Tau-A/SC1 Protein, Rat (HEK293, His)

Microtubule-associated protein tau (MAPT) plays a pivotal role in cellular dynamics by promoting microtubule assembly and stability, potentially contributing to the establishment and maintenance of neuronal polarity. Its functional architecture reveals a dual role, with the C-terminus binding axonal microtubules and the N-terminus engaging neural plasma membrane components, implying that tau acts as a crucial linker protein between the two structures. The predetermined axonal polarity is governed by tau's localization within the neuronal cell, specifically in the domain defined by the centrosome. Notably, the short isoforms of tau confer plasticity to the cytoskeleton, while the longer isoforms may preferentially contribute to its stabilization. MAPT engages in a complex network of interactions with various proteins, including MARK1, MARK2, MARK3, SQSTM1, PSMC2, FKBP4, CSNK1D, SGK1, EPM2A, PIN1, LRRK2, and LRP1, showcasing its multifaceted involvement in cellular processes. Particularly, its interaction with LRP1, leading to endocytosis, underscores the intricate regulatory mechanisms governing tau's functional versatility.