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Molecular chaperones and protein folding in plants
R S Boston1, P V Viitanen, E Vierling
1Department of Botany, North Carolina State University, Raleigh 27695, USA.
Plant Molecular Biology
|October 1, 1996
Summary
Molecular chaperones and foldases are essential proteins that assist other proteins in achieving their correct three-dimensional structures in plants. These systems are vital for protein synthesis, maturation, and cellular function, especially under stress.
Area of Science:
- Plant Biology
- Molecular Biology
- Biochemistry
Background:
- In vivo protein folding relies on specialized proteins called foldases and molecular chaperones.
- Foldases, such as protein disulfide isomerase and peptidyl prolyl isomerase, catalyze specific bond rearrangements.
- Molecular chaperones bind to unstable, non-native proteins, aiding their proper folding.
Purpose of the Study:
- To review the current understanding of chaperone and foldase functions in plants.
- To highlight systems with detailed mechanistic data or unique plant-specific features.
- To emphasize the broad cellular roles of these protein-folding assistants.
Main Methods:
- Literature review and synthesis of existing research on plant protein folding.
- Focus on well-characterized chaperone systems like HSP70/DnaK and HSP60/GroE.
- Inclusion of other chaperones such as HSP100, HSP90, small HSPs, and calnexin.
Main Results:
- Chaperones and foldases interact with most cellular proteins throughout their lifecycle.
- These systems are crucial for protein synthesis, targeting, maturation, and degradation across all cellular compartments.
- They play a critical role in normal cell function and survival under stress conditions.
Conclusions:
- Plant chaperone and foldase systems are diverse and essential for cellular proteostasis.
- Understanding these systems is key to comprehending plant cell function and stress response.
- Further research into plant-specific features offers unique insights into protein folding mechanisms.