2QU0 | pdb_00002qu0

Crystal structure determination of sheep methemoglobin at 2.7 Angstrom resolution

• PDB DOI: https://doi.org/10.2210/pdb2QU0/pdb

• Classification: Oxygen storage, Oxygen transport
• Organism(s): Ovis aries
• Mutation(s): No 


• Deposited: 2007-08-03 Released: 2008-08-05 
• Deposition Author(s): Neelagandan, K., Sathya Moorthy, Pon., Balasubramanian, M., Sundaresan, S., Ponnuswamy, M.N.

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Experimental Data Snapshot

• Method: X-RAY DIFFRACTION
• Resolution: 2.70 Å
• R-Value Free: 
  0.254 (Depositor), 0.250 (DCC) 
• R-Value Work: 
  0.195 (Depositor), 0.190 (DCC) 
• R-Value Observed: 
  0.201 (Depositor) 

Starting Model: experimental

Literature

Crystal structure determination of sheep(Ovis aries) methemoglobin at 2.7 angstrom resolution

Neelagandan, K., Sathya Moorthy, Pon., Balasubramanian, M., Sundaresan, S., Ponnuswamy, M.N.

To be published.

Biological Assembly 1  

Global Symmetry: Cyclic - C2  (Explore in 3D)
Global Stoichiometry: Hetero 4-mer - A2B2 Pseudo Symmetry: Dihedral - D2  (Explore in 3D)
Pseudo Stoichiometry: Homo 4-mer - A4 

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

Macromolecule Content

• Total Structure Weight: 64.78 kDa 
• Atom Count: 4,593 
• Modelled Residue Count: 572 
• Deposited Residue Count: 572 
• Unique protein chains: 2

Macromolecules

Entity ID: 1
Molecule	Chains	Sequence Length	Organism	Details	Image
Hemoglobin subunit alpha-1/2	A, C	141	Ovis aries	Mutation(s): 0
UniProt
Find proteins for P68240 (Ovis aries) Explore P68240  Go to UniProtKB:  P68240

Entity ID: 2
Molecule	Chains	Sequence Length	Organism	Details	Image
Hemoglobin subunit beta	B, D	145	Ovis aries	Mutation(s): 0
UniProt
Find proteins for P02075 (Ovis aries) Explore P02075  Go to UniProtKB:  P02075

Small Molecules

Ligands 1 Unique
ID	Chains	Name / Formula / InChI Key	2D Diagram
HEM	E [auth A], F [auth B], G [auth C], H [auth D]	PROTOPORPHYRIN IX CONTAINING FE C34 H32 Fe N4 O4 KABFMIBPWCXCRK-RGGAHWMASA-L

Experimental Data & Validation

Experimental Data

• Method: X-RAY DIFFRACTION
• Resolution: 2.70 Å
• R-Value Free:  0.254 (Depositor), 0.250 (DCC) 
• R-Value Work:  0.195 (Depositor), 0.190 (DCC) 
• R-Value Observed: 0.201 (Depositor) 

Space Group: P 2₁ 2₁ 2₁

Unit Cell:

Length ( Å )	Angle ( ˚ )
a = 60.231	α = 90
b = 70.695	β = 90
c = 131.479	γ = 90

Software Package:

Software Name	Purpose
REFMAC	refinement
AUTOMAR	data reduction
AMoRE	phasing

Structure Validation

Entry History 

Deposition Data

• Released Date: 2008-08-05 
Deposition Author(s): Neelagandan, K., Sathya Moorthy, Pon., Balasubramanian, M., Sundaresan, S., Ponnuswamy, M.N.

Revision History  

• Version 1.0: 2008-08-05
  Type: Initial release
  
• Version 1.1: 2011-07-13
  Changes: Version format compliance
• Version 1.2: 2019-12-18
  Changes: Derived calculations
• Version 1.3: 2023-10-25
  Changes: Data collection, Database references, Derived calculations, Refinement description