X-ray diffraction
2.9Å resolution

Crystal Structure of Spermidine Synthase from E. coli


Function and Biology Details

Reactions catalysed:
S-adenosyl 3-(methylthio)propylamine + spermidine = S-methyl-5'-thioadenosine + thermospermine + H(+)
S-adenosyl 3-(methylthio)propylamine + spermidine = S-methyl-5'-thioadenosine + spermine
S-adenosyl 3-(methylthio)propylamine + putrescine = 5'-S-methyl-5'-thioadenosine + spermidine
Biochemical function:
Biological process:
Cellular component:

Structure analysis Details

Assembly composition:
homo dimer (preferred)
Entry contents:
1 distinct polypeptide molecule
Polyamine aminopropyltransferase Chains: A, B, C, D, E, F, G, H
Molecule details ›
Chains: A, B, C, D, E, F, G, H
Length: 294 amino acids
Theoretical weight: 33.19 KDa
Source organism: Escherichia coli K-12
Expression system: Escherichia coli BL21(DE3)
  • Canonical: P09158 (Residues: 1-288; Coverage: 100%)
Gene names: JW0117, b0121, speE
Sequence domains:
Structure domains:

Ligands and Environments

1 bound ligand:
No modified residues

Experiments and Validation Details

Entry percentile scores
X-ray source: NSLS BEAMLINE X29A
Spacegroup: P43
Unit cell:
a: 123.11Å b: 123.11Å c: 210.01Å
α: 90° β: 90° γ: 90°
R R work R free
0.21 0.208 0.241
Expression system: Escherichia coli BL21(DE3)