6U1N

GPCR-Beta arrestin structure in lipid bilayer


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 the M2 muscarinic receptor-beta-arrestin complex in a lipid nanodisc.

Staus, D.P.Hu, H.Robertson, M.J.Kleinhenz, A.L.W.Wingler, L.M.Capel, W.D.Latorraca, N.R.Lefkowitz, R.J.Skiniotis, G.

(2020) Nature 579: 297-302

  • DOI: 10.1038/s41586-020-1954-0
  • Primary Citation of Related Structures:  
    6U1N

  • PubMed Abstract: 
  • After activation by an agonist, G-protein-coupled receptors (GPCRs) recruit β-arrestin, which desensitizes heterotrimeric G-protein signalling and promotes receptor endocytosis 1 . Additionally, β-arrestin directly regulates many cell signalling pathways that can induce cellular responses distinct from that of G proteins 2 ...

    After activation by an agonist, G-protein-coupled receptors (GPCRs) recruit β-arrestin, which desensitizes heterotrimeric G-protein signalling and promotes receptor endocytosis 1 . Additionally, β-arrestin directly regulates many cell signalling pathways that can induce cellular responses distinct from that of G proteins 2 . In contrast to G proteins, for which there are many high-resolution structures in complex with GPCRs, the molecular mechanisms underlying the interaction of β-arrestin with GPCRs are much less understood. Here we present a cryo-electron microscopy structure of β-arrestin 1 (βarr1) in complex with M2 muscarinic receptor (M2R) reconstituted in lipid nanodiscs. The M2R-βarr1 complex displays a multimodal network of flexible interactions, including binding of the N domain of βarr1 to phosphorylated receptor residues and insertion of the finger loop of βarr1 into the M2R seven-transmembrane bundle, which adopts a conformation similar to that in the M2R-heterotrimeric G o protein complex 3 . Moreover, the cryo-electron microscopy map reveals that the C-edge of βarr1 engages the lipid bilayer. Through atomistic simulations and biophysical, biochemical and cellular assays, we show that the C-edge is critical for stable complex formation, βarr1 recruitment, receptor internalization, and desensitization of G-protein activation. Taken together, these data suggest that the cooperative interactions of β-arrestin with both the receptor and the phospholipid bilayer contribute to its functional versatility.


    Organizational Affiliation

    Department of Structural Biology, Stanford University School of Medicine, Stanford, CA, USA. yiorgo@stanford.edu.



Macromolecules
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Entity ID: 1
MoleculeChainsSequence LengthOrganismDetailsImage
Muscarinic acetylcholine receptor M2, Vasopressin V2 receptor chimeraA [auth R]509Homo sapiensMutation(s): 0 
Gene Names: CHRM2AVPR2ADHRDIRDIR3V2R
Membrane Entity: Yes 
UniProt & NIH Common Fund Data Resources
Find proteins for P08172 (Homo sapiens)
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PHAROS:  P08172
Find proteins for P30518 (Homo sapiens)
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Go to UniProtKB:  P30518
PHAROS:  P30518
Entity Groups  
Sequence Clusters30% Identity50% Identity70% Identity90% Identity95% Identity100% Identity
UniProt GroupsP08172P30518
Protein Feature View
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  • Reference Sequence
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Entity ID: 2
MoleculeChainsSequence LengthOrganismDetailsImage
Beta-arrestin-1B [auth C]401Rattus norvegicusMutation(s): 7 
Gene Names: Arrb1
Membrane Entity: Yes 
UniProt
Find proteins for P29066 (Rattus norvegicus)
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UniProt GroupP29066
Protein Feature View
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Entity ID: 3
MoleculeChainsSequence LengthOrganismDetailsImage
Fab30 heavy chainC [auth H]237Homo sapiensMutation(s): 0 
Gene Names: HEL-214
Membrane Entity: Yes 
UniProt
Find proteins for V9HW68 (Homo sapiens)
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UniProt GroupV9HW68
Protein Feature View
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Entity ID: 4
MoleculeChainsSequence LengthOrganismDetailsImage
Fab30 light chainD [auth L]215Homo sapiensMutation(s): 1 
Membrane Entity: Yes 
UniProt
Find proteins for Q7Z3Y4 (Homo sapiens)
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UniProt GroupQ7Z3Y4
Protein Feature View
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  • Reference Sequence
Small Molecules
Ligands 1 Unique
IDChainsName / Formula / InChI Key2D Diagram3D Interactions
2CU
Query on 2CU

Download Ideal Coordinates CCD File 
E [auth R]3-amino-5-chloro-N-cyclopropyl-4-methyl-6-[2-(4-methylpiperazin-1-yl)-2-oxoethoxy]thieno[2,3-b]pyridine-2-carboxamide
C19 H24 Cl N5 O3 S
TYTGOXSAAQWLPJ-UHFFFAOYSA-N
 Ligand Interaction
Modified Residues  2 Unique
IDChainsTypeFormula2D DiagramParent
SEP
Query on SEP
A [auth R]L-PEPTIDE LINKINGC3 H8 N O6 PSER
TPO
Query on TPO
A [auth R]L-PEPTIDE LINKINGC4 H10 N O6 PTHR
Binding Affinity Annotations 
IDSourceBinding Affinity
2CU BindingDB:  6U1N Ki: min: 3548, max: 9333 (nM) from 5 assay(s)
IC50: 3.16e+4 (nM) from 1 assay(s)
Experimental Data & Validation

Experimental Data

  • Method: ELECTRON MICROSCOPY
  • Resolution: 4.00 Å
  • Aggregation State: PARTICLE 
  • Reconstruction Method: SINGLE PARTICLE 

Structure Validation

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Entry History & Funding Information

Deposition Data


Funding OrganizationLocationGrant Number
National Institutes of Health/National Heart, Lung, and Blood Institute (NIH/NHLBI)United StatesHL16037
National Institutes of Health/National Institute of Neurological Disorders and Stroke (NIH/NINDS)United StatesNS092695

Revision History  (Full details and data files)

  • Version 1.0: 2020-02-26
    Type: Initial release
  • Version 1.1: 2020-03-04
    Changes: Database references
  • Version 1.2: 2020-03-25
    Changes: Database references