These tools will no longer be maintained as of December 31, 2024. Archived website can be found here. PubMed4Hh GitHub repository can be found here. Contact NLM Customer Service if you have questions.


Pubmed for Handhelds

PUBMED FOR HANDHELDS

Search MEDLINE/PubMed

  • Title: Linear electric field effect and electron spin-echo studies of uteroferrin. Evidence for iron coordination by a nitrogen-containing ligand.
    Author: Antanaitis BC, Peisach J, Mims WB, Aisen P.
    Journal: J Biol Chem; 1985 Apr 25; 260(8):4572-4. PubMed ID: 2985558.
    Abstract:
    Uteroferrin and semimethemerythrin, proteins possessing spin-coupled binuclear iron centers, exhibit large linear electric field effects in their mixed-valence, EPR-active states. This indicates that the paramagnetic center of each protein is noncentrosymmetric and suggests that charge may be localized on one of the iron atoms. The magnetic field dependence of the linear electric field effects for both proteins demonstrates that the direction of most facile polarization of the binuclear iron centers is near the orientation giving rise to gmin. Electron spin-echo studies of uteroferrin reveal that its magnetic electron interacts with at least one and possibly two classes of nitrogen nuclei. Furthermore, comparison of echo envelope spectra for uteroferrin with that of ferric bleomycin suggests that one of these nuclei is from a histidine ligand.
    [Abstract] [Full Text] [Related] [New Search]