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- PDB-3fb6: KcsA Potassium channel in the partially open state with 16 A open... -

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Basic information

Entry
Database: PDB / ID: 3fb6
TitleKcsA Potassium channel in the partially open state with 16 A opening at T112
Components
  • Voltage-gated potassium channel
  • antibody fab fragment heavy chain
  • antibody fab fragment light chain
Keywordsmembrane protein/metal transport / kcsa / open / inactivation / potassium channel / Cell membrane / Ion transport / Ionic channel / Membrane / Transmembrane / Transport / Voltage-gated channel / membrane protein-metal transport COMPLEX
Function / homology
Function and homology information


action potential / voltage-gated potassium channel activity / voltage-gated potassium channel complex / B cell differentiation / extracellular region / identical protein binding / plasma membrane
Similarity search - Function
Voltage-gated potassium channel / Helix Hairpins - #70 / Potassium channel domain / Ion channel / : / Helix Hairpins / Immunoglobulin/major histocompatibility complex, conserved site / Immunoglobulins and major histocompatibility complex proteins signature. / Immunoglobulin C-Type / Immunoglobulin C1-set ...Voltage-gated potassium channel / Helix Hairpins - #70 / Potassium channel domain / Ion channel / : / Helix Hairpins / Immunoglobulin/major histocompatibility complex, conserved site / Immunoglobulins and major histocompatibility complex proteins signature. / Immunoglobulin C-Type / Immunoglobulin C1-set / Immunoglobulin C1-set domain / Ig-like domain profile. / Immunoglobulin-like domain / Immunoglobulin-like domain superfamily / Immunoglobulin-like fold / Immunoglobulins / Immunoglobulin-like / Sandwich / Orthogonal Bundle / Mainly Beta / Mainly Alpha
Similarity search - Domain/homology
: / Immunoglobulin kappa constant / pH-gated potassium channel KcsA
Similarity search - Component
Biological speciesStreptomyces lividans (bacteria)
Mus musculus (house mouse)
MethodX-RAY DIFFRACTION / SYNCHROTRON / MOLECULAR REPLACEMENT / Resolution: 3 Å
AuthorsCuello, L.G. / Jogini, V. / Cortes, D.M. / Perozo, E.
CitationJournal: TO BE PUBLISHED
Title: KcsA Potassium channel in the partially open state with 16 A opening at T112
Authors: Cuello, L.G. / Jogini, V. / Cortes, D.M. / Perozo, E.
History
DepositionNov 18, 2008Deposition site: RCSB / Processing site: RCSB
Revision 1.0May 19, 2010Provider: repository / Type: Initial release
Revision 1.1Jul 13, 2011Group: Version format compliance
Revision 1.2Oct 20, 2021Group: Database references / Derived calculations
Category: database_2 / pdbx_struct_conn_angle ...database_2 / pdbx_struct_conn_angle / struct_conn / struct_ref_seq_dif / struct_site
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_comp_id / _pdbx_struct_conn_angle.ptnr1_auth_seq_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.ptnr2_auth_seq_id / _pdbx_struct_conn_angle.ptnr2_label_asym_id / _pdbx_struct_conn_angle.ptnr3_auth_comp_id / _pdbx_struct_conn_angle.ptnr3_auth_seq_id / _pdbx_struct_conn_angle.ptnr3_label_comp_id / _pdbx_struct_conn_angle.ptnr3_label_seq_id / _pdbx_struct_conn_angle.value / _struct_conn.pdbx_dist_value / _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_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 / _struct_ref_seq_dif.details / _struct_site.pdbx_auth_asym_id / _struct_site.pdbx_auth_comp_id / _struct_site.pdbx_auth_seq_id
Revision 1.3Sep 6, 2023Group: Data collection / Refinement description
Category: chem_comp_atom / chem_comp_bond / pdbx_initial_refinement_model
Revision 1.4Oct 30, 2024Group: Structure summary / Category: pdbx_entry_details / pdbx_modification_feature

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Structure visualization

Structure viewerMolecule:
MolmilJmol/JSmol

Downloads & links

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Assembly

Deposited unit
A: antibody fab fragment heavy chain
B: antibody fab fragment light chain
C: Voltage-gated potassium channel
hetero molecules


