HomolWat

HomolWat incorporates homologous internal water molecules into G protein-coupled receptor (GPCR) three-dimensional structures to improve structural completeness for downstream docking and molecular dynamics simulations.

Key Features:

• Template-based modeling: Employs a template-based modeling approach to transfer water molecules from homologous GPCR structures into target structures.
• Internal water focus: Targets internal (buried) water molecules that are crucial for GPCR structure and function.
• High-resolution templates: Leverages high-resolution structures of homologous GPCRs as sources of conserved water positions.
• Alternative to energy-based methods: Inserts waters by homology transfer rather than predicting positions using energy-based algorithms.
• Recovery rate: Achieves approximately 85% recovery of internal waters reported in template structures.
• Computational efficiency: Typically completes water incorporation in about one minute per structure.

Scientific Applications:

• Molecular docking: Provides a more complete protein environment to improve the realism of docking calculations.
• Molecular dynamics simulations: Supplies internal waters for more accurate starting models in MD simulations.
• Structural analysis of GPCRs: Enhances interpretation and refinement of experimental GPCR 3D structures by restoring conserved internal waters.

Methodology:

Uses template-based modeling to introduce missing internal water molecules by borrowing waters from high-resolution homologous GPCR structures rather than predicting positions with energy-based methods.