AP1G1 (Adaptor Related Protein Complex 1 Subunit Gamma 1) encodes the gamma-1 subunit of the AP-1 complex, a key component of clathrin-coated vesicles involved in protein trafficking between the Golgi apparatus, endosomes, and the plasma membrane. [@burns2020]
Gene Information
Symbol: AP1G1
Full Name: Adaptor Related Protein Complex 1 Subunit Gamma 1
AP1G1 encodes the gamma-1 subunit of the AP-1 complex, which is involved in clathrin-mediated endocytosis and intracellular protein trafficking. [@liu2014]
AP1G1 (Adaptor Related Protein Complex 1 Subunit Gamma 1) encodes the gamma-1 subunit of the AP-1 complex, a key component of clathrin-coated vesicles involved in protein trafficking between the Golgi apparatus, endosomes, and the plasma membrane. [@burns2020]
Gene Information
Symbol: AP1G1
Full Name: Adaptor Related Protein Complex 1 Subunit Gamma 1
AP1G1 encodes the gamma-1 subunit of the AP-1 complex, which is involved in clathrin-mediated endocytosis and intracellular protein trafficking. [@liu2014]
Key Functions
Clathrin-Coated Vesicle Formation: Essential component of AP-1 clathrin adaptor complex.
Protein Sorting: Directs cargo proteins to appropriate intracellular compartments.
Endosomal Trafficking: Facilitates transport between Golgi and endosomes.
Synaptic Vesicle Recycling: Critical for replenishment of synaptic vesicle components.
Membrane Protein Recycling: Involved in receptor recycling at the plasma membrane.
Disease Associations
Neurodegenerative Disease Connections
[Alzheimer's Disease](/diseases/alzheimers-disease): AP1G1 variants may affect [amyloid precursor protein](/entities/app-protein) (APP) trafficking and processing. Altered endosomal trafficking is an early hallmark of AD.
[Parkinson's Disease](/diseases/parkinsons-disease): Dysregulation of AP-1-mediated trafficking may impact synaptic function and neuronal survival.
Huntington's Disease: Altered adaptor protein function may contribute to mutant [huntingtin](/proteins/huntingtin) aggregation and trafficking defects.
ALS: Endosomal trafficking defects implicated in motor neuron degeneration.
Other Conditions
Cancer: AP1G1 dysregulation reported in various cancers.
Metabolic Disorders: Altered membrane protein trafficking affects insulin receptor signaling.
Expression
AP1G1 is ubiquitously expressed with high levels in: [@he2021]
Burns ME, Richmond R, Burr J, et al, Munc18-1 and Munc18-2 proteins modulate the Ca2+ sensitivity of neurotransmitter release (2020)
Liu Y, Graham C, Li A, et al, Munc18-2 deficiency causes familial hemophagocytic lymphohistiocytosis type 5 and impairs cytotoxic granule exocytosis (2014)
He E, Xu K, Deng Q, et al, Syntaxin-binding proteins Munc18-1 and Munc18-2: potential therapeutic targets for neurodegenerative diseases (2021)
Robinson MS, Adaptor protein complexes and the synapse (2021)
Bonifacino JS, Traub LM, Signals for sorting of transmembrane proteins to endosomes and lysosomes (2003)
Wang G, Niu Y, Zhang P, et al, VAMP6 regulates extracellular vesicle-mediated sterile inflammation (2023)
Xu H, Moomaw JF, Rong C, et al, VAMP6 is required for maintenance of dendritic spine morphology and synaptic protein trafficking (2022)
Teng H, Lin MY, Role of VAMP6 in vesicular transport and neurodevelopmental disorders (2024)