8HEB | pdb_00008heb

SARS-CoV-2 Spike trimer in complex with RmAb 9H1 Fab in the class 1 conformation

PDB DOI: https://doi.org/10.2210/pdb8HEB/pdb
EM Map EMD-34686: EMDB EMDataResource

Classification: VIRAL PROTEIN/IMMUNE SYSTEM
Organism(s): Severe acute respiratory syndrome coronavirus 2, Oryctolagus cuniculus
Expression System: Homo sapiens
Mutation(s): Yes

Deposited: 2022-11-08 Released: 2023-04-26
Deposition Author(s): Guo, H., Gao, Y., Lu, Y., Yang, H., Ji, X.
Funding Organization(s): Other government

Experimental Data Snapshot

Method: ELECTRON MICROSCOPY
Resolution: 3.53 Å
Aggregation State: PARTICLE
Reconstruction Method: SINGLE PARTICLE

wwPDB Validation 3D Report Full Report

This is version 1.2 of the entry. See complete history.

Literature

Mechanism of an RBM-targeted rabbit monoclonal antibody 9H1 neutralizing SARS-CoV-2.

Chu, X., Ding, X., Yang, Y., Lu, Y., Li, T., Gao, Y., Zheng, L., Xiao, H., Yang, T., Cheng, H., Huang, H., Liu, Y., Lou, Y., Wu, C., Chen, Y., Yang, H., Ji, X., Guo, H.

(2023) Biochem Biophys Res Commun 660: 43-49

PubMed: 37062240 Search on PubMed Search on PubMed Central
DOI: https://doi.org/10.1016/j.bbrc.2023.04.002
Primary Citation Related Structures:
8HEB, 8HEC, 8HED

PubMed Abstract:
The COVID-19 pandemic, caused by SARS-CoV-2, has led to over 750 million infections and 6.8 million deaths worldwide since late 2019. Due to the continuous evolution of SARS-CoV-2, many significant variants have emerged, creating ongoing challenges to the prevention and treatment of the pandemic. Therefore, the study of antibody responses against SARS-CoV-2 is essential for the development of vaccines and therapeutics. Here we perform single particle cryo-electron microscopy (cryo-EM) structure determination of a rabbit monoclonal antibody (RmAb) 9H1 in complex with the SARS-CoV-2 wild-type (WT) spike trimer. Our structural analysis shows that 9H1 interacts with the receptor-binding motif (RBM) region of the receptor-binding domain (RBD) on the spike protein and by directly competing with angiotensin-converting enzyme 2 (ACE2), it blocks the binding of the virus to the receptor and achieves neutralization. Our findings suggest that utilizing rabbit-derived mAbs provides valuable insights into the molecular interactions between neutralizing antibodies and spike proteins and may also facilitate the development of therapeutic antibodies and expand the antibody library.

Organizational Affiliation

The State Key Laboratory of Pharmaceutical Biotechnology, School of Life Sciences, Nanjing University, Nanjing, Jiangsu, 210023, China.

Macromolecule Content

Total Structure Weight: 487.5 kDa
Atom Count: 29,912
Modeled Residue Count: 3,769
Deposited Residue Count: 4,305
Unique protein chains: 3

Macromolecules

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| 3D Structure

Entity ID: 1
Molecule	Chains	Sequence Length	Organism	Details	Image
Spike glycoprotein	A, B, C	1,208	Severe acute respiratory syndrome coronavirus 2	Mutation(s): 5 Gene Names: S, 2
UniProt
Find proteins for P0DTC2 (Severe acute respiratory syndrome coronavirus 2) Explore P0DTC2 Go to UniProtKB: P0DTC2
Entity Groups
Sequence Clusters	30% Identity 50% Identity 70% Identity 90% Identity 95% Identity 100% Identity
UniProt Group	P0DTC2
Glycosylation
Glycosylation Sites: 15	Glycosylation Focus chain A Focus chain B Focus chain C	Go to GlyGen: P0DTC2-1
Sequence Annotations Expand
Reference Sequence

