1MYF

SOLUTION STRUCTURE OF CARBONMONOXY MYOGLOBIN DETERMINED FROM NMR DISTANCE AND CHEMICAL SHIFT CONSTRAINTS


Experimental Data Snapshot

  • Method: SOLUTION NMR
  • Conformers Submitted: 12 

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This is version 1.3 of the entry. See complete history


Literature

Solution structure of carbonmonoxy myoglobin determined from nuclear magnetic resonance distance and chemical shift constraints.

Osapay, K.Theriault, Y.Wright, P.E.Case, D.A.

(1994) J Mol Biol 244: 183-197

  • DOI: https://doi.org/10.1006/jmbi.1994.1718
  • Primary Citation of Related Structures:  
    1MYF

  • PubMed Abstract: 

    Solution NMR structures for sperm whale carbonmonoxy myoglobin have been calculated using 1301 distance restraints determined from nuclear Overhauser enhancement (NOE) measurements on 15N-labeled protein and chemical shift calculations for 385 protons. Starting structures included four crystal forms of myoglobin and 12 structures generated by metric matrix distance geometry. Refinements were also carried out using distance restraints alone. In general, the solution conformations are very close to the crystal structures, although the crystal structures are not consistent with some of the observed NOE connectivities. The solution structures are about as far apart from each other (as measured by backbone root-mean-square deviations) as they are from the crystal conformation. Inclusion of chemical shift restraints both tightened the spread of computed structures (especially in the heme pocket region) and led to structures that were closer to the X-ray conformation. The disposition of the side-chains near the heme group could in many cases be determined with considerable confidence, suggesting that a chemical shift analysis may be a useful adjunct to other sources of structural information available from NMR. In particular, this evidence suggests that the distal histidine residue is slightly displaced from the crystal conformation, but still inside the heme pocket at pH 5.6, that the side-chain of Leu89 is in contact with the heme ring but is probably disordered, and that the heme pocket where ligands bind is virtually identical in solution and in the crystal forms.


  • Organizational Affiliation

    Department of Molecular Biology, Scripps Research Institute, La Jolla, CA 92037.


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
Small Molecules
Ligands 2 Unique
IDChains Name / Formula / InChI Key2D Diagram3D Interactions
HEM
Query on HEM

Download Ideal Coordinates CCD File 
B [auth A]PROTOPORPHYRIN IX CONTAINING FE
C34 H32 Fe N4 O4
KABFMIBPWCXCRK-RGGAHWMASA-L
CMO
Query on CMO

Download Ideal Coordinates CCD File 
C [auth A]CARBON MONOXIDE
C O
UGFAIRIUMAVXCW-UHFFFAOYSA-N
Experimental Data & Validation

Experimental Data

  • Method: SOLUTION NMR
  • Conformers Submitted: 12 

Structure Validation

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Entry History 

Deposition Data

Revision History  (Full details and data files)

  • Version 1.0: 1995-02-27
    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: 2022-02-23
    Changes: Data collection, Database references, Derived calculations, Other