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Common 82-nucleotide sequence unique to brain RNA

J G Sutcliffe, R J Milner, F E Bloom

    Proceedings of the National Academy of Sciences of the United States of America
    |August 1, 1982
    PubMed
    Summary
    This summary is machine-generated.

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    Researchers discovered novel "ID sequences" in rat genes. These sequences, found in introns, appear to control tissue-specific gene expression, particularly in the brain.

    Area of Science:

    • Molecular Biology
    • Genetics
    • Neuroscience

    Background:

    • cDNA libraries derived from rat brain polyA+RNA were analyzed.
    • Unusual hybridization properties were observed in several cDNA clones.

    Purpose of the Study:

    • To investigate the nature of cDNA clones exhibiting unique hybridization patterns.
    • To identify the specific sequence responsible for tissue-specific hybridization.
    • To determine the genomic location and potential function of this sequence.

    Main Methods:

    • Hybridization studies using cDNA clones and RNA from different rat tissues (brain, liver, kidney).
    • Nucleotide sequencing of cDNA inserts.
    • Sequence analysis to identify commonalities and genomic localization.

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    Main Results:

    • cDNA clones hybridized to a 160-nucleotide RNA species exclusively found in the brain.
    • A common 82-nucleotide sequence within the cDNA inserts was identified as responsible for this specific hybridization.
    • This 82-nucleotide sequence was found to be located in the second intron of a rat growth hormone gene.

    Conclusions:

    • The identified 82-nucleotide sequence, termed 'ID sequences', likely plays a role in regulating gene expression.
    • These 'ID sequences' may be intronic elements that direct tissue-specific gene expression, such as in the brain.
    • This finding provides insight into mechanisms controlling differential gene activity across tissues.