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STUDIES ON CRYSTAL STRUCTURES ACTIVE CENTER GEOMETRY AND DEPURINE MECHANISM OF TWO RIBOSOME-INACTIVATING PROTEINS

X-ray diffraction
1.6Å resolution
PDB entry 1mrk coloured by chain, front view.
PDB entry 1mrk coloured by chain, side view.
PDB entry 1mrk coloured by chain, top view.
Source organism: Trichosanthes kirilowii
Assembly composition:
monomeric (preferred)
Entry contents: 1 distinct polypeptide molecule

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Assemblies

Assembly 1 (preferred)
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Assembly Name: Ribosome-inactivating protein alpha-trichosanthin
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Multimeric state: monomeric
Accessible surface area: 11004.04 Å2
Buried surface area: 566.32 Å2
Dissociation area: 283.16 Å2
Dissociation energy (ΔGdiss): -4.98 kcal/mol
Dissociation entropy (TΔSdiss): 3.78 kcal/mol
Symmetry number: 1
PDBe Complex ID: PDB-CPX-140879

Macromolecules

Ribosome-inactivating protein alpha-trichosanthin
Chain: A
Length: 247 amino acids
Theoretical weight: 27.17 KDa
Source organism: Trichosanthes kirilowii
Expression system: Not provided
UniProt:
  • Canonical: P09989 (Residues: 24-270; Coverage: 93%)
Pfam: Ribosome inactivating protein
InterPro:
CATH:
SCOP: Plant cytotoxins
Ribosome-inactivating protein alpha-trichosanthin in PDB entry 1mrk, assembly 1, front view.
Ribosome-inactivating protein alpha-trichosanthin in PDB entry 1mrk, assembly 1, side view.
Ribosome-inactivating protein alpha-trichosanthin in PDB entry 1mrk, assembly 1, top view.
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