3LNM

F233W mutant of the Kv2.1 paddle-Kv1.2 chimera channel


Experimental Data Snapshot

  • Method: X-RAY DIFFRACTION
  • Resolution: 2.9 Å
  • R-Value Free: 0.247 
  • R-Value Work: 0.211 

wwPDB Validation 3D Report Full Report


This is version 1.2 of the entry. See complete history

Literature

A gating charge transfer center in voltage sensors.

Tao, X.Lee, A.Limapichat, W.Dougherty, D.A.MacKinnon, R.

(2010) Science 328: 67-73

  • DOI: 10.1126/science.1185954

  • PubMed Abstract: 
  • Voltage sensors regulate the conformations of voltage-dependent ion channels and enzymes. Their nearly switchlike response as a function of membrane voltage comes from the movement of positively charged amino acids, arginine or lysine, across the mem ...

    Voltage sensors regulate the conformations of voltage-dependent ion channels and enzymes. Their nearly switchlike response as a function of membrane voltage comes from the movement of positively charged amino acids, arginine or lysine, across the membrane field. We used mutations with natural and unnatural amino acids, electrophysiological recordings, and x-ray crystallography to identify a charge transfer center in voltage sensors that facilitates this movement. This center consists of a rigid cyclic "cap" and two negatively charged amino acids to interact with a positive charge. Specific mutations induce a preference for lysine relative to arginine. By placing lysine at specific locations, the voltage sensor can be stabilized in different conformations, which enables a dissection of voltage sensor movements and their relation to ion channel opening.


    Organizational Affiliation

    Laboratory of Molecular Neurobiology and Biophysics, Rockefeller University, Howard Hughes Medical Institute, 1230 York Avenue, New York, NY 10065, USA.




Macromolecules

Find similar proteins by: Sequence  |  Structure

Entity ID: 1
MoleculeChainsSequence LengthOrganismDetails
Voltage-gated potassium channel subunit beta-2
A, C
333Rattus norvegicusGene Names: Kcnab2 (Ckbeta2, Kcnb3)
EC: 1.1.1.-
Membrane protein
mpstruct
Group: 
TRANSMEMBRANE PROTEINS: ALPHA-HELICAL
Sub Group: 
Channels: Potassium, Sodium, & Proton Ion-Selective
Protein: 
Kv1.2/Kv2.1 Voltage-gated potassium channel chimera
Find proteins for P62483 (Rattus norvegicus)
Go to UniProtKB:  P62483
Entity ID: 2
MoleculeChainsSequence LengthOrganismDetails
F233W mutant of the Kv2.1 paddle-Kv1.2 chimera
B, D
514Rattus norvegicusGene Names: Kcna2, Kcnb1
Membrane protein
mpstruct
Group: 
TRANSMEMBRANE PROTEINS: ALPHA-HELICAL
Sub Group: 
Channels: Potassium, Sodium, & Proton Ion-Selective
Protein: 
Kv1.2/Kv2.1 Voltage-gated potassium channel chimera
Find proteins for P63142 (Rattus norvegicus)
Go to UniProtKB:  P63142
Find proteins for P15387 (Rattus norvegicus)
Go to UniProtKB:  P15387
Small Molecules
Ligands 3 Unique
IDChainsName / Formula / InChI Key2D Diagram3D Interactions
K
Query on K

Download SDF File 
Download CCD File 
B, D
POTASSIUM ION
K
NPYPAHLBTDXSSS-UHFFFAOYSA-N
 Ligand Interaction
NAP
Query on NAP

Download SDF File 
Download CCD File 
A, C
NADP NICOTINAMIDE-ADENINE-DINUCLEOTIDE PHOSPHATE
2'-MONOPHOSPHOADENOSINE 5'-DIPHOSPHORIBOSE
C21 H28 N7 O17 P3
XJLXINKUBYWONI-NNYOXOHSSA-N
 Ligand Interaction
PGW
Query on PGW

Download SDF File 
Download CCD File 
B, D
(1R)-2-{[(S)-{[(2S)-2,3-dihydroxypropyl]oxy}(hydroxy)phosphoryl]oxy}-1-[(hexadecanoyloxy)methyl]ethyl (9Z)-octadec-9-enoate
1-Palmitoyl-2-Oleoyl-sn-Glycero-3-[Phospho-(1-glycerol)]; PHOSPHATIDYLGLYCEROL
C40 H77 O10 P
PAZGBAOHGQRCBP-HGWHEPCSSA-N
 Ligand Interaction
Experimental Data & Validation

Experimental Data

  • Method: X-RAY DIFFRACTION
  • Resolution: 2.9 Å
  • R-Value Free: 0.247 
  • R-Value Work: 0.211 
  • Space Group: P 4 21 2
Unit Cell:
Length (Å)Angle (°)
a = 144.271α = 90.00
b = 144.271β = 90.00
c = 284.060γ = 90.00
Software Package:
Software NamePurpose
CNSrefinement
CBASSdata collection
DENZOdata reduction
SCALEPACKdata scaling
CNSphasing

Structure Validation

View Full Validation Report or Ramachandran Plots



Entry History 

Deposition Data

Revision History 

  • Version 1.0: 2010-04-14
    Type: Initial release
  • Version 1.1: 2011-07-13
    Type: Version format compliance
  • Version 1.2: 2017-08-02
    Type: Refinement description, Source and taxonomy