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- EMDB-22667: Cryo-EM structure of human TRPV6 in complex with (4- phenylcycloh... -

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Basic information

Entry
Database: EMDB / ID: EMD-22667
TitleCryo-EM structure of human TRPV6 in complex with (4- phenylcyclohexyl)piperazine inhibitor 31
Map dataTRPV6 in complex with (4- phenylcyclohexyl)piperazine inhibitor 31
Sample
  • Complex: sample 1
    • Protein or peptide: Transient receptor potential cation channel subfamily V member 6
  • Ligand: 5-[(4-{cis-4-[3-(trifluoromethyl)phenyl]cyclohexyl}piperazin-1-yl)methyl]pyridin-2(1H)-one
  • Ligand: CALCIUM ION
KeywordsTRPV6 / ion channel / inhibitor / MEMBRANE PROTEIN / MEMBRANE PROTEIN-INHIBITOR complex
Function / homology
Function and homology information


parathyroid hormone secretion / regulation of calcium ion-dependent exocytosis / TRP channels / calcium ion import across plasma membrane / calcium ion homeostasis / calcium channel complex / response to calcium ion / calcium ion transmembrane transport / calcium channel activity / calcium ion transport ...parathyroid hormone secretion / regulation of calcium ion-dependent exocytosis / TRP channels / calcium ion import across plasma membrane / calcium ion homeostasis / calcium channel complex / response to calcium ion / calcium ion transmembrane transport / calcium channel activity / calcium ion transport / calmodulin binding / metal ion binding / identical protein binding / plasma membrane
Similarity search - Function
Transient receptor potential cation channel subfamily V member 6 / Transient receptor potential cation channel subfamily V member 5/6 / Transient receptor potential cation channel subfamily V / Ankyrin repeat / Ankyrin repeats (3 copies) / Ankyrin repeat profile. / Ankyrin repeat region circular profile. / ankyrin repeats / Ankyrin repeat / Ankyrin repeat-containing domain superfamily ...Transient receptor potential cation channel subfamily V member 6 / Transient receptor potential cation channel subfamily V member 5/6 / Transient receptor potential cation channel subfamily V / Ankyrin repeat / Ankyrin repeats (3 copies) / Ankyrin repeat profile. / Ankyrin repeat region circular profile. / ankyrin repeats / Ankyrin repeat / Ankyrin repeat-containing domain superfamily / Ion transport domain / Ion transport protein
Similarity search - Domain/homology
Transient receptor potential cation channel subfamily V member 6
Similarity search - Component
Biological speciesHomo sapiens (human)
Methodsingle particle reconstruction / cryo EM / Resolution: 3.75 Å
AuthorsNeuberger A / Nadezhdin KD
Funding support United States, 6 items
OrganizationGrant numberCountry
National Institutes of Health/National Cancer Institute (NIH/NCI)R01 CA206573 United States
National Institutes of Health/National Institute of Neurological Disorders and Stroke (NIH/NINDS)R01 NS083660 United States
National Institutes of Health/National Institute of Neurological Disorders and Stroke (NIH/NINDS)R01 NS107253 United States
National Science Foundation (NSF, United States)1818086 United States
National Institutes of Health/National Institute of General Medical Sciences (NIH/NIGMS)GM103310 United States
National Institutes of Health/National Institute of General Medical Sciences (NIH/NIGMS)P30 GM124165 United States
CitationJournal: Sci Adv / Year: 2020
Title: Inactivation-mimicking block of the epithelial calcium channel TRPV6.
Authors: Rajesh Bhardwaj / Sonja Lindinger / Arthur Neuberger / Kirill D Nadezhdin / Appu K Singh / Micael R Cunha / Isabella Derler / Gergely Gyimesi / Jean-Louis Reymond / Matthias A Hediger / ...Authors: Rajesh Bhardwaj / Sonja Lindinger / Arthur Neuberger / Kirill D Nadezhdin / Appu K Singh / Micael R Cunha / Isabella Derler / Gergely Gyimesi / Jean-Louis Reymond / Matthias A Hediger / Christoph Romanin / Alexander I Sobolevsky /
Abstract: Epithelial calcium channel TRPV6 plays vital roles in calcium homeostasis, and its dysregulation is implicated in multifactorial diseases, including cancers. Here, we study the molecular mechanism of ...Epithelial calcium channel TRPV6 plays vital roles in calcium homeostasis, and its dysregulation is implicated in multifactorial diseases, including cancers. Here, we study the molecular mechanism of selective nanomolar-affinity TRPV6 inhibition by (4-phenylcyclohexyl)piperazine derivatives (PCHPDs). We use x-ray crystallography and cryo-electron microscopy to solve the inhibitor-bound structures of TRPV6 and identify two types of inhibitor binding sites in the transmembrane region: (i) modulatory sites between the S1-S4 and pore domains normally occupied by lipids and (ii) the main site in the ion channel pore. Our structural data combined with mutagenesis, functional and computational approaches suggest that PCHPDs plug the open pore of TRPV6 and convert the channel into a nonconducting state, mimicking the action of calmodulin, which causes inactivation of TRPV6 channels under physiological conditions. This mechanism of inhibition explains the high selectivity and potency of PCHPDs and opens up unexplored avenues for the design of future-generation biomimetic drugs.
History
DepositionSep 15, 2020-
Header (metadata) releaseDec 9, 2020-
Map releaseDec 9, 2020-
UpdateJun 4, 2025-
Current statusJun 4, 2025Processing site: RCSB / Status: Released

