PDBe 1rt9

X-ray diffraction
2.3Å resolution

Structure of human purine nucleoside phosphorylase in complex with Immucillin-H and sulfate

Source organism: Homo sapiens
Entry authors: Shi W, Lewandowicz A, Tyler PC, Furneaux RH, Almo SC, Schramm VL

Function and Biology Details

Reaction catalysed:
(1) Purine nucleoside + phosphate = purine + alpha-D-ribose 1-phosphate. (2) Purine deoxynucleoside + phosphate = purine + 2'-deoxy-alpha-D-ribose 1-phosphate. 
Biochemical function:
Biological process:
Cellular component:

Structure analysis Details

Assembly composition:
homo trimer (preferred)
Entry contents:
1 distinct polypeptide molecule
Purine nucleoside phosphorylase Chain: A
Molecule details ›
Chain: A
Length: 289 amino acids
Theoretical weight: 32.18 KDa
Source organism: Homo sapiens
Expression system: Escherichia coli
  • Canonical: P00491 (Residues: 1-289; Coverage: 100%)
Gene names: NP, PNP
Sequence domains: Phosphorylase superfamily
Structure domains: Rossmann fold

Ligands and Environments

2 bound ligands:

No modified residues

Experiments and Validation Details

Entry percentile scores
X-ray source: NSLS BEAMLINE X9A
Spacegroup: R32
Unit cell:
a: 142.076Å b: 142.076Å c: 166.955Å
α: 90° β: 90° γ: 120°
R R work R free
0.254 0.251 0.281
Expression system: Escherichia coli