6NI2

Stabilized beta-arrestin 1-V2T subcomplex of a GPCR-G protein-beta-arrestin mega-complex

Experimental Data Snapshot

  • Method: ELECTRON MICROSCOPY
  • Resolution: 4.00 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

Structure of an endosomal signaling GPCR-G protein-beta-arrestin megacomplex.

Nguyen, A.H., Thomsen, A.R.B., Cahill 3rd, T.J., Huang, R., Huang, L.Y., Marcink, T., Clarke, O.B., Heissel, S., Masoudi, A., Ben-Hail, D., Samaan, F., Dandey, V.P., Tan, Y.Z., Hong, C., Mahoney, J.P., Triest, S., Little 4th, J., Chen, X., Sunahara, R., Steyaert, J., Molina, H., Yu, Z., des Georges, A., Lefkowitz, R.J.

(2019) Nat Struct Mol Biol 26: 1123-1131

  • DOI: 10.1038/s41594-019-0330-y
  • Primary Citation of Related Structures:  
    6NI2, 6NI3

  • PubMed Abstract: 

    • Classically, G-protein-coupled receptors (GPCRs) are thought to activate G protein from the plasma membrane and are subsequently desensitized by β-arrestin (β-arr). However, some GPCRs continue to signal through G protein from internalized compartments, mediated by a GPCR-G protein-β-arr 'megaplex' ...

    Classically, G-protein-coupled receptors (GPCRs) are thought to activate G protein from the plasma membrane and are subsequently desensitized by β-arrestin (β-arr). However, some GPCRs continue to signal through G protein from internalized compartments, mediated by a GPCR-G protein-β-arr 'megaplex'. Nevertheless, the molecular architecture of the megaplex remains unknown. Here, we present its cryo-electron microscopy structure, which shows simultaneous engagement of human G protein and bovine β-arr to the core and phosphorylated tail, respectively, of a single active human chimeric β 2 -adrenergic receptor with the C-terminal tail of the arginine vasopressin type 2 receptor (β 2 V 2 R). All three components adopt their canonical active conformations, suggesting that a single megaplex GPCR is capable of simultaneously activating G protein and β-arr. Our findings provide a structural basis for GPCR-mediated sustained internalized G protein signaling.

    Organizational Affiliation: 

    Howard Hughes Medical Institute, Duke University Medical Center, Durham, NC, USA. lefko001@receptor-biol.duke.edu.



Macromolecules
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Entity ID: 1
MoleculeChainsSequence LengthOrganismDetailsImage
Nanobody 32A124Lama glamaMutation(s): 0 
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Protein Feature View
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Entity ID: 2
MoleculeChainsSequence LengthOrganismDetailsImage
Beta-arrestin-1B393Bos taurusMutation(s): 0 
Gene Names: ARRB1
Membrane Entity: Yes 
UniProt
Find proteins for P17870 (Bos taurus)
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Go to UniProtKB:  P17870
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UniProt GroupP17870
Protein Feature View
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Entity ID: 3
MoleculeChainsSequence LengthOrganismDetailsImage
Fab30 Heavy ChainC [auth H]237synthetic constructMutation(s): 0 
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Entity ID: 4
MoleculeChainsSequence LengthOrganismDetailsImage
Fab30 Light ChainD [auth L]215synthetic constructMutation(s): 0 
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Entity ID: 5
MoleculeChainsSequence LengthOrganismDetailsImage
Vasopressin V2 receptorE [auth V]26Homo sapiensMutation(s): 0 
Gene Names: AVPR2, ADHR, DIR, DIR3, V2R
Membrane Entity: Yes 
UniProt & NIH Common Fund Data Resources
Find proteins for P30518 (Homo sapiens)
Explore P30518 
Go to UniProtKB:  P30518
PHAROS:  P30518
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UniProt GroupP30518
Protein Feature View
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Small Molecules
Modified Residues  2 Unique
IDChainsTypeFormula2D DiagramParent
SEP
Query on SEP		E [auth V]L-PEPTIDE LINKINGC3 H8 N O6 PSER
TPO
Query on TPO		E [auth V]L-PEPTIDE LINKINGC4 H10 N O6 PTHR
Experimental Data & Validation

Experimental Data

  • Method: ELECTRON MICROSCOPY
  • Resolution: 4.00 Å
  • Aggregation State: PARTICLE 
  • Reconstruction Method: SINGLE PARTICLE 
EM Software:
TaskSoftware PackageVersion
RECONSTRUCTIONcryoSPARC

Structure Validation

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Entry History & Funding Information

Deposition Data

Funding OrganizationLocationGrant Number
Howard Hughes Medical Institute (HHMI)United States--
National Institutes of Health/National Heart, Lung, and Blood Institute (NIH/NHLBI)United States2R01-HL016037-47

Revision History  (Full details and data files)

  • Version 1.0: 2019-11-20
    Type: Initial release
  • Version 1.1: 2019-12-04
    Changes: Database references
  • Version 1.2: 2019-12-18
    Changes: Database references