X-ray diffraction
1.65Å resolution

Crystal structure of ricin A chain in complex with 5-mesitylthiophene-2-carboxylic acid


Function and Biology Details

Reaction catalysed:
Endohydrolysis of the N-glycosidic bond at one specific adenosine on the 28S rRNA.
Biochemical function:
  • not assigned
Biological process:
  • not assigned
Cellular component:
  • not assigned

Structure analysis Details

Assembly composition:
monomeric (preferred)
Entry contents:
1 distinct polypeptide molecule
Ricin A chain Chains: A, B
Molecule details ›
Chains: A, B
Length: 268 amino acids
Theoretical weight: 30.07 KDa
Source organism: Ricinus communis
Expression system: Escherichia coli
  • Canonical: P02879 (Residues: 36-302; Coverage: 49%)
Sequence domains: Ribosome inactivating protein

Ligands and Environments

3 bound ligands:
No modified residues

Experiments and Validation Details

Entry percentile scores
X-ray source: APS BEAMLINE 31-ID
Spacegroup: P21
Unit cell:
a: 38.407Å b: 56.496Å c: 126.903Å
α: 90° β: 93.34° γ: 90°
R R work R free
0.211 0.21 0.238
Expression system: Escherichia coli