Cargando…
Putative Receptor Binding Domain of Bat-Derived Coronavirus HKU9 Spike Protein: Evolution of Betacoronavirus Receptor Binding Motifs
[Image: see text] The suggested bat origin for Middle East respiratory syndrome coronavirus (MERS-CoV) has revitalized the studies of other bat-derived coronaviruses with respect to interspecies transmission potential. Bat coronavirus (BatCoV) HKU9 is an important betacoronavirus (betaCoV) that is p...
Autores principales: | , , , , , , , , |
---|---|
Formato: | Online Artículo Texto |
Lenguaje: | English |
Publicado: |
American
Chemical Society
2016
|
Acceso en línea: | https://www.ncbi.nlm.nih.gov/pmc/articles/PMC7075523/ https://www.ncbi.nlm.nih.gov/pubmed/27696819 http://dx.doi.org/10.1021/acs.biochem.6b00790 |
_version_ | 1783507051854430208 |
---|---|
author | Huang, Canping Qi, Jianxun Lu, Guangwen Wang, Qihui Yuan, Yuan Wu, Ying Zhang, Yanfang Yan, Jinghua Gao, George F. |
author_facet | Huang, Canping Qi, Jianxun Lu, Guangwen Wang, Qihui Yuan, Yuan Wu, Ying Zhang, Yanfang Yan, Jinghua Gao, George F. |
author_sort | Huang, Canping |
collection | PubMed |
description | [Image: see text] The suggested bat origin for Middle East respiratory syndrome coronavirus (MERS-CoV) has revitalized the studies of other bat-derived coronaviruses with respect to interspecies transmission potential. Bat coronavirus (BatCoV) HKU9 is an important betacoronavirus (betaCoV) that is phylogenetically affiliated with the same genus as MERS-CoV. The bat surveillance data indicated that BatCoV HKU9 has been widely spreading and circulating in bats. This highlights the necessity of characterizing the virus for its potential to cross species barriers. The receptor binding domain (RBD) of the coronavirus spike (S) protein recognizes host receptors to mediate virus entry and is therefore a key factor determining the viral tropism and transmission capacity. In this study, the putative S RBD of BatCoV HKU9 (HKU9-RBD), which is homologous to other betaCoV RBDs that have been structurally and functionally defined, was characterized via a series of biophysical and crystallographic methods. By using surface plasmon resonance, we demonstrated that HKU9-RBD binds to neither SARS-CoV receptor ACE2 nor MERS-CoV receptor CD26. We further determined the atomic structure of HKU9-RBD, which as expected is composed of a core and an external subdomain. The core subdomain fold resembles those of other betaCoV RBDs, whereas the external subdomain is structurally unique with a single helix, explaining the inability of HKU9-RBD to react with either ACE2 or CD26. Via comparison of the available RBD structures, we further proposed a homologous intersubdomain binding mode in betaCoV RBDs that anchors the external subdomain to the core subdomain. The revealed RBD features would shed light on the evolution route of betaCoV. |
format | Online Article Text |
id | pubmed-7075523 |
institution | National Center for Biotechnology Information |
language | English |
publishDate | 2016 |
publisher | American
Chemical Society |
record_format | MEDLINE/PubMed |
spelling | pubmed-70755232020-03-17 Putative Receptor Binding Domain of Bat-Derived Coronavirus HKU9 Spike Protein: Evolution of Betacoronavirus Receptor Binding Motifs Huang, Canping Qi, Jianxun Lu, Guangwen Wang, Qihui Yuan, Yuan Wu, Ying Zhang, Yanfang Yan, Jinghua Gao, George F. Biochemistry [Image: see text] The suggested bat origin for Middle East respiratory syndrome coronavirus (MERS-CoV) has revitalized the studies of other bat-derived coronaviruses with respect to interspecies transmission potential. Bat coronavirus (BatCoV) HKU9 is an important betacoronavirus (betaCoV) that is phylogenetically affiliated with the same genus as MERS-CoV. The bat surveillance data indicated that BatCoV HKU9 has been widely spreading and circulating in bats. This highlights the necessity of characterizing the virus for its potential to cross species barriers. The receptor binding domain (RBD) of the coronavirus spike (S) protein