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- PDB-8woy: Cryo-EM structure of SARS-CoV-2 Omicron BA.4/5 RBD in complex wit... -
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Basic information
Entry | Database: PDB / ID: 8woy | ||||||
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Title | Cryo-EM structure of SARS-CoV-2 Omicron BA.4/5 RBD in complex with rabbit ACE2 (local refinement) | ||||||
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![]() | VIRAL PROTEIN / Severe acute respiratory syndrome coronavirus 2 / Angiotensin-converting enzyme 2 / Spike protein | ||||||
Function / homology | ![]() 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 / tryptophan transport / regulation of cardiac conduction / peptidyl-dipeptidase activity / carboxypeptidase activity / positive regulation of cardiac muscle contraction / negative regulation of signaling receptor activity ...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 / tryptophan transport / regulation of cardiac conduction / peptidyl-dipeptidase activity / carboxypeptidase activity / positive regulation of cardiac muscle contraction / negative regulation of signaling receptor activity / brush border membrane / regulation of transmembrane transporter activity / cilium / metallopeptidase activity / virus receptor activity / endopeptidase activity / Maturation of spike protein / viral translation / Translation of Structural Proteins / Virion Assembly and Release / host cell surface / host extracellular space / symbiont-mediated-mediated suppression of host tetherin activity / Induction of Cell-Cell Fusion / structural constituent of virion / entry receptor-mediated virion attachment to host cell / host cell endoplasmic reticulum-Golgi intermediate compartment membrane / membrane fusion / Attachment and Entry / positive regulation of viral entry into host cell / receptor-mediated virion attachment to host cell / host cell surface receptor binding / symbiont-mediated suppression of host innate immune response / receptor ligand activity / endocytosis involved in viral entry into host cell / apical plasma membrane / fusion of virus membrane with host plasma membrane / fusion of virus membrane with host endosome membrane / viral envelope / virion attachment to host cell / SARS-CoV-2 activates/modulates innate and adaptive immune responses / host cell plasma membrane / virion membrane / cell surface / proteolysis / extracellular space / identical protein binding / membrane / metal ion binding / plasma membrane / cytoplasm Similarity search - Function | ||||||
Biological species | ![]() ![]() ![]() ![]() | ||||||
Method | ELECTRON MICROSCOPY / single particle reconstruction / cryo EM / Resolution: 3.14 Å | ||||||
![]() | Li, L.J. / Shi, K.Y. / Yu, G.H. / Gao, G.F. | ||||||
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![]() | ![]() Title: Structural basis of increased binding affinities of spikes from SARS-CoV-2 Omicron variants to rabbit and hare ACE2s reveals the expanding host tendency. Authors: Kaiyuan Shi / Linjie Li / Chunliang Luo / Zepeng Xu / Baihan Huang / Sufang Ma / Kefang Liu / Guanghui Yu / George F Gao / ![]() Abstract: The potential host range of severe acute respiratory syndrome coronavirus 2 (SARS-CoV-2) has been expanding alongside its evolution during the pandemic, with rabbits and hares being considered ...The potential host range of severe acute respiratory syndrome coronavirus 2 (SARS-CoV-2) has been expanding alongside its evolution during the pandemic, with rabbits and hares being considered important potential hosts, supported by a report of rabbit sero-prevalence in nature. We measured the binding affinities of rabbit and hare angiotensin-converting enzyme 2 (ACE2) with receptor-binding domains (RBDs) from SARS-CoV, SARS-CoV-2, and its variants and found that rabbit and hare ACE2s had broad variant tropism, with significantly enhanced affinities to Omicron BA.4/5 and its subsequent-emerged sub-variants (>10 fold). The structures of rabbit ACE2 complexed with either SARS-CoV-2 prototype (PT) or Omicron BA.4/5 spike (S) proteins were determined, thereby unveiling the importance of rabbit ACE2 Q34 in RBD-interaction and elucidating the molecular basis of the enhanced binding with Omicron BA.4/5 RBD. These results address the highly enhanced risk of rabbits infecting SARS-CoV-2 Omicron sub-variants and the importance of constant surveillance.IMPORTANCEThe severe acute respiratory syndrome coronavirus 