ARTIST: an activated method in internal coordinate space for sampling protein energy landscapes

Area of Science:

• Computational biology
• Biophysics
• Structural biology

Background:

• Exploring protein conformations is crucial for understanding biological function and designing drugs.
• Existing methods for protein structure sampling have limitations in efficiency and scope.
• Internal coordinate-based methods offer an alternative approach to conformational sampling.

Purpose of the Study:

• To present the first applications of the activation-relaxation technique for internal coordinate space trajectories (ARTIST).
• To demonstrate ARTIST's efficiency in exploring all-atom protein conformations.
• To highlight ARTIST's potential for various applications in computational biology.

Main Methods:

• Application of the activation-relaxation technique in internal coordinate space.
• Identification and crossing of well-defined saddle points connecting energy minima.
• Simulations of four model proteins with varying amino acid lengths (4-47 residues).

Main Results:

• ARTIST efficiently explores protein conformational space in both sparse and dense environments.
• The method successfully samples all-atom protein conformations.
• Simulations on model proteins demonstrate the technique's effectiveness.

Conclusions:

• ARTIST provides a novel and efficient approach for sampling protein conformations.
• The method offers new perspectives for computer-aided drug design and supramolecular assembly.
• ARTIST advances the field of computational protein structure analysis.