Theoretical massNumber of molelcules
Total (without water)57,9708
Polymers57,7753
Non-polymers1955
Water00
1


  • Idetical with deposited unit
  • defined by software
TypeNameSymmetry operationNumber
identity operation1_555x,y,z1
MethodPISA
2
A: antibody fab fragment heavy chain
B: antibody fab fragment light chain
C: Voltage-gated potassium channel
hetero molecules

A: antibody fab fragment heavy chain
B: antibody fab fragment light chain
C: Voltage-gated potassium channel
hetero molecules

A: antibody fab fragment heavy chain
B: antibody fab fragment light chain
C: Voltage-gated potassium channel
hetero molecules

A: antibody fab fragment heavy chain
B: antibody fab fragment light chain
C: Voltage-gated potassium channel
hetero molecules


Theoretical massNumber of molelcules
Total (without water)231,88032
Polymers231,09812
Non-polymers78220
Water0
TypeNameSymmetry operationNumber
identity operation1_555x,y,z1
crystal symmetry operation2_775-x+2,-y+2,z1
crystal symmetry operation3_755-y+2,x,z1
crystal symmetry operation4_575y,-x+2,z1
Unit cell
Length a, b, c (Å)155.713, 155.713, 74.072
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
11C-1-

K

21C-2-

K

31C-3-

K

41C-4-

K

51C-5-

K

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Components

#1: Antibody antibody fab fragment heavy chain


Mass: 23411.242 Da / Num. of mol.: 1 / Source method: isolated from a natural source / Source: (natural) Mus musculus (house mouse)
#2: Antibody antibody fab fragment light chain


Mass: 23435.738 Da / Num. of mol.: 1 / Source method: isolated from a natural source / Source: (natural) Mus musculus (house mouse) / References: UniProt: P01837*PLUS
#3: Protein Voltage-gated potassium channel


Mass: 10927.571 Da / Num. of mol.: 1 / Fragment: UNP residues 21-124 / Mutation: H25Q,L90C,R117Q,E120Q,R121Q,R122Q,H124Q
Source method: isolated from a genetically manipulated source
Source: (gene. exp.) Streptomyces lividans (bacteria) / Gene: kcsA, skc1 / Production host: Escherichia coli (E. coli) / Strain (production host): XL10-Gold / References: UniProt: P0A334
#4: Chemical
ChemComp-K / POTASSIUM ION


Mass: 39.098 Da / Num. of mol.: 5 / Source method: obtained synthetically / Formula: K
Has protein modificationY

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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: 3.89 Å3/Da / Density % sol: 68.35 %
Crystal growTemperature: 298 K / Method: vapor diffusion, sitting drop
Details: 20-25% PEG400, 50mM magnesium acetate, 50mM sodium acetate pH 5.0-6.0, pH 5-6, VAPOR DIFFUSION, SITTING DROP, temperature 298K
PH range: 5-6

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Data collection

Diffraction sourceSource: SYNCHROTRON / Site: APS / Beamline: 24-ID-C / Wavelength: 1 Å
DetectorType: ADSC QUANTUM 315 / Detector: CCD / Date: Oct 13, 2006
RadiationProtocol: SINGLE WAVELENGTH / Monochromatic (M) / Laue (L): M / Scattering type: x-ray
Radiation wavelengthWavelength: 1 Å / Relative weight: 1
ReflectionResolution: 3→40 Å / Num. all: 17949 / Num. obs: 17088 / % possible obs: 95.2 % / Observed criterion σ(F): 2 / Observed criterion σ(I): 2

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Processing

Software
NameVersionClassification
ADSCQuantumdata collection
CNSrefinement
HKL-2000data reduction
HKL-2000data scaling
CNSphasing
RefinementMethod to determine structure: MOLECULAR REPLACEMENT
Starting model: PDB entry 1K4C

1k4c


Resolution: 3→40 Å / σ(F): 2
RfactorNum. reflection
Rfree0.2549 1666
Rwork0.2479 -
all-17949
obs-17088
Refinement stepCycle: LAST / Resolution: 3→40 Å
ProteinNucleic acidLigandSolventTotal
Num. atoms3929 0 5 0 3934
Refine LS restraints
Refine-IDTypeDev ideal
X-RAY DIFFRACTIONc_bond_d0.019754
X-RAY DIFFRACTIONc_angle_deg1.44327

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