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| 3D Structure

Entity ID: 2
Molecule	Chains	Sequence Length	Organism	Details	Image
rabbit antibody 9H1 light chain	D, F, H	110	Oryctolagus cuniculus	Mutation(s): 0

Find similar proteins by:

| 3D Structure

Entity ID: 3
Molecule	Chains	Sequence Length	Organism	Details	Image
rabbit antibody 9H1 heavy chain	E, G, I	117	Oryctolagus cuniculus	Mutation(s): 0

Oligosaccharides

Help

Entity ID: 4
Molecule	Chains	Length	2D Diagram	Glycosylation	D Interactions
2-acetamido-2-deoxy-beta-D-glucopyranose-(1-4)-2-acetamido-2-deoxy-beta-D-glucopyranose	AA [auth a], J [auth O], K [auth J], L [auth K], M [auth L], AA [auth a], J [auth O], K [auth J], L [auth K], M [auth L], N [auth M], O [auth N], P, Q, R, S, T, U, V, W, X, Y, Z	2		N-Glycosylation	Interactions Focus chain AA [auth a] Focus chain J [auth O] Focus chain K [auth J] Focus chain L [auth K] Focus chain M [auth L] Focus chain N [auth M] Focus chain O [auth N] Focus chain P Focus chain Q Focus chain R Focus chain S Focus chain T Focus chain U Focus chain V Focus chain W Focus chain X Focus chain Y Focus chain Z Interactions & Density Focus chain AA [auth a] Focus chain J [auth O] Focus chain K [auth J] Focus chain L [auth K] Focus chain M [auth L] Focus chain N [auth M] Focus chain O [auth N] Focus chain P Focus chain Q Focus chain R Focus chain S Focus chain T Focus chain U Focus chain V Focus chain W Focus chain X Focus chain Y Focus chain Z
Glycosylation Resources
GlyTouCan: G42666HT GlyCosmos: G42666HT GlyGen: G42666HT

