PoreWalker

PoreWalker characterizes transmembrane protein channels from 3D structural coordinates by detecting pore centers and axes and quantifying pore geometry and cavity pathways.

Key Features:

• Automated Detection and Characterization: Identification and optimization of the pore center and axis using geometric criteria applied to 3D structural coordinates.
• Cavity Detection: Detection of the largest and longest cavity through the channel to define potential transport pathways.
• Quantitative and Visual Characterization: Calculation of diameter profiles, pore-lining residues, pore size, shape, and regularity, with corresponding visual representations.
• Application to Channel Families: Analysis of multiple transmembrane channel structures to identify family-characteristic features such as shape, size, and residue composition.

Scientific Applications:

• Structure–Function Analysis: Detailed pore characterizations to support studies of structure–function relationships in transmembrane channels.
• Comparative and Functional Analysis: Identification of family-specific geometric and residue features for comparative studies across channel families.
• Mechanistic Insights into Transport: Analysis of pore geometry and lining residues to inform understanding of ion and molecule transport and membrane biology.

Methodology:

Initial geometric optimization to determine the pore center and axis, followed by detection of the largest cavity through the channel and calculation of pore features including diameter profiles, pore-lining residues, pore size, shape, and regularity.