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- PDB-8jpf: Focused refiment structure of NTSR1 in NTSR1-GRK2-Galpha(q) complexes -

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Basic information

Entry
Database: PDB / ID: 8jpf
TitleFocused refiment structure of NTSR1 in NTSR1-GRK2-Galpha(q) complexes
Components
  • NTS
  • Neurotensin receptor type 1
KeywordsSIGNALING PROTEIN / Biased signaling
Function / homology
Function and homology information


G protein-coupled neurotensin receptor activity / inositol phosphate catabolic process / symmetric synapse / D-aspartate import across plasma membrane / positive regulation of gamma-aminobutyric acid secretion / regulation of membrane depolarization / positive regulation of arachidonate secretion / L-glutamate import across plasma membrane / regulation of respiratory gaseous exchange / positive regulation of inhibitory postsynaptic potential ...G protein-coupled neurotensin receptor activity / inositol phosphate catabolic process / symmetric synapse / D-aspartate import across plasma membrane / positive regulation of gamma-aminobutyric acid secretion / regulation of membrane depolarization / positive regulation of arachidonate secretion / L-glutamate import across plasma membrane / regulation of respiratory gaseous exchange / positive regulation of inhibitory postsynaptic potential / negative regulation of systemic arterial blood pressure / negative regulation of release of sequestered calcium ion into cytosol / positive regulation of glutamate secretion / positive regulation of inositol phosphate biosynthetic process / temperature homeostasis / response to lipid / detection of temperature stimulus involved in sensory perception of pain / neuropeptide signaling pathway / adult locomotory behavior / Peptide ligand-binding receptors / positive regulation of release of sequestered calcium ion into cytosol / dendritic shaft / learning / G protein-coupled receptor activity / terminal bouton / cytoplasmic side of plasma membrane / perikaryon / chemical synaptic transmission / G alpha (q) signalling events / dendritic spine / positive regulation of apoptotic process / membrane raft / G protein-coupled receptor signaling pathway / positive regulation of gene expression / protein-containing complex binding / negative regulation of apoptotic process / Golgi apparatus / cell surface / endoplasmic reticulum / identical protein binding / plasma membrane
Similarity search - Function
Neurotensin receptor / Neurotensin type 1 receptor / G-protein coupled receptors family 1 signature. / G protein-coupled receptor, rhodopsin-like / GPCR, rhodopsin-like, 7TM / G-protein coupled receptors family 1 profile. / 7 transmembrane receptor (rhodopsin family)
Similarity search - Domain/homology
Chem-SRW / Neurotensin receptor type 1
Similarity search - Component
Biological speciesHomo sapiens (human)
synthetic construct (others)
MethodELECTRON MICROSCOPY / single particle reconstruction / cryo EM / Resolution: 3.02 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

Downloads & links

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Assembly

Deposited unit
L: NTS
R: Neurotensin receptor type 1
hetero molecules


Theoretical massNumber of molelcules
Total (without water)47,5773
Polymers47,1272
Non-polymers4511
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/peptide NTS


Mass: 819.007 Da / Num. of mol.: 1 / Source method: obtained synthetically / Source: (synth.) synthetic construct (others)
#2: Protein Neurotensin receptor type 1 / NT-R-1 / NTR1 / High-affinity levocabastine-insensitive neurotensin receptor / NTRH


Mass: 46307.594 Da / Num. of mol.: 1
Source method: isolated from a genetically manipulated source
Source: (gene. exp.) Homo sapiens (human) / Gene: NTSR1, NTRR / Production host: Spodoptera frugiperda (fall armyworm) / References: UniProt: P30989
#3: Chemical ChemComp-SRW / 2-[{2-(1-fluorocyclopropyl)-4-[4-(2-methoxyphenyl)piperidin-1-yl]quinazolin-6-yl}(methyl)amino]ethan-1-ol


Mass: 450.548 Da / Num. of mol.: 1 / Source method: obtained synthetically / Formula: C26H31FN4O2
Has ligand of interestN

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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 refiment structure of NTSR1 in NTSR1-GRK2-Galpha(q) complexes
Type: COMPLEX / Entity ID: #1-#2 / Source: RECOMBINANT
Source (natural)Organism: Homo sapiens (human)
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: 3.02 Å / Resolution method: FSC 0.143 CUT-OFF / Num. of particles: 474232 / Symmetry type: POINT
Refine LS restraints
Refine-IDTypeDev idealNumber
ELECTRON MICROSCOPYf_bond_d0.0022287
ELECTRON MICROSCOPYf_angle_d0.483138
ELECTRON MICROSCOPYf_dihedral_angle_d4.147327
ELECTRON MICROSCOPYf_chiral_restr0.035390
ELECTRON MICROSCOPYf_plane_restr0.003388

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