2DHB

THREE DIMENSIONAL FOURIER SYNTHESIS OF HORSE DEOXYHAEMOGLOBIN AT 2.8 ANGSTROMS RESOLUTION

• PDB DOI: https://doi.org/10.2210/pdb2DHB/pdb
• Entry: 2DHB supersedes: 1DHB

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


• Deposited: 1973-11-01 Released: 1977-06-07 
• Deposition Author(s): Perutz, M.F.

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Experimental Data Snapshot

• Method: X-RAY DIFFRACTION
• Resolution: 2.80 Å

Literature

Three dimensional fourier synthesis of horse deoxyhaemoglobin at 2.8 Angstrom units resolution.

Bolton, W., Perutz, M.F.

(1970) Nature 228: 551-552

• PubMed: 5472471 
• DOI: https://doi.org/10.1038/228551a0
• Primary Citation of Related Structures:  
  2DHB

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.

Macromolecule Content

• Total Structure Weight: 32.38 kDa 
• Atom Count: 2,289 
• Modelled Residue Count: 287 
• Deposited Residue Count: 287 
• Unique protein chains: 2

Macromolecules

Entity ID: 1
Molecule	Chains	Sequence Length	Organism	Details	Image
HEMOGLOBIN (DEOXY) (ALPHA CHAIN)	A	141	Equus caballus	Mutation(s): 0
UniProt
Find proteins for P01958 (Equus caballus) Explore P01958  Go to UniProtKB:  P01958

Entity ID: 2
Molecule	Chains	Sequence Length	Organism	Details	Image
HEMOGLOBIN (DEOXY) (BETA CHAIN)	B	146	Equus caballus	Mutation(s): 0
UniProt
Find proteins for P02062 (Equus caballus) Explore P02062  Go to UniProtKB:  P02062

Small Molecules

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

Experimental Data & Validation

Experimental Data

• Method: X-RAY DIFFRACTION
• Resolution: 2.80 Å
• Space Group: C 2 2 2₁

Unit Cell:

Length ( Å )	Angle ( ˚ )
a = 76.96	α = 90
b = 81.7	β = 90
c = 92.63	γ = 90

Structure Validation

Entry History 

Deposition Data

• Released Date: 1977-06-07 
Deposition Author(s): Perutz, M.F.
• This entry supersedes: 1DHB

Revision History  

• Version 1.0: 1977-06-07
  Type: Initial release
  
• Version 1.1: 2008-03-03
  Changes: Version format compliance
• Version 1.2: 2011-07-13
  Changes: Advisory, Version format compliance
• Version 1.3: 2014-10-29
  Changes: Derived calculations
• Version 1.4: 2018-04-04
  Changes: Data collection, Other, Structure summary
• Version 1.5: 2024-02-14
  Changes: Data collection, Database references, Derived calculations