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- EMDB-10909: Human TRPC5 in the presence of 50 uM Pico145 (HC-608) -

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Basic information

Entry
Database: EMDB / ID: EMD-10909
TitleHuman TRPC5 in the presence of 50 uM Pico145 (HC-608)
Map data
Sample
  • Complex: Homotetrameric TRPC5
Function / homology
Function and homology information


regulation of membrane hyperpolarization / phosphatidylserine exposure on apoptotic cell surface / negative regulation of dendrite morphogenesis / Role of second messengers in netrin-1 signaling / store-operated calcium channel activity / cation channel complex / inositol 1,4,5 trisphosphate binding / actinin binding / TRP channels / clathrin binding ...regulation of membrane hyperpolarization / phosphatidylserine exposure on apoptotic cell surface / negative regulation of dendrite morphogenesis / Role of second messengers in netrin-1 signaling / store-operated calcium channel activity / cation channel complex / inositol 1,4,5 trisphosphate binding / actinin binding / TRP channels / clathrin binding / detection of maltose stimulus / maltose binding / maltose transport complex / maltose transport / maltodextrin transmembrane transport / carbohydrate transmembrane transporter activity / ATP-binding cassette (ABC) transporter complex, substrate-binding subunit-containing / carbohydrate transport / positive regulation of axon extension / calcium channel complex / regulation of cytosolic calcium ion concentration / positive regulation of neuron differentiation / ATP-binding cassette (ABC) transporter complex / cell chemotaxis / positive regulation of peptidyl-threonine phosphorylation / calcium ion transmembrane transport / calcium channel activity / neuron differentiation / calcium ion transport / outer membrane-bounded periplasmic space / nervous system development / actin binding / ATPase binding / positive regulation of cytosolic calcium ion concentration / growth cone / neuron apoptotic process / periplasmic space / dendrite / neuronal cell body / DNA damage response / positive regulation of cell population proliferation / membrane / plasma membrane
Similarity search - Function
Transient receptor potential channel, canonical 5 / Transient receptor ion channel II / Transient receptor ion channel domain / Transient receptor ion channel II / Transient receptor potential channel, canonical / 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 ...Transient receptor potential channel, canonical 5 / Transient receptor ion channel II / Transient receptor ion channel domain / Transient receptor ion channel II / Transient receptor potential channel, canonical / 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 / Ankyrin repeat / Ankyrin repeats (3 copies) / ankyrin repeats / Ankyrin repeat / Ankyrin repeat-containing domain superfamily / Ion transport domain / Ion transport protein
Similarity search - Domain/homology
Maltose/maltodextrin-binding periplasmic protein / Short transient receptor potential channel 5
Similarity search - Component
Biological speciesHomo sapiens (human)
Methodsingle particle reconstruction / cryo EM / Resolution: 2.9 Å
AuthorsWright DJ / Johnson RM / Muench SP / Bon RS
Funding support United Kingdom, 1 items
OrganizationGrant numberCountry
Biotechnology and Biological Sciences Research Council (BBSRC)BB/P020208/1 United Kingdom
CitationJournal: Commun Biol / Year: 2020
Title: Human TRPC5 structures reveal interaction of a xanthine-based TRPC1/4/5 inhibitor with a conserved lipid binding site.
Authors: David J Wright / Katie J Simmons / Rachel M Johnson / David J Beech / Stephen P Muench / Robin S Bon /
Abstract: TRPC1/4/5 channels are non-specific cation channels implicated in a wide variety of diseases, and TRPC1/4/5 inhibitors have recently entered clinical trials. However, fundamental and translational ...TRPC1/4/5 channels are non-specific cation channels implicated in a wide variety of diseases, and TRPC1/4/5 inhibitors have recently entered clinical trials. However, fundamental and translational studies require a better understanding of TRPC1/4/5 channel regulation by endogenous and exogenous factors. Although several potent and selective TRPC1/4/5 modulators have been reported, the paucity of mechanistic insights into their modes-of-action remains a barrier to the development of new chemical probes and drug candidates. Xanthine-based modulators include the most potent and selective TRPC1/4/5 inhibitors described to date, as well as TRPC5 activators. Our previous studies suggest that xanthines interact with a, so far, elusive pocket of TRPC1/4/5 channels that is essential to channel gating. Here we report the structure of a small-molecule-bound TRPC1/4/5 channel-human TRPC5 in complex with the xanthine Pico145-to 3.0 Å. We found that Pico145 binds to a conserved lipid binding site of TRPC5, where it displaces a bound phospholipid. Our findings explain the mode-of-action of xanthine-based TRPC1/4/5 modulators, and suggest a structural basis for TRPC1/4/5 modulation by endogenous factors such as (phospho)lipids and Zn ions. These studies lay the foundations for the structure-based design of new generations of TRPC1/4/5 modulators.
History
DepositionApr 23, 2020-
Header (metadata) releaseDec 2, 2020-
Map releaseDec 2, 2020-
UpdateDec 9, 2020-
Current statusDec 9, 2020Processing site: PDBe / Status: Released

