ReadOut

ReadOut computes direct and indirect readout energy Z-scores to quantify sequence specificity in protein-DNA complexes.

Key Features:

• Direct and Indirect Readout Analysis: Quantifies specificity by analyzing base-amino acid interactions for direct readout and sequence-dependent DNA conformation for indirect readout.
• Z-Score Calculation: Calculates energy Z-scores that measure protein-DNA binding specificity relative to random sequences and assess effects of base mutations and differences between cognate and non-cognate complexes.
• Statistical Empirical Potentials: Derives empirical interaction potentials from structural protein-DNA data to inform predictions of amino acid-DNA interactions and DNA target preferences of regulatory proteins.
• Combinatorial Threading Procedure: Evaluates compatibility between DNA sequences and protein-DNA complex structures via a combinatorial threading procedure to aid binding site prediction.
• Input and Output Data: Accepts Protein Data Bank (PDB) style coordinate data or PDB codes as input and outputs total energy Z-scores with decomposed interaction energies and DNA conformational contributions.

Scientific Applications:

• Protein-DNA Recognition: Partitions the relative contributions of direct and indirect readout to sequence specificity across protein-DNA complexes.
• Structural Analysis: Examines structural differences between symmetric/asymmetric and cognate/non-cognate bindings and their influence on specificity.
• Predictive Modeling: Predicts DNA target sites for regulatory proteins by analyzing spatial distributions of amino acids around bases and applying derived empirical potentials.
• Quality Assessment: Evaluates protein-DNA complex structures by checking modeled interaction energies and sequence specificities.

Methodology:

Computes direct and indirect readout energy Z-scores using statistical analyses of structural databases; derives statistical empirical interaction potentials from structural data; and applies a combinatorial threading procedure to evaluate sequence-structure compatibility.