Proximity-dependent biotin identification (BioID) screening identified novel layilin-proximal proteins

Area of Science:

• Cell Biology
• Molecular Biology
• Proteomics

Background:

• Layilin, a transmembrane protein, is involved in cell motility, mitochondrial regulation, immune responses, and ciliogenesis.
• Understanding layilin's functions requires identifying its interacting proteins, but this information is limited.
• This study aimed to comprehensively identify layilin-interacting proteins.

Purpose of the Study:

• To identify proteins that interact with layilin using proximity-dependent biotin identification (BioID).
• To gain insights into the intracellular network and functions of layilin.

Main Methods:

• A BioID2-layilin fusion protein was expressed in HEK293 cells to biotinylate proximal proteins.
• Biotinylated peptides were purified and analyzed using liquid chromatography-tandem mass spectrometry (LC-MS/MS).
• Identified proteins underwent Gene Ontology (GO) enrichment analysis.

Main Results:

• 173 proteins were identified in the BioID2-layilin group, with 19 exclusively identified.
• 18 layilin-proximal proteins were identified, excluding the bait protein.
• GO analysis indicated enrichment in protein folding and localization pathways.

Conclusions:

• BioID screening successfully identified potential layilin interactors.
• These findings provide a foundation for future research on layilin's molecular mechanisms and functions.