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- PDB-8jpd: Focused refinement structure of GRK2 in NTSR1-GRK2-Galpha(q) complexes -

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Basic information

Entry
Database: PDB / ID: 8jpd
TitleFocused refinement structure of GRK2 in NTSR1-GRK2-Galpha(q) complexes
ComponentsBeta-adrenergic receptor kinase 1
KeywordsSIGNALING PROTEIN / Biased signaling
Function / homology
Function and homology information


Calmodulin induced events / beta-adrenergic-receptor kinase / negative regulation of the force of heart contraction by chemical signal / negative regulation of relaxation of smooth muscle / Activation of SMO / beta-adrenergic receptor kinase activity / G protein-coupled receptor kinase activity / Edg-2 lysophosphatidic acid receptor binding / alpha-2A adrenergic receptor binding / negative regulation of striated muscle contraction ...Calmodulin induced events / beta-adrenergic-receptor kinase / negative regulation of the force of heart contraction by chemical signal / negative regulation of relaxation of smooth muscle / Activation of SMO / beta-adrenergic receptor kinase activity / G protein-coupled receptor kinase activity / Edg-2 lysophosphatidic acid receptor binding / alpha-2A adrenergic receptor binding / negative regulation of striated muscle contraction / desensitization of G protein-coupled receptor signaling pathway / Cargo recognition for clathrin-mediated endocytosis / positive regulation of protein localization to cilium / regulation of the force of heart contraction / G protein-coupled receptor internalization / positive regulation of smoothened signaling pathway / G alpha (s) signalling events / G alpha (q) signalling events / regulation of signal transduction / cardiac muscle contraction / cell projection / G protein-coupled receptor binding / intracellular protein transport / G protein-coupled acetylcholine receptor signaling pathway / presynapse / peptidyl-serine phosphorylation / postsynapse / protein kinase activity / G protein-coupled receptor signaling pathway / protein phosphorylation / ATP binding / membrane / plasma membrane / cytosol / cytoplasm
Similarity search - Function
GPCR kinase / Regulator of G protein signaling domain / RGS domain / RGS domain profile. / Regulator of G protein signalling domain / RGS, subdomain 2 / RGS domain superfamily / Extension to Ser/Thr-type protein kinases / AGC-kinase, C-terminal / AGC-kinase C-terminal domain profile. ...GPCR kinase / Regulator of G protein signaling domain / RGS domain / RGS domain profile. / Regulator of G protein signalling domain / RGS, subdomain 2 / RGS domain superfamily / Extension to Ser/Thr-type protein kinases / AGC-kinase, C-terminal / AGC-kinase C-terminal domain profile. / PH domain / PH domain profile. / Pleckstrin homology domain. / Pleckstrin homology domain / PH-like domain superfamily / Serine/threonine-protein kinase, active site / Serine/Threonine protein kinases active-site signature. / Protein kinase domain / Serine/Threonine protein kinases, catalytic domain / Protein kinase, ATP binding site / Protein kinases ATP-binding region signature. / Protein kinase domain profile. / Protein kinase domain / Protein kinase-like domain superfamily
Similarity search - Domain/homology
STAUROSPORINE / Beta-adrenergic receptor kinase 1
Similarity search - Component
Biological speciesBos taurus (cattle)
MethodELECTRON MICROSCOPY / single particle reconstruction / cryo EM / Resolution: 2.81 Å
AuthorsDuan, J. / Liu, H. / Zhao, F. / Yuan, Q. / Ji, Y. / Xu, H.E.
Funding support China, 1items
OrganizationGrant numberCountry
National Natural Science Foundation of China (NSFC) China
CitationJournal: Nature / Year: 2023
Title: GPCR activation and GRK2 assembly by a biased intracellular agonist.
Authors: Jia Duan / Heng Liu / Fenghui Zhao / Qingning Yuan / Yujie Ji / Xiaoqing Cai / Xinheng He / Xinzhu Li / Junrui Li / Kai Wu / Tianyu Gao / Shengnan Zhu / Shi Lin / Ming-Wei Wang / Xi Cheng / ...Authors: Jia Duan / Heng Liu / Fenghui Zhao / Qingning Yuan / Yujie Ji / Xiaoqing Cai / Xinheng He / Xinzhu Li / Junrui Li / Kai Wu / Tianyu Gao / Shengnan Zhu / Shi Lin / Ming-Wei Wang / Xi Cheng / Wanchao Yin / Yi Jiang / Dehua Yang / H Eric Xu /
Abstract: Phosphorylation of G-protein-coupled receptors (GPCRs) by GPCR kinases (GRKs) desensitizes G-protein signalling and promotes arrestin signalling, which is also modulated by biased ligands. The ...Phosphorylation of G-protein-coupled receptors (GPCRs) by GPCR kinases (GRKs) desensitizes G-protein signalling and promotes arrestin signalling, which is also modulated by biased ligands. The molecular assembly of GRKs on GPCRs and the basis of GRK-mediated biased signalling remain largely unknown owing to the weak GPCR-GRK interactions. Here we report the complex structure of neurotensin receptor 1 (NTSR1) bound to GRK2, Gα and the arrestin-biased ligand SBI-553. The density map reveals the arrangement of the intact GRK2 with the receptor, with the N-terminal helix of GRK2 docking into the open cytoplasmic pocket formed by the outward movement of the receptor transmembrane helix 6, analogous to the binding of the G protein to the receptor. SBI-553 binds at the interface between GRK2 and NTSR1 to enhance GRK2 binding. The binding mode of SBI-553 is compatible with arrestin binding but clashes with the binding of Gα protein, thus providing a mechanism for its arrestin-biased signalling capability. In sum, our structure provides a rational model for understanding the details of GPCR-GRK interactions and GRK2-mediated biased signalling.
History
DepositionJun 11, 2023Deposition site: PDBJ / Processing site: PDBJ
Revision 1.0Aug 9, 2023Provider: repository / Type: Initial release
Revision 1.1Aug 16, 2023Group: Data collection / Database references
Category: chem_comp_atom / chem_comp_bond ...chem_comp_atom / chem_comp_bond / citation / citation_author
Item: _citation.pdbx_database_id_PubMed / _citation_author.identifier_ORCID
Revision 1.2Aug 30, 2023Group: Database references / Category: citation / citation_author
Item: _citation.journal_volume / _citation.page_first ..._citation.journal_volume / _citation.page_first / _citation.page_last / _citation_author.identifier_ORCID

