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Elastic effects behind cooperative bonding in beta-sheets.

Jan Rossmeisl¹, Jens K Nørskov, Karsten W Jacobsen

¹Contribution from the Center for Atomic-scale Materials Physics, Technical University of Denmark, DK-2800 Kongens Lyngby, Denmark.

Journal of the American Chemical Society

|October 8, 2004

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Beta-sheet bonding strength increases cooperatively with more strands. This interaction, linked to elastic properties, causes beta-sheet pitch to contract as strand number grows.

Area of Science:

Biophysics
Computational Chemistry
Structural Biology

Background:

Beta-sheets are fundamental protein secondary structures.
Understanding inter-strand interactions is crucial for protein folding and function.

Purpose of the Study:

To investigate the cooperative effects in beta-sheet bonding using computational methods.
To elucidate the relationship between interstrand bonding and intrastrand elastic properties.
To validate computational findings with experimental data.

Main Methods:

Extensive density functional theory (DFT) calculations.
Analysis of structural data from the Protein Data Bank (PDB).

Main Results:

A significant cooperative effect was identified, strengthening with increased strand number.

Related Experiment Videos

A coupling between interstrand bonding and intrastrand elastic properties was revealed.

Beta-sheet pitch was found to contract with increasing strand number, consistent with experimental observations.

Conclusions:

Cooperative effects play a vital role in stabilizing beta-sheet structures.
The interplay between bonding and elasticity governs beta-sheet geometry.
Computational predictions are supported by empirical structural data.