X-ray diffraction
2.2Å resolution

Structural Genomics, Protein TM1243, (SAICAR synthetase)

Source organism: Thermotoga maritima

Function and Biology Details

Reaction catalysed:
ATP + 5-amino-1-(5-phospho-D-ribosyl)imidazole-4-carboxylate + L-aspartate = ADP + phosphate + (S)-2-(5-amino-1-(5-phospho-D-ribosyl)imidazole-4-carboxamido)succinate
Biochemical function:
Cellular component:

Structure analysis Details

Assembly composition:
homo dimer (preferred)
Entry contents:
1 distinct polypeptide molecule
Phosphoribosylaminoimidazole-succinocarboxamide synthase Chains: A, B
Molecule details ›
Chains: A, B
Length: 230 amino acids
Theoretical weight: 26.51 KDa
Source organism: Thermotoga maritima
Expression system: Escherichia coli BL21(DE3)
  • Canonical: Q9X0X0 (Residues: 1-230; Coverage: 100%)
Gene names: TM_1243, purC
Sequence domains: SAICAR synthetase
Structure domains:

Ligands and Environments

No bound ligands
1 modified residue:

Experiments and Validation Details

Entry percentile scores
X-ray source: APS BEAMLINE 19-ID
Spacegroup: P21
Unit cell:
a: 63.509Å b: 43.067Å c: 80.217Å
α: 90° β: 92.3° γ: 90°
R R work R free
0.245 0.245 0.281
Expression system: Escherichia coli BL21(DE3)