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Hsp47: a collagen-specific molecular chaperone

K Nagata1

  • 1Department of Cell Biology, Kyoto University, Japan.

Trends in Biochemical Sciences
|January 1, 1996
PubMed
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Heat shock protein 47 (Hsp47) is a crucial endoplasmic reticulum protein that binds to collagen. It aids in normal collagen processing and quality control, preventing abnormal collagen secretion, especially during stress.

Area of Science:

  • Molecular Biology
  • Cell Biology
  • Biochemistry

Background:

  • Heat shock protein 47 (Hsp47) is an endoplasmic reticulum-resident protein.
  • Hsp47 specifically binds to various collagen types and their precursors (procollagens).

Purpose of the Study:

  • To elucidate the role of Hsp47 in collagen processing and quality control.
  • To understand Hsp47's function under normal and stress conditions.

Main Methods:

  • The study likely involved in vitro binding assays and cell-based experiments to observe Hsp47-procollagen interactions.
  • Analysis of Hsp47 expression in relation to collagen synthesis and secretion.

Main Results:

  • Hsp47 transiently associates with procollagen, facilitating its processing and secretion.

Related Experiment Videos

  • Under stress, Hsp47 acts as a quality control mechanism, preventing the secretion of misfolded procollagen.
  • Hsp47 synthesis levels correlate with collagen synthesis in developing tissues and disease states.

    • Conclusions:

    • Hsp47 is essential for proper collagen biogenesis and secretion.
    • Its role extends beyond molecular chaperoning to include critical quality control functions for collagen.
    • Hsp47 is implicated in collagen-related pathologies like fibrosis.