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Related Experiment Videos

Five mouse tubulin isotypes and their regulated expression during development.

S A Lewis, M G Lee, N J Cowan

    The Journal of Cell Biology
    |September 1, 1985
    PubMed
    Summary

    Researchers identified five mouse tubulin genes, revealing conserved isotypes across species. Differential gene expression patterns were observed during mouse development, particularly in the brain.

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    Area of Science:

    • Molecular Biology
    • Developmental Biology
    • Genetics

    Background:

    • Tubulin proteins are essential components of microtubules, crucial for cell structure and function.
    • Understanding tubulin isotype diversity and expression is key to comprehending microtubule dynamics and cellular processes.

    Purpose of the Study:

    • To clone and characterize mouse alpha- and beta-tubulin cDNAs.
    • To investigate the evolutionary conservation of tubulin isotypes.
    • To analyze the developmental and tissue-specific expression patterns of mouse tubulin isotypes.

    Main Methods:

    • Cloning of five mouse tubulin cDNAs (2 alpha, 3 beta).
    • Sequence analysis to identify distinct gene products and assess conservation.
    • Use of non-cross-hybridizing probes for Northern blot analysis of mRNA expression in various mouse tissues during development.

    Main Results:

    • Identified five distinct mouse tubulin isotypes: M alpha 1, M alpha 2, M beta 2, M beta 4, and M beta 5.
    • Demonstrated significant interspecies conservation of beta-tubulin isotypes between mouse, human, and rat.
    • Revealed distinct expression patterns: M alpha 1/M beta 2 (brain/lung), M alpha 2/M beta 5 (ubiquitous), and M beta 4 (brain-specific).
    • Observed differential regulation of tubulin isotype mRNA levels during postnatal development, with M beta 4 increasing and others declining.

    Conclusions:

    • Mouse tubulin genes encode distinct isotypes with significant evolutionary conservation, suggesting functional importance.
    • Differential expression and developmental regulation of tubulin isotypes are critical for mouse organogenesis.
    • The findings provide insights into the molecular mechanisms underlying microtubule function and development.

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