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Structural Determinants of the beta-Selectivity of a Bacterial Aminotransferase

X-ray diffraction
1.95Å resolution
PDB entry 4ao4 coloured by chain, front view.
PDB entry 4ao4 coloured by chain, side view.
PDB entry 4ao4 coloured by chain, top view.
Source organism: Mesorhizobium sp. LUK
Assembly composition:
homo dimer (preferred)
Entry contents: 1 distinct polypeptide molecule

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Assemblies

Assembly 1
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Assembly Name: Beta-transaminase
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Multimeric state: homo dimer
Accessible surface area: 27386.7 Å2
Buried surface area: 10182.78 Å2
Dissociation area: 4,428.94 Å2
Dissociation energy (ΔGdiss): 59.09 kcal/mol
Dissociation entropy (TΔSdiss): 15.13 kcal/mol
Symmetry number: 2
PDBe Complex ID: PDB-CPX-107110
Assembly 2 (preferred)
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Assembly Name: Beta-transaminase
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Multimeric state: homo dimer
Accessible surface area: 27247.03 Å2
Buried surface area: 9563.99 Å2
Dissociation area: 4,346.39 Å2
Dissociation energy (ΔGdiss): 57.82 kcal/mol
Dissociation entropy (TΔSdiss): 15.11 kcal/mol
Symmetry number: 2
PDBe Complex ID: PDB-CPX-107110

Macromolecules

Beta-transaminase
Chains: A, B, C
Length: 465 amino acids
Theoretical weight: 49.59 KDa
Source organism: Mesorhizobium sp. LUK
Expression system: Escherichia coli BL21(DE3)
UniProt:
  • Canonical: A3EYF7 (Residues: 1-445; Coverage: 100%)
Pfam: Aminotransferase class-III
InterPro:
CATH:
Beta-transaminase in PDB entry 4ao4, assembly 2, front view.
Beta-transaminase in PDB entry 4ao4, assembly 2, side view.
Beta-transaminase in PDB entry 4ao4, assembly 2, top view.
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