8VTD | pdb_00008vtd

Co-structure of the Fab of the anti-TIGIT Vibostolimab antibody with its antigen

• PDB DOI: https://doi.org/10.2210/pdb8VTD/pdb

• Classification: IMMUNE SYSTEM
• Organism(s): Mus musculus, Homo sapiens
• Expression System: Homo sapiens, Escherichia coli
• Mutation(s): No 


• Deposited: 2024-01-26 Released: 2025-07-02 
• Deposition Author(s): Fischmann, T.
• Funding Organization(s): Other private

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Experimental Data Snapshot

• Method: X-RAY DIFFRACTION
• Resolution: 1.23 Å
• R-Value Free: 
  0.204 (Depositor), 0.195 (DCC) 
• R-Value Work: 
  0.185 (Depositor), 0.177 (DCC) 
• R-Value Observed: 
  0.186 (Depositor) 

Starting Model: experimental

Literature

Pharmacological and structural characterization of vibostolimab, a novel anti-human TIGIT blocking antibody for cancer immunotherapy

Fischmann, T.O., Malashock, D., Wang, H., Grein, J., Bahmanjah, S., Ban, D., Chien, E., Hsieh, M., Mayhood, T., Yuan, J., Beaumont, M., Baker, J., McCoy, M.A., Wilson, D., Williams, S.M.G., Blumenschein, W., Fayadat-Dilman, L., Seghezzi, W., Keenan, T., Han, J.-H.

To be published.

Biological Assembly 1  

Global Symmetry: Asymmetric - C1 
Global Stoichiometry: Hetero 3-mer - A1B1C1 Pseudo Symmetry: Asymmetric - C1 
Pseudo Stoichiometry: Hetero 3-mer - A2B1 

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

Macromolecule Content 

• Total Structure Weight: 60.68 kDa 
• Atom Count: 4,753 
• Modeled Residue Count: 540 
• Deposited Residue Count: 557 
• Unique protein chains: 3

Macromolecules

Entity ID: 1
Molecule	Chains	Sequence Length	Organism	Details	Image
Vibostolimab Fab Light chain	A	214	Mus musculus	Mutation(s): 0

Entity ID: 2
Molecule	Chains	Sequence Length	Organism	Details	Image
Vibostolimab Fab Heavy chain	B	221	Homo sapiens	Mutation(s): 0

Entity ID: 3
Molecule	Chains	Sequence Length	Organism	Details	Image
T-cell immunoreceptor with Ig and ITIM domains	C	122	Homo sapiens	Mutation(s): 0  Gene Names: TIGIT, VSIG9, VSTM3
UniProt & NIH Common Fund Data Resources
Find proteins for Q495A1 (Homo sapiens) Explore Q495A1  Go to UniProtKB:  Q495A1
PHAROS:  Q495A1 GTEx:  ENSG00000181847

Small Molecules

Ligands 1 Unique
ID	Chains	Name / Formula / InChI Key	2D Diagram
GOL	D [auth A], E [auth A]	GLYCEROL C3 H8 O3 PEDCQBHIVMGVHV-UHFFFAOYSA-N

Experimental Data & Validation

Experimental Data

• Method: X-RAY DIFFRACTION
• Resolution: 1.23 Å
• R-Value Free:  0.204 (Depositor), 0.195 (DCC) 
• R-Value Work:  0.185 (Depositor), 0.177 (DCC) 
• R-Value Observed: 0.186 (Depositor) 

Diffraction Data: https://doi.org/10.18430/M38VTD

Space Group: P 1 2₁ 1

Unit Cell:

Length ( Å )	Angle ( ˚ )
a = 41.775	α = 90
b = 105.996	β = 104.4
c = 71.758	γ = 90

Software Package:

Software Name	Purpose
BUSTER	refinement
Aimless	data scaling
XDS	data reduction
PHASER	phasing

Structure Validation

Entry History & Funding Information

Deposition Data

• Released Date: 2025-07-02 
Deposition Author(s): Fischmann, T.

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Funding Organization	Location	Grant Number
Other private	United States	--

Revision History  

• Version 1.0: 2025-07-02
  Type: Initial release