ProtDes

ProtDes optimizes amino-acid substitutions in protein structures to improve stability by minimizing folding free energy and exploring conformational space with molecular dynamics.

Key Features:

• Automated Mutation: Automatically mutates specified residue positions in a protein structure.
• Optimization of Amino Acids: Identifies amino acids that optimize folding free energy to enhance protein stability and function.
• Integration with Molecular Dynamics: Integrates molecular dynamics simulations to explore conformational space and assess mutation effects.
• Heuristic Optimization Algorithm: Employs an iterative heuristic optimization algorithm to search amino-acid sequences and conformations across specified positions.

Scientific Applications:

• Protein design via folding free energy optimization: Enables design of proteins with desired properties through optimization of folding free energy.
• Prediction of stable protein structures: Aids prediction of stable protein structures by identifying substitutions that reduce folding free energy.
• Functional analysis of proteins: Supports investigation of protein function by generating stabilized variants for functional studies.
• Engineering novel proteins: Facilitates engineering of novel proteins with specific characteristics by selecting stabilizing amino-acid substitutions.

Methodology:

Uses a CHARMM-based framework with the CHARMM force field; implements energy functions with solvent treatments including surface area accessibility, generalized Born using molecular volume, and an effective energy function; integrates molecular dynamics simulations; applies an iterative heuristic optimization algorithm; and supports customization of energy functions for bespoke protein design procedures.