9JR0 | pdb_00009jr0

GABA-DGABAB-Gi-complex

• PDB DOI: https://doi.org/10.2210/pdb9JR0/pdb
• EM Map EMD-61745: EMDB EMDataResource

• Classification: MEMBRANE PROTEIN
• Organism(s): Drosophila melanogaster, Homo sapiens
• Expression System: Homo sapiens, Trichoplusia ni
• Mutation(s): No 


• Deposited: 2024-09-28 Released: 2025-10-22 
• Deposition Author(s): shen, C.S., liu, J.F.
• Funding Organization(s): National Natural Science Foundation of China (NSFC)

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Experimental Data Snapshot

• Method: ELECTRON MICROSCOPY
• Resolution: 3.06 Å
• Aggregation State: 3D ARRAY 
• Reconstruction Method: SINGLE PARTICLE 

Literature

Structural basis of GABAB receptor activation during evolution

shen, C.S., liu, J.F.

To be published.

Biological Assembly 1  

Global Symmetry: Asymmetric - C1 
Global Stoichiometry: Hetero 5-mer - A1B1C1D1E1 Pseudo Symmetry: Asymmetric - C1 
Pseudo Stoichiometry: Hetero 5-mer - A2B1C1D1 

Biological assembly 1 assigned by authors.

Biological Assembly Evidence: electron microscopy

Macromolecule Content 

• Total Structure Weight: 263.82 kDa 
• Atom Count: 14,682 
• Modeled Residue Count: 2,030 
• Deposited Residue Count: 2,330 
• Unique protein chains: 5

Macromolecules

Entity ID: 1
Molecule	Chains	Sequence Length	Organism	Details	Image
Metabotropic GABA-B receptor subtype 1	A	780	Drosophila melanogaster	Mutation(s): 0  Gene Names: GABA-B-R1, CG15274
UniProt
Find proteins for Q9BML7 (Drosophila melanogaster) Explore Q9BML7  Go to UniProtKB:  Q9BML7

Entity ID: 2
Molecule	Chains	Sequence Length	Organism	Details	Image
Gamma-aminobutyric acid type B receptor subunit 2	B	767	Drosophila melanogaster	Mutation(s): 0  Gene Names: GABA-B-R2, CG6706
UniProt
Find proteins for Q9BML6 (Drosophila melanogaster) Explore Q9BML6  Go to UniProtKB:  Q9BML6

Entity ID: 3
Molecule	Chains	Sequence Length	Organism	Details	Image
Guanine nucleotide-binding protein G(i) subunit alpha-1	C	354	Homo sapiens	Mutation(s): 0  Gene Names: GNAI1 EC: 3.6.5
UniProt & NIH Common Fund Data Resources
Find proteins for P63096 (Homo sapiens) Explore P63096  Go to UniProtKB:  P63096
PHAROS:  P63096 GTEx:  ENSG00000127955

Entity ID: 4
Molecule	Chains	Sequence Length	Organism	Details	Image
Guanine nucleotide-binding protein G(I)/G(S)/G(T) subunit beta-1	D	358	Homo sapiens	Mutation(s): 0  Gene Names: GNB1
UniProt & NIH Common Fund Data Resources
Find proteins for P62873 (Homo sapiens) Explore P62873  Go to UniProtKB:  P62873
PHAROS:  P62873 GTEx:  ENSG00000078369

Entity ID: 5
Molecule	Chains	Sequence Length	Organism	Details	Image
Guanine nucleotide-binding protein G(I)/G(S)/G(O) subunit gamma-2	E	71	Homo sapiens	Mutation(s): 0  Gene Names: GNG2
UniProt & NIH Common Fund Data Resources
Find proteins for P59768 (Homo sapiens) Explore P59768  Go to UniProtKB:  P59768
PHAROS:  P59768 GTEx:  ENSG00000186469

Small Molecules

Ligands 1 Unique
ID	Chains	Name / Formula / InChI Key	2D Diagram
ABU (Subject of Investigation/LOI)	F [auth A]	GAMMA-AMINO-BUTANOIC ACID C4 H9 N O2 BTCSSZJGUNDROE-UHFFFAOYSA-N

Experimental Data & Validation

Experimental Data

• Method: ELECTRON MICROSCOPY
• Resolution: 3.06 Å
• Aggregation State: 3D ARRAY 
• Reconstruction Method: SINGLE PARTICLE 

EM Software:

Task	Software Package	Version
RECONSTRUCTION	cryoSPARC	4.7.0

Structure Validation

Entry History & Funding Information

Deposition Data

• Released Date: 2025-10-22 
Deposition Author(s): shen, C.S., liu, J.F.

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

Revision History  

• Version 1.0: 2025-10-22
  Type: Initial release