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Crystal structure of tetra mutant (D67E,A68P,L98I,A301S) of O-acetylserine sulfhydrylase from Salmonella typhimurium in complex with high-affinity inhibitory peptide from serine acetyltransferase of Salmonella typhimurium at 2.8 A

X-ray diffraction
2.8Å resolution
PDB entry 7yom coloured by chain, front view.
PDB entry 7yom coloured by chain, side view.
PDB entry 7yom coloured by chain, top view.
Source organisms:
Assembly composition:
hetero tetramer (preferred)
Entry contents: 2 distinct polypeptide molecules

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Assemblies

Assembly 1 (preferred)
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Assembly Name: Cysteine synthase and peptide
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Multimeric state: hetero tetramer
Accessible surface area: 23045.25 Å2
Buried surface area: 5551.09 Å2
Dissociation area: 1,081.92 Å2
Dissociation energy (ΔGdiss): 7.55 kcal/mol
Dissociation entropy (TΔSdiss): 12.47 kcal/mol
Symmetry number: 2
PDBe Complex ID: PDB-CPX-223790

Macromolecules

Cysteine synthase
Chain: A
Length: 316 amino acids
Theoretical weight: 33.71 KDa
Source organism: Haemophilus influenzae Rd KW20
Expression system: Escherichia coli BL21(DE3)
UniProt:
  • Canonical: P45040 (Residues: 1-316; Coverage: 100%)
Gene names: HI_1103, cysK
Pfam: Pyridoxal-phosphate dependent enzyme
Cysteine synthase in PDB entry 7yom, assembly 1, front view.
Cysteine synthase in PDB entry 7yom, assembly 1, side view.
Cysteine synthase in PDB entry 7yom, assembly 1, top view.
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peptide from serine acetyltransferase
Chain: B
Length: 8 amino acids
Theoretical weight: 901 Da
Source organism: Salmonella enterica subsp. enterica serovar Typhimurium
Expression system: Not provided
peptide from serine acetyltransferase in PDB entry 7yom, assembly 1, front view.
peptide from serine acetyltransferase in PDB entry 7yom, assembly 1, side view.
peptide from serine acetyltransferase in PDB entry 7yom, assembly 1, top view.
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