9WLB | pdb_00009wlb

Local refinement region of SARS-CoV-2 spike RBD in complex with antibodies S309 and CT1-1.


Experimental Data Snapshot

  • Method: ELECTRON MICROSCOPY
  • Resolution: 3.74 Å
  • Aggregation State: PARTICLE 
  • Reconstruction Method: SINGLE PARTICLE 

wwPDB Validation 3D Report Full Report

Validation slider image for 9WLB

This is version 1.1 of the entry. See complete history

Literature

Public antibody clonotypes and deep learning identify SARS-CoV-2 and HIV broadly neutralizing antibodies in immune repertoires.

Zhou, L.Yu, Z.Lin, S.Jiang, Y.Gao, J.Ma, Y.Jiang, W.Liang, S.Chen, Y.Zhang, Y.Lin, Y.Liang, M.Dai, J.Zhang, L.Xiao, Y.Li, T.Kong, Z.Liu, Q.He, S.Wu, Y.Yuan, Q.Liu, F.Zhang, J.Zheng, Q.Yu, H.Gu, Y.Li, S.Xia, N.

(2026) Cell Rep 45: 117582-117582

  • DOI: https://doi.org/10.1016/j.celrep.2026.117582
  • Primary Citation Related Structures: 
    9WLA, 9WLB

  • PubMed Abstract: 

    Broadly neutralizing antibodies (bnAbs) are essential for the development of vaccines and therapeutics against rapidly evolving pathogens like HIV and SARS-CoV-2, yet traditional discovery methods remain technically challenging and time consuming. Here, we introduce ClonoDeep, an AI-powered platform that integrates public antibody clonotypes with a sequence-based deep learning model to directly identify bnAbs from a large-scale immune repertoire, independent of antigen-specific immunization. Applied to SARS-CoV-2 repertoires, ClonoDeep identified 18 clonotype-derived antibody candidates; 83% of the candidates were neutralizing antibodies, and 8 of these antibodies demonstrated broad neutralization across variants. Structural analysis revealed that somatic hypermutations at HCDR3 His107/Gly109 are key enhancers of the binding affinity and neutralizing breadth. Extending to HIV, ClonoDeep uncovered three previously unreported bnAbs from non-HIV cohorts, indicating that rare bnAb-like precursors exist in non-HIV cohort repertoires. ClonoDeep establishes a high-throughput computational approach for mining neutralizing antibodies from antibody repertoires shaped by non-pathogen-specific immunity and provides design principles to guide vaccine strategies against genetically diverse pathogens.


  • Organizational Affiliation
    • State Key Laboratory of Vaccines for Infectious Diseases, Xiang An Biomedicine Laboratory, School of Public Health, School of Life Sciences, Xiamen University, Fujian 361102, China; National Institute of Diagnostics and Vaccine Development in Infectious Diseases, National Innovation Platform for Industry-Education Integration in Vaccine Research, Xiamen University, Fujian 361102, China. Electronic address: zhoulizhi@xmu.edu.cn.

Macromolecule Content 

  • Total Structure Weight: 87.52 kDa 
  • Atom Count: 4,569 
  • Modeled Residue Count: 643 
  • Deposited Residue Count: 795 
  • Unique protein chains: 5

Macromolecules

Find similar proteins by:|  3D Structure
Entity ID: 1
MoleculeChains  Sequence LengthOrganismDetailsImage
S309 Fab light chainA [auth B]214Homo sapiensMutation(s): 0 
Find similar proteins by:|  3D Structure
Entity ID: 2
MoleculeChains  Sequence LengthOrganismDetailsImage
S309 Fab heavy chainB [auth D]126Homo sapiensMutation(s): 0 
Find similar proteins by:|  3D Structure
Entity ID: 3
MoleculeChains  Sequence LengthOrganismDetailsImage
CT1-1 Fab heavy chainC [auth H]123Homo sapiensMutation(s): 0 
Find similar proteins by:|  3D Structure
Entity ID: 4
MoleculeChains  Sequence LengthOrganismDetailsImage
Spike protein S1D [auth R]223Severe acute respiratory syndrome coronavirus 2Mutation(s): 0 
Gene Names: S2
UniProt
Find proteins for P0DTC2 (Severe acute respiratory syndrome coronavirus 2)
Explore P0DTC2 
Go to UniProtKB:  P0DTC2
Entity Groups
Sequence Clusters30% Identity50% Identity70% Identity90% Identity95% Identity100% Identity
UniProt GroupP0DTC2
Sequence Annotations
Expand
Reference Sequence
Find similar proteins by:|  3D Structure
Entity ID: 5
MoleculeChains  Sequence LengthOrganismDetailsImage
CT1-1 Fab light chainE [auth L]109Homo sapiensMutation(s): 0 

Small Molecules

Ligands 1 Unique
IDChains Name / Formula / InChI Key2D Diagram3D Interactions
CL

Query on CL



Download:Ideal Coordinates CCD File
F [auth B]CHLORIDE ION
Cl
VEXZGXHMUGYJMC-UHFFFAOYSA-M

Experimental Data & Validation

Experimental Data

  • Method: ELECTRON MICROSCOPY
  • Resolution: 3.74 Å
  • Aggregation State: PARTICLE 
  • Reconstruction Method: SINGLE PARTICLE 
EM Software:
TaskSoftware PackageVersion
RECONSTRUCTIONcryoSPARC

Structure Validation

View Full Validation Report



Entry History 

& Funding Information

Deposition Data


Funding OrganizationLocationGrant Number
Not funded--

Revision History  (Full details and data files)

  • Version 1.0: 2026-06-03
    Type: Initial release
  • Version 1.1: 2026-07-01
    Changes: Data collection, Database references