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- PDB-6cq8: K2P2.1(TREK-1):ML335 complex -

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Basic information

Entry
Database: PDB / ID: 6cq8
TitleK2P2.1(TREK-1):ML335 complex
ComponentsPotassium channel subfamily K member 2
KeywordsTRANSPORT PROTEIN / TREK-1 ion channel K2P
Function / homology
Function and homology information


TWIK related potassium channel (TREK) / Phase 4 - resting membrane potential / positive regulation of cellular response to hypoxia / cardiac ventricle development / stabilization of membrane potential / potassium ion leak channel activity / negative regulation of cardiac muscle cell proliferation / astrocyte projection / potassium channel inhibitor activity / outward rectifier potassium channel activity ...TWIK related potassium channel (TREK) / Phase 4 - resting membrane potential / positive regulation of cellular response to hypoxia / cardiac ventricle development / stabilization of membrane potential / potassium ion leak channel activity / negative regulation of cardiac muscle cell proliferation / astrocyte projection / potassium channel inhibitor activity / outward rectifier potassium channel activity / negative regulation of DNA biosynthetic process / cochlea development / voltage-gated potassium channel activity / calyx of Held / response to axon injury / voltage-gated potassium channel complex / axon terminus / response to mechanical stimulus / potassium ion transmembrane transport / regulation of membrane potential / potassium ion transport / memory / cellular response to hypoxia / G protein-coupled receptor signaling pathway / apical plasma membrane / axon / neuronal cell body / cell surface / endoplasmic reticulum / plasma membrane
Similarity search - Function
Two pore domain potassium channel, TREK / Two pore domain potassium channel / Helix Hairpins - #70 / Potassium channel domain / Ion channel / Helix Hairpins / Orthogonal Bundle / Mainly Alpha
Similarity search - Domain/homology
Chem-16C / : / : / Chem-Q6F / HEXADECANE / Potassium channel subfamily K member 2
Similarity search - Component
Biological speciesMus musculus (house mouse)
MethodX-RAY DIFFRACTION / SYNCHROTRON / MOLECULAR REPLACEMENT / Resolution: 3 Å
AuthorsLolicato, M. / Minor, D.L.
Funding support United States, 2items
OrganizationGrant numberCountry
National Institutes of Health/National Institute of Mental Health (NIH/NIMH) United States
American Heart Association United States
CitationJournal: Nature / Year: 2017
Title: K2P2.1 (TREK-1)-activator complexes reveal a cryptic selectivity filter binding site.
Authors: Lolicato, M. / Arrigoni, C. / Mori, T. / Sekioka, Y. / Bryant, C. / Clark, K.A. / Minor, D.L.
History
DepositionMar 14, 2018Deposition site: RCSB / Processing site: RCSB
SupersessionMar 28, 2018ID: 5VKN
Revision 1.0Mar 28, 2018Provider: repository / Type: Initial release
Revision 1.1Feb 20, 2019Group: Author supporting evidence / Data collection / Category: pdbx_audit_support / Item: _pdbx_audit_support.funding_organization
Revision 1.2Nov 6, 2019Group: Author supporting evidence / Data collection / Database references
Category: pdbx_audit_support / struct_ref_seq_dif / Item: _struct_ref_seq_dif.details
Revision 1.3Nov 27, 2019Group: Author supporting evidence / Category: pdbx_audit_support / Item: _pdbx_audit_support.funding_organization
Revision 1.4Oct 4, 2023Group: Data collection / Database references ...Data collection / Database references / Derived calculations / Refinement description / Structure summary
Category: chem_comp / chem_comp_atom ...chem_comp / chem_comp_atom / chem_comp_bond / database_2 / pdbx_initial_refinement_model / struct_conn
Item: _chem_comp.pdbx_synonyms / _database_2.pdbx_DOI ..._chem_comp.pdbx_synonyms / _database_2.pdbx_DOI / _database_2.pdbx_database_accession / _struct_conn.pdbx_dist_value / _struct_conn.ptnr1_auth_asym_id / _struct_conn.ptnr1_auth_comp_id / _struct_conn.ptnr1_auth_seq_id / _struct_conn.ptnr1_label_asym_id / _struct_conn.ptnr1_label_atom_id / _struct_conn.ptnr1_label_comp_id / _struct_conn.ptnr1_label_seq_id / _struct_conn.ptnr2_auth_asym_id / _struct_conn.ptnr2_auth_comp_id / _struct_conn.ptnr2_auth_seq_id / _struct_conn.ptnr2_label_asym_id / _struct_conn.ptnr2_label_atom_id / _struct_conn.ptnr2_label_comp_id / _struct_conn.ptnr2_label_seq_id

