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- PDB-8xzb: The structure of fox ACE2 and SARS-CoV RBD complex -

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Basic information

Entry
Database: PDB / ID: 8xzb
TitleThe structure of fox ACE2 and SARS-CoV RBD complex
Components
  • Angiotensin-converting enzyme
  • Spike protein S1
KeywordsVIRAL PROTEIN / fox ACE2 SARS-CoV RBD
Function / homology
Function and homology information


Maturation of spike protein / Translation of Structural Proteins / Virion Assembly and Release / Hydrolases; Acting on peptide bonds (peptidases) / positive regulation of L-proline import across plasma membrane / angiotensin-mediated drinking behavior / positive regulation of gap junction assembly / regulation of cardiac conduction / peptidyl-dipeptidase activity / transporter activator activity ...Maturation of spike protein / Translation of Structural Proteins / Virion Assembly and Release / Hydrolases; Acting on peptide bonds (peptidases) / positive regulation of L-proline import across plasma membrane / angiotensin-mediated drinking behavior / positive regulation of gap junction assembly / regulation of cardiac conduction / peptidyl-dipeptidase activity / transporter activator activity / carboxypeptidase activity / Attachment and Entry / brush border membrane / metallopeptidase activity / SARS-CoV-1 activates/modulates innate immune responses / virus receptor activity / regulation of inflammatory response / endopeptidase activity / symbiont-mediated-mediated suppression of host tetherin activity / membrane fusion / entry receptor-mediated virion attachment to host cell / host cell endoplasmic reticulum-Golgi intermediate compartment membrane / positive regulation of viral entry into host cell / receptor-mediated virion attachment to host cell / host cell surface receptor binding / cilium / symbiont-mediated suppression of host innate immune response / endocytosis involved in viral entry into host cell / fusion of virus membrane with host plasma membrane / fusion of virus membrane with host endosome membrane / viral envelope / host cell plasma membrane / virion membrane / cell surface / negative regulation of transcription by RNA polymerase II / proteolysis / extracellular space / metal ion binding / identical protein binding / membrane / cytoplasm
Similarity search - Function
Spike (S) protein S1 subunit, receptor-binding domain, SARS-CoV / Collectrin domain / Renal amino acid transporter / Collectrin-like domain profile. / Peptidase M2, peptidyl-dipeptidase A / Angiotensin-converting enzyme / Peptidase family M2 domain profile. / Spike (S) protein S1 subunit, N-terminal domain, SARS-CoV-like / Spike glycoprotein, N-terminal domain superfamily / Spike S1 subunit, receptor binding domain superfamily, betacoronavirus ...Spike (S) protein S1 subunit, receptor-binding domain, SARS-CoV / Collectrin domain / Renal amino acid transporter / Collectrin-like domain profile. / Peptidase M2, peptidyl-dipeptidase A / Angiotensin-converting enzyme / Peptidase family M2 domain profile. / Spike (S) protein S1 subunit, N-terminal domain, SARS-CoV-like / Spike glycoprotein, N-terminal domain superfamily / Spike S1 subunit, receptor binding domain superfamily, betacoronavirus / Spike glycoprotein, betacoronavirus / Betacoronavirus spike (S) glycoprotein S1 subunit N-terminal (NTD) domain profile. / Betacoronavirus spike (S) glycoprotein S1 subunit C-terminal (CTD) domain profile. / Spike (S) protein S1 subunit, receptor-binding domain, betacoronavirus / Betacoronavirus spike glycoprotein S1, receptor binding / Spike glycoprotein S1, N-terminal domain, betacoronavirus-like / Betacoronavirus-like spike glycoprotein S1, N-terminal / Spike glycoprotein S2 superfamily, coronavirus / Spike glycoprotein S2, coronavirus, heptad repeat 1 / Spike glycoprotein S2, coronavirus, heptad repeat 2 / Coronavirus spike (S) glycoprotein S2 subunit heptad repeat 1 (HR1) region profile. / Coronavirus spike (S) glycoprotein S2 subunit heptad repeat 2 (HR2) region profile. / Spike glycoprotein S2, coronavirus / Coronavirus spike glycoprotein S2
Similarity search - Domain/homology
Angiotensin-converting enzyme / Spike glycoprotein
Similarity search - Component
Biological speciesVulpes vulpes (red fox)
Severe acute respiratory syndrome-related coronavirus
MethodELECTRON MICROSCOPY / single particle reconstruction / cryo EM / Resolution: 3.12 Å
Authorssun, J.Q.
Funding support China, 1items
OrganizationGrant numberCountry
National Natural Science Foundation of China (NSFC)82225021 China
CitationJournal: Virol Sin / Year: 2024
Title: The binding and structural basis of fox ACE2 to RBDs from different sarbecoviruses.
Authors: Junsen Chen / Junqing Sun / Zepeng Xu / Linjie Li / Xinrui Kang / Chunliang Luo / Qi Wang / Xueyang Guo / Yan Li / Kefang Liu / Ying Wu /
Abstract: Foxes are susceptible to SARS-CoV-2 in laboratory settings, and there have also been reports of natural infections of both SARS-CoV and SARS-CoV-2 in foxes. In this study, we assessed the binding ...Foxes are susceptible to SARS-CoV-2 in laboratory settings, and there have also been reports of natural infections of both SARS-CoV and SARS-CoV-2 in foxes. In this study, we assessed the binding capacities of fox ACE2 to important sarbecoviruses, including SARS-CoV, SARS-CoV-2, and animal-origin SARS-CoV-2 related viruses. Our findings demonstrated that fox ACE2 exhibits broad binding capabilities to receptor-binding domains (RBDs) of sarbecoviruses. We further determined the cryo-EM structures of fox ACE2 complexed with RBDs of SARS-CoV, SARS-CoV-2 prototype (PT), and Omicron BF.7. Through structural analysis, we identified that the K417 mutation can weaken the ability of SARS-CoV-2 sub-variants to bind to fox ACE2, thereby reducing the susceptibility of foxes to SARS-CoV-2 sub-variants. In addition, the Y498 residue in the SARS-CoV RBD plays a crucial role in forming a vital cation-π interaction with K353 in the fox ACE2 receptor. This interaction is the primary determinant for the higher affinity of the SARS-CoV RBD compared to that of the SARS-CoV-2 PT RBD. These results indicate that foxes serve as potential hosts for numerous sarbecoviruses, highlighting the critical importance of surveillance efforts.
History
DepositionJan 21, 2024Deposition site: PDBJ / Processing site: PDBC
Revision 1.0Jul 3, 2024Provider: repository / Type: Initial release
Revision 1.1Jul 24, 2024Group: Data collection / Database references / Category: citation / citation_author / em_admin
Item: _citation.journal_abbrev / _citation.journal_id_CSD ..._citation.journal_abbrev / _citation.journal_id_CSD / _citation.journal_id_ISSN / _citation.pdbx_database_id_DOI / _citation.pdbx_database_id_PubMed / _citation.title / _citation.year / _em_admin.last_update
Revision 1.2Sep 11, 2024Group: Data collection / Database references / Category: citation / em_admin
Item: _citation.journal_volume / _citation.page_first ..._citation.journal_volume / _citation.page_first / _citation.page_last / _em_admin.last_update
Revision 1.3Oct 23, 2024Group: Data collection / Structure summary
Category: em_admin / pdbx_entry_details / pdbx_modification_feature
Item: _em_admin.last_update / _pdbx_entry_details.has_protein_modification

