2021
DOI: 10.1038/s41467-021-24326-y
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The molecular basis for SARS-CoV-2 binding to dog ACE2

Abstract: SARS-CoV-2 can infect many domestic animals, including dogs. Herein, we show that dog angiotensin-converting enzyme 2 (dACE2) can bind to the SARS-CoV-2 spike (S) protein receptor binding domain (RBD), and that both pseudotyped and authentic SARS-CoV-2 can infect dACE2-expressing cells. We solved the crystal structure of RBD in complex with dACE2 and found that the total number of contact residues, contact atoms, hydrogen bonds and salt bridges at the binding interface in this complex are slightly fewer than t… Show more

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Cited by 49 publications
(49 citation statements)
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“…This can be explained by the missing N-terminal residues (M, Q, S, T which are solved in the crystal structure) in the predicted model, the position and orientation of E22 and D23 (as the terminal residues in the predicted model) were affected during the MD refinement. However, these weakened interactions are also in line with the reported experimental binding affinities of dACE2 ( K D = 123 nM) to RBD as compared to the hACE2 (K D = 18.5 nM) [ 41 ]. Horse ACE2 forms only 3 hydrogen bonds with RBD ( Fig.…”
Section: Resultssupporting
confidence: 85%
See 1 more Smart Citation
“…This can be explained by the missing N-terminal residues (M, Q, S, T which are solved in the crystal structure) in the predicted model, the position and orientation of E22 and D23 (as the terminal residues in the predicted model) were affected during the MD refinement. However, these weakened interactions are also in line with the reported experimental binding affinities of dACE2 ( K D = 123 nM) to RBD as compared to the hACE2 (K D = 18.5 nM) [ 41 ]. Horse ACE2 forms only 3 hydrogen bonds with RBD ( Fig.…”
Section: Resultssupporting
confidence: 85%
“…The dog ACE2 (dACE2) contains a notable variation at N-terminal-helix 1 which results in gapping (deletion) at position 20, revealed in the sequence alignment. While this deletion does not appear to affect the complex structure revealed in the homology model, it slightly differs from the crystal structure of dACE2-RBD that has been solved [ 41 ]. In the case of our homology model of dACE2-RBD ( Fig.…”
Section: Resultsmentioning
confidence: 99%
“…Consistent with the reciprocal experiment in mice described above ( Fig 2E ), RBD binding to the ACE2 of both human and dog was abolished with just these 6 mouse substitutions ( Fig 2J and 2K ). This is surprising given the numerous other sites implicated in mediating human and dog ACE2 interactions with the viral RBD [ 23 , 25 , 63 ]. In both human and dog ACE2, abolition of RBD binding depended on mutating sites 24 and 82 ( Fig 2J and 2K ), despite displaying different residues in human (Q24; M82) and dog (L24; T82) ACE2 ( Fig 2C ).…”
Section: Resultsmentioning
confidence: 99%
“…[ 2 ] demonstrated experimentally that cats and ferrets are susceptible to SARS-CoV-2, but poorly replicates in dogs, chickens, ducks, and pigs. The general structures of the receptor-binding domain (RBD) and angiotensin-converting enzyme 2 (dACE2) of dogs are similar to the human RBD/ACE2 complex; however, the interaction of the two complexes is different, justifying the difficulty of viral replication in this species [ 19 ].…”
Section: Discussionmentioning
confidence: 99%