7ELX

The crystal structure of CTLA-4 and Fab

• PDB DOI: https://doi.org/10.2210/pdb7ELX/pdb

• Classification: APOPTOSIS
• Organism(s): Homo sapiens
• Expression System: Cricetulus griseus, Escherichia phage EcSzw-2
• Mutation(s): No 


• Deposited: 2021-04-12 Released: 2021-06-30 
• Deposition Author(s): Yu, X.J., Wang, L., Yu, C.F.

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Experimental Data Snapshot

• Method: X-RAY DIFFRACTION
• Resolution: 2.14 Å
• R-Value Free: 0.217 
• R-Value Work: 0.177 
• R-Value Observed: 0.178 

Starting Model: experimental

Literature

The crystal structure of CTLA-4 and Fab

Yu, X.J., Yu, C.F.

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.

Biological Assembly Evidence: gel filtration

Biological Assembly 2  

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

Biological assembly 2 assigned by authors.

Macromolecule Content

• Total Structure Weight: 181.35 kDa 
• Atom Count: 8,836 
• Modelled Residue Count: 1,077 
• Deposited Residue Count: 1,656 
• Unique protein chains: 3

Macromolecules

Entity ID: 1
Molecule	Chains	Sequence Length	Organism	Details	Image
heavy chain of Fab	A [auth H], C [auth h]	467	Homo sapiens	Mutation(s): 0

Entity ID: 2
Molecule	Chains	Sequence Length	Organism	Details	Image
light chain of Fab	B [auth L], D [auth l]	235	Homo sapiens	Mutation(s): 0

Entity ID: 3
Molecule	Chains	Sequence Length	Organism	Details	Image
Cytotoxic T-lymphocyte protein 4	E [auth c], F [auth C]	126	Homo sapiens	Mutation(s): 0  Gene Names: CTLA4, CD152
UniProt & NIH Common Fund Data Resources
Find proteins for P16410 (Homo sapiens) Explore P16410  Go to UniProtKB:  P16410
PHAROS:  P16410 GTEx:  ENSG00000163599

Experimental Data & Validation

Experimental Data

• Method: X-RAY DIFFRACTION
• Resolution: 2.14 Å
• R-Value Free: 0.217 
• R-Value Work: 0.177 
• R-Value Observed: 0.178 
• Space Group: C 2 2 2₁

Unit Cell:

Length ( Å )	Angle ( ˚ )
a = 95.923	α = 90
b = 196.921	β = 90
c = 148.389	γ = 90

Software Package:

Software Name	Purpose
HKL-2000	data reduction
HKL-2000	data scaling
PHASER	phasing
PHENIX	refinement
PDB_EXTRACT	data extraction

Structure Validation

Entry History 

Deposition Data

• Released Date: 2021-06-30 
Deposition Author(s): Yu, X.J., Wang, L., Yu, C.F.

Revision History  

• Version 1.0: 2021-06-30
  Type: Initial release
  
• Version 1.1: 2023-11-29
  Changes: Advisory, Data collection, Database references, Refinement description
• Version 1.2: 2024-11-20
  Changes: Structure summary