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Receptor and viral determinants of SARS‐coronavirus adaptation to human ACE2

Identifieur interne : 000E62 ( Ncbi/Curation ); précédent : 000E61; suivant : 000E63

Receptor and viral determinants of SARS‐coronavirus adaptation to human ACE2

Auteurs : Wenhui Li ; Chengsheng Zhang ; Jianhua Sui ; Jens H. Kuhn ; Michael J. Moore ; Shiwen Luo ; Swee-Kee Wong ; I-Chueh Huang ; Keming Xu ; Natalya Vasilieva ; Akikazu Murakami ; Yaqing He ; Wayne A. Marasco ; Yi Guan ; Hyeryun Choe ; Michael Farzan

Source :

RBID : PMC:1142572

Descripteurs français

English descriptors

Abstract

Human angiotensin‐converting enzyme 2 (ACE2) is a functional receptor for SARS coronavirus (SARS‐CoV). Here we identify the SARS‐CoV spike (S)‐protein‐binding site on ACE2. We also compare S proteins of SARS‐CoV isolated during the 2002–2003 SARS outbreak and during the much less severe 2003–2004 outbreak, and from palm civets, a possible source of SARS‐CoV found in humans. All three S proteins bound to and utilized palm‐civet ACE2 efficiently, but the latter two S proteins utilized human ACE2 markedly less efficiently than did the S protein obtained during the earlier human outbreak. The lower affinity of these S proteins could be complemented by altering specific residues within the S‐protein‐binding site of human ACE2 to those of civet ACE2, or by altering S‐protein residues 479 and 487 to residues conserved during the 2002–2003 outbreak. Collectively, these data describe molecular interactions important to the adaptation of SARS‐CoV to human cells, and provide insight into the severity of the 2002–2003 SARS epidemic.


Url:
DOI: 10.1038/sj.emboj.7600640
PubMed: 15791205
PubMed Central: 1142572

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PMC:1142572

Le document en format XML

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<p>Human angiotensin‐converting enzyme 2 (ACE2) is a functional receptor for SARS coronavirus (SARS‐CoV). Here we identify the SARS‐CoV spike (S)‐protein‐binding site on ACE2. We also compare S proteins of SARS‐CoV isolated during the 2002–2003 SARS outbreak and during the much less severe 2003–2004 outbreak, and from palm civets, a possible source of SARS‐CoV found in humans. All three S proteins bound to and utilized palm‐civet ACE2 efficiently, but the latter two S proteins utilized human ACE2 markedly less efficiently than did the S protein obtained during the earlier human outbreak. The lower affinity of these S proteins could be complemented by altering specific residues within the S‐protein‐binding site of human ACE2 to those of civet ACE2, or by altering S‐protein residues 479 and 487 to residues conserved during the 2002–2003 outbreak. Collectively, these data describe molecular interactions important to the adaptation of SARS‐CoV to human cells, and provide insight into the severity of the 2002–2003 SARS epidemic.</p>
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