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Structure visualization

Structure viewerMolecule:
MolmilJmol/JSmol

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Assembly

Deposited unit
A: Angiotensin-converting enzyme
C: Spike protein S1
hetero molecules


Theoretical massNumber of molelcules
Total (without water)96,9593
Polymers96,8942
Non-polymers651
Water00
1


  • Idetical with deposited unit
  • defined by author
  • Evidence: electron microscopy, not applicable
TypeNameSymmetry operationNumber
identity operation1_5551

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Components

#1: Protein Angiotensin-converting enzyme / FOX ACE2


Mass: 71030.781 Da / Num. of mol.: 1
Source method: isolated from a genetically manipulated source
Source: (gene. exp.) Vulpes vulpes (red fox) / Gene: ACE2 / Production host: Homo sapiens (human)
References: UniProt: A0A3Q7RAT9, Hydrolases; Acting on peptide bonds (peptidases)
#2: Protein Spike protein S1


Mass: 25863.234 Da / Num. of mol.: 1 / Fragment: RBD
Source method: isolated from a genetically manipulated source
Source: (gene. exp.) Severe acute respiratory syndrome-related coronavirus
Gene: S, 2 / Production host: Homo sapiens (human) / References: UniProt: P59594
#3: Chemical ChemComp-ZN / ZINC ION


Mass: 65.409 Da / Num. of mol.: 1 / Source method: obtained synthetically / Formula: Zn / Feature type: SUBJECT OF INVESTIGATION
Has ligand of interestY
Has protein modificationY

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Experimental details

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Experiment

ExperimentMethod: ELECTRON MICROSCOPY
EM experimentAggregation state: PARTICLE / 3D reconstruction method: single particle reconstruction

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Sample preparation

ComponentName: The structure of fox ACE2 and PT RBD complex / Type: COMPLEX / Entity ID: #1-#2 / Source: RECOMBINANT
Source (natural)Organism: Severe acute respiratory syndrome coronavirus 2
Source (recombinant)Organism: Homo sapiens (human)
Buffer solutionpH: 8
SpecimenConc.: 0.01 mg/ml / Embedding applied: NO / Shadowing applied: NO / Staining applied: NO / Vitrification applied: YES
VitrificationCryogen name: ETHANE

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Electron microscopy imaging

Experimental equipment
Model: Titan Krios / Image courtesy: FEI Company
MicroscopyModel: FEI TITAN KRIOS
Electron gunElectron source: FIELD EMISSION GUN / Accelerating voltage: 300 kV / Illumination mode: FLOOD BEAM
Electron lensMode: BRIGHT FIELD / Nominal defocus max: 2000 nm / Nominal defocus min: 1000 nm
Image recordingElectron dose: 60 e/Å2 / Film or detector model: GATAN K3 (6k x 4k)

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Processing

CTF correctionType: PHASE FLIPPING AND AMPLITUDE CORRECTION
3D reconstructionResolution: 3.12 Å / Resolution method: FSC 0.143 CUT-OFF / Num. of particles: 345875 / Symmetry type: POINT

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