Related Experiment Video
Updated: Jun 8, 2026
09:25
NMR 15N Relaxation Experiments for the Investigation of Picosecond to Nanoseconds Structural Dynamics of Proteins
Published on: November 1, 2024
Smoothing molecular interactions: the "kinetic buffer" effect of intrinsically disordered proteins
1State Key Laboratory for Structural Chemistry of Unstable and Stable Species, College of Chemistry and Molecular Engineering, and Center for Theoretical Biology, Peking University, Beijing 100871, People's Republic of China.
Proteins
|October 16, 2010
Summary
Intrinsically disordered proteins (IDPs) show less sensitivity to environmental changes like temperature and binding disruptions. This "kinetic buffer" effect, due to their inherent flexibility, ensures robust cellular signaling.
Area of Science:
- Biochemistry
- Molecular Biology
- Structural Biology
Background:
- Intrinsically disordered proteins (IDPs) are crucial for cellular signaling and molecular recognition.
- IDPs exhibit distinct binding interfaces compared to ordered proteins, influencing their response to cellular perturbations.
Purpose of the Study:
- To investigate the impact of perturbations (intermolecular interactions, temperature) on the coupled folding and binding of pKID to KIX domains.
- To compare the sensitivity of intrinsically disordered and ordered protein systems to these perturbations.
Main Methods:
- Utilized molecular dynamics simulations to model the pKID-KIX system.
- Compared virtual pKID systems with varying degrees of intrinsic disorder.
Main Results:
- Disordered protein systems demonstrated lower sensitivity in complex stability and binding kinetics to perturbations compared to ordered systems.
- Higher flexibility at the complex interface of IDPs was identified as the origin of this reduced sensitivity.
Conclusions:
- IDPs' inherent flexibility confers resistance to environmental perturbations, facilitating rapid and smooth signal transmission.
- This phenomenon, termed the "kinetic buffer" effect, suggests IDPs can maintain specific yet adaptable interactions crucial for cellular function.
More Related Videos
Related Concept Videos
02:18Intrinsically Disordered Proteins
Intrinsically disordered proteins are a group of proteins that do not fold into specific three-dimensional structures. Their structural flexibility allows them to complement ordered proteins to perform functions that are inaccessible to rigid structures. They are more common in eukaryotes than prokaryotes and may either be exclusively intrinsically disordered or hybrid proteins, consisting of a mix of ordered and disordered regions. The absence of a rigid structure in these proteins can be...
02:18Intrinsically Disordered Proteins
Intrinsically disordered proteins are a group of proteins that do not fold into specific three-dimensional structures. Their structural flexibility allows them to complement ordered proteins to perform functions that are inaccessible to rigid structures. They are more common in eukaryotes than prokaryotes and may either be exclusively intrinsically disordered or hybrid proteins, consisting of a mix of ordered and disordered regions. The absence of a rigid structure in these proteins can be...
02:35Noncovalent Attractions in Biomolecules
Noncovalent attractions are associations within and between molecules that influence the shape and structural stability of complexes. These interactions differ from covalent bonding in that they do not involve sharing of electrons.
Four types of noncovalent interactions are hydrogen bonds, van der Waals forces, ionic bonds, and hydrophobic interactions.
Hydrogen bonding results from the electrostatic attraction of a hydrogen atom covalently bonded to a strong-electronegative atom like oxygen,...
Four types of noncovalent interactions are hydrogen bonds, van der Waals forces, ionic bonds, and hydrophobic interactions.
Hydrogen bonding results from the electrostatic attraction of a hydrogen atom covalently bonded to a strong-electronegative atom like oxygen,...
02:35Noncovalent Attractions in Biomolecules
Noncovalent attractions are associations within and between molecules that influence the shape and structural stability of complexes. These interactions differ from covalent bonding in that they do not involve sharing of electrons.
Four types of noncovalent interactions are hydrogen bonds, van der Waals forces, ionic bonds, and hydrophobic interactions.
Hydrogen bonding results from the electrostatic attraction of a hydrogen atom covalently bonded to a strong-electronegative atom like oxygen,...
Four types of noncovalent interactions are hydrogen bonds, van der Waals forces, ionic bonds, and hydrophobic interactions.
Hydrogen bonding results from the electrostatic attraction of a hydrogen atom covalently bonded to a strong-electronegative atom like oxygen,...
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...
02:04Protein-protein Interfaces
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 polypeptide...