PDBe 2at5

X-ray diffraction
1.22Å resolution

1.22 A Crystal Structure Of Nitrophorin 4 From Rhodnius Prolixus Containing Fe(III) Deuteroporphyrin IX Complexed With Nitric Oxide at pH 5.6

Source organism: Rhodnius prolixus
Entry authors: Amoia AM, Montfort WR

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: X
Molecule details ›
Chain: X
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

3 bound ligands:

No modified residues

Experiments and Validation Details

Entry percentile scores
X-ray source: APS BEAMLINE 14-BM-C
Spacegroup: C2
Unit cell:
a: 70.21Å b: 42.666Å c: 53.005Å
α: 90° β: 94.27° γ: 90°
R R work R free
0.119 0.118 0.148
Expression system: Escherichia coli BL21(DE3)