteins clarify the importance of residue changes that facilitate efficient cross-species infection and human-to-human transmission. The structure of the RBD suggests ways to make truncated disulfide-stabilized RBD variants for use in the design of coronavirus vaccines.

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