1MBI

X-RAY CRYSTAL STRUCTURE OF THE FERRIC SPERM WHALE MYOGLOBIN: IMIDAZOLE COMPLEX AT 2.0 ANGSTROMS RESOLUTION


Experimental Data Snapshot

  • Method: X-RAY DIFFRACTION
  • Resolution: 2.00 Å
  • R-Value Observed: 0.148 

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This is version 1.3 of the entry. See complete history


Literature

X-ray crystal structure of the ferric sperm whale myoglobin: imidazole complex at 2.0 A resolution.

Lionetti, C.Guanziroli, M.G.Frigerio, F.Ascenzi, P.Bolognesi, M.

(1991) J Mol Biol 217: 409-412

  • DOI: https://doi.org/10.1016/0022-2836(91)90744-q
  • Primary Citation of Related Structures:  
    1MBI, 1SWM

  • PubMed Abstract: 

    The X-ray crystal structure of the ferric sperm whale (Physeter catodon) myoglobin:imidazole complex has been refined at 2.0 A resolution, to a final R-factor of 14.8%. The overall conformation of the protein is little affected by binding of the ligand. Imidazole is co-ordinated to the heme iron at the distal site, and forces distinguishable local changes in the surrounding protein residues. His64(E7) swings out of the distal pocket and becomes substantially exposed to the solvent: nevertheless, it stabilizes the exogenous ligand by hydrogen bonding. The side-chains of residues Arg45(CD3) and Asp60(E3) are also affected by imidazole association.


  • Organizational Affiliation

    Dipartimento di Genetica e Microbiologia, Università di Pavia, Italy.


Macromolecules
Find similar proteins by:  (by identity cutoff)  |  3D Structure
Entity ID: 1
MoleculeChains Sequence LengthOrganismDetailsImage
MYOGLOBIN153Physeter catodonMutation(s): 0 
UniProt
Find proteins for P02185 (Physeter macrocephalus)
Explore P02185 
Go to UniProtKB:  P02185
Entity Groups  
Sequence Clusters30% Identity50% Identity70% Identity90% Identity95% Identity100% Identity
UniProt GroupP02185
Sequence Annotations
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  • Reference Sequence
Experimental Data & Validation

Experimental Data

  • Method: X-RAY DIFFRACTION
  • Resolution: 2.00 Å
  • R-Value Observed: 0.148 
  • Space Group: P 1 21 1
Unit Cell:
Length ( Å )Angle ( ˚ )
a = 64.9α = 90
b = 30.76β = 105.67
c = 34.86γ = 90
Software Package:
Software NamePurpose
TNTrefinement

Structure Validation

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Ligand Structure Quality Assessment 


Entry History 

Deposition Data

Revision History  (Full details and data files)

  • Version 1.0: 1991-10-15
    Type: Initial release
  • Version 1.1: 2008-03-24
    Changes: Version format compliance
  • Version 1.2: 2011-07-13
    Changes: Version format compliance
  • Version 1.3: 2024-02-14
    Changes: Data collection, Database references, Derived calculations, Other