Biological Assembly 1  

 3D View: Structure | Electron Density | Ligand Interaction

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

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

Macromolecule Content

• Total Structure Weight: 64547.05 
• Atom Count: 4542 
• Residue Count: 574 
• Unique protein chains: 2

1A3N

DEOXY HUMAN HEMOGLOBIN

• DOI: 10.2210/pdb1A3N/pdb

• Classification: OXYGEN TRANSPORT
• Organism(s): Homo sapiens


• Deposited: 1998-01-22 Released: 1998-04-29 
• Deposition Author(s): Tame, J., Vallone, B.

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Experimental Data Snapshot

• Method: X-RAY DIFFRACTION
• Resolution: 1.8 Å
• R-Value Free: 0.220 
• R-Value Work: 0.171 

Literature

The structures of deoxy human haemoglobin and the mutant Hb Tyralpha42His at 120 K.

Tame, J.R., Vallone, B.

(2000) Acta Crystallogr.,Sect.D 56: 805-811

• PubMed: 10930827 
• Primary Citation of Related Structures:  
  1A3O


• PubMed Abstract: 
  

The structures of deoxy human haemoglobin and an artificial mutant (Tyralpha42-->His) have been solved at 120 K. While overall agreement between these structures and others in the PDB is very good, certain side chains are found to be shifted, absent from the electron-density map or in different rotamers. Non-crystallographic symmetry (NCS) is very well obeyed in the native protein, but not around the site of the changed residue in the mutant. NCS is also not obeyed by the water molecule invariably found in the alpha-chain haem pocket in room-temperature crystal structures of haemoglobin. At 120 K, this water molecule disappears from one alpha chain in the asymmetric unit but not the other.

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Organizational Affiliation: 

Protonic Nanomachine Project, ERATO, 3-4 Hikaridai, Seika, Kyoto 619-0237, Japan. [e-mail].

Macromolecules

Find similar proteins by: Sequence  |  Structure

Entity ID: 1
Molecule	Chains	Sequence Length	Organism	Details
HEMOGLOBIN (ALPHA CHAIN)	A, C	141	Homo sapiens	Mutation(s): 0  Gene Names: HBA1, HBA2
Find proteins for P69905 (Homo sapiens) Go to Gene View: HBA1 HBA2 Go to UniProtKB:  P69905

Entity ID: 2
Molecule	Chains	Sequence Length	Organism	Details
HEMOGLOBIN (BETA CHAIN)	B, D	146	Homo sapiens	Mutation(s): 0  Gene Names: HBB
Find proteins for P68871 (Homo sapiens) Go to Gene View: HBB Go to UniProtKB:  P68871

Small Molecules

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

Experimental Data & Validation

Experimental Data

• Method: X-RAY DIFFRACTION
• Resolution: 1.8 Å
• R-Value Free: 0.220 
• R-Value Work: 0.171 
• Space Group: P 1 2₁ 1

Unit Cell:

Length (Å)	Angle (°)
a = 62.650	α = 90.00
b = 82.430	β = 99.61
c = 53.530	γ = 90.00

Software Package:

Software Name	Purpose
DENZO	data reduction
SCALEPACK	data scaling
REFMAC	refinement

Structure Validation

Entry History 

Deposition Data

• Deposited Date: 1998-01-22 
• Released Date: 1998-04-29 
• Deposition Author(s): Tame, J., Vallone, B.

Revision History 

• Version 1.0: 1998-04-29
  Type: Initial release
• Version 1.1: 2008-03-24
  Type: Version format compliance
• Version 1.2: 2011-07-13
  Type: Version format compliance