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Human beta interferon gene localization and expression in somatic cell hybrids.

P M Pitha, D L Slate, N B Raj

    Molecular and Cellular Biology
    |May 1, 1982
    PubMed
    Summary
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    The human fibroblast interferon gene beta 1 (IFNB1) is located on chromosome 9. Other interferon genes are present on different chromosomes, as shown by studies using human/rodent somatic cell hybrids.

    Area of Science:

    • Genetics
    • Molecular Biology
    • Immunology

    Background:

    • Interferons are crucial proteins involved in the immune response.
    • Mapping specific genes helps understand their function and regulation.
    • Previous studies suggested the existence of multiple interferon genes in the human genome.

    Purpose of the Study:

    • To determine the chromosomal location of the human fibroblast interferon gene beta 1 (IFNB1).
    • To investigate the presence of other unlinked interferon sequences in the human genome.

    Main Methods:

    • Human/rodent somatic cell hybrid analysis was used to map the IFNB1 gene.
    • Sequence homology analysis of genomic DNA and induced mRNA was performed using a beta 1 cDNA clone.
    • Hybrid cell lines with specific human chromosome compositions were analyzed.

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    Main Results:

    • The human IFNB1 gene was successfully mapped to chromosome 9.
    • Sequence homology to IFNB1 was detected in cell lines containing human chromosome 9.
    • Homology was absent in cell lines lacking chromosome 9 or with translocations involving chromosomes 9 and 11.
    • Interferon mRNA sequences not homologous to IFNB1 were found in cell lines containing human chromosomes 2 and 5, but lacking chromosome 9.

    Conclusions:

    • The human fibroblast interferon beta 1 gene is located on chromosome 9.
    • The human genome contains additional, unlinked interferon gene sequences, likely located on chromosomes 2 and 5.