Protein TFG

Protein TFG (Trafficking Factor TFG) is a 400-amino acid regulatory protein essential for endoplasmic reticulum (ER) dynamics and vesicular transport. It plays a critical role in the normal function of the ER and its associated microtubules, and is required for secretory cargo traffic from the ER to the Golgi apparatus (UniProt: Q92734).

TFG is primarily characterized by its involvement in protein trafficking pathways. Mutations in TFG are associated with hereditary neurodegenerative disorders, including Neuropathy, Hereditary Motor and Sensory, Okinawa type (HMSNO) and Spastic Paraplegia 57 (SPG57), both presenting with progressive neurological dysfunction (UniProt: Q92734). These disease associations underscore the protein's importance in neuronal homeostasis and intracellular transport.

In Alzheimer's Disease, TFG is upregulated in post-mortem AD brain tissue compared to age-matched controls, with a mean log2 fold-change of 0.281 across subcellular fractions (Chaparral AD proteomics). This elevation may reflect compensatory responses or ER stress-related changes in AD pathology, linking TFG to broader neurodegenerative processes relevant to Alzheimer's disease.