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Structure visualization

Structure viewerMolecule:
MolmilJmol/JSmol

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Assembly

Deposited unit
G: Beta-adrenergic receptor kinase 1
hetero molecules


Theoretical massNumber of molelcules
Total (without water)80,1112
Polymers79,6451
Non-polymers4671
Water00
1


  • Idetical with deposited unit
  • defined by author&software
  • Evidence: electron microscopy, not applicable
TypeNameSymmetry operationNumber
identity operation1_555x,y,z1

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Components

#1: Protein Beta-adrenergic receptor kinase 1 / Beta-ARK-1 / G-protein-coupled receptor kinase 2


Mass: 79644.727 Da / Num. of mol.: 1 / Mutation: A292P,R295I,S455D
Source method: isolated from a genetically manipulated source
Source: (gene. exp.) Bos taurus (cattle) / Gene: GRK2, ADRBK1 / Production host: Spodoptera frugiperda (fall armyworm)
References: UniProt: P21146, beta-adrenergic-receptor kinase
#2: Chemical ChemComp-STU / STAUROSPORINE


Mass: 466.531 Da / Num. of mol.: 1 / Source method: obtained synthetically / Formula: C28H26N4O3 / Feature type: SUBJECT OF INVESTIGATION / Comment: anticancer, antifungal, antibiotic, alkaloid*YM
Has ligand of interestY

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Experimental details

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Experiment

ExperimentMethod: ELECTRON MICROSCOPY
EM experimentAggregation state: PARTICLE / 3D reconstruction method: single particle reconstruction

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Sample preparation

ComponentName: Focused refinement structure of GRK2 in NTSR1-GRK2-Galpha(q) complexes
Type: COMPLEX / Entity ID: #1 / Source: RECOMBINANT
Source (natural)Organism: Bos taurus (cattle)
Source (recombinant)Organism: Spodoptera frugiperda (fall armyworm)
Buffer solutionpH: 7.4
SpecimenEmbedding applied: NO / Shadowing applied: NO / Staining applied: NO / Vitrification applied: YES
VitrificationCryogen name: ETHANE

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Electron microscopy imaging

Experimental equipment
Model: Titan Krios / Image courtesy: FEI Company
MicroscopyModel: FEI TITAN KRIOS
Electron gunElectron source: FIELD EMISSION GUN / Accelerating voltage: 300 kV / Illumination mode: FLOOD BEAM
Electron lensMode: DARK FIELD / Nominal defocus max: 2200 nm / Nominal defocus min: 1200 nm
Image recordingElectron dose: 50 e/Å2 / Film or detector model: GATAN K3 BIOQUANTUM (6k x 4k)

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Processing

CTF correctionType: NONE
3D reconstructionResolution: 2.81 Å / Resolution method: FSC 0.143 CUT-OFF / Num. of particles: 474232 / Symmetry type: POINT

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