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Rat calmodulin cDNA.

A A Sherbany, A S Parent, J Brosius

    DNA (Mary Ann Liebert, Inc.)
    |June 1, 1987
    PubMed
    Summary
    This summary is machine-generated.

    Researchers isolated a rat brain calmodulin gene clone, confirming its high homology to mammalian sequences. They identified two major calmodulin mRNA species, predominantly found in brain tissue.

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    Area of Science:

    • Molecular Biology
    • Neuroscience
    • Genetics

    Background:

    • Calmodulin is a crucial calcium-binding protein involved in numerous cellular processes.
    • Understanding calmodulin gene expression is vital for comprehending brain function and development.

    Purpose of the Study:

    • To isolate and characterize the rat calmodulin gene.
    • To investigate the expression patterns of calmodulin mRNA in different rat tissues.

    Main Methods:

    • Isolation of cDNA and genomic clones from a rat brain library.
    • RNA blot analysis to detect mRNA species.
    • Amino acid sequence comparison with existing mammalian calmodulin sequences.

    Main Results:

    • A rat calmodulin clone was successfully isolated, showing 100% amino acid homology to mammalian calmodulin.

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  • Two major calmodulin mRNA species (2.2 kb and 0.75 kb) were identified in rat.
  • Calmodulin mRNA was found to be significantly enriched in brain tissue compared to liver and kidney.
  • A variant polyadenylation signal (GATAAA) was observed in one mRNA species.

    • Conclusions:

    • The rat calmodulin gene is highly conserved among mammals.
    • Differential expression of calmodulin mRNA in brain suggests tissue-specific roles.
    • The presence of a variant polyadenylation signal may contribute to mRNA heterogeneity.