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Structure visualization

Structure viewerMolecule:
MolmilJmol/JSmol

Downloads & links

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Assembly

Deposited unit
A: Potassium channel subfamily K member 2
B: Potassium channel subfamily K member 2
hetero molecules


Theoretical massNumber of molelcules
Total (without water)72,72924
Polymers68,6082
Non-polymers4,12122
Water0
1


  • Idetical with deposited unit
  • defined by author&software
TypeNameSymmetry operationNumber
identity operation1_555x,y,z1
Buried area15470 Å2
ΔGint-171 kcal/mol
Surface area31190 Å2
MethodPISA
Unit cell
Length a, b, c (Å)67.074, 119.386, 128.179
Angle α, β, γ (deg.)90.00, 90.00, 90.00
Int Tables number19
Space group name H-MP212121
Noncrystallographic symmetry (NCS)NCS domain:
IDEns-ID
11
21

NCS domain segments:
Dom-IDComponent-IDEns-IDSelection details
111(chain A and (resid 37 through 38 or resid 40...
211(chain B and (resid 37 through 38 or resid 40...

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Components

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Protein , 1 types, 2 molecules AB

#1: Protein Potassium channel subfamily K member 2 / Outward rectifying potassium channel protein TREK-1 / TREK-1 K(+) channel subunit / Two pore ...Outward rectifying potassium channel protein TREK-1 / TREK-1 K(+) channel subunit / Two pore potassium channel TPKC1


Mass: 34303.938 Da / Num. of mol.: 2
Mutation: K84R, Q85E, T86K, I88L, A89R, Q90A, A92P, N95S, S96D, T97Q, N119A, S300A, E306A
Source method: isolated from a genetically manipulated source
Source: (gene. exp.) Mus musculus (house mouse) / Gene: Kcnk2 / Production host: Komagataella pastoris (fungus) / References: UniProt: P97438

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Non-polymers , 5 types, 22 molecules

#2: Chemical
ChemComp-K / POTASSIUM ION


Mass: 39.098 Da / Num. of mol.: 6 / Source method: obtained synthetically / Formula: K
#3: Chemical
ChemComp-R16 / HEXADECANE / Hexadecane


Mass: 226.441 Da / Num. of mol.: 10 / Source method: obtained synthetically / Formula: C16H34
#4: Chemical ChemComp-Q6F / N-[(2,4-dichlorophenyl)methyl]-4-[(methylsulfonyl)amino]benzamide


Mass: 373.254 Da / Num. of mol.: 2 / Source method: obtained synthetically / Formula: C15H14Cl2N2O3S
#5: Chemical ChemComp-16C / N-((E,2S,3R)-1,3-DIHYDROXYOCTADEC-4-EN-2-YL)PALMITAMIDE / C16-CERAMIDE / N-PALMITOYL-D-ERYTHRO-SPHINGOSINE / (2S,3R,4E)-2-PALMITOYLAMINOOCTADEC-4-ENE-1,3-DIOL / (2S,3R,4E)-2-PALMITOYLAMINO-1,3-OCTADEC-4-ENEDIOL


