Proximity labeling of tau interactions in primary neurons and mouse brain

Microtubule-associated protein tau is a central factor in Alzheimer’s disease and other tauopathies. However, physiological functions of tau are unclear. Here, we used proximity labelling proteomics to chart functional tau interactomes in primary neurons and mouse brain in vivo. Here, we use proximity labelling with the biotin ligase BioID2 to map interactomes of tau in neurons. Data sets relate to mass spectrometry and protein identification of biotinylated proteins in primary neurons and in mouse brain after delivery of BioID2-tau fusion protein or BioID2 control protein by adeno-associated virus (AAV). Mouse brain samples are either from P35 wild-type mice with intracranial AAV delivery at P0 or from tau knockout mice at P60 after hippocampal delivery of AAV. Details on BioID2 fusion protein expression, biotin supplementation and sample extraction can be obtained in the associated publication.