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- PDB-8xb2: Structure of radafaxine-bound state of the human Norepinephrine T... -

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Basic information

Entry
Database: PDB / ID: 8xb2
TitleStructure of radafaxine-bound state of the human Norepinephrine Transporter
ComponentsGFP-MBP-solute carrier family 6 member 2,Maltose/maltodextrin-binding periplasmic protein,Sodium-dependent noradrenaline transporter,Maltose/maltodextrin-binding periplasmic protein,Sodium-dependent noradrenaline transporter
KeywordsTRANSPORT PROTEIN / antidepressant / bupropion
Function / homology
Function and homology information


neurotransmitter:sodium symporter activity / Defective SLC6A2 causes orthostatic intolerance (OI) / norepinephrine uptake / norepinephrine:sodium symporter activity / norepinephrine transport / dopamine:sodium symporter activity / neurotransmitter transmembrane transporter activity / monoamine transmembrane transporter activity / monoamine transport / Na+/Cl- dependent neurotransmitter transporters ...neurotransmitter:sodium symporter activity / Defective SLC6A2 causes orthostatic intolerance (OI) / norepinephrine uptake / norepinephrine:sodium symporter activity / norepinephrine transport / dopamine:sodium symporter activity / neurotransmitter transmembrane transporter activity / monoamine transmembrane transporter activity / monoamine transport / Na+/Cl- dependent neurotransmitter transporters / neurotransmitter transport / neuronal cell body membrane / response to pain / dopamine uptake involved in synaptic transmission / detection of maltose stimulus / amino acid transport / beta-tubulin binding / maltose transport complex / carbohydrate transport / carbohydrate transmembrane transporter activity / maltose binding / alpha-tubulin binding / maltose transport / maltodextrin transmembrane transport / ATP-binding cassette (ABC) transporter complex, substrate-binding subunit-containing / sodium ion transmembrane transport / ATP-binding cassette (ABC) transporter complex / cell chemotaxis / neuron cellular homeostasis / synaptic vesicle membrane / presynaptic membrane / actin binding / outer membrane-bounded periplasmic space / chemical synaptic transmission / periplasmic space / response to xenobiotic stimulus / axon / DNA damage response / cell surface / metal ion binding / membrane / plasma membrane
Similarity search - Function
Sodium:neurotransmitter symporter, noradrenaline / Sodium:neurotransmitter symporter family signature 2. / Sodium:neurotransmitter symporter family signature 1. / Sodium:neurotransmitter symporter / Sodium:neurotransmitter symporter superfamily / Sodium:neurotransmitter symporter family / Sodium:neurotransmitter symporter family profile. / Maltose/Cyclodextrin ABC transporter, substrate-binding protein / Solute-binding family 1, conserved site / Bacterial extracellular solute-binding proteins, family 1 signature. ...Sodium:neurotransmitter symporter, noradrenaline / Sodium:neurotransmitter symporter family signature 2. / Sodium:neurotransmitter symporter family signature 1. / Sodium:neurotransmitter symporter / Sodium:neurotransmitter symporter superfamily / Sodium:neurotransmitter symporter family / Sodium:neurotransmitter symporter family profile. / Maltose/Cyclodextrin ABC transporter, substrate-binding protein / Solute-binding family 1, conserved site / Bacterial extracellular solute-binding proteins, family 1 signature. / Bacterial extracellular solute-binding protein / Bacterial extracellular solute-binding protein
Similarity search - Domain/homology
: / Maltose/maltodextrin-binding periplasmic protein / Sodium-dependent noradrenaline transporter
Similarity search - Component
Biological speciesHomo sapiens (human)
Escherichia coli K-12 (bacteria)
MethodELECTRON MICROSCOPY / single particle reconstruction / cryo EM / Resolution: 3.04 Å
AuthorsWu, J.X. / Ji, W.M.
Funding support China, 1items
OrganizationGrant numberCountry
National Natural Science Foundation of China (NSFC)32371266 China
CitationJournal: Nature / Year: 2024
Title: Substrate binding and inhibition mechanism of norepinephrine transporter.
Authors: Wenming Ji / Anran Miao / Kai Liang / Jiameng Liu / Yuhan Qi / Yue Zhou / Xinli Duan / Jixue Sun / Lipeng Lai / Jing-Xiang Wu /
Abstract: Norepinephrine transporter (NET; encoded by SLC6A2) reuptakes the majority of the released noradrenaline back to the presynaptic terminals, thereby affecting the synaptic noradrenaline level. Genetic ...Norepinephrine transporter (NET; encoded by SLC6A2) reuptakes the majority of the released noradrenaline back to the presynaptic terminals, thereby affecting the synaptic noradrenaline level. Genetic mutations and dysregulation of NET are associated with a spectrum of neurological conditions in humans, making NET an important therapeutic target. However, the structure and mechanism of NET remain unclear. Here we provide cryogenic electron microscopy structures of the human NET (hNET) in three functional states-the apo state, and in states bound to the substrate meta-iodobenzylguanidine (MIBG) or the orthosteric inhibitor radafaxine. These structures were captured in an inward-facing conformation, with a tightly sealed extracellular gate and an open intracellular gate. The substrate MIBG binds at the centre of hNET. Radafaxine also occupies the substrate-binding site and might block the structural transition of hNET for inhibition. These structures provide insights into the mechanism of substrate recognition and orthosteric inhibition of hNET.
History
DepositionDec 5, 2023Deposition site: PDBJ / Processing site: PDBJ
Revision 1.0Jul 10, 2024Provider: repository / Type: Initial release
Revision 1.1Aug 28, 2024Group: Data collection / Database references / Category: citation / citation_author / em_admin
Item: _citation.country / _citation.journal_abbrev ..._citation.country / _citation.journal_abbrev / _citation.journal_id_ASTM / _citation.journal_id_CSD / _citation.journal_id_ISSN / _citation.pdbx_database_id_DOI / _citation.pdbx_database_id_PubMed / _citation.title / _citation.year / _em_admin.last_update
Revision 1.2Sep 18, 2024Group: Data collection / Category: em_admin / Item: _em_admin.last_update
Revision 1.3Sep 25, 2024Group: Data collection / Database references / Category: citation / citation_author / em_admin
Item: _citation.journal_volume / _citation.page_first ..._citation.journal_volume / _citation.page_first / _citation.page_last / _citation_author.identifier_ORCID / _em_admin.last_update
Revision 1.4Oct 16, 2024Group: Data collection / Structure summary
Category: em_admin / pdbx_entry_details / pdbx_modification_feature
Item: _em_admin.last_update / _pdbx_entry_details.has_protein_modification
Revision 1.5Nov 20, 2024Group: Data collection / Derived calculations / Structure summary
Category: chem_comp / em_admin ...chem_comp / em_admin / entity / pdbx_entity_nonpoly
Item: _chem_comp.name / _chem_comp.pdbx_synonyms ..._chem_comp.name / _chem_comp.pdbx_synonyms / _em_admin.last_update / _entity.pdbx_description / _pdbx_entity_nonpoly.name