Mass: 537.901 Da / Num. of mol.: 1 / Source method: obtained synthetically / Formula: C34H67NO3
#6: Chemical ChemComp-CD / CADMIUM ION


Mass: 112.411 Da / Num. of mol.: 3 / Source method: obtained synthetically / Formula: Cd

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Experimental details

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Experiment

ExperimentMethod: X-RAY DIFFRACTION / Number of used crystals: 1

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Sample preparation

CrystalDensity Matthews: 3.74 Å3/Da / Density % sol: 67.11 %
Crystal growTemperature: 277 K / Method: vapor diffusion, hanging drop / pH: 8
Details: 20-25% PEG400 200mM KCl 1mM CdCl 100mM HEPES, pH=8.0

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Data collection

DiffractionMean temperature: 100 K
Diffraction sourceSource: SYNCHROTRON / Site: APS / Beamline: 23-ID-D / Wavelength: 1.0332 Å
DetectorType: DECTRIS PILATUS 6M / Detector: PIXEL / Date: Jun 21, 2016
RadiationProtocol: SINGLE WAVELENGTH / Monochromatic (M) / Laue (L): M / Scattering type: x-ray
Radiation wavelengthWavelength: 1.0332 Å / Relative weight: 1
ReflectionResolution: 3→15 Å / Num. obs: 21069 / % possible obs: 97 % / Redundancy: 12.9 % / Rmerge(I) obs: 0.237 / Net I/σ(I): 0.6
Reflection shellResolution: 3→3.11 Å / Rmerge(I) obs: 0.171 / Num. unique obs: 2724

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Processing

Software
NameVersionClassification
PHENIX(1.11.1_2575: ???)refinement
Cootmodel building
Aimlessdata scaling
PHASERphasing
XDSdata processing
XDSdata reduction
RefinementMethod to determine structure: MOLECULAR REPLACEMENT
Starting model: 4RUE

4rue


Resolution: 3→14.953 Å / SU ML: 0.55 / Cross valid method: FREE R-VALUE / σ(F): 1.33 / Phase error: 33.55
RfactorNum. reflection% reflection
Rfree0.2767 1003 4.85 %
Rwork0.2565 --
obs0.2575 20687 98.16 %
Solvent computationShrinkage radii: 0.9 Å / VDW probe radii: 1.11 Å
Refinement stepCycle: LAST / Resolution: 3→14.953 Å
ProteinNucleic acidLigandSolventTotal
Num. atoms4349 0 200 0 4549
Refine LS restraints
Refine-IDTypeDev idealNumber
X-RAY DIFFRACTIONf_bond_d0.0064648
X-RAY DIFFRACTIONf_angle_d0.976270
X-RAY DIFFRACTIONf_dihedral_angle_d6.9443118
X-RAY DIFFRACTIONf_chiral_restr0.045720
X-RAY DIFFRACTIONf_plane_restr0.005747
Refine LS restraints NCS
Ens-IDDom-IDAuth asym-IDNumberRefine-IDTypeRms dev position (Å)
11A1901X-RAY DIFFRACTIONPOSITIONAL
12B1901X-RAY DIFFRACTIONPOSITIONAL1.16
LS refinement shell
Resolution (Å)Rfactor RfreeNum. reflection RfreeRfactor RworkNum. reflection RworkRefine-ID% reflection obs (%)
3-3.15680.38431390.37782725X-RAY DIFFRACTION97
3.1568-3.35250.40081430.35362783X-RAY DIFFRACTION98
3.3525-3.6080.33191300.3092805X-RAY DIFFRACTION99
3.608-3.96490.2881670.25682753X-RAY DIFFRACTION98
3.9649-4.52470.26761310.2282839X-RAY DIFFRACTION99
4.5247-5.6490.26521260.2352890X-RAY DIFFRACTION99
5.649-14.95350.23681670.2342889X-RAY DIFFRACTION97

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