X-ray diffraction
1.55Å resolution

X-ray structure of the H40A/E58A mutant of Ribonuclease T1 complexed with 3'-guanosine monophosphate


Function and Biology Details

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

Structure analysis Details

Assembly composition:
monomeric (preferred)
Entry contents:
1 distinct polypeptide molecule
Guanyl-specific ribonuclease T1 Chain: A
Molecule details ›
Chain: A
Length: 104 amino acids
Theoretical weight: 10.97 KDa
Source organism: Aspergillus oryzae
Expression system: Escherichia coli
  • Canonical: P00651 (Residues: 27-130; Coverage: 100%)
Gene names: AO090011000118, rntA
Sequence domains: ribonuclease
Structure domains: Microbial ribonucleases

Ligands and Environments

2 bound ligands:
No modified residues

Experiments and Validation Details

Entry percentile scores
X-ray source: RIGAKU RU200
Spacegroup: P212121
Unit cell:
a: 40.023Å b: 44.812Å c: 50.105Å
α: 90° β: 90° γ: 90°
R R work R free
0.195 0.189 0.218
Expression system: Escherichia coli