Related Experiment Video
Updated: Jun 8, 2026

Investigating Receptor-ligand Systems of the Cellulosome with AFM-based Single-molecule Force Spectroscopy
Published on: December 20, 2013
Enzyme structure dynamics of xylanase I from Trichoderma longibrachiatum
Ugur Uzuner1, Weibing Shi, Lantao Liu
1Department of Plant Pathology and Microbiology, Texas A&M University, College Station, TX 77843, USA.
Hydrogen deuterium exchange (HDX) mass spectrometry reveals significant enzyme dynamics and ligand-induced stabilization in xylanase. This powerful technique can guide the rational design of cell wall degrading enzymes.
Area of Science:
- Biochemistry
- Structural Biology
- Enzymology
Background:
- Enzyme dynamics are critical for understanding enzyme function and structure.
- Hydrogen deuterium exchange (HDX) mass spectrometry is a high-throughput method for analyzing protein dynamics.
- HDX mass spectrometry has been underexplored for studying cell wall degrading enzymes.
Purpose of the Study:
- To explore the potential of HDX mass spectrometry for analyzing cell wall degrading enzymes using xylanase as a model.
- To investigate the regional structure dynamics of xylanase upon ligand binding.
Main Methods:
- HDX mass spectrometry was employed to analyze xylanase dynamics.
- Xylanase was studied in its apo form and in complex with xylohexaose and xylan.
Main Results:
- HDX mass spectrometry revealed significant intrinsic dynamics in xylanase.
- Xylohexaose binding significantly stabilized multiple enzyme regions, including those near the active site.
- Xylan binding offered less protection compared to xylohexaose, potentially due to substrate insolubility.
Conclusions:
- Ligand binding induces significant regional and global stabilization in enzymes like xylanase.
- HDX mass spectrometry is a powerful tool for identifying ligand-protected regions and elucidating enzyme mechanisms.
- This study establishes HDX mass spectrometry as a novel platform for guiding the rational design of cell wall degrading enzymes.
More Related Videos
08:49Incorporating Target Protein Structure Flexibility and Dynamics in Computational Drug Discovery Using Ensemble-Based Docking Analysis
Published on: June 20, 2025
11:27X-Ray Crystallography to Study the Oligomeric State Transition of the Thermotoga maritima M42 Aminopeptidase TmPep1050
Published on: May 13, 2020
Related Concept Videos
Enzyme Kinetics
Scientists typically study enzyme kinetics with a fixed amount of enzyme in the controlled environment of a test tube. When more reactant, or substrate, is...
Protein and Protein Structure
A protein's shape is critical to its function. For example, an enzyme can...
ATP Synthase: Structure
Introduction to Mechanisms of Enzyme Catalysis
Enzymes
Enzyme deficiencies can often translate into life-threatening diseases. For example, a genetic abnormality resulting in the deficiency of the enzyme G6PD...
Protein Folding