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- PDB-9g71: Cryo-EM structure of TTYH2 in complex with lipids in GDN -

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Basic information

Entry
Database: PDB / ID: 9g71
TitleCryo-EM structure of TTYH2 in complex with lipids in GDN
ComponentsProtein tweety homolog 2
KeywordsMEMBRANE PROTEIN / complex / sybody / nanobody / TTYH2
Function / homology
Function and homology information


volume-sensitive chloride channel activity / L-glutamate transmembrane transport / intracellularly calcium-gated chloride channel activity / chloride channel complex / Stimuli-sensing channels / calcium ion binding / plasma membrane
Similarity search - Function
CHOLESTEROL / Chem-CPL / DIUNDECYL PHOSPHATIDYL CHOLINE / Protein tweety homolog 2
Similarity search - Component
Biological speciesHomo sapiens (human)
MethodELECTRON MICROSCOPY / single particle reconstruction / cryo EM / Resolution: 2.74 Å
AuthorsSukalskaia, A. / Weber, F. / Plochberger, B. / Dutzler, R.
Funding support Switzerland, 1items
OrganizationGrant numberCountry
Swiss National Science Foundation Switzerland
CitationJournal: To Be Published
Title: TTYH2 with lipids in GDN
Authors: Sukalskaia, A. / Weber, F. / Plochberger, B. / Dutzler, R.
History
DepositionJul 19, 2024Deposition site: PDBE / Processing site: PDBE
Revision 1.0May 21, 2025Provider: repository / Type: Initial release
Revision 1.0May 21, 2025Data content type: EM metadata / Data content type: EM metadata / Provider: repository / Type: Initial release
Revision 1.0May 21, 2025Data content type: Half map / Part number: 1 / Data content type: Half map / Provider: repository / Type: Initial release
Revision 1.0May 21, 2025Data content type: Half map / Part number: 2 / Data content type: Half map / Provider: repository / Type: Initial release
Revision 1.0May 21, 2025Data content type: Image / Data content type: Image / Provider: repository / Type: Initial release
Revision 1.0May 21, 2025Data content type: Primary map / Data content type: Primary map / Provider: repository / Type: Initial release
Revision 1.1Jun 11, 2025Group: Data collection / Structure summary / Category: em_admin / struct
Item: _em_admin.last_update / _em_admin.title / _struct.title
Revision 2.0Jun 11, 2025Data content type: EM metadata / Data content type: EM metadata / Group: Experimental summary / Data content type: EM metadata / Category: em_admin / Data content type: EM metadata / EM metadata / Item: _em_admin.last_update / _em_admin.title

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Structure visualization

Structure viewerMolecule:
MolmilJmol/JSmol

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Assembly

Deposited unit
A: Protein tweety homolog 2
B: Protein tweety homolog 2
hetero molecules


Theoretical massNumber of molelcules
Total (without water)149,76536
Polymers132,0002
Non-polymers17,76534
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

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Protein , 1 types, 2 molecules AB

#1: Protein Protein tweety homolog 2 / hTTY2 / Volume-regulated anion channel subunit TTYH2


Mass: 66000.039 Da / Num. of mol.: 2
Source method: isolated from a genetically manipulated source
Source: (gene. exp.) Homo sapiens (human) / Gene: TTYH2, C17orf29 / Production host: Homo sapiens (human) / References: UniProt: Q9BSA4

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Sugars , 2 types, 8 molecules

#2: Polysaccharide
2-acetamido-2-deoxy-beta-D-glucopyranose-(1-4)-2-acetamido-2-deoxy-beta-D-glucopyranose


Type: oligosaccharide / Mass: 424.401 Da / Num. of mol.: 4
Source method: isolated from a genetically manipulated source
DescriptorTypeProgram
DGlcpNAcb1-4DGlcpNAcb1-ROHGlycam Condensed SequenceGMML 1.0
WURCS=2.0/1,2,1/[a2122h-1b_1-5_2*NCC/3=O]/1-1/a4-b1WURCSPDB2Glycan 1.1.0
[][D-1-deoxy-GlcpNAc]{[(4+1)][b-D-GlcpNAc]{}}LINUCSPDB-CARE
#3: 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.: 4 / Source method: obtained synthetically / Formula: C8H15NO6 / Feature type: SUBJECT OF INVESTIGATION
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

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Non-polymers , 3 types, 26 molecules

#4: Chemical
ChemComp-PLC / DIUNDECYL PHOSPHATIDYL CHOLINE


Mass: 622.834 Da / Num. of mol.: 17 / Source method: obtained synthetically / Formula: C32H65NO8P / Feature type: SUBJECT OF INVESTIGATION / Comment: phospholipid*YM
#5: Chemical
ChemComp-CLR / CHOLESTEROL


Mass: 386.654 Da / Num. of mol.: 6 / Source method: obtained synthetically / Formula: C27H46O / Feature type: SUBJECT OF INVESTIGATION
#6: Chemical ChemComp-CPL / 1-PALMITOYL-2-LINOLEOYL-SN-GLYCERO-3-PHOSPHOCHOLINE / PALMITOYL-LINOLEOYL PHOSPHATIDYLCHOLINE


Mass: 758.060 Da / Num. of mol.: 3 / Source method: obtained synthetically / Formula: C42H80NO8P / Feature type: SUBJECT OF INVESTIGATION / Comment: phospholipid*YM

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Details

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: TTYH2 purified in GDN with lipids / Type: COMPLEX / Entity ID: #1 / Source: RECOMBINANT
Molecular weightValue: 0.066 MDa / Experimental value: NO
Source (natural)Organism: Homo sapiens (human)
Source (recombinant)Organism: Homo sapiens (human)
Buffer solutionpH: 7.4
Buffer component
IDConc.NameFormulaBuffer-ID
1200 mMsodium chlorideNaCl1
210 mMhepesHEPES1
350 uMglycodiosgeninGDN1
SpecimenEmbedding applied: NO / Shadowing applied: NO / Staining applied: NO / Vitrification applied: YES
VitrificationCryogen name: ETHANE-PROPANE / Humidity: 100 %

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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: SPOT SCAN
Electron lensMode: BRIGHT FIELD / Nominal defocus max: 2400 nm / Nominal defocus min: 1000 nm / C2 aperture diameter: 50 µm
Image recordingElectron dose: 63 e/Å2 / Film or detector model: GATAN K3 BIOCONTINUUM (6k x 4k)

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Processing

EM softwareName: PHENIX / Version: 1.21.1_5286 / Category: model refinement
CTF correctionType: PHASE FLIPPING AND AMPLITUDE CORRECTION
3D reconstructionResolution: 2.74 Å / Resolution method: FSC 0.143 CUT-OFF / Num. of particles: 2192921 / Symmetry type: POINT
RefinementCross valid method: NONE
Stereochemistry target values: GeoStd + Monomer Library + CDL v1.2
Displacement parametersBiso mean: 69.62 Å2
Refine LS restraints
Refine-IDTypeDev idealNumber
ELECTRON MICROSCOPYf_bond_d0.00377446
ELECTRON MICROSCOPYf_angle_d0.451210032
ELECTRON MICROSCOPYf_chiral_restr0.03471144
ELECTRON MICROSCOPYf_plane_restr0.00321104
ELECTRON MICROSCOPYf_dihedral_angle_d17.43752043

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