2NSR

Nitromethane Modified Horse Heart Myoglobin

• PDB DOI: https://doi.org/10.2210/pdb2NSR/pdb

• Classification: OXYGEN STORAGE/TRANSPORT
• Organism(s): Equus caballus
• Mutation(s): No 


• Deposited: 2006-11-06 Released: 2007-11-06 
• Deposition Author(s): Copeland, D.M., West, A.H., Richter-Addo, G.B.

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Experimental Data Snapshot

• Method: X-RAY DIFFRACTION
• Resolution: 1.90 Å
• R-Value Free: 0.231 
• R-Value Work: 0.160 
• R-Value Observed: 0.163 

Starting Model: experimental

Literature

Nitrosoalkane and Nitrosoarene Binding to Myoglobin and Heme Models

Copeland, D.M., West, A.H., Richter-Addo, G.B.

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: 17.84 kDa 
• Atom Count: 1,384 
• Modelled Residue Count: 152 
• Deposited Residue Count: 153 
• Unique protein chains: 1

Macromolecules

Entity ID: 1
Molecule	Chains	Sequence Length	Organism	Details	Image
Myoglobin	A	153	Equus caballus	Mutation(s): 0  EC: 1.11.1 (UniProt), 1.7 (UniProt)
UniProt
Find proteins for P68082 (Equus caballus) Explore P68082  Go to UniProtKB:  P68082

Small Molecules

Ligands 3 Unique
ID	Chains	Name / Formula / InChI Key	2D Diagram
HEM	D [auth A]	PROTOPORPHYRIN IX CONTAINING FE C34 H32 Fe N4 O4 KABFMIBPWCXCRK-RGGAHWMASA-L
SO4	B [auth A], C [auth A]	SULFATE ION O4 S QAOWNCQODCNURD-UHFFFAOYSA-L
NSM	E [auth A]	NITROSOMETHANE C H3 N O IMHRONYAKYWGCC-UHFFFAOYSA-N

Experimental Data & Validation

Experimental Data

• Method: X-RAY DIFFRACTION
• Resolution: 1.90 Å
• R-Value Free: 0.231 
• R-Value Work: 0.160 
• R-Value Observed: 0.163 
• Space Group: P 1 2₁ 1

Unit Cell:

Length ( Å )	Angle ( ˚ )
a = 35.344	α = 90
b = 28.74	β = 106
c = 63.471	γ = 90

Software Package:

Software Name	Purpose
REFMAC	refinement
CrystalClear	data collection
d*TREK	data reduction
d*TREK	data scaling
MOLREP	phasing

Structure Validation

Entry History 

Deposition Data

• Released Date: 2007-11-06 
Deposition Author(s): Copeland, D.M., West, A.H., Richter-Addo, G.B.

Revision History  

• Version 1.0: 2007-11-06
  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