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- PDB-4pdv: Structure of K+ selective NaK mutant in barium and potassium -

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Basic information

Entry
Database: PDB / ID: 4pdv
TitleStructure of K+ selective NaK mutant in barium and potassium
ComponentsPotassium channel protein
KeywordsTRANSPORT PROTEIN / Bacillus cereus / Binding Sites / Electrophysiology / Ions / Potassium / Potassium Channels / Sodium / barium / blockage
Function / homology
Function and homology information


stabilization of membrane potential / potassium ion leak channel activity / outward rectifier potassium channel activity / membrane / identical protein binding / metal ion binding
Similarity search - Function
Two pore domain potassium channel / Helix Hairpins - #70 / Potassium channel domain / Ion channel / Helix Hairpins / Orthogonal Bundle / Mainly Alpha
Similarity search - Domain/homology
: / : / Potassium channel protein
Similarity search - Component
Biological speciesBacillus cereus (bacteria)
MethodX-RAY DIFFRACTION / SYNCHROTRON / MOLECULAR REPLACEMENT / Resolution: 1.821 Å
AuthorsLam, Y. / Zeng, W. / Sauer, D.B. / Jiang, Y.
Funding support United States, 3items
OrganizationGrant numberCountry
Howard Hughes Medical Institute (HHMI) United States
National Institutes of Health/National Institute of General Medical Sciences (NIH/NIGMS)GM079179 United States
Welch FoundationGrant I-1578 United States
CitationJournal: To Be Published
Title: High Resolution Structural Views of Rubidium, Cesium and Barium Binding within a Potassium Selective Channel Filter
Authors: Lam, Y. / Zeng, W. / Sauer, D.B. / Jiang, Y.
History
DepositionApr 22, 2014Deposition site: RCSB / Processing site: RCSB
Revision 1.0Jul 9, 2014Provider: repository / Type: Initial release
Revision 1.1Sep 27, 2017Group: Advisory / Author supporting evidence ...Advisory / Author supporting evidence / Database references / Derived calculations / Other / Source and taxonomy
Category: citation / entity_src_gen ...citation / entity_src_gen / pdbx_audit_support / pdbx_database_status / pdbx_struct_assembly / pdbx_struct_conn_angle / pdbx_struct_oper_list / pdbx_validate_close_contact
Item: _citation.journal_id_CSD / _entity_src_gen.pdbx_alt_source_flag ..._citation.journal_id_CSD / _entity_src_gen.pdbx_alt_source_flag / _pdbx_audit_support.funding_organization / _pdbx_database_status.pdb_format_compatible / _pdbx_struct_assembly.oligomeric_details / _pdbx_struct_oper_list.symmetry_operation
Revision 1.2Nov 20, 2019Group: Author supporting evidence / Category: pdbx_audit_support / Item: _pdbx_audit_support.funding_organization
Revision 1.3Sep 27, 2023Group: Data collection / Database references ...Data collection / Database references / Derived calculations / Refinement description
Category: chem_comp_atom / chem_comp_bond ...chem_comp_atom / chem_comp_bond / database_2 / pdbx_initial_refinement_model / pdbx_struct_conn_angle / refine_hist / struct_conn
Item: _database_2.pdbx_DOI / _database_2.pdbx_database_accession ..._database_2.pdbx_DOI / _database_2.pdbx_database_accession / _pdbx_struct_conn_angle.ptnr1_auth_asym_id / _pdbx_struct_conn_angle.ptnr1_auth_comp_id / _pdbx_struct_conn_angle.ptnr1_auth_seq_id / _pdbx_struct_conn_angle.ptnr1_label_asym_id / _pdbx_struct_conn_angle.ptnr1_label_atom_id / _pdbx_struct_conn_angle.ptnr1_label_comp_id / _pdbx_struct_conn_angle.ptnr1_label_seq_id / _pdbx_struct_conn_angle.ptnr1_symmetry / _pdbx_struct_conn_angle.ptnr2_auth_asym_id / _pdbx_struct_conn_angle.ptnr2_auth_comp_id / _pdbx_struct_conn_angle.ptnr2_auth_seq_id / _pdbx_struct_conn_angle.ptnr2_label_asym_id / _pdbx_struct_conn_angle.ptnr2_label_atom_id / _pdbx_struct_conn_angle.ptnr2_label_comp_id / _pdbx_struct_conn_angle.ptnr3_auth_asym_id / _pdbx_struct_conn_angle.ptnr3_auth_comp_id / _pdbx_struct_conn_angle.ptnr3_auth_seq_id / _pdbx_struct_conn_angle.ptnr3_label_asym_id / _pdbx_struct_conn_angle.ptnr3_label_atom_id / _pdbx_struct_conn_angle.ptnr3_label_comp_id / _pdbx_struct_conn_angle.ptnr3_label_seq_id / _pdbx_struct_conn_angle.ptnr3_symmetry / _pdbx_struct_conn_angle.value / _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_symmetry

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Structure visualization

Structure viewerMolecule:
MolmilJmol/JSmol

Downloads & links

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Assembly

Deposited unit
A: Potassium channel protein
B: Potassium channel protein
hetero molecules


Theoretical massNumber of molelcules
Total (without water)22,66315
Polymers21,5432
Non-polymers1,11913
Water1,13563
1
A: Potassium channel protein
hetero molecules

A: Potassium channel protein
hetero molecules

A: Potassium channel protein
hetero molecules

A: Potassium channel protein
hetero molecules


Theoretical massNumber of molelcules
Total (without water)45,60032
Polymers43,0874
Non-polymers2,51328
Water724
TypeNameSymmetry operationNumber
identity operation1_555x,y,z1
crystal symmetry operation2_555-x,-y,z1
crystal symmetry operation3_555-y,x,z1
crystal symmetry operation4_555y,-x,z1
Buried area11440 Å2
ΔGint-175 kcal/mol
Surface area16420 Å2
MethodPISA
2
B: Potassium channel protein
hetero molecules

