2IMQ

Crystal structure of ferrous cimex nitrophorin

• PDB DOI: https://doi.org/10.2210/pdb2IMQ/pdb

• Classification: TRANSPORT PROTEIN
• Organism(s): Cimex lectularius
• Expression System: Escherichia coli
• Mutation(s): No 


• Deposited: 2006-10-04 Released: 2007-08-21 
• Deposition Author(s): Weichsel, A., Montfort, W.R.

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Experimental Data Snapshot

• Method: X-RAY DIFFRACTION
• Resolution: 1.30 Å
• R-Value Free: 0.208 
• R-Value Work: 0.176 
• R-Value Observed: 0.178 

Starting Model: experimental

Literature

Crystallographic and spectroscopic characterization of ferrous complexes of cimex nitrophorin, a heme-thiolate protein from the bedbug

Weichsel, A., Badgandi, H., Montfort, W.R.

To be published.

Biological Assembly 1  

Global Symmetry: Asymmetric - C1 
Global Stoichiometry: Monomer - A1 

Biological assembly 1 assigned by authors and generated by PISA (software)

Macromolecule Content

• Total Structure Weight: 32.36 kDa 
• Atom Count: 2,495 
• Modelled Residue Count: 280 
• Deposited Residue Count: 282 
• Unique protein chains: 1

Macromolecules

Entity ID: 1
Molecule	Chains	Sequence Length	Organism	Details	Image
Salivary nitrophorin	A [auth X]	282	Cimex lectularius	Mutation(s): 0
UniProt
Find proteins for O76745 (Cimex lectularius) Explore O76745  Go to UniProtKB:  O76745

Small Molecules

Ligands 1 Unique
ID	Chains	Name / Formula / InChI Key	2D Diagram
HEM	B [auth X]	PROTOPORPHYRIN IX CONTAINING FE C34 H32 Fe N4 O4 KABFMIBPWCXCRK-RGGAHWMASA-L

Experimental Data & Validation

Experimental Data

• Method: X-RAY DIFFRACTION
• Resolution: 1.30 Å
• R-Value Free: 0.208 
• R-Value Work: 0.176 
• R-Value Observed: 0.178 
• Space Group: P 1 2₁ 1

Unit Cell:

Length ( Å )	Angle ( ˚ )
a = 49.107	α = 90
b = 41.491	β = 95.4
c = 65.38	γ = 90

Software Package:

Software Name	Purpose
REFMAC	refinement
ADSC	data collection
CrystalClear	data reduction
CrystalClear	data scaling

Structure Validation

Entry History 

Deposition Data

• Released Date: 2007-08-21 
Deposition Author(s): Weichsel, A., Montfort, W.R.

Revision History  

• Version 1.0: 2007-08-21
  Type: Initial release
  
• Version 1.1: 2011-07-13
  Changes: Version format compliance
• Version 1.2: 2023-08-30
  Changes: Data collection, Database references, Derived calculations, Refinement description