recognizes host receptors to mediate virus entry and is therefore a key factor determining the viral tropism and transmission capacity. In this study, the putative S RBD of BatCoV HKU9 (HKU9-RBD), which is homologous to other betaCoV RBDs that have been structurally and functionally defined, was characterized via a series of biophysical and crystallographic methods. By using surface plasmon resonance, we demonstrated that HKU9-RBD binds to neither SARS-CoV receptor ACE2 nor MERS-CoV receptor CD26. We further determined the atomic structure of HKU9-RBD, which as expected is composed of a core and an external subdomain. The core subdomain fold resembles those of other betaCoV RBDs, whereas the external subdomain is structurally unique with a single helix, explaining the inability of HKU9-RBD to react with either ACE2 or CD26. Via comparison of the available RBD structures, we further proposed a homologous intersubdomain binding mode in betaCoV RBDs that anchors the external subdomain to the core subdomain. The revealed RBD features would shed light on the evolution route of betaCoV. American Chemical Society 2016-10-03 2016-11-01 /pmc/articles/PMC7075523/ /pubmed/27696819 http://dx.doi.org/10.1021/acs.biochem.6b00790 Text en Copyright © 2016 American Chemical Society This article is made available for a limited time sponsored by ACS under the ACS Free to Read License (http://pubs.acs.org/page/policy/freetoread/index.html) , which permits copying and redistribution of the article for non-commercial scholarly purposes. |
spellingShingle | Huang, Canping Qi, Jianxun Lu, Guangwen Wang, Qihui Yuan, Yuan Wu, Ying Zhang, Yanfang Yan, Jinghua Gao, George F. Putative Receptor Binding Domain of Bat-Derived Coronavirus HKU9 Spike Protein: Evolution of Betacoronavirus Receptor Binding Motifs |
title | Putative Receptor Binding Domain of Bat-Derived Coronavirus
HKU9 Spike Protein: Evolution of Betacoronavirus Receptor Binding
Motifs |
title_full | Putative Receptor Binding Domain of Bat-Derived Coronavirus
HKU9 Spike Protein: Evolution of Betacoronavirus Receptor Binding
Motifs |
title_fullStr | Putative Receptor Binding Domain of Bat-Derived Coronavirus
HKU9 Spike Protein: Evolution of Betacoronavirus Receptor Binding
Motifs |
title_full_unstemmed | Putative Receptor Binding Domain of Bat-Derived Coronavirus
HKU9 Spike Protein: Evolution of Betacoronavirus Receptor Binding
Motifs |
title_short | Putative Receptor Binding Domain of Bat-Derived Coronavirus
HKU9 Spike Protein: Evolution of Betacoronavirus Receptor Binding
Motifs |
title_sort | putative receptor binding domain of bat-derived coronavirus
hku9 spike protein: evolution of betacoronavirus receptor binding
motifs |
url | https://www.ncbi.nlm.nih.gov/pmc/articles/PMC7075523/ https://www.ncbi.nlm.nih.gov/pubmed/27696819 http://dx.doi.org/10.1021/acs.biochem.6b00790 |
work_keys_str_mv | AT huangcanping putativereceptorbindingdomainofbatderivedcoronavirushku9spikeproteinevolutionofbetacoronavirusreceptorbindingmotifs AT qijianxun putativereceptorbindingdomainofbatderivedcoronavirushku9spikeproteinevolutionofbetacoronavirusreceptorbindingmotifs AT luguangwen putativereceptorbindingdomainofbatderivedcoronavirushku9spikeproteinevolutionofbetacoronavirusreceptorbindingmotifs AT wangqihui putativereceptorbindingdomainofbatderivedcoronavirushku9spikeproteinevolutionofbetacoronavirusreceptorbindingmotifs AT yuanyuan putativereceptorbindingdomainofbatderivedcoronavirushku9spikeproteinevolutionofbetacoronavirusreceptorbindingmotifs AT wuying putativereceptorbindingdomainofbatderivedcoronavirushku9spikeproteinevolutionofbetacoronavirusreceptorbindingmotifs AT zhangyanfang putativereceptorbindingdomainofbatderivedcoronavirushku9spikeproteinevolutionofbetacoronavirusreceptorbindingmotifs AT yanjinghua putativereceptorbindingdomainofbatderivedcoronavirushku9spikeproteinevolutionofbetacoronavirusreceptorbindingmotifs AT gaogeorgef putativereceptorbindingdomainofbatderivedcoronavirushku9spikeproteinevolutionofbetacoronavirusreceptorbindingmotifs |