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- EMDB-34214: human TMEM63A -

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Basic information

Entry
Database: EMDB / ID: EMD-34214
Titlehuman TMEM63A
Map data
Sample
  • Complex: human TMEM63A
    • Protein or peptide: CSC1-like protein 1
  • Ligand: (2S)-3-(hexadecanoyloxy)-2-[(9Z)-octadec-9-enoyloxy]propyl 2-(trimethylammonio)ethyl phosphate
Keywordschannel / MEMBRANE PROTEIN
Function / homology
Function and homology information


surfactant secretion / osmolarity-sensing monoatomic cation channel activity / mechanosensitive monoatomic ion channel activity / calcium-activated cation channel activity / tertiary granule membrane / centriolar satellite / specific granule membrane / early endosome membrane / nucleic acid binding / lysosomal membrane ...surfactant secretion / osmolarity-sensing monoatomic cation channel activity / mechanosensitive monoatomic ion channel activity / calcium-activated cation channel activity / tertiary granule membrane / centriolar satellite / specific granule membrane / early endosome membrane / nucleic acid binding / lysosomal membrane / intracellular membrane-bounded organelle / Neutrophil degranulation / extracellular exosome / plasma membrane
Similarity search - Function
CSC1/OSCA1-like, 7TM region / CSC1/OSCA1-like, cytosolic domain / CSC1/OSCA1-like, N-terminal transmembrane domain / Calcium permeable stress-gated cation channel 1-like / Calcium-dependent channel, 7TM region, putative phosphate / Late exocytosis, associated with Golgi transport / Cytosolic domain of 10TM putative phosphate transporter / RNA-binding domain superfamily / Nucleotide-binding alpha-beta plait domain superfamily
Similarity search - Domain/homology
Biological speciesHomo sapiens (human)
Methodsingle particle reconstruction / cryo EM / Resolution: 3.3 Å
AuthorsZhang MF
Funding support1 items
OrganizationGrant numberCountry
Not funded
CitationJournal: Nat Commun / Year: 2023
Title: A mechanical-coupling mechanism in OSCA/TMEM63 channel mechanosensitivity.
Authors: Mingfeng Zhang / Yuanyue Shan / Charles D Cox / Duanqing Pei /
Abstract: Mechanosensitive (MS) ion channels are a ubiquitous type of molecular force sensor sensing forces from the surrounding bilayer. The profound structural diversity in these channels suggests that the ...Mechanosensitive (MS) ion channels are a ubiquitous type of molecular force sensor sensing forces from the surrounding bilayer. The profound structural diversity in these channels suggests that the molecular mechanisms of force sensing follow unique structural blueprints. Here we determine the structures of plant and mammalian OSCA/TMEM63 proteins, allowing us to identify essential elements for mechanotransduction and propose roles for putative bound lipids in OSCA/TMEM63 mechanosensation. Briefly, the central cavity created by the dimer interface couples each subunit and modulates dimeric OSCA/TMEM63 channel mechanosensitivity through the modulating lipids while the cytosolic side of the pore is gated by a plug lipid that prevents the ion permeation. Our results suggest that the gating mechanism of OSCA/TMEM63 channels may combine structural aspects of the 'lipid-gated' mechanism of MscS and TRAAK channels and the calcium-induced gating mechanism of the TMEM16 family, which may provide insights into the structural rearrangements of TMEM16/TMC superfamilies.
History
DepositionSep 2, 2022-
Header (metadata) releaseJun 14, 2023-
Map releaseJun 14, 2023-
UpdateJul 3, 2024-
Current statusJul 3, 2024Processing site: PDBj / Status: Released

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Structure visualization

Supplemental images

emd_34214.png

Downloads & links

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Map

FileDownload / File: emd_34214.map.gz / Format: CCP4 / Size: 125 MB / Type: IMAGE STORED AS FLOATING POINT NUMBER (4 BYTES)
Projections & slices

Image control

Size
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Contrast
Others
AxesZ (Sec.)Y (Row.)X (Col.)
0.82 Å/pix.
x 320 pix.
= 262.4 Å		0.82 Å/pix.
x 320 pix.
= 262.4 Å		0.82 Å/pix.
x 320 pix.
= 262.4 Å

Surface

Projections

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Images are generated by Spider.

Voxel sizeX=Y=Z: 0.82 Å
Density

Histogram

Histogram (log scale)
Contour LevelBy AUTHOR: 0.16
Minimum - Maximum-0.6973925 - 1.1057965
Average (Standard dev.)-0.000042949367 (±0.02081256)
SymmetrySpace group: 1
Details

EMDB XML:

Map geometry
Axis orderXYZ
Origin000
Dimensions320320320
Spacing320320320
CellA=B=C: 262.4 Å
α=β=γ: 90.0 °

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Supplemental data

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Half map: #2

Fileemd_34214_half_map_1.map
Projections & Slices
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Slices (1/2)
Density Histograms

Histogram

Histogram (log scale)

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Half map: #1

Fileemd_34214_half_map_2.map
Projections & Slices
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Sample components

