9NAB | pdb_00009nab

Cryo-EM structure of the alpha5beta1 integrin headpiece with OS2966 Fab

• PDB DOI: https://doi.org/10.2210/pdb9NAB/pdb
• EM Map EMD-49184: EMDB EMDataResource

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


• Deposited: 2025-02-11 Released: 2025-07-23 
• Deposition Author(s): Wang, L., Zhang, C.
• Funding Organization(s): National Institutes of Health/National Institute of General Medical Sciences (NIH/NIGMS)

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Experimental Data Snapshot

• Method: ELECTRON MICROSCOPY
• Resolution: 2.54 Å
• Aggregation State: PARTICLE 
• Reconstruction Method: SINGLE PARTICLE 

Literature

ITGB1 regulates triple-negative breast cancer development by modulating the tumor microenvironment

Song, N., Chen, S., Wang, L., Dang, J., Cao, X., Singh, S., Yang, L., Wang, J., Rosen, S.T., Wang, Y., Chen, C.D., Zhang, C., Feng, M.

To be published.

Biological Assembly 1  

Global Symmetry: Asymmetric - C1 
Global Stoichiometry: Hetero 4-mer - A1B1C1D1 

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

Biological Assembly Evidence: electron microscopy

Macromolecule Content 

• Total Structure Weight: 178.58 kDa 
• Atom Count: 8,498 
• Modeled Residue Count: 1,106 
• Deposited Residue Count: 1,636 
• Unique protein chains: 4

Macromolecules

Entity ID: 1
Molecule	Chains	Sequence Length	Organism	Details	Image
Integrin beta-1	A	498	Homo sapiens	Mutation(s): 0  Gene Names: ITGB1, FNRB, MDF2, MSK12
UniProt & NIH Common Fund Data Resources
Find proteins for P05556 (Homo sapiens) Explore P05556  Go to UniProtKB:  P05556
PHAROS:  P05556 GTEx:  ENSG00000150093

Entity ID: 2
Molecule	Chains	Sequence Length	Organism	Details	Image
Human Integrin alpha 5	B	694	Homo sapiens	Mutation(s): 0

Entity ID: 3
Molecule	Chains	Sequence Length	Organism	Details	Image
IgG heavy chain	C [auth D]	230	Mus musculus	Mutation(s): 0

Entity ID: 4
Molecule	Chains	Sequence Length	Organism	Details	Image
IgG light chain	D [auth C]	214	Mus musculus	Mutation(s): 0

Experimental Data & Validation

Experimental Data

• Method: ELECTRON MICROSCOPY
• Resolution: 2.54 Å
• Aggregation State: PARTICLE 
• Reconstruction Method: SINGLE PARTICLE 

EM Software:

Task	Software Package	Version
MODEL REFINEMENT	PHENIX	1.21.2_5419:

Structure Validation

Entry History & Funding Information

Deposition Data

• Released Date: 2025-07-23 
Deposition Author(s): Wang, L., Zhang, C.

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Funding Organization	Location	Grant Number
National Institutes of Health/National Institute of General Medical Sciences (NIH/NIGMS)	United States	5R35GM128641

Revision History  

• Version 1.0: 2025-07-23
  Type: Initial release