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Related Experiment Videos

Human ferritin genes: chromosomal assignments and polymorphisms.

R A Gatti1, R Shaked, T K Mohandas

  • 1Department of Pathology, University of California at Los Angeles.

American Journal of Human Genetics
|October 1, 1987
PubMed
Summary

Researchers cloned ferritin heavy and light subunit DNA from HL-60 cells, identifying gene locations and two genetic polymorphisms (FTH/BamHI and FTH/TaqI) for potential genomic screening.

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Area of Science:

  • Molecular Biology
  • Genetics
  • Biochemistry

Background:

  • Ferritin proteins intracellularly sequester iron, preventing cellular toxicity.
  • Ferritin molecules consist of heavy and light subunits with variable tissue-specific ratios.
  • HL-60 cell differentiation involves regulated expression of ferritin subunits.

Purpose of the Study:

  • To clone DNA sequences for heavy (HL217-1) and light (HL227) ferritin subunits.
  • To map the chromosomal locations of ferritin heavy-subunit genes.
  • To identify and characterize genetic polymorphisms in ferritin genes.

Main Methods:

  • Cloning of DNA sequences from a cDNA library of differentiated HL-60 cells.
  • Chromosomal localization using hybridization techniques.

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  • Identification and characterization of FTH/BamHI and FTH/TaqI genetic polymorphisms.

    • Main Results:

    • Cloned HL217-1 (heavy) and HL227 (light) ferritin subunit sequences.
    • Confirmed and extended heavy-subunit gene localization to multiple chromosomes.
    • Characterized two genetic polymorphisms: FTH/BamHI (chromosome 3) and FTH/TaqI, with associated allele frequencies and PIC values.

    Conclusions:

    • The study provides detailed genetic information on ferritin subunits.
    • Identified polymorphisms may be valuable for genetic studies and screening.
    • Gene-family probes with specialized gels could screen genomic regions for microdeletions.