PDBe 1ike

X-ray diffraction
1.5Å resolution

Crystal Structure of Nitrophorin 4 from Rhodnius Prolixus Complexed with Histamine at 1.5 A Resolution


Function and Biology Details

Reaction catalysed:
3 nitrite + 2 H(+) = 2 nitric oxide + nitrate + H(2)O. 
Biochemical function:
Biological process:
Cellular component:

Structure analysis Details

Assembly composition:
monomeric (preferred)
Entry contents:
1 distinct polypeptide molecule
Nitrophorin-4 Chain: A
Molecule details ›
Chain: A
Length: 184 amino acids
Theoretical weight: 20.29 KDa
Source organism: Rhodnius prolixus
Expression system: Escherichia coli BL21(DE3)
  • Canonical: Q94734 (Residues: 22-205; Coverage: 100%)
Sequence domains: Nitrophorin
Structure domains: Lipocalin

Ligands and Environments

2 bound ligands:

No modified residues

Experiments and Validation Details

Entry percentile scores
X-ray source: ENRAF-NONIUS FR571
Spacegroup: C2
Unit cell:
a: 70.18Å b: 42.52Å c: 52.86Å
α: 90° β: 94.35° γ: 90°
R R work R free
0.18 0.18 0.24
Expression system: Escherichia coli BL21(DE3)