Cell Biology of Canonical Wnt Signaling.
Annu Rev Cell Dev Biol
; 37: 369-389, 2021 10 06.
Article
en En
| MEDLINE
| ID: mdl-34196570
ABSTRACT
Wnt signaling has multiple functions beyond the transcriptional effects of ß-catenin stabilization. We review recent investigations that uncover new cell physiological effects through the regulation of Wnt receptor endocytosis, Wnt-induced stabilization of proteins (Wnt-STOP), macropinocytosis, increase in lysosomal activity, and metabolic changes. Many of these growth-promoting effects of canonical Wnt occur within minutes and are independent of new protein synthesis. A key element is the sequestration of glycogen synthase kinase 3 (GSK3) inside multivesicular bodies and lysosomes. Twenty percent of human proteins contain consecutive GSK3 phosphorylation motifs, which in the absence of Wnt can form phosphodegrons for polyubiquitination and proteasomal degradation. Wnt signaling by either the pharmacological inhibition of GSK3 or the loss of tumor-suppressor proteins, such as adenomatous polyposis coli (APC) and Axin1, increases lysosomal acidification, anabolic metabolites, and macropinocytosis, which is normally repressed by the GSK3-Axin1-APC destruction complex. The combination of these cell physiological effects drives cell growth.
Palabras clave
Texto completo:
1
Colección:
01-internacional
Banco de datos:
MEDLINE
Asunto principal:
Glucógeno Sintasa Quinasa 3
/
Vía de Señalización Wnt
Límite:
Humans
Idioma:
En
Revista:
Annu Rev Cell Dev Biol
Asunto de la revista:
BIOLOGIA
Año:
2021
Tipo del documento:
Article