B: Potassium channel protein
hetero molecules

B: Potassium channel protein
hetero molecules

B: Potassium channel protein
hetero molecules


Theoretical massNumber of molelcules
Total (without water)45,05128
Polymers43,0874
Non-polymers1,96424
Water724
TypeNameSymmetry operationNumber
identity operation1_555x,y,z1
crystal symmetry operation2_555-x,-y,z1
crystal symmetry operation3_555-y,x,z1
crystal symmetry operation4_555y,-x,z1
Buried area12120 Å2
ΔGint-191 kcal/mol
Surface area16350 Å2
MethodPISA
Unit cell
Length a, b, c (Å)68.065, 68.065, 89.614
Angle α, β, γ (deg.)90.00, 90.00, 90.00
Int Tables number79
Space group name H-MI4
Components on special symmetry positions
IDModelComponents
11A-201-

K

21A-202-

K

31A-203-

K

41A-204-

BA

51A-205-

BA

61B-201-

K

71B-202-

K

81B-203-

K

91B-204-

BA

101A-318-

HOH

111B-313-

HOH

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Components

#1: Protein Potassium channel protein /


Mass: 10771.673 Da / Num. of mol.: 2 / Fragment: UNP residues 20-110 / Mutation: D66Y, N68D
Source method: isolated from a genetically manipulated source
Source: (gene. exp.) Bacillus cereus (bacteria) / Strain: ATCC 14579 / DSM 31 / Gene: BC_0669 / Plasmid: pQE60 / Production host: Escherichia coli (E. coli) / Strain (production host): SG13009 / References: UniProt: Q81HW2
#2: Chemical
ChemComp-K / POTASSIUM ION


Mass: 39.098 Da / Num. of mol.: 6 / Source method: obtained synthetically / Formula: K
#3: Chemical ChemComp-BA / BARIUM ION


Mass: 137.327 Da / Num. of mol.: 3 / Source method: obtained synthetically / Formula: Ba
#4: Chemical
ChemComp-MPD / (4S)-2-METHYL-2,4-PENTANEDIOL / 2-Methyl-2,4-pentanediol


Mass: 118.174 Da / Num. of mol.: 4 / Source method: obtained synthetically / Formula: C6H14O2 / Comment: precipitant*YM
#5: Water ChemComp-HOH / water / Water


Mass: 18.015 Da / Num. of mol.: 63 / Source method: isolated from a natural source / Formula: H2O

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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: 2.41 Å3/Da / Density % sol: 48.94 %
Crystal growTemperature: 293 K / Method: vapor diffusion, sitting drop / pH: 6
Details: 65%MPD, 100mM KCl, 100mM MES, 4mM n-Decyl-beta-D-Maltoside
PH range: 6.0-7.5

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Data collection

DiffractionMean temperature: 78 K
Diffraction sourceSource: SYNCHROTRON / Site: ALS / Beamline: 8.2.2 / Wavelength: 0.9793 Å
DetectorType: ADSC QUANTUM 315 / Detector: CCD / Date: Jun 9, 2009
RadiationProtocol: SINGLE WAVELENGTH / Monochromatic (M) / Laue (L): M / Scattering type: x-ray
Radiation wavelengthWavelength: 0.9793 Å / Relative weight: 1
ReflectionResolution: 1.821→50 Å / Num. obs: 128478 / % possible obs: 99.53 % / Redundancy: 7.1 % / Net I/σ(I): 37
Reflection shellRedundancy: 7.2 % / % possible all: 100

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Processing

SoftwareName: PHENIX / Version: (phenix.refine: 1.8.4_1496) / Classification: refinement
RefinementMethod to determine structure: MOLECULAR REPLACEMENT
Starting model: 3OUF

3ouf


Resolution: 1.821→32.795 Å / SU ML: 0.2 / Cross valid method: FREE R-VALUE / σ(F): 1.37 / Phase error: 25.46 / Stereochemistry target values: ML
RfactorNum. reflection% reflection
Rfree0.2324 929 5.1 %
Rwork0.1972 --
obs0.1988 18202 99.51 %
Solvent computationShrinkage radii: 0.9 Å / VDW probe radii: 1.11 Å / Solvent model: FLAT BULK SOLVENT MODEL
Refinement stepCycle: LAST / Resolution: 1.821→32.795 Å
ProteinNucleic acidLigandSolventTotal
Num. atoms1485 0 41 63 1589
Refine LS restraints
Refine-IDTypeDev idealNumber
X-RAY DIFFRACTIONf_bond_d0.0081549
X-RAY DIFFRACTIONf_angle_d1.22114
X-RAY DIFFRACTIONf_dihedral_angle_d15.818530
X-RAY DIFFRACTIONf_chiral_restr0.047263
X-RAY DIFFRACTIONf_plane_restr0.007250
LS refinement shell
Resolution (Å)Rfactor RfreeNum. reflection RfreeRfactor RworkNum. reflection RworkRefine-ID% reflection obs (%)
1.821-1.91690.34151290.27072466X-RAY DIFFRACTION100
1.9169-2.0370.28861520.23942456X-RAY DIFFRACTION100
2.037-2.19420.29151410.22262478X-RAY DIFFRACTION100
2.1942-2.4150.26411270.20962458X-RAY DIFFRACTION100
2.415-2.76430.21041370.18662459X-RAY DIFFRACTION100
2.7643-3.4820.21871260.19122495X-RAY DIFFRACTION100
3.482-32.80030.20261170.18492461X-RAY DIFFRACTION97

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