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Related Experiment Videos

Phosphorylated and nonphosphorylated Prolactin isoforms.

A M Walker1

  • 1Division of Biomedical Sciences, University of California, Riverside, CA 92521, USA.

Trends in Endocrinology and Metabolism: TEM
|July 1, 1994
PubMed
Summary
This summary is machine-generated.

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Specific posttranslational modifications of prolactin (PRL) generate hormone variants. Monophosphorylated PRL shows differential release and acts as an antagonist in target tissues, impacting endocrinology.

Area of Science:

  • Endocrinology
  • Molecular Biology
  • Biochemistry

Background:

  • Prolactin (PRL) is a key hormone involved in numerous physiological processes.
  • Posttranslational modifications (PTMs) of PRL generate various hormone isoforms.
  • Understanding these variants is crucial for comprehending PRL's diverse functions.

Purpose of the Study:

  • To review the current knowledge on nonphosphorylated and phosphorylated 24-kD monomeric PRL forms.
  • To highlight the significance of differential release patterns and target tissue activities of these PRL variants.
  • To explore the antagonistic role of monophosphorylated PRL in specific target tissues.

Main Methods:

  • Literature review of existing studies on PRL posttranslational modifications.
  • Analysis of data concerning the release and activity of different PRL monomer forms.

Related Experiment Videos

  • Comparative assessment of nonphosphorylated and phosphorylated PRL variants.

    • Main Results:

    • Specific PTMs, particularly phosphorylation, yield distinct PRL variants.
    • Nonphosphorylated and phosphorylated 24-kD monomeric PRL exhibit differential release in response to physiological signals.
    • Monophosphorylated PRL demonstrates different activities in target tissues, potentially acting as an antagonist to unmodified PRL.

    Conclusions:

    • Posttranslational modification significantly diversifies PRL function.
    • The differential release and activity of PRL variants, especially monophosphorylated PRL, are critical for endocrine regulation.
    • Monophosphorylated PRL's antagonistic action suggests a complex regulatory mechanism in target tissues.