2q4g

X-ray diffraction
1.95Å resolution

Ensemble refinement of the protein crystal structure of human ribonuclease inhibitor complexed with ribonuclease I

Released:

Function and Biology Details

Reaction catalysed:
(1a) an (RNA) containing cytidine = an (RNA)-3'-cytidine-2',3'-cyclophosphate + a 5'-hydroxy-ribonucleotide-3'-(RNA)
Biochemical function:
Biological process:
Cellular component:

Structure analysis Details

Assembly composition:
hetero tetramer (preferred)
PDBe Complex ID:
PDB-CPX-139882 (preferred)
Entry contents:
2 distinct polypeptide molecules
Macromolecules (2 distinct):
Ribonuclease pancreatic Chains: X, Z
Molecule details ›
Chains: X, Z
Length: 129 amino acids
Theoretical weight: 14.73 KDa
Source organism: Homo sapiens
Expression system: Escherichia coli BL21(DE3)
UniProt:
  • Canonical: P07998 (Residues: 29-156; Coverage: 100%)
Gene names: RIB1, RNASE1, RNS1
Sequence domains: Pancreatic ribonuclease
Structure domains: Ribonuclease A-like domain
Ribonuclease inhibitor Chains: W, Y
Molecule details ›
Chains: W, Y
Length: 461 amino acids
Theoretical weight: 50.02 KDa
Source organism: Homo sapiens
Expression system: Escherichia coli BL21(DE3)
UniProt:
  • Canonical: P13489 (Residues: 1-461; Coverage: 100%)
Gene names: PRI, RNH, RNH1
Sequence domains:
Structure domains: Ribonuclease Inhibitor

Ligands and Environments

1 bound ligand:
No modified residues

Experiments and Validation Details

Entry percentile scores
Spacegroup: P212121
Unit cell:
a: 71.338Å b: 107.546Å c: 155.036Å
α: 90° β: 90° γ: 90°
R-values:
R R work R free
0.161 0.161 0.224
Expression system: Escherichia coli BL21(DE3)