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- EMDB-7088: Cryo-EM structure of serotonin receptor -

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Basic information

Entry
Database: EMDB / ID: EMD-7088
TitleCryo-EM structure of serotonin receptor
Map dataRecommended contour is 0.027 and step 1 in UCSF chimera
Sample
  • Organelle or cellular component: Serotonin receptor
    • Protein or peptide: 5-hydroxytryptamine receptor 3A
  • Ligand: 2-acetamido-2-deoxy-beta-D-glucopyranose
  • Ligand: SODIUM ION
  • Ligand: 1,2-DIMYRISTOYL-SN-GLYCERO-3-PHOSPHOCHOLINE
  • Ligand: CHLORIDE ION
  • Ligand: beta-D-mannopyranose
  • Ligand: water
KeywordsIon Channel / MEMBRANE PROTEIN
Function / homology
Function and homology information


Neurotransmitter receptors and postsynaptic signal transmission / serotonin-gated monoatomic cation channel activity / serotonin-activated cation-selective channel complex / serotonin receptor signaling pathway / serotonin binding / inorganic cation transmembrane transport / excitatory extracellular ligand-gated monoatomic ion channel activity / cleavage furrow / transmembrane transporter complex / ligand-gated monoatomic ion channel activity involved in regulation of presynaptic membrane potential ...Neurotransmitter receptors and postsynaptic signal transmission / serotonin-gated monoatomic cation channel activity / serotonin-activated cation-selective channel complex / serotonin receptor signaling pathway / serotonin binding / inorganic cation transmembrane transport / excitatory extracellular ligand-gated monoatomic ion channel activity / cleavage furrow / transmembrane transporter complex / ligand-gated monoatomic ion channel activity involved in regulation of presynaptic membrane potential / transmitter-gated monoatomic ion channel activity involved in regulation of postsynaptic membrane potential / presynaptic membrane / postsynaptic membrane / neuron projection / axon / neuronal cell body / glutamatergic synapse / synapse / identical protein binding / plasma membrane
Similarity search - Function
5-hydroxytryptamine 3 receptor / 5-hydroxytryptamine 3 receptor, A subunit / : / Neurotransmitter-gated ion-channel, conserved site / Neurotransmitter-gated ion-channels signature. / Neurotransmitter-gated ion-channel transmembrane domain / Neurotransmitter-gated ion-channel transmembrane region / Neurotransmitter-gated ion-channel transmembrane domain superfamily / Neuronal acetylcholine receptor / Neurotransmitter-gated ion-channel ...5-hydroxytryptamine 3 receptor / 5-hydroxytryptamine 3 receptor, A subunit / : / Neurotransmitter-gated ion-channel, conserved site / Neurotransmitter-gated ion-channels signature. / Neurotransmitter-gated ion-channel transmembrane domain / Neurotransmitter-gated ion-channel transmembrane region / Neurotransmitter-gated ion-channel transmembrane domain superfamily / Neuronal acetylcholine receptor / Neurotransmitter-gated ion-channel / Neurotransmitter-gated ion-channel ligand-binding domain / Neurotransmitter-gated ion-channel ligand-binding domain superfamily / Neurotransmitter-gated ion-channel ligand binding domain
Similarity search - Domain/homology
5-hydroxytryptamine receptor 3A / 5-hydroxytryptamine receptor 3A
Similarity search - Component
Biological speciesMus musculus (house mouse)
Methodsingle particle reconstruction / cryo EM / Resolution: 4.31 Å
AuthorsBasak S / Chakrapani S
Funding support United States, 3 items
OrganizationGrant numberCountry
National Institutes of Health/National Institute of General Medical Sciences (NIH/NIGMS)1R01GM108921 United States
National Institutes of Health/National Institute of General Medical Sciences (NIH/NIGMS)3R01GM108921-03S1 United States
American Heart Association17POST33671152 United States
CitationJournal: Nat Commun / Year: 2018
Title: Cryo-EM structure of 5-HT receptor in its resting conformation.
Authors: Sandip Basak / Yvonne Gicheru / Amrita Samanta / Sudheer Kumar Molugu / Wei Huang / Maria la de Fuente / Taylor Hughes / Derek J Taylor / Marvin T Nieman / Vera Moiseenkova-Bell / Sudha Chakrapani /
Abstract: Serotonin receptors (5-HTR) directly regulate gut movement, and drugs that inhibit 5-HTR function are used to control emetic reflexes associated with gastrointestinal pathologies and cancer therapies. ...Serotonin receptors (5-HTR) directly regulate gut movement, and drugs that inhibit 5-HTR function are used to control emetic reflexes associated with gastrointestinal pathologies and cancer therapies. The 5-HTR function involves a finely tuned orchestration of three domain movements that include the ligand-binding domain, the pore domain, and the intracellular domain. Here, we present the structure from the full-length 5-HTR channel in the apo-state determined by single-particle cryo-electron microscopy at a nominal resolution of 4.3 Å. In this conformation, the ligand-binding domain adopts a conformation reminiscent of the unliganded state with the pore domain captured in a closed conformation. In comparison to the 5-HTR crystal structure, the full-length channel in the apo-conformation adopts a more expanded conformation of all the three domains with a characteristic twist that is implicated in gating.
History
DepositionOct 24, 2017-
Header (metadata) releaseFeb 7, 2018-
Map releaseFeb 7, 2018-
UpdateOct 23, 2024-
Current statusOct 23, 2024Processing site: RCSB / Status: Released

