4JTA

Crystal structure of Kv1.2-2.1 paddle chimera channel in complex with Charybdotoxin


Experimental Data Snapshot

  • Method: X-RAY DIFFRACTION
  • Resolution: 2.5 Å
  • R-Value Free: 0.236
  • R-Value Work: 0.210

Literature

Macromolecules
Sequence Display for 4JTA

Classification: TRANSPORT PROTEIN / toxin

Total Structure Weight: 211114.03

Macromolecule Entities
Molecule Chains Length Organism Details
Voltage-gated potassium channel subunit beta-2 A, P 333 Rattus norvegicus EC#: 1.1.1 IUBMB
Gene Name(s): Kcnab2 Ckbeta2 Kcnb3
Metabolic Pathways
Maps:       
Reactions:
ESCHER  BiGG
Potassium voltage-gated channel subfamily A member 2, Potassium voltage-gated channel subfamily B member 1 B, Q 514 Rattus norvegicus Mutation: C31S, C32S, N207Q, C431S, C478S
Gene Name(s): Kcnb1 Kcna2
Metabolic Pathways
Maps:       
Reactions:
ESCHER  BiGG
Metabolic Pathways
Maps:       
Reactions:
ESCHER  BiGG
Potassium channel toxin alpha-KTx 1.1 Y 37 Leiurus quinquestriatus Mutation: Q1X
Gene Name(s):
Metabolic Pathways
Maps:       
Reactions:
ESCHER  BiGG

Membrane Protein

Source: inferred by homology | Group: ALPHA-HELICAL

Subgroup Name: Channels: Potassium, Sodium, & Proton Ion-Selective

Protein Name: Kv1.2/Kv2.1 Voltage-gated potassium channel chimera


Small Molecules
Ligands 3 Unique
ID Chains Name / Formula / InChI Key 2D Diagram 3D Interactions
PGW
Query on PGW

B, Q (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 (Synonym)
C40 H77 O10 P
PAZGBAOHGQRCBP-HGWHEPCSSA-N
Ligand Explorer NGL
 
Binding Pocket (JSmol)
 
Electron Density (JSmol)
NAP
Query on NAP

A, P NADP NICOTINAMIDE-ADENINE-DINUCLEOTIDE PHOSPHATE
2'-MONOPHOSPHOADENOSINE 5'-DIPHOSPHORIBOSE (Synonym)
C21 H28 N7 O17 P3
XJLXINKUBYWONI-NNYOXOHSSA-N
Ligand Explorer NGL
 
Binding Pocket (JSmol)
 
Electron Density (JSmol)
K
Query on K

B, Q POTASSIUM ION
K
NPYPAHLBTDXSSS-UHFFFAOYSA-N
Ligand Explorer NGL
 
Binding Pocket (JSmol)
 
Electron Density (JSmol)
Modified Residues 1 Unique
ID Chains Type Formula 2D Diagram Parent
PCA
Query on PCA
Y L-PEPTIDE LINKING C5 H7 N O3 GLU

Experimental Data & Validation

Experimental Data

  • Method: X-RAY DIFFRACTION
  • Resolution: 2.5 Å
  • R-Value Free: 0.236
  • R-Value Work: 0.210
  • Space Group: P 4 21 2

Unit Cell:

Length (Å) Angle (°)
a = 144.40 α = 90.00
b = 144.40 β = 90.00
c = 284.10 γ = 90.00

Structure Validation

View Full Validation Report or Ramachandran Plots



Entry History

Deposition Data

  • Deposited Date: 2013-03-23
  • Released Date: 2013-06-12
  • Deposition author(s): MacKinnon, R., Banerjee, A., Lee, A., Campbell, E.

Revision History

  • Version 1_0: 2013-06-12

    Type: Initial release

  • Version 1_1: 2013-06-19

    Type: Derived calculations

  • Version 1_2: 2017-08-16

    Type: Source and taxonomy

  • Version 1_3: 2017-11-15

    Type: Refinement description