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.

Macromolecule Content

• Total Structure Weight: 32273.53 
• Atom Count: 2278 
• Residue Count: 287 
• Unique protein chains: 2

1LFV

OXY HEMOGLOBIN (88% RELATIVE HUMIDITY)

• DOI: 10.2210/pdb1LFV/pdb

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


• Deposited: 2002-04-12 Released: 2002-10-12 
• Deposition Author(s): Biswal, B.K., Vijayan, M.

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Experimental Data Snapshot

• Method: X-RAY DIFFRACTION
• Resolution: 2.8 Å
• R-Value Free: 0.270 
• R-Value Work: 0.210 

Literature

Structures of human oxy- and deoxyhaemoglobin at different levels of humidity: variability in the T state.

Biswal, B.K., Vijayan, M.

(2002) Acta Crystallogr.,Sect.D 58: 1155-1161

• PubMed: 12077435 
• Primary Citation of Related Structures:  
  1LFZ, 1LFY, 1LFT, 1LFQ, 1LFL, 1JY7
• Also Cited By: 2ZLX, 2ZLW, 2ZLV, 2ZLU, 2ZLT


• PubMed Abstract: 
  

High-salt crystals of human oxy- and deoxyhaemoglobin have been studied at different levels of environmental humidity and solvent content. The structure of the oxy form remains relatively unchanged at all levels. The deoxy form, however, undergoes a water-mediated transformation when the relative humidity around the crystals is reduced below 93%. The space group is maintained during the transformation, but the unit-cell volume nearly doubles, with two tetrameric molecules in the asymmetric unit of the low-humidity form compared with one in the native crystals. Interestingly, the haem geometry in the low-humidity form is closer to that in the oxy form than to that in the native deoxy form. The quaternary structure of one of the tetramers moves slightly towards that in the oxy form, while that in the other is more different from the oxy form than that in the high-salt native deoxy form. Thus, it would appear that, as in the case of the liganded form, the deoxy form of haemoglobin can also access an ensemble of related T states.

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Related Citations: 

• A Third Quaternary Structure of Human Hemoglobin a at 1.7-Angstroms Resolution
  Silva, M.M.,Rogers, P.H.,Arnone, A.
  (1992) J.Biol.Chem. 267: 17248
• Structure of human oxyhaemoglobin at 2.1 A resolution
  Shaanan, B.
  (1983) J.Mol.Biol. 171: 31
• The crystal structure of human deoxyhaemoglobin at 1.74 A resolution
  Fermi, G.,Perutz, M.F.,Shaanan, B.,Fourme, R.
  (1984) J.Mol.Biol. 175: 159




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Organizational Affiliation: 

Molecular Biophysics Unit, Indian Institute of Science, Bangalore 560 012, India.

Macromolecules

Find similar proteins by: Sequence  |  Structure

Entity ID: 1
Molecule	Chains	Sequence Length	Organism	Details
Hemoglobin alpha chain	A	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	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	PROTOPORPHYRIN IX CONTAINING FE HEME C34 H32 Fe N4 O4 KABFMIBPWCXCRK-RGGAHWMASA-L

Experimental Data & Validation

Experimental Data

• Method: X-RAY DIFFRACTION
• Resolution: 2.8 Å
• R-Value Free: 0.270 
• R-Value Work: 0.210 
• Space Group: P 4₁ 2₁ 2

Unit Cell:

Length (Å)	Angle (°)
a = 54.200	α = 90.00
b = 54.200	β = 90.00
c = 194.200	γ = 90.00

Software Package:

Software Name	Purpose
CNS	refinement
AMoRE	phasing
MAR345	data collection
SCALEPACK	data scaling

Structure Validation

Entry History 

Deposition Data

• Deposited Date: 2002-04-12 
• Released Date: 2002-10-12 
• Deposition Author(s): Biswal, B.K., Vijayan, M.

Revision History 

• Version 1.0: 2002-10-12
  Type: Initial release
• Version 1.1: 2008-04-28
  Type: Version format compliance
• Version 1.2: 2011-07-13
  Type: Version format compliance
• Version 1.3: 2017-10-11
  Type: Refinement description