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Structure visualization

Movie
  • Surface view with section colored by density value
  • Surface level: 0.027
  • Imaged by UCSF Chimera
  • Download
  • Surface view colored by cylindrical radius
  • Surface level: 0.027
  • Imaged by UCSF Chimera
  • Download
  • Surface view with fitted model
  • Atomic models: PDB-6be1
  • Surface level: 0.027
  • Imaged by UCSF Chimera
  • Download
Movie viewer
Structure viewerEM map:
SurfViewMolmilJmol/JSmol
Supplemental images

emd_7088.png

Downloads & links

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Map

FileDownload / File: emd_7088.map.gz / Format: CCP4 / Size: 103 MB / Type: IMAGE STORED AS FLOATING POINT NUMBER (4 BYTES)
AnnotationRecommended contour is 0.027 and step 1 in UCSF chimera
Projections & slices

Image control

Size
Brightness
Contrast
Others
AxesZ (Sec.)Y (Row.)X (Col.)
1.06 Å/pix.
x 300 pix.
= 319.2 Å		1.06 Å/pix.
x 300 pix.
= 319.2 Å		1.06 Å/pix.
x 300 pix.
= 319.2 Å

Surface

Projections

Slices (1/3)

Slices (1/2)

Slices (2/3)

Images are generated by Spider.

Voxel sizeX=Y=Z: 1.064 Å
Density

Histogram

Histogram (log scale)
Contour LevelBy AUTHOR: 0.027 / Movie #1: 0.027
Minimum - Maximum-0.059908234 - 0.13375607
Average (Standard dev.)0.00047725835 (±0.003618337)
SymmetrySpace group: 1
Details

EMDB XML:

Map geometry
Axis orderXYZ
Origin000
Dimensions300300300
Spacing300300300
CellA=B=C: 319.2 Å
α=β=γ: 90.0 °

CCP4 map header:

modeImage stored as Reals
Å/pix. X/Y/Z1.0641.0641.064
M x/y/z300300300
origin x/y/z0.0000.0000.000
length x/y/z319.200319.200319.200
α/β/γ90.00090.00090.000
MAP C/R/S123
start NC/NR/NS000
NC/NR/NS300300300
D min/max/mean-0.0600.1340.000

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Supplemental data

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Sample components

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Entire : Serotonin receptor

EntireName: Serotonin receptor
Components
  • Organelle or cellular component: Serotonin receptor
    • Protein or peptide: 5-hydroxytryptamine receptor 3A
  • Ligand: 2-acetamido-2-deoxy-beta-D-glucopyranose
  • Ligand: SODIUM ION
  • Ligand: 1,2-DIMYRISTOYL-SN-GLYCERO-3-PHOSPHOCHOLINE
  • Ligand: CHLORIDE ION
  • Ligand: beta-D-mannopyranose
  • Ligand: water

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Supramolecule #1: Serotonin receptor

SupramoleculeName: Serotonin receptor / type: organelle_or_cellular_component / ID: 1 / Parent: 0 / Macromolecule list: #1
Source (natural)Organism: Mus musculus (house mouse)
Molecular weightTheoretical: 270 kDa/nm

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Macromolecule #1: 5-hydroxytryptamine receptor 3A

MacromoleculeName: 5-hydroxytryptamine receptor 3A / type: protein_or_peptide / ID: 1 / Number of copies: 5 / Enantiomer: LEVO
Source (natural)Organism: Mus musculus (house mouse)
Molecular weightTheoretical: 52.739852 KDa
Recombinant expressionOrganism: Spodoptera frugiperda (fall armyworm)
SequenceString: DTTQPALLRL SDHLLANYKK GVRPVRDWRK PTTVSIDVIM YAILNVDEKN QVLTTYIWYR QYWTDEFLQW TPEDFDNVTK LSIPTDSIW VPDILINEFV DVGKSPNIPY VYVHHRGEVQ NYKPLQLVTA CSLDIYNFPF DVQNCSLTFT SWLHTIQDIN I TLWRSPEE ...String:
DTTQPALLRL SDHLLANYKK GVRPVRDWRK PTTVSIDVIM YAILNVDEKN QVLTTYIWYR QYWTDEFLQW TPEDFDNVTK LSIPTDSIW VPDILINEFV DVGKSPNIPY VYVHHRGEVQ NYKPLQLVTA CSLDIYNFPF DVQNCSLTFT SWLHTIQDIN I TLWRSPEE VRSDKSIFIN QGEWELLEVF PQFKEFSIDI SNSYAEMKFY VIIRRRPLFY AVSLLLPSIF LMVVDIVGFC LP PDSGERV SFKITLLLGY SVFLIIVSDT LPATAIGTPL IGVYFVVCMA LLVISLAETI FIVRLVHKQD LQRPVPDWLR HLV LDRIAW ILCLGEQPMA HRPPATFQAN KTDDCSGSDL LPAMGNHCSH VGGPQDLEKT PRGRGSPLPP PREASLAVRG LLQE LSSIR HFLEKRDEMR EVARDWLRVG YVLDRLLFRI YLLAVLAYSI TLVTLWSIWH YS

