7RHJ

Cryo-EM structure of human rod CNGA1/B1 channel in L-cis-Diltiazem-blocked open state

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

  • Deposited: 2021-07-17 Released: 2021-11-03 
  • Deposition Author(s): Xue, J., Han, Y., Jiang, Y.
  • Funding Organization(s): National Institutes of Health/National Institute of General Medical Sciences (NIH/NIGMS), Welch Foundation, Howard Hughes Medical Institute (HHMI)

Experimental Data Snapshot

  • Method: ELECTRON MICROSCOPY
  • Resolution: 2.88 Å
  • Aggregation State: PARTICLE 
  • Reconstruction Method: SINGLE PARTICLE 

wwPDB Validation   3D Report Full Report


This is version 1.2 of the entry. See complete history


Literature

Structural mechanisms of assembly, permeation, gating, and pharmacology of native human rod CNG channel.

Xue, J.Han, Y.Zeng, W.Jiang, Y.

(2022) Neuron 110: 86-95.e5

  • DOI: https://doi.org/10.1016/j.neuron.2021.10.006
  • Primary Citation of Related Structures:  
    7RH9, 7RHG, 7RHH, 7RHI, 7RHJ, 7RHK, 7RHL

  • PubMed Abstract: 

    Mammalian cyclic nucleotide-gated (CNG) channels are nonselective cation channels activated by cGMP or cAMP and play essential roles in the signal transduction of the visual and olfactory sensory systems. CNGA1, the principal component of the CNG channel from rod photoreceptors, can by itself form a functional homotetrameric channel and has been used as the model system in the majority of rod CNG studies. However, the native rod CNG functions as a heterotetramer consisting of three A1 and one B1 subunits and exhibits different functional properties than the CNGA1 homomer. Here we present the functional analysis of human rod CNGA1/B1 heterotetramer and its cryo-EM structures in apo, cGMP-bound, cAMP-bound, and L-cis-Diltiazem-blocked states. These structures, with resolution ranging from 2.6 to 3.3 Å, elucidate the structural mechanisms underlying the 3:1 subunit stoichiometry, the asymmetrical gating upon cGMP activation, and the unique pharmacological property of the native rod CNG channel.


  • Organizational Affiliation

    Howard Hughes Medical Institute and Department of Physiology, University of Texas Southwestern Medical Center, Dallas, TX, USA; Department of Biophysics, University of Texas Southwestern Medical Center, Dallas, TX, USA.


Macromolecules
Find similar proteins by:  (by identity cutoff)  |  3D Structure
Entity ID: 1
MoleculeChains Sequence LengthOrganismDetailsImage
cGMP-gated cation channel alpha-1
A, C, D
560Homo sapiensMutation(s): 0 
Gene Names: CNGA1CNCGCNCG1
Membrane Entity: Yes 
UniProt & NIH Common Fund Data Resources
Find proteins for P29973 (Homo sapiens)
Explore P29973 
Go to UniProtKB:  P29973
PHAROS:  P29973
GTEx:  ENSG00000198515 
Entity Groups  
Sequence Clusters30% Identity50% Identity70% Identity90% Identity95% Identity100% Identity
UniProt GroupP29973
Sequence Annotations
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  • Reference Sequence
Find similar proteins by:  (by identity cutoff)  |  3D Structure
Entity ID: 2
MoleculeChains Sequence LengthOrganismDetailsImage
Cyclic nucleotide-gated cation channel beta-1810Homo sapiensMutation(s): 0 
Gene Names: CNGB1CNCG2CNCG3LCNCG4RCNC2
Membrane Entity: Yes 
UniProt & NIH Common Fund Data Resources
Find proteins for Q14028 (Homo sapiens)
Explore Q14028 
Go to UniProtKB:  Q14028
PHAROS:  Q14028
GTEx:  ENSG00000070729 
Entity Groups  
Sequence Clusters30% Identity50% Identity70% Identity90% Identity95% Identity100% Identity
UniProt GroupQ14028
Sequence Annotations
Expand
  • Reference Sequence
Experimental Data & Validation

Experimental Data

  • Method: ELECTRON MICROSCOPY
  • Resolution: 2.88 Å
  • Aggregation State: PARTICLE 
  • Reconstruction Method: SINGLE PARTICLE 

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 StatesR35GM140892
Welch FoundationUnited StatesI-1578
Howard Hughes Medical Institute (HHMI)United States--

Revision History  (Full details and data files)

  • Version 1.0: 2021-11-03
    Type: Initial release
  • Version 1.1: 2022-01-19
    Changes: Database references
  • Version 1.2: 2024-06-05
    Changes: Data collection