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2005, Ann N Y Acad Sci

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Swanson J et al, (September 2006) Power-frequency electric and magnetic fields in the light of Draper et al. · 2005

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Insufficient information to determine key finding.

Plain English Summary

Summary written for general audiences

Insufficient information to generate summary. The provided record contains only bibliographic metadata (title, authors, year, journal, organism type) without an abstract or detailed study description. The title suggests a review or commentary on power-frequency electromagnetic fields in relation to work by Draper et al., but specific findings cannot be determined from the title alone.

Why This Matters

This appears to be a commentary or perspective article rather than a primary research study, based on the title's reference to another author's work. In vitro designation suggests discussion of cellular or molecular mechanisms, though without the full text, the specific focus and conclusions cannot be verified.

Exposure Information

Specific exposure levels were not quantified in this study.

Cite This Study
Swanson J et al, (September 2006) Power-frequency electric and magnetic fields in the light of Draper et al. (2005). 2005, Ann N Y Acad Sci.
Show BibTeX
@article{2005_ann_n_y_acad_sci_ce1447,
  author = {Swanson J et al and (September 2006) Power-frequency electric and magnetic fields in the light of Draper et al.},
  title = {2005, Ann N Y Acad Sci},
  year = {2005},
  doi = {10.1074/jbc.M507013200},
  
}
DOI: 10.1074/jbc.M507013200

Quick Questions About This Study

These are protein channels in cell membranes that open and close in response to electrical voltage changes, controlling calcium flow into cells. They're essential for nerve signaling, muscle contraction, and many other cellular processes.
The most dramatic amino acid substitution (I781P) shifted channel activation by 37 millivolts in the hyperpolarizing direction, demonstrating how sensitive these channels are to molecular changes affecting their voltage sensitivity.
Residues 779-782 (LAIA sequence) in the IIS6 segment were identified as critical, with isoleucine-781 being particularly important. These amino acids appear to form a flexible center for channel opening.
Yes, the four critical amino acid residues (779-782) are completely conserved across all high voltage-activated calcium channels, suggesting they share a common gating mechanism across different channel types.
The mutations both destabilized the closed state and stabilized the open state of channels, with effects including slower activation, slower deactivation, and decreased inactivation depending on the specific amino acid substitution.