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Related Experiment Videos

BiP binding keeps ATF6 at bay.

Thomas Sommer1, Ernst Jarosch

  • 1Max-Delbrück Center for Molecular Medicine, Robert-Rossle Str. 10, D-13092, Berlin, Germany.

Developmental Cell
|July 12, 2002
PubMed
Summary
This summary is machine-generated.

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The endoplasmic reticulum chaperone BiP dissociates from ATF6, initiating its transport and activation. This reveals BiP

Area of Science:

  • Cellular biology
  • Molecular mechanisms
  • Protein folding and signaling

Background:

  • The unfolded protein response (UPR) regulates cellular stress.
  • Activating transcription factor 6 (ATF6) is a key UPR sensor.
  • ER protein folding relies on chaperones like BiP.

Purpose of the Study:

  • To elucidate the mechanism of ATF6 activation.
  • To identify the role of ER chaperones in ATF6 regulation.
  • To understand how BiP influences ATF6 transport and function.

Main Methods:

  • Biochemical assays to study protein interactions.
  • Cellular imaging to track protein localization.
  • Analysis of ATF6 processing and transcriptional activity.

Related Experiment Videos

Main Results:

  • BiP dissociation from ATF6 triggers its movement to the Golgi.
  • This dissociation is a critical step for ATF6 proteolytic activation.
  • BiP acts as a sensor for ER folding capacity.

Conclusions:

  • BiP is essential for sensing ER folding status.
  • ATF6 activation is regulated by BiP-mediated ER sensing.
  • Provides mechanistic insights into membrane-bound transcription factor activation.