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Structure visualization

Movie
  • Surface view with section colored by density value
  • Surface level: 0.4
  • Imaged by UCSF Chimera
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  • Surface view colored by cylindrical radius
  • Surface level: 0.4
  • Imaged by UCSF Chimera
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  • Surface view with fitted model
  • Atomic models: PDB-7k4f
  • Surface level: 0.4
  • Imaged by UCSF Chimera
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Movie viewer
Structure viewerEM map:
SurfViewMolmilJmol/JSmol
Supplemental images

emd_22667.png

Downloads & links

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Map

FileDownload / File: emd_22667.map.gz / Format: CCP4 / Size: 64 MB / Type: IMAGE STORED AS FLOATING POINT NUMBER (4 BYTES)
AnnotationTRPV6 in complex with (4- phenylcyclohexyl)piperazine inhibitor 31
Projections & slices

Image control

Size
Brightness
Contrast
Others
AxesZ (Sec.)Y (Row.)X (Col.)
0.84 Å/pix.
x 256 pix.
= 216.064 Å		0.84 Å/pix.
x 256 pix.
= 216.064 Å		0.84 Å/pix.
x 256 pix.
= 216.064 Å

Surface

Projections

Slices (1/3)

Slices (1/2)

Slices (2/3)

Images are generated by Spider.

Voxel sizeX=Y=Z: 0.844 Å
Density

Histogram

Histogram (log scale)
Contour LevelBy AUTHOR: 0.4 / Movie #1: 0.4
Minimum - Maximum-1.1926467 - 1.6568849
Average (Standard dev.)0.010725868 (±0.091334045)
SymmetrySpace group: 1
Details

EMDB XML:

Map geometry
Axis orderXYZ
Origin000
Dimensions256256256
Spacing256256256
CellA=B=C: 216.064 Å
α=β=γ: 90.0 °

CCP4 map header:

modeImage stored as Reals
Å/pix. X/Y/Z0.8440.8440.844
M x/y/z256256256
origin x/y/z0.0000.0000.000
length x/y/z216.064216.064216.064
α/β/γ90.00090.00090.000
start NX/NY/NZ937643
NX/NY/NZ114126230
MAP C/R/S123
start NC/NR/NS000
NC/NR/NS256256256
D min/max/mean-1.1931.6570.011

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Supplemental data

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Sample components

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Entire : sample 1

EntireName: sample 1
Components
  • Complex: sample 1
    • Protein or peptide: Transient receptor potential cation channel subfamily V member 6
  • Ligand: 5-[(4-{cis-4-[3-(trifluoromethyl)phenyl]cyclohexyl}piperazin-1-yl)methyl]pyridin-2(1H)-one
  • Ligand: CALCIUM ION

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Supramolecule #1: sample 1

SupramoleculeName: sample 1 / type: complex / ID: 1 / Parent: 0 / Macromolecule list: #1
Source (natural)Organism: Homo sapiens (human)

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Macromolecule #1: Transient receptor potential cation channel subfamily V member 6

