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Related Experiment Videos

Differential expression of the cellular src gene during vertebrate development.

M Schartl, A Barnekow

    Developmental Biology
    |October 1, 1984
    PubMed
    Summary

    The cellular src (c-src) gene product, pp60c-src, shows dynamic expression during embryogenesis, with highest activity in the brain and muscle during development, suggesting a role in differentiation.

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    Area of Science:

    • Molecular Biology
    • Developmental Biology
    • Oncogenes

    Background:

    • Cellular homologs of viral transforming genes, like c-src, are implicated in normal development.
    • Understanding c-src expression during embryogenesis is crucial for deciphering its developmental roles.

    Purpose of the Study:

    • To investigate the expression and activity of the c-src gene product (pp60c-src) during embryogenesis in fish, frog, and chicken.
    • To determine the enzymatic characteristics and developmental regulation of pp60c-src kinase activity.

    Main Methods:

    • Quantitative determination of pp60c-src protein kinase activity in embryonic and adult tissues.
    • Analysis of enzymatic properties, including substrate specificity and inhibitor sensitivity.
    • Comparison of kinase activity across different developmental stages and organs.

    Main Results:

    • Embryonic pp60c-src kinase activity exhibited similar enzymatic characteristics to adult forms, phosphorylating tyrosine residues and being insensitive to Ap4A.
    • Kinase activity levels varied significantly during development, increasing during organogenesis and declining thereafter.
    • Brain consistently showed the highest activity, while muscle exhibited high activity during organogenesis but diminished in adults.

    Conclusions:

    • The c-src gene product is differentially expressed during embryogenesis, with activity levels correlating with developmental stages.
    • pp60c-src likely plays a more significant role in differentiation than proliferation during embryogenesis.
    • The c-src gene product may function as a pleiotropic effector in developmental processes.

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