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Entire : human TMEM63A

EntireName: human TMEM63A
Components
  • Complex: human TMEM63A
    • Protein or peptide: CSC1-like protein 1
  • Ligand: (2S)-3-(hexadecanoyloxy)-2-[(9Z)-octadec-9-enoyloxy]propyl 2-(trimethylammonio)ethyl phosphate

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Supramolecule #1: human TMEM63A

SupramoleculeName: human TMEM63A / type: complex / ID: 1 / Parent: 0 / Macromolecule list: #1
Source (natural)Organism: Homo sapiens (human)

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Macromolecule #1: CSC1-like protein 1

MacromoleculeName: CSC1-like protein 1 / type: protein_or_peptide / ID: 1 / Number of copies: 1 / Enantiomer: LEVO
Source (natural)Organism: Homo sapiens (human)
Molecular weightTheoretical: 92.212836 KDa
Recombinant expressionOrganism: Homo sapiens (human)
SequenceString: MMDSPFLELW QSKAVSIREQ LGLGDRPNDS YCYNSAKNST VLQGVTFGGI PTVLLIDVSC FLFLILVFSI IRRRFWDYGR IALVSEADS ESRFQRLSST SSSGQQDFEN ELGCCPWLTA IFRLHDDQIL EWCGEDAIHY LSFQRHIIFL LVVVSFLSLC V ILPVNLSG ...String:
MMDSPFLELW QSKAVSIREQ LGLGDRPNDS YCYNSAKNST VLQGVTFGGI PTVLLIDVSC FLFLILVFSI IRRRFWDYGR IALVSEADS ESRFQRLSST SSSGQQDFEN ELGCCPWLTA IFRLHDDQIL EWCGEDAIHY LSFQRHIIFL LVVVSFLSLC V ILPVNLSG DLLDKDPYSF GRTTIANLQT DNDLLWLHTI FAVIYLFLTV GFMRHHTQSI KYKEENLVRR TLFITGLPRD AR KETVESH FRDAYPTCEV VDVQLCYNVA KLIYLCKEKK KTEKSLTYYT NLQVKTGQRT LINPKPCGQF CCCEVLGCEW EDA ISYYTR MKDRLLERIT EEERHVQDQP LGMAFVTFQE KSMATYILKD FNACKCQSLQ CKGEPQPSSH SRELYTSKWT VTFA ADPED ICWKNLSIQG LRWWLQWLGI NFTLFLGLFF LTTPSIILST MDKFNVTKPI HALNNPIISQ FFPTLLLWSF SALLP SIVY YSTLLESHWT KSGENQIMMT KVYIFLIFMV LILPSLGLTS LDFFFRWLFD KTSSEASIRL ECVFLPDQGA FFVNYV IAS AFIGNGMELL RLPGLILYTF RMIMAKTAAD RRNVKQNQAF QYEFGAMYAW MLCVFTVIVA YSITCPIIAP FGLIYIL LK HMVDRHNLYF VYLPAKLEKG IHFAAVNQAL AAPILCLFWL YFFSFLRLGM KAPATLFTFL VLLLTILVCL AHTCFGCF K HLSPLNYKTE EPASDKGSEA EAHMPPPFTP YVPRILNGLA SERTALSPQQ QQQQTYGAIH NISGTIPGQC LAQSATGSV AAAPQEA

UniProtKB: CSC1-like protein 1

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Macromolecule #2: (2S)-3-(hexadecanoyloxy)-2-[(9Z)-octadec-9-enoyloxy]propyl 2-(tri...

MacromoleculeName: (2S)-3-(hexadecanoyloxy)-2-[(9Z)-octadec-9-enoyloxy]propyl 2-(trimethylammonio)ethyl phosphate
type: ligand / ID: 2 / Number of copies: 1 / Formula: POV
Molecular weightTheoretical: 760.076 Da
Chemical component information

ChemComp-POV:
(2S)-3-(hexadecanoyloxy)-2-[(9Z)-octadec-9-enoyloxy]propyl 2-(trimethylammonio)ethyl phosphate / phospholipid*YM

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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

BufferpH: 7.4
VitrificationCryogen name: ETHANE

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Electron microscopy

MicroscopeFEI TITAN KRIOS
Image recordingFilm or detector model: GATAN K3 (6k x 4k) / Average electron dose: 60.0 e/Å2
Electron beamAcceleration voltage: 300 kV / Electron source: FIELD EMISSION GUN
Electron opticsIllumination mode: SPOT SCAN / Imaging mode: BRIGHT FIELD / Nominal defocus max: 3.5 µm / Nominal defocus min: 2.5 µm
Experimental equipment
Model: Titan Krios / Image courtesy: FEI Company

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Image processing

Startup modelType of model: NONE
Final reconstructionResolution.type: BY AUTHOR / Resolution: 3.3 Å / Resolution method: FSC 0.143 CUT-OFF / Number images used: 155000
Initial angle assignmentType: NOT APPLICABLE
Final angle assignmentType: NOT APPLICABLE

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