1NP4

CRYSTAL STRUCTURE OF NITROPHORIN 4 FROM RHODNIUS PROLIXUS


Experimental Data Snapshot

  • Method: X-RAY DIFFRACTION
  • Resolution: 1.5 Å
  • R-Value Free: 0.262 
  • R-Value Work: 0.204 

wwPDB Validation 3D Report Full Report


This is version 1.3 of the entry. See complete history

Literature

The crystal structure of nitrophorin 4 at 1.5 A resolution: transport of nitric oxide by a lipocalin-based heme protein.

Andersen, J.F.Weichsel, A.Balfour, C.A.Champagne, D.E.Montfort, W.R.

(1998) Structure 6: 1315-1327


  • PubMed Abstract: 
  • Nitrophorins are nitric oxide (NO) transport proteins from the saliva of blood-feeding insects, which act as vasodilators and anti-platelet agents. Rhodnius prolixus, an insect that carries the trypanosome that causes Chagas' disease, releases four N ...

    Nitrophorins are nitric oxide (NO) transport proteins from the saliva of blood-feeding insects, which act as vasodilators and anti-platelet agents. Rhodnius prolixus, an insect that carries the trypanosome that causes Chagas' disease, releases four NO-loaded nitrophorins during blood feeding, whereupon the ligand is released into the bloodstream or surrounding tissue of the host. Histamine, a signaling molecule released by the host upon tissue damage, is tightly bound by the nitrophorins; this may facilitate the release of NO and reduce inflammation in the host.


    Organizational Affiliation

    Department of Biochemistry University of Arizona Tucson, AZ 85721, USA.




Macromolecules

Find similar proteins by: Sequence  |  Structure

Entity ID: 1
MoleculeChainsSequence LengthOrganismDetails
PROTEIN (NITROPHORIN 4)
A
184Rhodnius prolixusEC: 1.7.6.1
Find proteins for Q94734 (Rhodnius prolixus)
Go to UniProtKB:  Q94734
Small Molecules
Ligands 2 Unique
IDChainsName / Formula / InChI Key2D Diagram3D Interactions
HEM
Query on HEM

Download SDF File 
Download CCD File 
A
PROTOPORPHYRIN IX CONTAINING FE
HEME
C34 H32 Fe N4 O4
KABFMIBPWCXCRK-RGGAHWMASA-L
 Ligand Interaction
NH3
Query on NH3

Download SDF File 
Download CCD File 
A
AMMONIA
H3 N
QGZKDVFQNNGYKY-UHFFFAOYSA-N
 Ligand Interaction
Experimental Data & Validation

Experimental Data

  • Method: X-RAY DIFFRACTION
  • Resolution: 1.5 Å
  • R-Value Free: 0.262 
  • R-Value Work: 0.204 
  • Space Group: C 1 2 1
Unit Cell:
Length (Å)Angle (°)
a = 70.540α = 90.00
b = 43.650β = 94.19
c = 53.120γ = 90.00
Software Package:
Software NamePurpose
CCP4model building
CCP4data scaling
MADNESSdata collection
ROTAVATAdata scaling
ROTAVATAdata reduction
X-PLORrefinement
MADNESSdata reduction
CCP4phasing

Structure Validation

View Full Validation Report or Ramachandran Plots



Entry History 

Deposition Data

Revision History 

  • Version 1.0: 1998-08-05
    Type: Initial release
  • Version 1.1: 2008-04-27
    Type: Version format compliance
  • Version 1.2: 2011-07-13
    Type: Version format compliance
  • Version 1.3: 2017-10-04
    Type: Refinement description