MacromoleculeName: Transient receptor potential cation channel subfamily V member 6
type: protein_or_peptide / ID: 1 / Number of copies: 4 / Enantiomer: LEVO
Source (natural)Organism: Homo sapiens (human)
Molecular weightTheoretical: 77.021805 KDa
Recombinant expressionOrganism: Homo sapiens (human)
SequenceString: MGLSLPKEKG LILCLWSKFC RWFQRRESWA QSRDEQNLLQ QKRIWESPLL LAAKDNDVQA LNKLLKYEDC KVHQRGAMGE TALHIAALY DNLEAAMVLM EAAPELVFEP MTSELYEGQT ALHIAVVNQN MNLVRALLAR RASVSARATG TAFRRSPCNL I YFGEHPLS ...String:
MGLSLPKEKG LILCLWSKFC RWFQRRESWA QSRDEQNLLQ QKRIWESPLL LAAKDNDVQA LNKLLKYEDC KVHQRGAMGE TALHIAALY DNLEAAMVLM EAAPELVFEP MTSELYEGQT ALHIAVVNQN MNLVRALLAR RASVSARATG TAFRRSPCNL I YFGEHPLS FAACVNSEEI VRLLIEHGAD IRAQDSLGNT VLHILILQPN KTFACQMYNL LLSYDRHGDH LQPLDLVPNH QG LTPFKLA GVEGNTVMFQ HLMQKRKHTQ WTYGPLTSTL YDLTEIDSSG DEQSLLELII TTKKREARQI LDQTPVKELV SLK WKRYGR PYFCMLGAIY LLYIICFTMC CIYRPLKPRT NNRTSPRDNT LLQQKLLQEA YMTPKDDIRL VGELVTVIGA IIIL LVEVP DIFRMGVTRF FGQTILGGPF HVLIITYAFM VLVTMVMRLI SASGEVVPMS FALVLGWCNV MYFARGFQML GPFTI MIQK MIFGDLMRFC WLMAVVILGF ASAFYIIFQT EDPEELGHFY DYPMALFSTF ELFLTIIDGP ANYNVDLPFM YSITYA AFA IIATLLMLNL LIAMMGDTHW RVAHERDELW RAQIVATTVM LERKLPRCLW PRSGICGREY GLGDRWFLRV EDRQDLN RQ RIQRYAQAFH TRGSEDLDKD SVEKLVPR

UniProtKB: Transient receptor potential cation channel subfamily V member 6

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Macromolecule #2: 5-[(4-{cis-4-[3-(trifluoromethyl)phenyl]cyclohexyl}piperazin-1-yl...

MacromoleculeName: 5-[(4-{cis-4-[3-(trifluoromethyl)phenyl]cyclohexyl}piperazin-1-yl)methyl]pyridin-2(1H)-one
type: ligand / ID: 2 / Number of copies: 5 / Formula: 5GK
Molecular weightTheoretical: 419.483 Da
Chemical component information

ChemComp-5GK:
5-[(4-{cis-4-[3-(trifluoromethyl)phenyl]cyclohexyl}piperazin-1-yl)methyl]pyridin-2(1H)-one

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Macromolecule #3: CALCIUM ION

MacromoleculeName: CALCIUM ION / type: ligand / ID: 3 / Number of copies: 1 / Formula: CA
Molecular weightTheoretical: 40.078 Da

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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

Concentration3 mg/mL
BufferpH: 8
Component:
ConcentrationFormulaName
150.0 mMNaClsodium chloride
20.0 mMtris(hydroxymethyl)aminomethane
0.01 %glyco-diosgenin (GDN)
0.001 %Cholesteryl hemisuccinate
1.0 mM(4- phenylcyclohexyl)piperazine inhibitor 31
GridModel: C-flat-1.2/1.3 / Material: GOLD / Mesh: 200
VitrificationCryogen name: ETHANE / Chamber humidity: 100 % / Chamber temperature: 277 K / Instrument: FEI VITROBOT MARK IV

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Electron microscopy

MicroscopeTFS KRIOS
Image recordingFilm or detector model: GATAN K3 (6k x 4k) / Digitization - Dimensions - Width: 5760 pixel / Digitization - Dimensions - Height: 4092 pixel / Number grids imaged: 1 / Number real images: 6270 / Average exposure time: 2.5 sec. / Average electron dose: 58.0 e/Å2
Electron beamAcceleration voltage: 300 kV / Electron source: FIELD EMISSION GUN
Electron opticsIllumination mode: FLOOD BEAM / Imaging mode: BRIGHT FIELD
Experimental equipment
Model: Titan Krios / Image courtesy: FEI Company

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Image processing

Particle selectionNumber selected: 829881
CTF correctionSoftware - Name: cryoSPARC (ver. 2.14) / Type: NONE
Startup modelType of model: OTHER
Final reconstructionResolution.type: BY AUTHOR / Resolution: 3.75 Å / Resolution method: FSC 0.143 CUT-OFF / Number images used: 137828
Initial angle assignmentType: NOT APPLICABLE
Final angle assignmentType: NOT APPLICABLE

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