1THB

REFINEMENT OF A PARTIALLY OXYGENATED T STATE HAEMOGLOBIN AT 1.5 ANGSTROMS RESOLUTION


Experimental Data Snapshot

  • Method: X-RAY DIFFRACTION
  • Resolution: 1.50 Å
  • R-Value Observed: 0.196 

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This is version 2.1 of the entry. See complete history


Literature

Refinement of a partially oxygenated T state human haemoglobin at 1.5 A resolution.

Waller, D.A.Liddington, R.C.

(1990) Acta Crystallogr B 46: 409-418

  • DOI: https://doi.org/10.1107/s0108768190000313
  • Primary Citation of Related Structures:  
    1THB

  • PubMed Abstract: 

    The degree of ligation of T state human haemoglobin crystals is reduced by inositol hexaphosphate (IHP). The structure of a partially ligated haemoglobin has been refined using fast Fourier restrained-least-squares techniques. Manual interventions were required to escape from local minima and introduce a large number of solvent molecules. Individual isotropic temperature factors were refined for all atoms and the final average atomic temperature factor is 32.3 A2. The final R factor is 19.6% for all data between 10 and 1.5 A. The final model consists of 4560 protein atoms and 313 solvent molecules. The occupancies of the ligand atoms and the anisotropic behaviour of the iron atoms have been refined, demonstrating that the alpha haem groups are only partially ligated and that there is no ligation of the beta haems. Density for the IHP indicates that it is not well ordered even though changes in the ligation and structure of the haemoglobin indicate its presence.


  • Organizational Affiliation

    Department of Chemistry, University of York, Heslington, England.


Macromolecules
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Entity ID: 1
MoleculeChains Sequence LengthOrganismDetailsImage
HEMOGLOBIN A (OXY) (ALPHA CHAIN)
A, C
141Homo sapiensMutation(s): 0 
UniProt & NIH Common Fund Data Resources
Find proteins for P69905 (Homo sapiens)
Explore P69905 
Go to UniProtKB:  P69905
PHAROS:  P69905
Entity Groups  
Sequence Clusters30% Identity50% Identity70% Identity90% Identity95% Identity100% Identity
UniProt GroupP69905
Sequence Annotations
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  • Reference Sequence
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Entity ID: 2
MoleculeChains Sequence LengthOrganismDetailsImage
HEMOGLOBIN A (DEOXY) (BETA CHAIN)
B, D
146Homo sapiensMutation(s): 0 
UniProt & NIH Common Fund Data Resources
Find proteins for P68871 (Homo sapiens)
Explore P68871 
Go to UniProtKB:  P68871
PHAROS:  P68871
GTEx:  ENSG00000244734 
Entity Groups  
Sequence Clusters30% Identity50% Identity70% Identity90% Identity95% Identity100% Identity
UniProt GroupP68871
Sequence Annotations
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  • Reference Sequence
Experimental Data & Validation

Experimental Data

  • Method: X-RAY DIFFRACTION
  • Resolution: 1.50 Å
  • R-Value Observed: 0.196 
  • Space Group: P 21 21 2
Unit Cell:
Length ( Å )Angle ( ˚ )
a = 95.8α = 90
b = 97.8β = 90
c = 65.5γ = 90
Software Package:
Software NamePurpose
PROLSQrefinement

Structure Validation

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Ligand Structure Quality Assessment 


Entry History 

Deposition Data

Revision History  (Full details and data files)

  • Version 1.0: 1991-01-15
    Type: Initial release
  • Version 1.1: 2008-03-03
    Changes: Version format compliance
  • Version 1.2: 2011-07-13
    Changes: Version format compliance
  • Version 1.3: 2012-10-17
    Changes: Advisory
  • Version 2.0: 2023-02-08
    Type: Remediation
    Changes: Atomic model, Data collection, Database references, Derived calculations, Other, Refinement description, Structure summary
  • Version 2.1: 2023-03-15
    Changes: Advisory