O-Glycologue

O-Glycologue simulates O-linked glycosylation biosynthetic networks by modeling enzymatic reactions with a knowledge-based formal-language system to analyze glycan biosynthesis and predict enzyme requirements.

Key Features:

• Simulation of biosynthetic enzymes: Uses regular-expression-based substitutions on string representations of glycans to model enzymatic reactions.
• Formal-language-based modeling: Employs a formal-language-based approach using regular expressions to represent and manipulate glycan structures.
• Flexible input formats: Accepts glycans in GlycoCT condensed format and IUPAC condensed names.
• Network export capability: Exports resulting glycosylation reaction networks as Systems Biology Markup Language (SBML).
• Enzyme knockout analysis: Simulates effects of knocking out different sets of enzyme activities for comparative analysis.
• Predictive modeling: Predicts the set of enzymes required to produce a given substrate, exemplified for an O-glycan from human gastric mucin.
• Adaptation to other glycosylation systems: Has been adapted to model other systems such as ganglioside oligosaccharide synthesis.

Scientific Applications:

• Pathway analysis: Understanding the biochemical pathways involved in glycan synthesis.
• Study of enzyme perturbations: Investigating the impact of enzyme deficiencies or mutations on glycosylation processes.
• Therapeutic target exploration: Exploring potential therapeutic targets within glycosylation pathways.

Methodology:

Models enzymatic reactions using a formal-language-based approach that represents and manipulates glycan structures with regular expressions and applies regular-expression-based substitutions on string representations of glycans.