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- PDB-9nr6: The structure of Noelin 1 with cerebellar GluA1/A4-ATD -

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Basic information

Entry
Database: PDB / ID: 9nr6
TitleThe structure of Noelin 1 with cerebellar GluA1/A4-ATD
Components
  • (Glutamate receptor ...) x 2
  • 11B8 scFv
  • Noelin
KeywordsMEMBRANE PROTEIN / iGluR / CP-AMPA receptors / Noelin 1
Function / homology
Function and homology information


atrioventricular valve formation / neuronal signal transduction / extrinsic component of postsynaptic density membrane / Cargo concentration in the ER / extrinsic component of synaptic membrane / axonal spine / positive regulation of locomotion involved in locomotory behavior / regulation of amyloid-beta formation / positive regulation of membrane potential / COPII-mediated vesicle transport ...atrioventricular valve formation / neuronal signal transduction / extrinsic component of postsynaptic density membrane / Cargo concentration in the ER / extrinsic component of synaptic membrane / axonal spine / positive regulation of locomotion involved in locomotory behavior / regulation of amyloid-beta formation / positive regulation of membrane potential / COPII-mediated vesicle transport / cardiac epithelial to mesenchymal transition / cellular response to ammonium ion / response to sucrose / neuron spine / myosin V binding / proximal dendrite / Trafficking of AMPA receptors / regulation of monoatomic ion transmembrane transport / response to arsenic-containing substance / kainate selective glutamate receptor complex / cellular response to L-glutamate / cellular response to dsRNA / dendritic spine membrane / regulation of synapse structure or activity / beta-2 adrenergic receptor binding / long-term synaptic depression / Synaptic adhesion-like molecules / regulation of axon extension / cellular response to peptide hormone stimulus / cellular response to amine stimulus / response to psychosocial stress / peptide hormone receptor binding / response to morphine / neuronal cell body membrane / spinal cord development / Activation of AMPA receptors / perisynaptic space / protein kinase A binding / regulation of neurotransmitter receptor localization to postsynaptic specialization membrane / AMPA glutamate receptor activity / Trafficking of GluR2-containing AMPA receptors / negative regulation of amyloid-beta formation / response to lithium ion / negative regulation of smooth muscle cell apoptotic process / behavioral response to pain / adenylate cyclase binding / immunoglobulin binding / asymmetric synapse / AMPA glutamate receptor complex / response to electrical stimulus / regulation of receptor recycling / ionotropic glutamate receptor complex / conditioned place preference / Unblocking of NMDA receptors, glutamate binding and activation / G-protein alpha-subunit binding / glutamate receptor binding / long-term memory / positive regulation of epithelial to mesenchymal transition / positive regulation of synaptic transmission / positive regulation of synaptic transmission, glutamatergic / axonal growth cone / postsynaptic density, intracellular component / response to fungicide / neuronal action potential / glutamate-gated receptor activity / cellular response to brain-derived neurotrophic factor stimulus / somatodendritic compartment / synapse assembly / glutamate-gated calcium ion channel activity / presynaptic active zone membrane / excitatory synapse / dendrite membrane / ligand-gated monoatomic ion channel activity involved in regulation of presynaptic membrane potential / synaptic membrane / positive regulation of excitatory postsynaptic potential / dendritic shaft / response to cocaine / PDZ domain binding / neuromuscular junction / synaptic transmission, glutamatergic / cellular response to amino acid stimulus / transmitter-gated monoatomic ion channel activity involved in regulation of postsynaptic membrane potential / response to nutrient levels / cerebral cortex development / regulation of synaptic plasticity / receptor internalization / recycling endosome / postsynaptic density membrane / modulation of chemical synaptic transmission / response to peptide hormone / cellular response to growth factor stimulus / small GTPase binding / response to toxic substance / recycling endosome membrane / terminal bouton / synaptic vesicle / cell-cell junction / long-term synaptic potentiation / response to estradiol / G-protein beta-subunit binding
Similarity search - Function
Noelin domain / Neurogenesis glycoprotein / : / Olfactomedin-like domain / Olfactomedin-like domain / Olfactomedin-like domain profile. / Olfactomedin-like domains / Quinoprotein amine dehydrogenase, beta chain-like / Endoplasmic reticulum targeting sequence. / Ionotropic glutamate receptor, metazoa ...Noelin domain / Neurogenesis glycoprotein / : / Olfactomedin-like domain / Olfactomedin-like domain / Olfactomedin-like domain profile. / Olfactomedin-like domains / Quinoprotein amine dehydrogenase, beta chain-like / Endoplasmic reticulum targeting sequence. / Ionotropic glutamate receptor, metazoa / Ligated ion channel L-glutamate- and glycine-binding site / Ionotropic glutamate receptor, L-glutamate and glycine-binding domain / Ligated ion channel L-glutamate- and glycine-binding site / Ligand-gated ion channel / : / Ionotropic glutamate receptor / Eukaryotic homologues of bacterial periplasmic substrate binding proteins. / Receptor, ligand binding region / Receptor family ligand binding region / Periplasmic binding protein-like I
Similarity search - Domain/homology
Glutamate receptor 1 / Glutamate receptor 4 / Noelin
Similarity search - Component
Biological speciesMus musculus (house mouse)
Rattus norvegicus (Norway rat)
MethodELECTRON MICROSCOPY / single particle reconstruction / cryo EM / Resolution: 3.26 Å
AuthorsFang, C.L. / Gouaux, E.
Funding support United States, 1items
OrganizationGrant numberCountry
Howard Hughes Medical Institute (HHMI) United States
CitationJournal: Nature / Year: 2025
Title: Gating and noelin clustering of native Ca-permeable AMPA receptors.
Authors: Chengli Fang / Cathy J Spangler / Jumi Park / Natalie Sheldon / Laurence O Trussell / Eric Gouaux /
Abstract: AMPA-type ionotropic glutamate receptors (AMPARs) are integral to fast excitatory synaptic transmission and have vital roles in synaptic plasticity, motor coordination, learning and memory. Whereas ...AMPA-type ionotropic glutamate receptors (AMPARs) are integral to fast excitatory synaptic transmission and have vital roles in synaptic plasticity, motor coordination, learning and memory. Whereas extensive structural studies have been conducted on recombinant AMPARs and native calcium-impermeable (CI)-AMPARs alongside their auxiliary proteins, the molecular architecture of native calcium-permeable (CP)-AMPARs has remained undefined. Here, to determine the subunit composition, physiological architecture and gating mechanisms of CP-AMPARs, we visualize these receptors, immunoaffinity purified from rat cerebella, and resolve their structures using cryo-electron microscopy (cryo-EM). Our results indicate that the predominant assembly consists of GluA1 and GluA4 subunits, with the GluA4 subunit occupying the B and D positions, and auxiliary subunits, including transmembrane AMPAR regulatory proteins (TARPs) located at the B' and D' positions, and cornichon homologues (CNIHs) or TARPs located at the A' and C' positions. Furthermore, we resolved the structure of the noelin (NOE1)-GluA1-GluA4 complex, in which NOE1 specifically binds to the GluA4 subunit at the B and D positions. Notably, NOE1 stabilizes the amino-terminal domain layer without affecting gating properties of the receptor. NOE1 contributes to AMPAR function by forming dimeric AMPAR assemblies that are likely to engage in extracellular networks, clustering receptors in synaptic environments and modulating receptor responsiveness to synaptic inputs.
History
DepositionMar 14, 2025Deposition site: RCSB / Processing site: RCSB
Revision 1.0Jul 2, 2025Provider: repository / Type: Initial release
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Structure visualization

