CEU Mass Mediator

CEU Mass Mediator identifies and prioritizes candidate metabolites from mass spectrometry data by querying integrated metabolomic databases and applying a rule-based annotation scoring system.

Key Features:

• Integrated Metabolite Database: Searches 279,318 real compounds from databases including the Human Metabolome Database (HMDB), KEGG, and LipidMaps, along with 672,042 simulated compounds from MINE.
• Rule-Based Annotation Scoring: Applies 122 expert-derived rules to score candidate metabolite annotations based on evidence supporting or refuting each match.
• Knowledge-Driven Evidence Evaluation: Extracts and evaluates relationships among candidate annotations using expert knowledge and literature-derived rules.
• Candidate Prioritization: Ranks metabolite annotations according to likelihood scores derived from rule-based evaluation.

Scientific Applications:

• Metabolite Identification: Annotates candidate metabolites from mass spectrometry datasets in metabolomics studies.
• Metabolomics Data Analysis: Supports prioritization of metabolite candidates during biochemical and metabolomic profiling experiments.

Methodology:

CEU Mass Mediator queries metabolite databases using mass spectrometry-derived features and applies a rule-based scoring system composed of 122 expert-defined rules to rank candidate metabolite annotations.