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potassium channel KcsA-Fab complex in Cs+

X-ray diffraction
2.41Å resolution
PDB entry 1r3l coloured by chain, front view.
PDB entry 1r3l coloured by chain, side view.
PDB entry 1r3l coloured by chain, top view.
Source organisms:
Assembly composition:
hetero dodecamer (preferred)
Entry contents: 3 distinct polypeptide molecules

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Assemblies

Assembly 1 (preferred)
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Multimeric state: hetero dodecamer
Accessible surface area: 86700.42 Å2
Buried surface area: 34171.79 Å2
Dissociation area: 5,311.5 Å2
Dissociation energy (ΔGdiss): -19.72 kcal/mol
Dissociation entropy (TΔSdiss): 58.67 kcal/mol
Symmetry number: 4
PDBe Complex ID: PDB-CPX-134707

Macromolecules

Immunoglobulin kappa constant
Chain: A
Length: 212 amino acids
Theoretical weight: 23.44 KDa
Source organism: Mus musculus
UniProt:
  • Canonical: P01837 (Residues: 1-105; Coverage: 98%)
Gene name: Igkc
Pfam: Immunoglobulin C1-set domain
InterPro:
CATH: Immunoglobulins
SCOP:
Immunoglobulin kappa constant in PDB entry 1r3l, assembly 1, front view.
Immunoglobulin kappa constant in PDB entry 1r3l, assembly 1, side view.
Immunoglobulin kappa constant in PDB entry 1r3l, assembly 1, top view.
PDBe-KB: UniProt Coverage View: P01837  
121220406080100120140160180200
 
50100150200
UniProt
P01837
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Domains
Secondary structure
Flexibility predictions
Early folding residue predictions
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Ig gamma-1 chain C region secreted form
Chain: B
Length: 219 amino acids
Theoretical weight: 23.41 KDa
Source organism: Mus musculus
UniProt:
  • Canonical: P01868 (Residues: 1-101; Coverage: 31%)
Gene names: Igh-4, Ighg1
Pfam: Immunoglobulin C1-set domain
InterPro:
CATH: Immunoglobulins
SCOP:
Ig gamma-1 chain C region secreted form in PDB entry 1r3l, assembly 1, front view.
Ig gamma-1 chain C region secreted form in PDB entry 1r3l, assembly 1, side view.
Ig gamma-1 chain C region secreted form in PDB entry 1r3l, assembly 1, top view.
PDBe-KB: UniProt Coverage View: P01868  
121920406080100120140160180200
 
100200
UniProt
P01868
Chains
Domains
Secondary structure
Flexibility predictions
Early folding residue predictions
Ligand binding sites
Interaction interfaces
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pH-gated potassium channel KcsA
Chain: C
Length: 124 amino acids
Theoretical weight: 13.21 KDa
Source organism: Streptomyces lividans
Expression system: Escherichia coli
UniProt:
  • Canonical: P0A334 (Residues: 1-124; Coverage: 78%)
Gene names: kcsA, skc1
Pfam:
InterPro: Potassium channel domain
CATH: Helix Hairpins
SCOP: Voltage-gated potassium channels
pH-gated potassium channel KcsA in PDB entry 1r3l, assembly 1, front view.
pH-gated potassium channel KcsA in PDB entry 1r3l, assembly 1, side view.
pH-gated potassium channel KcsA in PDB entry 1r3l, assembly 1, top view.
PDBe-KB: UniProt Coverage View: P0A334  
1124102030405060708090100110120
 
50100
UniProt
P0A334
Chains
Domains
Secondary structure
Flexibility predictions
Early folding residue predictions
Ligand binding sites
Interaction interfaces
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