8ZHR | pdb_00008zhr

Cryo-EM structure of the full-length pAg-bound BTN2A1-BTN3A1-BTN3A2 complex

• PDB DOI: https://doi.org/10.2210/pdb8ZHR/pdb
• EM Map EMD-60114: EMDB EMDataResource

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


• Deposited: 2024-05-11 Released: 2025-11-26 
• Deposition Author(s): Xin, W., Huang, B., Su, Q., Zhou, Q.
• Funding Organization(s): National Natural Science Foundation of China (NSFC)

---

Experimental Data Snapshot

• Method: ELECTRON MICROSCOPY
• Resolution: 3.00 Å
• Aggregation State: PARTICLE 
• Reconstruction Method: SINGLE PARTICLE 

Literature

Phosphoantigen-Driven Dissociation of Butyrophilin Oligomers Activates gamma delta T Cells

Xin, W., Huang, B., Gao, W., Zhang, W., Hu, Y., Liu, Y., Liang, E., Shi, Y., Su, Q., Zhou, Q.

(2025) bioRxiv 

• DOI: https://doi.org/10.1101/2025.09.26.677252

Biological Assembly 1  

Global Symmetry: Asymmetric - C1 
Global Stoichiometry: Hetero 4-mer - A2B1C1 Local Symmetry: Cyclic - C2  (Explore in 3D)
Local Stoichiometry: Homo 2-mer - A2 

Local Symmetry: Cyclic - C2  (Explore in 3D)
Local Stoichiometry: Homo 2-mer - A2 

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

Biological Assembly Evidence: electron microscopy

Macromolecule Content 

• Total Structure Weight: 214.55 kDa 
• Atom Count: 14,005 
• Modeled Residue Count: 1,765 
• Deposited Residue Count: 1,905 
• Unique protein chains: 3

Macromolecules

Entity ID: 1
Molecule	Chains	Sequence Length	Organism	Details	Image
Butyrophilin subfamily 3 member A2	A [auth E]	327	Homo sapiens	Mutation(s): 0  Gene Names: BTN3A2, BT3.2, BTF3, BTF4
UniProt & NIH Common Fund Data Resources
Find proteins for P78410 (Homo sapiens) Explore P78410  Go to UniProtKB:  P78410
PHAROS:  P78410 GTEx:  ENSG00000186470

Entity ID: 2
Molecule	Chains	Sequence Length	Organism	Details	Image
Butyrophilin subfamily 2 member A1	B, D [auth A]	534	Homo sapiens	Mutation(s): 0  Gene Names: BTN2A1, BT2.1, BTF1
UniProt & NIH Common Fund Data Resources
Find proteins for Q7KYR7 (Homo sapiens) Explore Q7KYR7  Go to UniProtKB:  Q7KYR7
PHAROS:  Q7KYR7 GTEx:  ENSG00000112763

Entity ID: 3
Molecule	Chains	Sequence Length	Organism	Details	Image
Butyrophilin subfamily 3 member A1	C [auth F]	510	Homo sapiens	Mutation(s): 0  Gene Names: BTN3A1, BTF5
UniProt & NIH Common Fund Data Resources
Find proteins for O00481 (Homo sapiens) Explore O00481  Go to UniProtKB:  O00481
PHAROS:  O00481 GTEx:  ENSG00000026950

Small Molecules

Ligands 1 Unique
ID	Chains	Name / Formula / InChI Key	2D Diagram
H6P	E [auth F]	(2E)-4-hydroxy-3-methylbut-2-en-1-yl trihydrogen diphosphate C5 H12 O8 P2 MDSIZRKJVDMQOQ-GORDUTHDSA-N

Experimental Data & Validation

Experimental Data

• Method: ELECTRON MICROSCOPY
• Resolution: 3.00 Å
• Aggregation State: PARTICLE 
• Reconstruction Method: SINGLE PARTICLE 

Structure Validation

Entry History 

& Funding Information

Deposition Data

• Released Date: 2025-11-26 
Deposition Author(s): Xin, W., Huang, B., Su, Q., Zhou, Q.

---

Funding Organization	Location	Grant Number
National Natural Science Foundation of China (NSFC)	China	32100975

Revision History  

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