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Related Concept Videos

Molecular Chaperones and Protein Folding03:00

Molecular Chaperones and Protein Folding

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The native conformation of a protein is formed by interactions between the side chains of its constituent amino acids. When the amino acids cannot form these interactions, the protein cannot fold by itself and needs chaperones. Notably, chaperones do not relay any additional information required for the folding of polypeptides; the native conformation of a protein is determined solely by its amino acid sequence. Chaperones catalyze protein folding without being a part of the folded protein.
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Bacterial Protein Maturation01:26

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Bacterial protein maturation is a tightly regulated process that ensures newly synthesized polypeptides achieve correct functional conformations. This maturation involves a series of modifications, folding events, and quality control steps, often assisted by specialized chaperone proteins.N-Terminal ModificationsThe maturation of bacterial polypeptides begins cotranslationally as the polypeptide exits the ribosome. The first amino acid, N-formylmethionine (fMet), is typically modified at the...
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Coat Assembly and GTPases01:33

Coat Assembly and GTPases

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Vesicles incorporate different coat protein subunits in different cell locations, which changes the properties of the coat, such as the shape and geometry of the transport vesicles. Thus, vesicle coat proteins also play a significant role in cargo selection.
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Cotranslational Protein Translocation01:20

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Translocation of proteins across membranes is an ancient process that occurs even in bacteria and archaebacteria. In fact, the components of the translocation machinery are still conserved between prokaryotes and eukaryotes.
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Proteins can form homomeric complexes with another unit of the same protein or heteromeric complexes with different types.  Most protein complexes self-assemble spontaneously via ordered pathways, while some proteins need assembly factors that guide their proper assembly. Despite the crowded intracellular environment, proteins usually interact with their correct partners and form functional complexes.
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Protein-protein Interfaces02:04

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Many proteins form complexes to carry out their functions, making protein-protein interactions (PPIs) essential for an organism's survival. Most PPIs are stabilized by numerous weak noncovalent chemical forces. The physical shape of the interfaces determines the way two proteins interact. Many globular proteins have closely-matching shapes on their surfaces, which form a large number of weak bonds. Additionally, many PPIs occur between two helices or between a surface cleft and a...
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Related Experiment Video

Updated: Aug 17, 2025

Studies of Chaperone-Cochaperone Interactions using Homogenous Bead-Based Assay
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Chaperonin: Co-chaperonin Interactions.

Aileen Boshoff1

  • 1Biotechnology Innovation Centre, Rhodes University, Makhanda/Grahamstown, South Africa. a.boshoff@ru.ac.za.

Sub-Cellular Biochemistry
|December 15, 2022
PubMed
Summary
This summary is machine-generated.

Co-chaperonins assist chaperonins in ATP-dependent protein folding. Understanding diverse chaperonin and co-chaperonin roles, including human HSP60, aids disease treatment development.

Keywords:
ChaperoninsCo-chaperoninsCpn10Cpn60GroELGroESHsp10Hsp60

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Area of Science:

  • Molecular Biology
  • Cell Biology
  • Biochemistry

Background:

  • Chaperonins are conserved protein folding machines, existing in Group I and II.
  • Group I chaperonins, like GroEL/GroES, use a double-ring structure and co-chaperonin lid for protein folding.
  • Group II chaperonins are structurally distinct and do not require co-chaperonins.

Purpose of the Study:

  • To explore the diverse functions of chaperonins and co-chaperonins.
  • To highlight the role of human HSP60 in disease pathogenesis.
  • To emphasize the need for further research into Hsp10's cellular roles.

Main Methods:

  • Review of existing literature on chaperonin and co-chaperonin mechanisms.
  • Analysis of structural and functional differences between Group I and II chaperonins.
  • Examination of the involvement of human chaperonins in disease.

Main Results:

  • Co-chaperonins collaborate with chaperonins in ATP-dependent protein folding.
  • GroEL/GroES utilize a unique mechanism involving conformational changes and a lid.
  • Multiple chaperonin and co-chaperonin proteins exist in bacteria and eukaryotes with varied functions.

Conclusions:

  • Chaperonins and co-chaperonins are crucial for cellular protein homeostasis.
  • Dysregulation of chaperonins, like human HSP60, is implicated in diseases such as autoimmune disorders and cancer.
  • Further investigation into Hsp10 functions may lead to novel therapeutic strategies for chaperonin-related diseases.