2 (SARS-CoV-2) pandemic has swept the globe and caused immense health and economic damage. SARS-CoV-2 has demonstrated a broad host range, indicating a high risk of interspecies transmission and adaptive mutation. Therefore, constant monitoring for potential hosts is of immense importance. In this study, we found that Omicron BA.4/5 and subsequent-emerged sub-variants exhibited enhanced binding to both rabbit and hare angiotensin-converting enzyme 2 (ACE2), and we elucidated the structural mechanism of their recognition. From the structure, we found that Q34, a unique residue of rabbit ACE2 compared to other ACE2 orthologs, plays an important role in ACE2 recognition. These results address the probability of rabbits/hares being potential hosts of SARS-CoV-2 and broaden our knowledge regarding the molecular mechanism of SARS-CoV-2 interspecies transmission. | ||||||
History |
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Structure visualization
Structure viewer | Molecule: ![]() ![]() |
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PDBx/mmCIF format | ![]() | 171.1 KB | Display | ![]() |
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PDB format | ![]() | 131.2 KB | Display | ![]() |
PDBx/mmJSON format | ![]() | Tree view | ![]() | |
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-Validation report
Summary document | ![]() | 416.7 KB | Display | ![]() |
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Full document | ![]() | 419.8 KB | Display | |
Data in XML | ![]() | 15.6 KB | Display | |
Data in CIF | ![]() | 23.4 KB | Display | |
Arichive directory | ![]() ![]() | HTTPS FTP |
-Related structure data
Related structure data | ![]() 37702MC ![]() 8woxC ![]() 8wozC M: map data used to model this data C: citing same article ( |
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Similar structure data | Similarity search - Function & homology ![]() |
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Assembly
Deposited unit | ![]()
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Components
#1: Protein | Mass: 69017.414 Da / Num. of mol.: 1 Source method: isolated from a genetically manipulated source Source: (gene. exp.) ![]() ![]() ![]() ![]() References: UniProt: G1TEF4, Hydrolases; Acting on peptide bonds (peptidases) |
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#2: Protein | Mass: 26084.525 Da / Num. of mol.: 1 Source method: isolated from a genetically manipulated source Source: (gene. exp.) ![]() ![]() Gene: S, 2 / Variant: Omicron BA.4/5 / Production host: ![]() |
#3: Chemical | ChemComp-ZN / |
#4: Sugar | ChemComp-NAG / |
Has ligand of interest | Y |
Has protein modification | Y |
-Experimental details
-Experiment
Experiment | Method: ELECTRON MICROSCOPY |
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EM experiment | Aggregation state: PARTICLE / 3D reconstruction method: single particle reconstruction |
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Sample preparation
Component | Name: Cryo-EM structure of SARS-CoV-2 Omicron BA.4/5 RBD in complex with rabbit ACE2 (local refinement) Type: COMPLEX / Entity ID: #1-#2 / Source: MULTIPLE SOURCES |
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Source (natural) | Organism: ![]() ![]() |
Source (recombinant) | Organism: ![]() |
Buffer solution | pH: 8 |
Specimen | Embedding applied: NO / Shadowing applied: NO / Staining applied: NO / Vitrification applied: YES |
Vitrification | Cryogen name: ETHANE |
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Electron microscopy imaging
Experimental equipment | ![]() Model: Titan Krios / Image courtesy: FEI Company |
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Microscopy | Model: FEI TITAN KRIOS |
Electron gun | Electron source: ![]() |
Electron lens | Mode: BRIGHT FIELD / Nominal defocus max: 2000 nm / Nominal defocus min: 1000 nm |
Image recording | Electron dose: 50 e/Å2 / Film or detector model: GATAN K3 (6k x 4k) |
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Processing
EM software | Name: PHENIX / Version: 1.20.1_4487: / Category: model refinement | ||||||||||||||||||||||||
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CTF correction | Type: PHASE FLIPPING AND AMPLITUDE CORRECTION | ||||||||||||||||||||||||
3D reconstruction | Resolution: 3.14 Å / Resolution method: FSC 0.143 CUT-OFF / Num. of particles: 317529 / Symmetry type: POINT | ||||||||||||||||||||||||
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