Related Experiment Video
Updated: May 7, 2026
08:32
Detection of the pH-dependent Activity of Escherichia coli Chaperone HdeB In Vitro and In Vivo
Published on: October 23, 2016
Inside the chaperonin toolbox: theoretical and computational models for chaperonin mechanism
Del Lucent1, Jeremy England, Vijay Pande
1Biophysics Program, Stanford University, Stanford, CA, USA.
Physical Biology
|February 12, 2009
Summary
Chaperonins assist protein folding through diverse mechanisms, not mutually exclusive models. Computational studies reveal these protein folding assistants may use a toolkit of strategies, including the role of water, to function effectively.
Area of Science:
- Molecular Biology
- Biophysics
- Computational Biology
Background:
- Chaperonins are essential molecular machines crucial for protein folding and cellular function.
- The exact mechanisms by which chaperonins facilitate protein folding are not fully understood.
- Diverse experimental models exist, suggesting varied chaperonin-substrate interactions.
Purpose of the Study:
- To review and synthesize computational models of chaperonin function.
- To propose a unified view of chaperonin mechanisms as a versatile toolkit.
- To highlight the underappreciated role of water in chaperonin-assisted protein folding.
Main Methods:
- Review of existing computational studies on chaperonin mechanisms.
- Analysis of different theoretical models for chaperonin function.
- Discussion of simulation data and experimental correlations.
Main Results:
- Computational models offer high temporal and spatial resolution for studying protein folding.
- Existing models for chaperonin function can be integrated rather than being mutually exclusive.
- The role of water in the chaperonin mechanism is a significant, often overlooked, factor.
Conclusions:
- Chaperonins likely employ a flexible set of mechanisms to fold diverse substrate proteins.
- Computational approaches are vital for elucidating complex molecular processes like protein folding.
- Future research should further investigate the influence of solvent (water) on chaperonin activity.
More Related Videos
Related Concept Videos
02:41Protein Complex Assembly
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.
Many viruses self-assemble into a fully functional unit using the infected host cell to...
Many viruses self-assemble into a fully functional unit using the infected host cell to...
03:00Molecular Chaperones and Protein Folding
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.
The...
The...
01:48ATP Synthase: Mechanism
In animals, the mitochondrial F1F0 ATP synthase is the key protein that synthesizes ATP molecules through a complex catalytic mechanism. While the nuclear genome encodes the majority of ATP synthase subunits, the mitochondrial genome encodes some of the enzyme's most critical components. The formation of this multi-subunit enzyme is a complex multi-step process regulated at the level of transcription, translation, and assembly. Defects in one or more of these steps can result in decreased ATP...
01:32Pinching-off of Coated Vesicles
Vesicle budding is orchestrated by distinct cytosolic proteins such as adaptor proteins, coat proteins, and GTPases. To initiate vesicle budding, membrane-bending proteins containing crescent-shaped BAR domains bind to the lipid heads in the bilayer and distort the membrane to form a protein-coated vesicle bud. Adaptors proteins such as AP2 for clathrin-coated vesicles can nucleate on the deformed membrane. Finally, coat proteins such as clathrin or COPI and COPII assemble into a coat forming...
01:21Structure of Porins
Mitochondria, chloroplasts, and gram-negative bacteria have transmembrane, beta-barrel proteins called porins to mediate the free diffusion of ions and metabolites across the membrane. Mitochondrial porin precursors contain conserved amino acid sequences called beta signals at their C-terminal. Beta signals have a motif of PoXGXXHyXHy (Po-Polar, X-Any amino acid, G-Glycine, Hy-LargeHydrophobic), which are crucial for precursor recognition to initiate precursor assembly. Beta-barrel precursors...
03:00Molecular Chaperones and Protein Folding
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.
The...
The...