Small Molecules

Ligands 1 Unique
ID	Chains	Name / Formula / InChI Key	2D Diagram	3D Interactions
NAG (Subject of Investigation/LOI) Query on NAG Download:Ideal Coordinates CCD File SDF format, chain ZA [auth C] SDF format, chain YA [auth C] SDF format, chain XA [auth C] SDF format, chain WA [auth C] SDF format, chain VA [auth C] SDF format, chain UA [auth C] SDF format, chain TA [auth C] SDF format, chain SA [auth B] SDF format, chain RA [auth B] SDF format, chain QA [auth B] SDF format, chain PA [auth B] SDF format, chain OA [auth B] SDF format, chain NA [auth B] SDF format, chain MA [auth B] SDF format, chain LA [auth B] SDF format, chain KA [auth B] SDF format, chain JA [auth A] SDF format, chain IA [auth A] SDF format, chain HA [auth A] SDF format, chain GA [auth A] SDF format, chain FA [auth A] SDF format, chain EA [auth A] SDF format, chain DA [auth A] SDF format, chain CA [auth A] SDF format, chain BB [auth C] SDF format, chain BA [auth A] SDF format, chain AB [auth C] MOL2 format, chain ZA [auth C] MOL2 format, chain YA [auth C] MOL2 format, chain XA [auth C] MOL2 format, chain WA [auth C] MOL2 format, chain VA [auth C] MOL2 format, chain UA [auth C] MOL2 format, chain TA [auth C] MOL2 format, chain SA [auth B] MOL2 format, chain RA [auth B] MOL2 format, chain QA [auth B] MOL2 format, chain PA [auth B] MOL2 format, chain OA [auth B] MOL2 format, chain NA [auth B] MOL2 format, chain MA [auth B] MOL2 format, chain LA [auth B] MOL2 format, chain KA [auth B] MOL2 format, chain JA [auth A] MOL2 format, chain IA [auth A] MOL2 format, chain HA [auth A] MOL2 format, chain GA [auth A] MOL2 format, chain FA [auth A] MOL2 format, chain EA [auth A] MOL2 format, chain DA [auth A] MOL2 format, chain CA [auth A] MOL2 format, chain BB [auth C] MOL2 format, chain BA [auth A] MOL2 format, chain AB [auth C] mmCIF format, chain ZA [auth C] mmCIF format, chain YA [auth C] mmCIF format, chain XA [auth C] mmCIF format, chain WA [auth C] mmCIF format, chain VA [auth C] mmCIF format, chain UA [auth C] mmCIF format, chain TA [auth C] mmCIF format, chain SA [auth B] mmCIF format, chain RA [auth B] mmCIF format, chain QA [auth B] mmCIF format, chain PA [auth B] mmCIF format, chain OA [auth B] mmCIF format, chain NA [auth B] mmCIF format, chain MA [auth B] mmCIF format, chain LA [auth B] mmCIF format, chain KA [auth B] mmCIF format, chain JA [auth A] mmCIF format, chain IA [auth A] mmCIF format, chain HA [auth A] mmCIF format, chain GA [auth A] mmCIF format, chain FA [auth A] mmCIF format, chain EA [auth A] mmCIF format, chain DA [auth A] mmCIF format, chain CA [auth A] mmCIF format, chain BB [auth C] mmCIF format, chain BA [auth A] mmCIF format, chain AB [auth C]	AB [auth C] BA [auth A] BB [auth C] CA [auth A] DA [auth A] AB [auth C], BA [auth A], BB [auth C], CA [auth A], DA [auth A], EA [auth A], FA [auth A], GA [auth A], HA [auth A], IA [auth A], JA [auth A], KA [auth B], LA [auth B], MA [auth B], NA [auth B], OA [auth B], PA [auth B], QA [auth B], RA [auth B], SA [auth B], TA [auth C], UA [auth C], VA [auth C], WA [auth C], XA [auth C], YA [auth C], ZA [auth C]	2-acetamido-2-deoxy-beta-D-glucopyranose C₈ H₁₅ N O₆ OVRNDRQMDRJTHS-FMDGEEDCSA-N		Interactions Focus chain AB [auth C] Focus chain BA [auth A] Focus chain BB [auth C] Focus chain CA [auth A] Focus chain DA [auth A] Focus chain EA [auth A] Focus chain FA [auth A] Focus chain GA [auth A] Focus chain HA [auth A] Focus chain IA [auth A] Focus chain JA [auth A] Focus chain KA [auth B] Focus chain LA [auth B] Focus chain MA [auth B] Focus chain NA [auth B] Focus chain OA [auth B] Focus chain PA [auth B] Focus chain QA [auth B] Focus chain RA [auth B] Focus chain SA [auth B] Focus chain TA [auth C] Focus chain UA [auth C] Focus chain VA [auth C] Focus chain WA [auth C] Focus chain XA [auth C] Focus chain YA [auth C] Focus chain ZA [auth C] Interactions & Density Focus chain AB [auth C] Focus chain BA [auth A] Focus chain BB [auth C] Focus chain CA [auth A] Focus chain DA [auth A] Focus chain EA [auth A] Focus chain FA [auth A] Focus chain GA [auth A] Focus chain HA [auth A] Focus chain IA [auth A] Focus chain JA [auth A] Focus chain KA [auth B] Focus chain LA [auth B] Focus chain MA [auth B] Focus chain NA [auth B] Focus chain OA [auth B] Focus chain PA [auth B] Focus chain QA [auth B] Focus chain RA [auth B] Focus chain SA [auth B] Focus chain TA [auth C] Focus chain UA [auth C] Focus chain VA [auth C] Focus chain WA [auth C] Focus chain XA [auth C] Focus chain YA [auth C] Focus chain ZA [auth C]