9CHU

Cryo-EM structure of calcineurin fused beta2 adrenergic receptor in norepinephrine bound inactive state


Experimental Data Snapshot

  • Method: ELECTRON MICROSCOPY
  • Resolution: 3.49 Å
  • Aggregation State: PARTICLE 
  • Reconstruction Method: SINGLE PARTICLE 

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This is version 1.1 of the entry. See complete history


Literature

Calcineurin-fusion facilitates cryo-EM structure determination of a Family A GPCR.

Xu, J.Chen, G.Wang, H.Cao, S.Heng, J.Deupi, X.Du, Y.Kobilka, B.K.

(2024) Proc Natl Acad Sci U S A 121: e2414544121-e2414544121

  • DOI: https://doi.org/10.1073/pnas.2414544121
  • Primary Citation of Related Structures:  
    9CHU, 9CHV, 9CHX

  • PubMed Abstract: 

    Advances in singe-particle cryo-electron microscopy (cryo-EM) have made it possible to solve the structures of numerous Family A and Family B G protein-coupled receptors (GPCRs) in complex with G proteins and arrestins, as well as several Family C GPCRs. Determination of these structures has been facilitated by the presence of large extramembrane components (such as G protein, arrestin, or Venus flytrap domains) in these complexes that aid in particle alignment during the processing of the cryo-EM data. In contrast, determination of the inactive state structure of Family A GPCRs is more challenging due to the relatively small size of the seven transmembrane domain (7TM) and to the surrounding detergent micelle that, in the absence of other features, make particle alignment impossible. Here, we describe an alternative protein engineering strategy where the heterodimeric protein calcineurin is fused to a GPCR by three points of attachment, the cytoplasmic ends of TM5, TM6, and TM7. This three-point attachment provides a more rigid link with the GPCR transmembrane domain that facilitates particle alignment during data processing, allowing us to determine the structures of the β 2 adrenergic receptor (β 2 AR) in the apo, antagonist-bound, and agonist-bound states. We expect that this fusion strategy may have broad application in cryo-EM structural determination of other Family A GPCRs.


  • Organizational Affiliation

    Department of Molecular and Cellular Physiology, Stanford University School of Medicine, Stanford, CA 94305.


Macromolecules
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Entity ID: 1
MoleculeChains Sequence LengthOrganismDetailsImage
Beta-2 adrenergic receptor,Calcineurin subunit B type 1431Homo sapiensMutation(s): 0 
Gene Names: ADRB2ADRB2RB2ARPPP3R1CNA2CNB
Membrane Entity: Yes 
UniProt & NIH Common Fund Data Resources
Find proteins for P63098 (Homo sapiens)
Explore P63098 
Go to UniProtKB:  P63098
PHAROS:  P63098
GTEx:  ENSG00000221823 
Find proteins for P07550 (Homo sapiens)
Explore P07550 
Go to UniProtKB:  P07550
PHAROS:  P07550
GTEx:  ENSG00000169252 
Entity Groups  
Sequence Clusters30% Identity50% Identity70% Identity90% Identity95% Identity100% Identity
UniProt GroupsP63098P07550
Sequence Annotations
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  • Reference Sequence
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Entity ID: 2
MoleculeChains Sequence LengthOrganismDetailsImage
Protein phosphatase 3 catalytic subunit alpha370Mus musculusMutation(s): 0 
Gene Names: Ppp3caCalna
EC: 3.1.3.16
Membrane Entity: Yes 
UniProt & NIH Common Fund Data Resources
Find proteins for P63328 (Mus musculus)
Explore P63328 
Go to UniProtKB:  P63328
IMPC:  MGI:107164
Entity Groups  
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UniProt GroupP63328
Sequence Annotations
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  • Reference Sequence
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Entity ID: 3
MoleculeChains Sequence LengthOrganismDetailsImage
Peptidyl-prolyl cis-trans isomerase FKBP1A108Homo sapiensMutation(s): 0 
Gene Names: FKBP1AFKBP1FKBP12
EC: 5.2.1.8
Membrane Entity: Yes 
UniProt & NIH Common Fund Data Resources
Find proteins for P62942 (Homo sapiens)
Explore P62942 
Go to UniProtKB:  P62942
PHAROS:  P62942
GTEx:  ENSG00000088832 
Entity Groups  
Sequence Clusters30% Identity50% Identity70% Identity90% Identity95% Identity100% Identity
UniProt GroupP62942
Sequence Annotations
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  • Reference Sequence
Experimental Data & Validation

Experimental Data

  • Method: ELECTRON MICROSCOPY
  • Resolution: 3.49 Å
  • Aggregation State: PARTICLE 
  • Reconstruction Method: SINGLE PARTICLE 
EM Software:
TaskSoftware PackageVersion
MODEL REFINEMENTPHENIX1.18_3861:

Structure Validation

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Entry History & Funding Information

Deposition Data


Funding OrganizationLocationGrant Number
Not funded--

Revision History  (Full details and data files)

  • Version 1.0: 2024-11-13
    Type: Initial release
  • Version 1.1: 2024-11-27
    Changes: Data collection, Database references, Structure summary