Structure viewerMolecule:
MolmilJmol/JSmol

Downloads & links

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Assembly

Deposited unit
A: Glutamate receptor 1
B: Glutamate receptor 4
C: Glutamate receptor 1
D: Glutamate receptor 4
E: 11B8 scFv
F: 11B8 scFv
G: Noelin
H: Noelin
hetero molecules


Theoretical massNumber of molelcules
Total (without water)298,13030
Polymers290,8648
Non-polymers7,26722
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

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Glutamate receptor ... , 2 types, 4 molecules ACBD

#1: Protein Glutamate receptor 1 / GluR-1 / AMPA-selective glutamate receptor 1 / GluR-A / GluR-K1 / Glutamate receptor ionotropic / AMPA 1


Mass: 42956.734 Da / Num. of mol.: 2 / Source method: isolated from a natural source / Source: (natural) Rattus norvegicus (Norway rat) / References: UniProt: P19490
#2: Protein Glutamate receptor 4 / GluR-4 / GluR4 / AMPA-selective glutamate receptor 4 / GluR-D / Glutamate receptor ionotropic / AMPA 4 / GluA4


Mass: 43087.867 Da / Num. of mol.: 2 / Source method: isolated from a natural source / Source: (natural) Rattus norvegicus (Norway rat) / References: UniProt: P19493

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Antibody / Protein / Non-polymers , 3 types, 6 molecules EFGH

#3: Antibody 11B8 scFv


Mass: 27511.527 Da / Num. of mol.: 2
Source method: isolated from a genetically manipulated source
Source: (gene. exp.) Mus musculus (house mouse) / Production host: Spodoptera frugiperda (fall armyworm)
#4: Protein Noelin / 1B426B / Neuronal olfactomedin-related ER localized protein / Olfactomedin-1 / Pancortin