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Structure visualization

Movie
  • Surface view with section colored by density value
  • Surface level: 0.035
  • Imaged by UCSF Chimera
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  • Surface view colored by cylindrical radius
  • Surface level: 0.035
  • Imaged by UCSF Chimera
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Movie viewer
Structure viewerEM map:
SurfViewMolmilJmol/JSmol
Supplemental images

emd_10909.png

Downloads & links

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Map

FileDownload / File: emd_10909.map.gz / Format: CCP4 / Size: 64 MB / Type: IMAGE STORED AS FLOATING POINT NUMBER (4 BYTES)
Voxel sizeX=Y=Z: 1.07 Å
Density
Contour LevelBy AUTHOR: 0.035 / Movie #1: 0.035
Minimum - Maximum-0.20173956 - 0.2687431
Average (Standard dev.)0.0000672918 (±0.008348389)
SymmetrySpace group: 1
Details

EMDB XML:

Map geometry
Axis orderXYZ
Origin000
Dimensions256256256
Spacing256256256
CellA=B=C: 273.92 Å
α=β=γ: 90.0 °

CCP4 map header:

modeImage stored as Reals
Å/pix. X/Y/Z1.071.071.07
M x/y/z256256256
origin x/y/z0.0000.0000.000
length x/y/z273.920273.920273.920
α/β/γ90.00090.00090.000
start NX/NY/NZ-31-35-52
NX/NY/NZ11798209
MAP C/R/S123
start NC/NR/NS000
NC/NR/NS256256256
D min/max/mean-0.2020.2690.000

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Supplemental data

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Sample components

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Entire : Homotetrameric TRPC5

EntireName: Homotetrameric TRPC5
Components
  • Complex: Homotetrameric TRPC5

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Supramolecule #1: Homotetrameric TRPC5

SupramoleculeName: Homotetrameric TRPC5 / type: complex / ID: 1 / Parent: 0 / Macromolecule list: #1-#4
Source (natural)Organism: Homo sapiens (human)
Recombinant expressionOrganism: Homo sapiens (human)

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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 mg/mL
BufferpH: 7.5
Component:
ConcentrationFormulaName
150.0 mMNaClSodium chlorideSodium Chloride
30.0 mMHEPES
1.0 mMDTT
VitrificationCryogen name: ETHANE

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Electron microscopy

MicroscopeFEI TITAN KRIOS
Electron beamAcceleration voltage: 300 kV / Electron source: FIELD EMISSION GUN
Electron opticsIllumination mode: FLOOD BEAM / Imaging mode: BRIGHT FIELDBright-field microscopy
Image recordingFilm or detector model: GATAN K2 SUMMIT (4k x 4k) / Average electron dose: 60.0 e/Å2
Experimental equipment
Model: Titan Krios / Image courtesy: FEI Company

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Image processing

Startup modelType of model: PDB ENTRY
PDB model - PDB ID:

6aei

Initial angle assignmentType: NOT APPLICABLE
Final angle assignmentType: NOT APPLICABLE
Final reconstructionResolution.type: BY AUTHOR / Resolution: 2.9 Å / Resolution method: FSC 0.143 CUT-OFF / Software - Name: RELION / Software - details: 3.0.7 / Number images used: 158548

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