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A time-less function for mouse timeless.

A L Gotter1, T Manganaro, D R Weaver

  • 1Laboratory of Developmental Chronobiology, Massachusetts General Hospital, Boston, Massachusetts 02114, USA.

Nature Neuroscience
|July 21, 2000
PubMed
Summary
This summary is machine-generated.

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The mouse Timeless (mTim) gene is crucial for embryonic development but lacks a confirmed role in the mammalian circadian clock. This study clarifies mTim

Area of Science:

  • Chronobiology
  • Developmental Biology
  • Genetics

Background:

  • The timeless (tim) gene is a key component of the circadian clock in Drosophila melanogaster.
  • A potential mammalian homolog, mTimeless (mTim), has been investigated for its role in the mammalian circadian clock.
  • The precise function of mTim in mammalian circadian rhythms remains unclear.

Purpose of the Study:

  • To investigate the function of the mouse Timeless homolog (mTim).
  • To determine if mTim plays a role in the mammalian circadian clock.
  • To clarify the developmental role of mTim.

Main Methods:

  • Genetic analysis of mTim in mice.
  • Phenotypic characterization of mTim knockout models.
  • Assessment of circadian behavior and molecular clock components.

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Main Results:

  • mTim is essential for successful embryonic development in mice.
  • Mice lacking functional mTim exhibit developmental defects.
  • No significant circadian clock function was substantiated for mTim in mammals.

Conclusions:

  • The mouse Timeless homolog (mTim) is indispensable for embryonic development.
  • mTim does not appear to have a substantiated role in the mammalian circadian clock.
  • These findings differentiate the function of Timeless homologs between insects and mammals.