Allostery, the process by which distant sites within a protein system are energetically coupled, is an efficient and ubiquitous mechanism for activity regulation. A purely mechanical view of allostery invoking only structural changes has developed over the decades as the classical view of the phenomenon. However, a fast growing list of examples illustrate the intimate link between internal motions over a wide range of time scales and function in protein-ligand interactions. Proteins respond to perturbations by redistributing their motions and they use fluctuating conformational states for binding and conformational entropy as a carrier of allosteric energy to modulate association with ligands. In several cases allosteric interactions proceed with minimal or no structural changes. We discuss emerging paradigms for the central role of protein dynamics in allostery.
PMID: 21109422 [PubMed - as supplied by publisher]
A solution NMR view of protein dynamics in the biological membrane.
A solution NMR view of protein dynamics in the biological membrane.
A solution NMR view of protein dynamics in the biological membrane.
Curr Opin Struct Biol. 2011 Jul 30;
Authors: Chill JH, Naider F
Structure determination of membrane-associated proteins (MPs) represents a frontier of structural biology that is characterized by unique challenges in sample preparation and data acquisition. No less important is our ability to study the dynamics of MPs, since MP flexibility and characteristic motions often make sizeable contributions to their...
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08-03-2011 12:00 PM
Carbohydrate-Protein Interactions: A 3D View by NMR.
Carbohydrate-Protein Interactions: A 3D View by NMR.
Carbohydrate-Protein Interactions: A 3D View by NMR.
Chembiochem. 2011 Apr 15;
Authors: Roldós V, Cañada FJ, Jiménez-Barbero J
This review focuses on the application of NMR methods for understanding, at the molecular and atomic levels, the diverse mechanisms by which sugar molecules are recognised by the binding sites of lectins, antibodies and enzymes. Given the intrinsic chemical natures of sugars and their flexibility, it is well established that NMR parameters should be complemented by...
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04-19-2011 11:01 PM
Mapping allostery through the covariance analysis of NMR chemical shifts [Biophysics and Computational Biology]
Mapping allostery through the covariance analysis of NMR chemical shifts
Selvaratnam, R., Chowdhury, S., VanSchouwen, B., Melacini, G....
Date: 2011-04-12
Allostery is a fundamental mechanism of regulation in biology. The residues at the end points of long-range allosteric perturbations are commonly identified by the comparative analyses of structures and dynamics in apo and effector-bound states. However, the networks of interactions mediating the propagation of allosteric signals between the end points often remain elusive. Here we show that the covariance analysis of NMR chemical...
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04-13-2011 01:15 AM
Mapping allostery through the covariance analysis of NMR chemical shifts.
Mapping allostery through the covariance analysis of NMR chemical shifts.
Mapping allostery through the covariance analysis of NMR chemical shifts.
Proc Natl Acad Sci U S A. 2011 Mar 28;
Authors: Selvaratnam R, Chowdhury S, Vanschouwen B, Melacini G
Allostery is a fundamental mechanism of regulation in biology. The residues at the end points of long-range allosteric perturbations are commonly identified by the comparative analyses of structures and dynamics in apo and effector-bound states. However, the networks of interactions mediating the...
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03-31-2011 06:24 PM
[MWClarkson blog] Dynamic origins of PBX1 homeodomain allostery
Dynamic origins of PBX1 homeodomain allostery
http://www.researchblogging.org/public/citation_icons/rb2_large_gray.pngIn the Monod-Wyman-Changeux model for cooperative binding, proteins exist in an equilibrium of low-affinity and high-affinity states in solution, absent any ligand. In this view, although it may appear that the binding of a ligand causes a conformational transition, it actually stabilizes one conformation from a pre-existing equilibrium. In the past several years, advanced NMR techniques have yielded increasing evidence that these structural equilibria exist for a number of...
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12-02-2010 08:41 AM
[NMR paper] Dynamic activation of protein function: a view emerging from NMR spectroscopy.
Dynamic activation of protein function: a view emerging from NMR spectroscopy.
Related Articles Dynamic activation of protein function: a view emerging from NMR spectroscopy.
Nat Struct Biol. 2001 Nov;8(11):926-31
Authors: Wand AJ
Recent developments in solution NMR methods have allowed for an unprecedented view of protein dynamics. Current insights into the nature of protein dynamics and their potential influence on protein structure, stability and function are reviewed. Particular emphasis is placed on the potential of fast side chain motion...
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11-19-2010 08:44 PM
[NMR images] View this protein\x26#39;s PDB entry
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View this protein\x26#39;s PDB entry
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NMR pictures
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11-01-2010 09:06 AM
CoNSEnsX: an ensemble view of protein structures and NMR-derived experimental data -
CoNSEnsX: an ensemble view of protein structures and NMR-derived experimental data - 7thSpace Interactive (press release)
<img alt="" height="1" width="1" />
CoNSEnsX: an ensemble view of protein structures and NMR-derived experimental data
7thSpace Interactive (press release)
These ensembles are usually substantially more diverse than conventional NMR ensembles and eliminate the expectation that a single conformer should fulfill ...
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Protein dynamics and allostery: an NMR view.
Linear Mode