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Structure visualization

Structure viewerMolecule:
MolmilJmol/JSmol

Downloads & links

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Assembly

Deposited unit
A: GFP-MBP-solute carrier family 6 member 2,Maltose/maltodextrin-binding periplasmic protein,Sodium-dependent noradrenaline transporter,Maltose/maltodextrin-binding periplasmic protein,Sodium-dependent noradrenaline transporter
hetero molecules


Theoretical massNumber of molelcules
Total (without water)139,1743
Polymers138,6971
Non-polymers4772
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 GFP-MBP-solute carrier family 6 member 2,Maltose/maltodextrin-binding periplasmic protein,Sodium-dependent noradrenaline transporter,Maltose/maltodextrin-binding periplasmic protein,Sodium-dependent noradrenaline transporter / MMBP / Maltodextrin-binding protein / Maltose-binding protein / MBP / Norepinephrine transporter / ...MMBP / Maltodextrin-binding protein / Maltose-binding protein / MBP / Norepinephrine transporter / NET / Solute carrier family 6 member 2


Mass: 138697.016 Da / Num. of mol.: 1
Source method: isolated from a genetically manipulated source
Source: (gene. exp.) Homo sapiens (human), (gene. exp.) Escherichia coli K-12 (bacteria)
Gene: SLC6A2, malE, b4034, JW3994, SLC6A2, NAT1, NET1, SLC6A5
Cell line (production host): HEK293 / Production host: Homo sapiens (human) / References: UniProt: P0AEX9, UniProt: P23975
#2: 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.: 1 / 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
#3: Chemical ChemComp-YNT / Radafaxine / (2~{S},3~{S})-2-(3-chlorophenyl)-3,5,5-trimethyl-morpholin-2-ol


Mass: 255.741 Da / Num. of mol.: 1 / Source method: obtained synthetically / Formula: C13H18ClNO2
Has ligand of interestY
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: NET / Type: COMPLEX / Entity ID: #1 / Source: RECOMBINANT
Source (natural)Organism: Homo sapiens (human)
Source (recombinant)Organism: Homo sapiens (human)
Buffer solutionpH: 7.5
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: BRIGHT FIELD / Calibrated magnification: 64000 X / Nominal defocus max: 2000 nm / Nominal defocus min: 1000 nm
Image recordingElectron dose: 50 e/Å2 / Film or detector model: GATAN K3 BIOQUANTUM (6k x 4k)

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Processing

EM softwareName: PHENIX / Version: 1.16_3549: / Category: model refinement
CTF correctionType: NONE
3D reconstructionResolution: 3.04 Å / Resolution method: FSC 0.143 CUT-OFF / Num. of particles: 146222 / Symmetry type: POINT
Refine LS restraints
Refine-IDTypeDev idealNumber
ELECTRON MICROSCOPYf_bond_d0.0044483
ELECTRON MICROSCOPYf_angle_d0.4626134
ELECTRON MICROSCOPYf_dihedral_angle_d4.3762481
ELECTRON MICROSCOPYf_chiral_restr0.039683
ELECTRON MICROSCOPYf_plane_restr0.004738

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