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Structure of a novel photoreceptor: the BLUF domain of AppA from Rhodobacter sphaeroides

X-ray diffraction
2.3Å resolution
PDB entry 1yrx coloured by chain, front view.
PDB entry 1yrx coloured by chain, side view.
PDB entry 1yrx coloured by chain, top view.
Source organism: Cereibacter sphaeroides 2.4.1
Assemblies composition:
homo dimer (preferred)
homo tetramer
homo hexamer
Entry contents: 1 distinct polypeptide molecule

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Assemblies

Assembly 1 (preferred)
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Assembly Name: AppA protein
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Multimeric state: homo dimer
Accessible surface area: 14999.18 Å2
Buried surface area: 3486.04 Å2
Dissociation area: 585.39 Å2
Dissociation energy (ΔGdiss): -6.43 kcal/mol
Dissociation entropy (TΔSdiss): 11.4 kcal/mol
Symmetry number: 1
PDBe Complex ID: PDB-CPX-176042
Assembly 2
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Assembly Name: AppA protein
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Multimeric state: homo dimer
Accessible surface area: 15463.87 Å2
Buried surface area: 4185.76 Å2
Dissociation area: 570.26 Å2
Dissociation energy (ΔGdiss): -0.55 kcal/mol
Dissociation entropy (TΔSdiss): 11.67 kcal/mol
Symmetry number: 2
PDBe Complex ID: PDB-CPX-176042
Assembly 3
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Assembly Name: AppA protein
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Multimeric state: homo tetramer
Accessible surface area: 24777.39 Å2
Buried surface area: 13339.23 Å2
Dissociation area: 3,538.19 Å2
Dissociation energy (ΔGdiss): 15.54 kcal/mol
Dissociation entropy (TΔSdiss): 35.88 kcal/mol
Symmetry number: 1
PDBe Complex ID: PDB-CPX-176043
Assembly 4
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Assembly Name: AppA protein
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Multimeric state: homo hexamer
Accessible surface area: 40956.71 Å2
Buried surface area: 15647.98 Å2
Dissociation area: 531.78 Å2
Dissociation energy (ΔGdiss): -20.86 kcal/mol
Dissociation entropy (TΔSdiss): 24.36 kcal/mol
Symmetry number: 2
PDBe Complex ID: PDB-CPX-176044

Macromolecules

AppA protein
Chains: A, B, C
Length: 121 amino acids
Theoretical weight: 13.54 KDa
Source organism: Cereibacter sphaeroides 2.4.1
Expression system: Escherichia coli
UniProt:
  • Canonical: Q53119 (Residues: 17-133; Coverage: 26%)
Gene name: appA
Pfam: Sensors of blue-light using FAD
InterPro:
CATH: Alpha-Beta Plaits
SCOP: BLUF domain
BLUF domain-containing protein in PDB entry 1yrx, assembly 1, front view.
BLUF domain-containing protein in PDB entry 1yrx, assembly 1, side view.
BLUF domain-containing protein in PDB entry 1yrx, assembly 1, top view.
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