Bridge

Bridge analyzes hydrogen-bond networks in membrane proteins, identifying protein–water hydrogen-bond pathways and transient long-distance bridges relevant to proton transfer in transporters, receptors, and proteins such as channelrhodopsin.

Key Features:

• Graph-Based Analysis: Employs a graph-based algorithm to map and analyze hydrogen-bond networks in membrane proteins.
• Efficient Network Identification: Identifies extensive networks of protein–water hydrogen bonds that are critical for proton transfer reactions in proteins like channelrhodopsin.
• Dynamic Structural Insights: Reveals transient networks that can bridge two proton donors over distances up to approximately 20 Å, indicating long-distance communication within membrane proteins.

Scientific Applications:

• Structural Biology and Numerical Simulations: Elucidates hydrogen-bond networks to support structural analysis and numerical simulations of membrane proteins.
• Protein Dynamics Analysis: Tracks rapid propagation of structural changes within hydrogen-bond networks, including in mutant transporters, to investigate groups important for proton transfer activities.

Methodology:

Utilizes a tailored graph-based algorithm to analyze hydrogen-bond networks and generates graphical representations of these bonds to visualize dynamic interactions.