Tubby bipartite transcription factor (TUB)

Tubby bipartite transcription factor (TUB) is a member of the Tubby family of proteins, primarily expressed in neuronal tissues such as the hypothalamus[1][2][3][4]. It acts as a membrane-bound transcription regulator that responds to cellular signaling, in particular, G protein–coupled receptor (GPCR) pathways via phospholipase C activation, leading to its release from the membrane and translocation to the nucleus where it may regulate gene expression[1][2]. Structurally, the protein contains a characteristic C-terminal tubby domain required for membrane association and an N-terminal domain with transcriptional activation activity[2]. TUB plays critical roles in the regulation of energy balance, obesity susceptibility, neuronal and retinal maintenance, and acts unconventionally in the secreted form to facilitate phagocytosis—particularly relevant in retinal pigment epithelial function and tissue homeostasis[1][2][4]. Loss of function or mutations in TUB have been associated with obesity, insulin resistance, retinal degeneration, altered cilia morphology, and some neurological disorders, but it is not currently considered a direct therapeutic target for drugs[1][2][4].

Other names

Tubby protein homologTUBrd5RDOBtubby bipartite transcription factortubby homologtubby homologue