6K42

cryo-EM structure of alpha2BAR-Gi1 complex


Experimental Data Snapshot

  • Method: ELECTRON MICROSCOPY
  • Resolution: 4.10 Å
  • Aggregation State: 3D ARRAY 
  • Reconstruction Method: SINGLE PARTICLE 

wwPDB Validation   3D Report Full Report


This is version 1.2 of the entry. See complete history


Literature

Activation of the alpha2Badrenoceptor by the sedative sympatholytic dexmedetomidine.

Yuan, D.Liu, Z.Kaindl, J.Maeda, S.Zhao, J.Sun, X.Xu, J.Gmeiner, P.Wang, H.W.Kobilka, B.K.

(2020) Nat Chem Biol 16: 507-512

  • DOI: 10.1038/s41589-020-0492-2
  • Primary Citation of Related Structures:  
    6K42, 6K41

  • PubMed Abstract: 
  • The α 2 adrenergic receptors (α 2 ARs) are G protein-coupled receptors (GPCRs) that respond to adrenaline and noradrenaline and couple to the Gi/o family of G proteins. α 2 ARs play important roles in regulating the sympathetic nervous system ...

    The α 2 adrenergic receptors (α 2 ARs) are G protein-coupled receptors (GPCRs) that respond to adrenaline and noradrenaline and couple to the Gi/o family of G proteins. α 2 ARs play important roles in regulating the sympathetic nervous system. Dexmedetomidine is a highly selective α 2 AR agonist used in post-operative patients as an anxiety-reducing, sedative medicine that decreases the requirement for opioids. As is typical for selective αAR agonists, dexmedetomidine consists of an imidazole ring and a substituted benzene moiety lacking polar groups, which is in contrast to βAR-selective agonists, which share an ethanolamine group and an aromatic system with polar, hydrogen-bonding substituents. To better understand the structural basis for the selectivity and efficacy of adrenergic agonists, we determined the structure of the α 2B AR in complex with dexmedetomidine and Go at a resolution of 2.9 Å by single-particle cryo-EM. The structure reveals the mechanism of α 2 AR-selective activation and provides insights into Gi/o coupling specificity.


    Organizational Affiliation

    ConfometRx, Santa Clara, CA, USA. kobilka@stanford.edu.



Macromolecules
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Entity ID: 1
MoleculeChainsSequence LengthOrganismDetailsImage
Guanine nucleotide-binding protein G(i) subunit alpha-1A354Bos taurusMutation(s): 0 
Gene Names: GNAI1
Membrane Entity: Yes 
UniProt
Find proteins for P63097 (Bos taurus)
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Go to UniProtKB:  P63097
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  • Reference Sequence
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Entity ID: 2
MoleculeChainsSequence LengthOrganismDetailsImage
Guanine nucleotide-binding protein G(I)/G(S)/G(T) subunit beta-1B350Mus musculusMutation(s): 0 
Gene Names: Gnb1
UniProt & NIH Common Fund Data Resources
Find proteins for P62874 (Mus musculus)
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Go to UniProtKB:  P62874
IMPC:  MGI:95781
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Entity ID: 3
MoleculeChainsSequence LengthOrganismDetailsImage
Guanine nucleotide-binding protein G(I)/G(S)/G(O) subunit gamma-2C [auth G]71Homo sapiensMutation(s): 0 
Gene Names: GNG2
Membrane Entity: Yes 
UniProt & NIH Common Fund Data Resources
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PHAROS:  P59768
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  • Reference Sequence
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Entity ID: 4
MoleculeChainsSequence LengthOrganismDetailsImage
Alpha-2A adrenergic receptor,Endolysin,Alpha-2B adrenergic receptor,Alpha-2B adrenergic receptorD [auth R]512Homo sapiensEnterobacteria phage RB59Mutation(s): 0 
Gene Names: ADRA2AADRA2RADRAReRB59_126ADRA2BADRA2L1ADRA2RL1
EC: 3.2.1.17
Membrane Entity: Yes 
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Find proteins for P08913 (Homo sapiens)
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PHAROS:  P08913
Find proteins for P18089 (Homo sapiens)
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PHAROS:  P18089
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Entity ID: 5
MoleculeChainsSequence LengthOrganismDetailsImage
scFvE [auth H]307Mus musculusMutation(s): 0 
Protein Feature View
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  • Reference Sequence
Small Molecules
Ligands 1 Unique
IDChainsName / Formula / InChI Key2D Diagram3D Interactions
CZX
Query on CZX

Download Ideal Coordinates CCD File 
F [auth R]4-[(1~{S})-1-(2,3-dimethylphenyl)ethyl]-1~{H}-imidazole
C13 H16 N2
CUHVIMMYOGQXCV-NSHDSACASA-N
 Ligand Interaction
Experimental Data & Validation

Experimental Data

  • Method: ELECTRON MICROSCOPY
  • Resolution: 4.10 Å
  • Aggregation State: 3D ARRAY 
  • Reconstruction Method: SINGLE PARTICLE 

Structure Validation

View Full Validation Report



Entry History 

Deposition Data

Revision History  (Full details and data files)

  • Version 1.0: 2020-04-15
    Type: Initial release
  • Version 1.1: 2020-05-06
    Changes: Database references
  • Version 1.2: 2020-05-13
    Changes: Structure summary