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Related Experiment Videos

Review: allostery in chaperonins.

A Horovitz1, Y Fridmann, G Kafri

  • 1Department of Structural Biology, Weizmann Institute of Science, Rehovot, 76100, Israel. Amnon.Horovitz@weizmann.ac.il

Journal of Structural Biology
|October 3, 2001
PubMed
Summary
This summary is machine-generated.

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Chaperonins, crucial for protein folding, exhibit complex allosteric regulation of ATP binding. This study reviews these mechanisms and presents new findings on the allosteric effects of ADP.

Area of Science:

  • Molecular Biology
  • Biochemistry
  • Protein Folding

Background:

  • Chaperonins are essential molecular machines that facilitate protein folding.
  • Their function is ATP-dependent and involves intricate allosteric regulation.
  • Key chaperonins like GroEL and CCT display nested cooperativity in ATP binding.

Purpose of the Study:

  • To review the allosteric properties of chaperonins.
  • To present novel findings on the allosteric effects of ADP on chaperonins.
  • To discuss the role of allostery in the chaperonin reaction cycle and protein folding.

Main Methods:

  • Literature review of chaperonin allosteric regulation.
  • Experimental investigation of ADP's allosteric effects (details not specified in abstract).

Related Experiment Videos

  • Analysis of ATP binding cooperativity (homotropic and heterotropic).

    • Main Results:

    • Chaperonins exhibit both homotropic and heterotropic allosteric regulation.
    • Nested cooperativity (intra-ring positive, inter-ring negative) characterizes ATP binding in GroEL and CCT.
    • Various effectors, including nonfolded proteins, ADP, Mg2+, K+, and cochaperonins, modulate this cooperativity.

    Conclusions:

    • Allosteric regulation is central to chaperonin function and reaction cycles.
    • ADP exerts significant allosteric effects, influencing chaperonin-mediated protein folding.
    • Understanding these allosteric mechanisms is key to deciphering protein homeostasis.