3D-Footprint

3D-Footprint analyzes protein–DNA binding specificity by extracting and characterizing interaction interfaces from protein–DNA complexes in the Protein Data Bank (PDB).

Key Features:

• Protein–DNA Interaction Database: Maintains a continuously updated repository of protein–DNA complexes from the Protein Data Bank (PDB) with computed binding specificity profiles.
• Structure-Based Specificity Estimation: Uses complementary algorithms to infer DNA-binding specificity from structural interfaces in protein–DNA complexes.
• Interface Graph and Footprint Logo Generation: Produces graphical representations of protein–DNA interfaces and footprint logos describing nucleotide-binding preferences.
• Integration with Regulatory Databases: Incorporates curated binding information from RegulonDB and TRANSFAC for validation and comparison.
• Protein Similarity and Motif Comparison: Enables identification of DNA-binding proteins with similar structural interfaces and recognition motifs.

Scientific Applications:

• Transcription Factor Binding Analysis: Supports investigation of DNA recognition specificity in protein–DNA complexes.
• Gene Regulation Studies: Enables characterization of transcription factor–DNA interactions underlying regulatory networks.
• Structural Bioinformatics of Protein–DNA Interfaces: Facilitates comparative analysis of structural determinants of protein–DNA binding.

Methodology:

The platform extracts protein–DNA interface information from PDB complexes, applies two complementary algorithms to estimate binding specificity, and generates interface graphs and footprint logos representing nucleotide interaction patterns.