1SI6 | pdb_00001si6

Crystal structure of cimex nitrophorin complex with CO

• PDB DOI: https://doi.org/10.2210/pdb1SI6/pdb

• Classification: TRANSPORT PROTEIN
• Organism(s): Cimex lectularius
• Expression System: Escherichia coli BL21(DE3)
• Mutation(s): No 


• Deposited: 2004-02-27 Released: 2005-03-08 
• Deposition Author(s): Weichsel, A., Montfort, W.R.

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Experimental Data Snapshot

• Method: X-RAY DIFFRACTION
• Resolution: 1.45 Å
• R-Value Free: 
  0.257 (Depositor), 0.283 (DCC) 
• R-Value Work: 
  0.203 (Depositor), 0.238 (DCC) 
• R-Value Observed: 
  0.206 (Depositor) 

Starting Model: experimental

Literature

Structure of cimex nitrophorin complex with carbon monoxide

Weichsel, A., Montfort, W.R.

To be published.

Biological Assembly 1  

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

Biological assembly 1 assigned by authors.

Macromolecule Content 

• Total Structure Weight: 32.39 kDa 
• Atom Count: 2,491 
• Modeled 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 2 Unique
ID	Chains	Name / Formula / InChI Key	2D Diagram
HEM	C [auth X]	PROTOPORPHYRIN IX CONTAINING FE C34 H32 Fe N4 O4 KABFMIBPWCXCRK-RGGAHWMASA-L
CMO	B [auth X]	CARBON MONOXIDE C O UGFAIRIUMAVXCW-UHFFFAOYSA-N

Experimental Data & Validation

Experimental Data

• Method: X-RAY DIFFRACTION
• Resolution: 1.45 Å
• R-Value Free:  0.257 (Depositor), 0.283 (DCC) 
• R-Value Work:  0.203 (Depositor), 0.238 (DCC) 
• R-Value Observed: 0.206 (Depositor) 

Space Group: P 1 2₁ 1

Unit Cell:

Length ( Å )	Angle ( ˚ )
a = 49.155	α = 90
b = 41.566	β = 95.48
c = 65.388	γ = 90

Software Package:

Software Name	Purpose
REFMAC	refinement
XDISPLAYF	data reduction
d*TREK	data scaling

Structure Validation

Entry History 

Deposition Data

• Released Date: 2005-03-08 
Deposition Author(s): Weichsel, A., Montfort, W.R.

Revision History  

• Version 1.0: 2005-03-08
  Type: Initial release
  
• Version 1.1: 2008-04-29
  Changes: Version format compliance
• Version 1.2: 2011-07-13
  Changes: Version format compliance
• Version 1.3: 2023-08-23
  Changes: Data collection, Database references, Derived calculations, Refinement description