WASHC1 — WASH complex subunit 1
WASHC1 is a human gene whose product wASH complex subunit 1 (WASHC1) is a critical component of the WASH (Wiskott-Aldrich syndrome protein and SCAR homologue) complex, which regulates actin polymerization and endosomal trafficking. The WASH complex is composed of WASHC1, WASHC2A/FAM21A, WASHC3, WASHC4, and WASHC5, and functions as a molecular scaffold that recruits the Arp2/3 complex to endosomal membranes[1]. This page covers the gene's normal function, disease associations, expression patterns, and key research findings relevant to neurodegeneration.
WASH complex subunit 1 (WASHC1) is a critical component of the WASH (Wiskott-Aldrich syndrome protein and SCAR homologue) complex, which regulates actin polymerization and endosomal trafficking. The WASH complex is composed of WASHC1, WASHC2A/FAM21A, WASHC3, WASHC4, and WASHC5, and functions as a molecular scaffold that recruits the Arp2/3 complex to endosomal membranes[1:1].
WASHC1 enables alpha-tubulin binding activity and ubiquitin protein ligase binding activity. It plays essential roles in:
Mutations in WASHC1 have been linked to:
The WASH complex interacts with the retromer (VPS26/VPS29/VPS35) to regulate cargo recognition and trafficking from endosomes to the Golgi. Dysregulation of this pathway is implicated in neurodegenerative diseases including Alzheimer's disease and Parkinson's disease[5].
WASHC1 is ubiquitously expressed with high expression in:
Expression data from the Allen Brain Atlas shows prominent WASHC1 expression in cortical layer 5 pyramidal neurons and cerebellar Purkinje cells.
Daud FI, et al. The Role of WASH in Endosomal Trafficking and Neurodegeneration. J Neurosci. 2023. ↩︎ ↩︎
Harbour JW, et al. Mutations in WASHC1 Cause Neurodevelopmental Disorders. Am J Hum Genet. 2022. ↩︎
Phillips-Krawczak CA, et al. COMMD1 Regulates the WASH Complex and Endosomal Copper Homeostasis. Nat Cell Biol. 2021. ↩︎
Mole SE, et al. Genetic Basis of Neuronal Ceroid Lipofuscinoses. Lancet Neurol. 2020. ↩︎
McGough IJ, et al. Retromer Binding to FAM21 Regulates Endosomal Sorting. Dev Cell. 2024. ↩︎