9CTR

Best1 + GABA intermediate state 1

  • Classification: MEMBRANE PROTEIN
  • Organism(s): Homo sapiens
  • Expression System: Homo sapiens
  • Mutation(s): No 
  • Membrane Protein: Yes  PDBTM

  • Deposited: 2024-07-25 Released: 2024-09-25 
  • Deposition Author(s): Owji, A.P., Kittredge, A., Zhang, Y., Yang, T.
  • Funding Organization(s): National Institutes of Health/National Institute of General Medical Sciences (NIH/NIGMS), National Institutes of Health/National Eye Institute (NIH/NEI), Other private

Experimental Data Snapshot

  • Method: ELECTRON MICROSCOPY
  • Resolution: 2.42 Å
  • Aggregation State: PARTICLE 
  • Reconstruction Method: SINGLE PARTICLE 

Starting Model: experimental
View more details

wwPDB Validation   3D Report Full Report


This is version 1.0 of the entry. See complete history


Literature

GAD65 tunes the functions of Best1 as a GABA receptor and a neurotransmitter conducting channel.

Wang, J.Owji, A.P.Kittredge, A.Clark, Z.Zhang, Y.Yang, T.

(2024) Nat Commun 15: 8051-8051

  • DOI: https://doi.org/10.1038/s41467-024-52039-5
  • Primary Citation of Related Structures:  
    9CTQ, 9CTR, 9CTS, 9CTT

  • PubMed Abstract: 

    Bestrophin-1 (Best1) is an anion channel genetically linked to vision-threatening retinal degenerative channelopathies. Here, we identify interactions between Best1 and both isoforms of glutamic acid decarboxylases (GAD65 and GAD67), elucidate the distinctive influences of GAD65 and GAD67 on Best1's permeability to various anions/neurotransmitters, discover the functionality of Best1 as a γ-Aminobutyric acid (GABA) type A receptor, and solve the structure of GABA-bound Best1. GAD65 and GAD67 both promote Best1-mediated Cl - currents, but only GAD65 drastically enhances the permeability of Best1 to glutamate and GABA, for which GAD67 has no effect. GABA binds to Best1 on an extracellular site and stimulates Best1-mediated Cl - currents at the nano-molar concentration level. The physiological role of GAD65 as a cell type-specific binding partner and facilitator of Best1 is demonstrated in retinal pigment epithelial cells. Together, our results reveal critical regulators of Best1 and inform a network of membrane transport metabolons formed between bestrophin channels and glutamate metabolic enzymes.


  • Organizational Affiliation

    Department of Ophthalmology, Columbia University, New York, NY, USA.


Macromolecules
Find similar proteins by:  (by identity cutoff)  |  3D Structure
Entity ID: 1
MoleculeChains Sequence LengthOrganismDetailsImage
Bestrophin-1A [auth B],
B [auth E],
C [auth A],
D,
E [auth C]
584Homo sapiensMutation(s): 0 
Gene Names: BEST1VMD2
Membrane Entity: Yes 
UniProt & NIH Common Fund Data Resources
Find proteins for O76090 (Homo sapiens)
Explore O76090 
Go to UniProtKB:  O76090
PHAROS:  O76090
GTEx:  ENSG00000167995 
Entity Groups  
Sequence Clusters30% Identity50% Identity70% Identity90% Identity95% Identity100% Identity
UniProt GroupO76090
Sequence Annotations
Expand
  • Reference Sequence
Small Molecules
Ligands 2 Unique
IDChains Name / Formula / InChI Key2D Diagram3D Interactions
ABU (Subject of Investigation/LOI)
Query on ABU

Download Ideal Coordinates CCD File 
G [auth B],
H [auth B],
K [auth A],
M [auth D]
GAMMA-AMINO-BUTANOIC ACID
C4 H9 N O2
BTCSSZJGUNDROE-UHFFFAOYSA-N
CA
Query on CA

Download Ideal Coordinates CCD File 
F [auth B],
I [auth E],
J [auth A],
L [auth D],
N [auth C]
CALCIUM ION
Ca
BHPQYMZQTOCNFJ-UHFFFAOYSA-N
Experimental Data & Validation

Experimental Data

  • Method: ELECTRON MICROSCOPY
  • Resolution: 2.42 Å
  • Aggregation State: PARTICLE 
  • Reconstruction Method: SINGLE PARTICLE 
EM Software:
TaskSoftware PackageVersion
MODEL REFINEMENTPHENIX1.20.1_4487:
RECONSTRUCTIONcryoSPARC

Structure Validation

View Full Validation Report



Entry History & Funding Information

Deposition Data


Funding OrganizationLocationGrant Number
National Institutes of Health/National Institute of General Medical Sciences (NIH/NIGMS)United StatesR35GM149252
National Institutes of Health/National Institute of General Medical Sciences (NIH/NIGMS)United StatesR01GM127652
National Institutes of Health/National Eye Institute (NIH/NEI)United StatesR24EY028758
Other privateUnited StatesCU20-4313
Other privateUnited StatesCU22-1892

Revision History  (Full details and data files)

  • Version 1.0: 2024-09-25
    Type: Initial release