Sorting nexin-6 (SNX6)

Sorting nexin-6 (SNX6) is a **member of the sorting nexin protein family** distinguished by a phosphoinositide-binding phox (PX) domain and a C-terminal coiled-coil (and in some cases BAR) domain [1][2][3][5]. **SNX6 is primarily involved in intracellular membrane trafficking**, functioning as part of the retromer complex, where it partners with other SNX proteins—most notably SNX1, SNX2, and SNX5—to mediate the retrograde transport of various cargo proteins from endosomes to the trans-Golgi network and in recycling to the plasma membrane [2][3][5]. This retromer activity is crucial for the correct localization and stability of select transmembrane proteins, including receptors for insulin, platelet-derived growth factor, epidermal growth factor, the leptin receptor, and members of the TGF-beta family [3]. Through these actions, SNX6 influences processes such as nutrient signaling, receptor recycling, and protein sorting for degradation, contributing to a range of cellular homeostatic and signaling functions. SNX6 is not a classical drug target (such as a receptor, enzyme, or channel) but plays a regulatory and scaffolding role essential for maintaining intracellular transport fidelity. Dysregulation or genetic aberration of SNX6 has been implicated in rare developmental diseases and, by analogy to related SNX proteins, may contribute to mechanisms underlying neurodegenerative disorders [2][3].

Other names

Sorting nexin 6TRAF4-associated factor 2MSTP010TFAF2sorting nexin-6SNX6tumor necrosis factor receptor-associated factor 4 (TRAF4)-associated factor 2