14-3-3 protein:vesicle trafficking client protein complex (14-3-3:VTC complex)

The 14-3-3 protein:vesicle trafficking client protein complex is a regulatory assembly consisting of a 14-3-3 protein dimer and a phosphorylated client protein involved in intracellular transport [1][2]. 14-3-3 proteins are highly conserved adapter molecules that recognize specific phosphoserine or phosphothreonine motifs, thereby influencing the client's conformation and subcellular localization [3]. In the context of vesicle trafficking, 14-3-3 binding often facilitates the exit of membrane proteins, such as ion channels and transporters, from the endoplasmic reticulum (ER) by masking ER-retention signals or promoting forward transport to the plasma membrane [2][4]. This mechanism is critical for maintaining the correct surface density of proteins like the CFTR chloride channel and TASK potassium channels [5]. Dysregulation of these complexes is associated with various pathologies, including cystic fibrosis, cardiac arrhythmias, and neurodegenerative diseases [1][2]. Therapeutic intervention strategies involve the use of small-molecule "molecular glues," such as fusicoccin, to stabilize the 14-3-3:client interaction and enhance protein trafficking, or inhibitors to disrupt interactions that drive disease progression in cancer [1][3]. References: [1] Stevers et al. (2018) J Med Chem; [2] de Boer et al. (2013) Biol Rev; [3] Ottmann (2013) Semin Cancer Biol; [4] Smith et al. (2011) Biochem Soc Trans; [5] Bier et al. (2013) ChemMedChem.

Other names

14-3-3:cargo complex14-3-3:membrane protein complex14-3-3:trafficking protein interaction14-3-3:VTC complex

Stabilization or inhibition of the protein-protein interaction between 14-3-3 proteins and phosphorylated client proteins to modulate their subcellular localization and surface expression.