9IA4 | pdb_00009ia4

Bc8.108 Fab

• PDB DOI: https://doi.org/10.2210/pdb9IA4/pdb

• Classification: IMMUNE SYSTEM
• Organism(s): Homo sapiens
• Expression System: Homo sapiens
• Mutation(s): No 


• Deposited: 2025-02-07 Released: 2025-11-26 
• Deposition Author(s): Mechaly, A.E., Haouz, A., Beretta, M., Caillet-Saguy, C., Mouquet, H.
• Funding Organization(s): Pasteur Institute

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Experimental Data Snapshot

• Method: X-RAY DIFFRACTION
• Resolution: 2.36 Å
• R-Value Free: 
  0.280 (Depositor), 0.280 (DCC) 
• R-Value Work: 
  0.218 (Depositor), 0.218 (DCC) 
• R-Value Observed: 
  0.221 (Depositor) 

Starting Model: in silico

Literature

In vivo efficacy of human anti-preS2 HBV neutralizing antibodies

Beretta, M., Haouz, A., Mechaly, A.E., Caillet-Saguy, C., Planchais, C., Szerman, N., Aronthippaitoon, Y., Ungeheuer, M.-N., Pol, S., Gaudy-graffin, C., Sureau, C., Bourgine, M., Mouquet, H.

To be published.

Biological Assembly 1  

Global Symmetry: Asymmetric - C1 
Global Stoichiometry: Hetero 2-mer - A1B1 Pseudo Symmetry: Cyclic - C2  (Explore in 3D)
Pseudo Stoichiometry: Homo 2-mer - A2 

Biological assembly 1 assigned by authors and generated by PISA (software)

Macromolecule Content 

• Total Structure Weight: 47.62 kDa 
• Atom Count: 3,367 
• Modeled Residue Count: 434 
• Deposited Residue Count: 443 
• Unique protein chains: 2

Macromolecules

Entity ID: 1
Molecule	Chains	Sequence Length	Organism	Details	Image
Heavy chain	A	215	Homo sapiens	Mutation(s): 0

Entity ID: 2
Molecule	Chains	Sequence Length	Organism	Details	Image
Light chain	B	228	Homo sapiens	Mutation(s): 0

Experimental Data & Validation

Experimental Data

• Method: X-RAY DIFFRACTION
• Resolution: 2.36 Å
• R-Value Free:  0.280 (Depositor), 0.280 (DCC) 
• R-Value Work:  0.218 (Depositor), 0.218 (DCC) 
• R-Value Observed: 0.221 (Depositor) 

Space Group: C 2 2 2₁

Unit Cell:

Length ( Å )	Angle ( ˚ )
a = 94.38	α = 90
b = 146.16	β = 90
c = 84.72	γ = 90

Software Package:

Software Name	Purpose
PHENIX	refinement
autoPROC	data reduction
Aimless	data scaling
PHASER	phasing

Structure Validation

Entry History 

& Funding Information

Deposition Data

• Released Date: 2025-11-26 
Deposition Author(s): Mechaly, A.E., Haouz, A., Beretta, M., Caillet-Saguy, C., Mouquet, H.

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Funding Organization	Location	Grant Number
Pasteur Institute	France	--

Revision History  

• Version 1.0: 2025-11-26
  Type: Initial release