RAId

RAId computes precise E-values and performs computational analysis of tandem mass spectrometry (MS/MS) data to identify peptides and proteins in proteomics studies.

Key Features:

• Precise E-value computation: Calculates exact E-values to quantify peptide and protein identification confidence from database searches.
• Rigorous statistical methodologies: Implements statistical procedures to enhance accuracy and reliability of identifications.
• Database search support: Performs peptide and protein identification via database searches against organismal protein databases.
• MS-product analysis: Analyzes MS-product fragmentation patterns to support peptide identification.
• Molecular isotopic distribution analysis: Computes and analyzes isotopic distributions for molecular species.
• Spectra visualization: Provides visualization of MS/MS spectra as part of analytical inspection.
• Retrieval versus false discovery analysis: Generates graphical representations of retrieval versus false discovery proportions to assess identification performance.
• Knowledge-integrated organismal databases: Utilizes organismal databases integrated with knowledge to support comprehensive proteomic analyses.

Scientific Applications:

• Peptide and protein identification: Identification of peptides and proteins from tandem MS/MS data via database searches.
• Identification confidence assessment: Quantification of identification significance using precise E-values and retrieval versus false discovery analyses.
• Fragmentation and isotopic analysis in proteomics: Analysis of MS-product fragmentation patterns and molecular isotopic distributions to characterize proteomic samples.

Methodology:

Computes precise E-values from database search results using rigorous statistical methodologies, performs MS-product analysis and molecular isotopic distribution analysis, and generates graphical representations of retrieval versus false discovery proportions.