Deuterium Exchange Correction and Analysis (DECA)

Deuterium Exchange Correction and Analysis (DECA) processes hydrogen–deuterium exchange mass spectrometry (HDX-MS) data to correct back-exchange, analyze overlapping peptides, and quantify relative deuterium uptake for protein structural and interaction studies.

Key Features:

• Back-Exchange Correction: Applies algorithms to correct back-exchange effects in HDX-MS datasets to improve accuracy of measured deuterium incorporation.
• Overlapping Peptide Analysis: Resolves overlapping peptide fragments generated during proteolytic digestion to accurately assign deuterium uptake across protein regions.
• Relative Deuterium Uptake Calculation: Computes relative deuterium incorporation levels for peptides to characterize structural dynamics and interaction sites.
• Statistical Evaluation: Performs statistical analysis to assess significant differences in deuterium uptake between experimental conditions.
• HDX-MS Data Visualization: Generates figures representing deuterium uptake and structural changes derived from HDX-MS experiments.

Scientific Applications:

• Protein Structural Dynamics Analysis: Investigates conformational flexibility and dynamic regions of proteins using HDX-MS data.
• Protein–Ligand Interaction Mapping: Identifies ligand-binding regions through changes in peptide deuterium uptake.
• Protein–Protein Interaction Studies: Detects interaction interfaces by comparing deuterium exchange patterns across experimental conditions.
• Allosteric Regulation Research: Reveals long-range conformational changes associated with dynamic allostery in proteins.

Methodology:

DECA analyzes HDX-MS datasets by applying automated back-exchange correction, resolving overlapping peptide signals, calculating relative deuterium uptake values, and performing statistical comparisons of uptake differences between experimental conditions.