LinX

LinX identifies and quantifies intermolecular cross-links from mass spectrometric datasets of chemical cross-linking experiments to analyze homodimer interaction interfaces.

Key Features:

• High Mass Accuracy: Leverages high mass accuracy for precise ion identification to distinguish complex molecular interactions.
• Homodimer Interaction Analysis: Facilitates elucidation of cross-linked peptides originating from homodimers labeled with 14N/15N, including determination of isotope ratios and identification within protein–nucleic acid complexes.
• Intermolecular Cross-link Identification and Quantification: Implements an algorithm tailored to identify and quantify intermolecular cross-links at homodimer interaction interfaces.
• Implementation: Implemented in Java for processing mass spectrometric datasets from chemical cross-linking experiments.

Scientific Applications:

• Structural Biology: Mapping protein–protein interaction interfaces of homodimers to inform structural models.
• Protein–Nucleic Acid Complex Analysis: Identifying cross-links within protein–nucleic acid complexes to support structural characterization.
• Quantitative Interaction Studies: Using 14N/15N isotopic ratios to quantify interaction stoichiometry relevant to studies of molecular mechanisms and therapeutic target investigation.

Methodology:

Processes mass spectrometric data to identify cross-linked peptides using an algorithm tailored for complex datasets, relying on high mass accuracy, isotopic labeling (14N/15N), and advanced ion identification techniques.