1Y8K

Horse methemoglobin low salt, PH 7.0 (88% relative humidity)


Experimental Data Snapshot

  • Method: X-RAY DIFFRACTION
  • Resolution: 2.30 Å
  • R-Value Free: 0.228 
  • R-Value Work: 0.183 
  • R-Value Observed: 0.183 

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Ligand Structure Quality Assessment 


This is version 1.2 of the entry. See complete history


Literature

A new relaxed state in horse methemoglobin characterized by crystallographic studies.

Sankaranarayanan, R.Biswal, B.K.Vijayan, M.

(2005) Proteins 60: 547-551

  • DOI: 10.1002/prot.20510
  • Primary Citation of Related Structures:  
    1Y8H, 1Y8I, 1Y8K

  • PubMed Abstract: 
  • A new relaxed state has been characterized in the crystals of horse methemoglobin grown at neutral pH at low ionic concentration and their low humidity variants. The crystals provide an example for improvement in X-ray diffraction quality with reduced solvent content ...

    A new relaxed state has been characterized in the crystals of horse methemoglobin grown at neutral pH at low ionic concentration and their low humidity variants. The crystals provide an example for improvement in X-ray diffraction quality with reduced solvent content. Only the classical R state has been so far observed in liganded horse hemoglobin. The state characterized in the present study lies in between the R state and the R2 state characterized earlier in liganded human hemoglobin. The results presented here, along with those of earlier studies, suggest that relaxed and tense hemoglobin can access ensembles of states.


    Related Citations: 
    • Structure of Human Methaemoglobin: The Variation of a Theme
      Biswal, B.K., Vijayan, M.
      (2001) Curr Sci 81: 1100
    • Structures of Human Oxy- and Deoxyhaemoglobin at Different Levels of Humidity: Variability in the T State
      Biswal, B.K., Vijayan, M.
      (2002) Acta Crystallogr D Biol Crystallogr 58: 1155

    Organizational Affiliation

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



Macromolecules
Find similar proteins by:  (by identity cutoff)  |  Structure
Entity ID: 1
MoleculeChainsSequence LengthOrganismDetailsImage
Hemoglobin alpha chainsA, C141Equus caballusMutation(s): 0 
Gene Names: HBA
UniProt
Find proteins for P01958 (Equus caballus)
Explore P01958 
Go to UniProtKB:  P01958
Protein Feature View
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  • Reference Sequence
Find similar proteins by:  (by identity cutoff)  |  Structure
Entity ID: 2
MoleculeChainsSequence LengthOrganismDetailsImage
Hemoglobin beta chainB, D146Equus caballusMutation(s): 0 
Gene Names: HBB
UniProt
Find proteins for P02062 (Equus caballus)
Explore P02062 
Go to UniProtKB:  P02062
Protein Feature View
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  • Reference Sequence
Small Molecules
Ligands 1 Unique
IDChainsName / Formula / InChI Key2D Diagram3D Interactions
HEM (Subject of Investigation/LOI)
Query on HEM

Download Ideal Coordinates CCD File 
E [auth A], F [auth B], G [auth C], H [auth D]PROTOPORPHYRIN IX CONTAINING FE
C34 H32 Fe N4 O4
KABFMIBPWCXCRK-RGGAHWMASA-L
 Ligand Interaction
Experimental Data & Validation

Experimental Data

  • Method: X-RAY DIFFRACTION
  • Resolution: 2.30 Å
  • R-Value Free: 0.228 
  • R-Value Work: 0.183 
  • R-Value Observed: 0.183 
  • Space Group: P 21 21 21
Unit Cell:
Length ( Å )Angle ( ˚ )
a = 62.519α = 90
b = 80.14β = 90
c = 111.315γ = 90
Software Package:
Software NamePurpose
DENZOdata reduction
SCALEPACKdata scaling
AMoREphasing
CNSrefinement

Structure Validation

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Ligand Structure Quality Assessment  



Entry History 

Deposition Data

Revision History  (Full details and data files)

  • Version 1.0: 2005-07-26
    Type: Initial release
  • Version 1.1: 2008-04-30
    Changes: Version format compliance
  • Version 1.2: 2011-07-13
    Changes: Version format compliance