UniProtKB: 5-hydroxytryptamine receptor 3A

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Macromolecule #6: 2-acetamido-2-deoxy-beta-D-glucopyranose

MacromoleculeName: 2-acetamido-2-deoxy-beta-D-glucopyranose / type: ligand / ID: 6 / Number of copies: 5 / Formula: NAG
Molecular weightTheoretical: 221.208 Da
Chemical component information

ChemComp-NAG:
2-acetamido-2-deoxy-beta-D-glucopyranose

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Macromolecule #7: SODIUM ION

MacromoleculeName: SODIUM ION / type: ligand / ID: 7 / Number of copies: 1
Molecular weightTheoretical: 22.99 Da

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Macromolecule #8: 1,2-DIMYRISTOYL-SN-GLYCERO-3-PHOSPHOCHOLINE

MacromoleculeName: 1,2-DIMYRISTOYL-SN-GLYCERO-3-PHOSPHOCHOLINE / type: ligand / ID: 8 / Number of copies: 5 / Formula: PX4
Molecular weightTheoretical: 678.94 Da
Chemical component information

ChemComp-PX4:
1,2-DIMYRISTOYL-SN-GLYCERO-3-PHOSPHOCHOLINE / DMPC, phospholipid*YM

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Macromolecule #9: CHLORIDE ION

MacromoleculeName: CHLORIDE ION / type: ligand / ID: 9 / Number of copies: 1 / Formula: CL
Molecular weightTheoretical: 35.453 Da

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Macromolecule #10: beta-D-mannopyranose

MacromoleculeName: beta-D-mannopyranose / type: ligand / ID: 10 / Number of copies: 1 / Formula: BMA
Molecular weightTheoretical: 180.156 Da
Chemical component information

ChemComp-BMA:
beta-D-mannopyranose

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Macromolecule #11: water

MacromoleculeName: water / type: ligand / ID: 11 / Number of copies: 11 / Formula: HOH
Molecular weightTheoretical: 18.015 Da
Chemical component information

ChemComp-HOH:
WATER

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Experimental details

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Structure determination

Methodcryo EM
Processingsingle particle reconstruction
Aggregation stateparticle

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Sample preparation

Concentration2.5 mg/mL
BufferpH: 8
GridModel: Quantifoil R1.2/1.3 / Material: COPPER / Mesh: 300 / Support film - Material: CARBON / Support film - topology: HOLEY / Pretreatment - Type: GLOW DISCHARGE / Pretreatment - Time: 15 sec.
VitrificationCryogen name: ETHANE / Chamber humidity: 100 % / Chamber temperature: 277 K / Instrument: FEI VITROBOT MARK I / Details: blot for 2.5 sec..

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Electron microscopy

MicroscopeFEI TITAN KRIOS
Image recordingFilm or detector model: GATAN K2 SUMMIT (4k x 4k) / Detector mode: COUNTING / Digitization - Frames/image: 2-39 / Number real images: 3550 / Average electron dose: 40.0 e/Å2
Electron beamAcceleration voltage: 300 kV / Electron source: FIELD EMISSION GUN
Electron opticsC2 aperture diameter: 70.0 µm / Illumination mode: FLOOD BEAM / Imaging mode: BRIGHT FIELD / Cs: 2.7 mm / Nominal magnification: 130000
Sample stageCooling holder cryogen: NITROGEN
Experimental equipment
Model: Titan Krios / Image courtesy: FEI Company

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Image processing

Particle selectionNumber selected: 327329
Startup modelType of model: PDB ENTRY
PDB model - PDB ID:

4pir

Final reconstructionNumber classes used: 2 / Resolution.type: BY AUTHOR / Resolution: 4.31 Å / Resolution method: FSC 0.143 CUT-OFF / Software - Name: RELION (ver. 2.03) / Number images used: 108727
Initial angle assignmentType: RANDOM ASSIGNMENT / Software - Name: RELION (ver. 2.03)
Final angle assignmentType: ANGULAR RECONSTITUTION / Software - Name: RELION (ver. 2.03)
Final 3D classificationNumber classes: 3 / Software - Name: RELION (ver. 2.03)

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Atomic model buiding 1

RefinementSpace: REAL / Protocol: OTHER / Overall B value: 238
Output model

PDB-6be1:
Cryo-EM structure of serotonin receptor

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