Mass: 31875.629 Da / Num. of mol.: 2 / Source method: isolated from a natural source / Source: (natural) Rattus norvegicus (Norway rat) / References: UniProt: Q62609
#8: Chemical ChemComp-CA / CALCIUM ION


Mass: 40.078 Da / Num. of mol.: 2 / Source method: obtained synthetically / Formula: Ca

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Sugars , 3 types, 20 molecules

#5: Polysaccharide beta-D-mannopyranose-(1-4)-2-acetamido-2-deoxy-beta-D-glucopyranose-(1-4)-2-acetamido-2-deoxy-beta- ...beta-D-mannopyranose-(1-4)-2-acetamido-2-deoxy-beta-D-glucopyranose-(1-4)-2-acetamido-2-deoxy-beta-D-glucopyranose


Type: oligosaccharide / Mass: 586.542 Da / Num. of mol.: 2 / Source method: obtained synthetically
DescriptorTypeProgram
DManpb1-4DGlcpNAcb1-4DGlcpNAcb1-ROHGlycam Condensed SequenceGMML 1.0
WURCS=2.0/2,3,2/[a2122h-1b_1-5_2*NCC/3=O][a1122h-1b_1-5]/1-1-2/a4-b1_b4-c1WURCSPDB2Glycan 1.1.0
[][D-1-deoxy-GlcpNAc]{[(4+1)][b-D-GlcpNAc]{[(4+1)][b-D-Manp]{}}}LINUCSPDB-CARE
#6: Polysaccharide
2-acetamido-2-deoxy-beta-D-glucopyranose-(1-4)-2-acetamido-2-deoxy-beta-D-glucopyranose


Type: oligosaccharide / Mass: 424.401 Da / Num. of mol.: 10
Source method: isolated from a genetically manipulated source
DescriptorTypeProgram
DGlcpNAcb1-4DGlcpNAcb1-ROHGlycam Condensed SequenceGMML 1.0
WURCS=2.0/1,2,1/[a2122h-1b_1-5_2*NCC/3=O]/1-1/a4-b1WURCSPDB2Glycan 1.1.0
[][D-1-deoxy-GlcpNAc]{[(4+1)][b-D-GlcpNAc]{}}LINUCSPDB-CARE
#7: Sugar
ChemComp-NAG / 2-acetamido-2-deoxy-beta-D-glucopyranose / N-acetyl-beta-D-glucosamine / 2-acetamido-2-deoxy-beta-D-glucose / 2-acetamido-2-deoxy-D-glucose / 2-acetamido-2-deoxy-glucose / N-ACETYL-D-GLUCOSAMINE


Type: D-saccharide, beta linking / Mass: 221.208 Da / Num. of mol.: 8 / Source method: obtained synthetically / Formula: C8H15NO6
IdentifierTypeProgram
DGlcpNAcbCONDENSED IUPAC CARBOHYDRATE SYMBOLGMML 1.0
N-acetyl-b-D-glucopyranosamineCOMMON NAMEGMML 1.0
b-D-GlcpNAcIUPAC CARBOHYDRATE SYMBOLPDB-CARE 1.0
GlcNAcSNFG CARBOHYDRATE SYMBOLGMML 1.0

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Details

Has ligand of interestN
Has protein modificationY

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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: CP-AMPA receptors / Type: COMPLEX / Entity ID: #1-#4 / Source: NATURAL
Source (natural)Organism: Rattus norvegicus (Norway rat)
Buffer solutionpH: 8
SpecimenConc.: 0.1 mg/ml / Embedding 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: TFS KRIOS
Electron gunElectron source: FIELD EMISSION GUN / Accelerating voltage: 300 kV / Illumination mode: FLOOD BEAM
Electron lensMode: OTHER / Nominal defocus max: 2200 nm / Nominal defocus min: 1200 nm
Image recordingElectron dose: 50 e/Å2 / Film or detector model: FEI FALCON IV (4k x 4k)

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Processing

EM softwareName: PHENIX / Version: 1.20.1_4487: / Category: model refinement
CTF correctionType: PHASE FLIPPING AND AMPLITUDE CORRECTION
SymmetryPoint symmetry: C2 (2 fold cyclic)
3D reconstructionResolution: 3.26 Å / Resolution method: FSC 0.143 CUT-OFF / Num. of particles: 143111 / Symmetry type: POINT
Refine LS restraints
Refine-IDTypeDev idealNumber
ELECTRON MICROSCOPYf_bond_d0.00919634
ELECTRON MICROSCOPYf_angle_d0.65126695
ELECTRON MICROSCOPYf_dihedral_angle_d5.5722930
ELECTRON MICROSCOPYf_chiral_restr0.0483063
ELECTRON MICROSCOPYf_plane_restr0.0043462

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