Warning: This is a preliminary report that has not been peer-reviewed. It should not be regarded as conclusive, guide clinical practice/health-related behavior, or be reported in news media as established information.

Structure of dimeric full-length human ACE2 in complex with B0AT1 (Preliminary Report)

Angiotensin-converting enzyme 2 (ACE2) is the surface receptor for SARS coronavirus (SARS-CoV), directly interacting with the spike glycoprotein (S protein). ACE2 is also suggested to be the receptor for the new coronavirus (2019-nCoV), which is causing a serious epidemic in China manifested with severe respiratory syndrome. B0AT1 (SLC6A19) is a ...
neutral amino acid transporter whose surface expression in intestinal cells requires ACE2. Here we present the 2.9 [A] resolution cryo-EM structure of full-length human ACE2 in complex with B0AT1. The complex, assembled as a dimer of ACE2-B0AT1 heterodimers, exhibits open and closed conformations due to the shifts of the peptidase domains (PDs) of ACE2. A newly resolved Collectrin-like domain (CLD) on ACE2 mediates homo-dimerization. Structural modelling suggests that the ACE2-B0AT1 complex can bind two S proteins simultaneously, providing important clues to the molecular basis for coronavirus recognition and infection.
Date: Feb. 18, 2020
Status: Preliminary Report
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