Par3/bazooka binds NICD and promotes notch signaling during Drosophila development.
Dev Biol
; 514: 37-49, 2024 Oct.
Article
en En
| MEDLINE
| ID: mdl-38885804
ABSTRACT
The conserved bazooka (baz/par3) gene acts as a key regulator of asymmetrical cell divisions across the animal kingdom. Associated Par3/Baz-Par6-aPKC protein complexes are also well known for their role in the establishment of apical/basal cell polarity in epithelial cells. Here we define a novel, positive function of Baz/Par3 in the Notch pathway. Using Drosophila wing and eye development, we demonstrate that Baz is required for Notch signaling activity and optimal transcriptional activation of Notch target genes. Baz appears to act independently of aPKC in these contexts, as knockdown of aPKC does not cause Notch loss-of-function phenotypes. Using transgenic Notch constructs, our data positions Baz activity downstream of activating Notch cleavage steps and upstream of Su(H)/CSL transcription factor complex activity on Notch target genes. We demonstrate a biochemical interaction between NICD and Baz, suggesting that Baz is required for NICD activity before NICD binds to Su(H). Taken together, our data define a novel role of the polarity protein Baz/Par3, as a positive and direct regulator of Notch signaling through its interaction with NICD.
Palabras clave
Texto completo:
1
Bases de datos:
MEDLINE
Asunto principal:
Alas de Animales
/
Transducción de Señal
/
Proteínas de Drosophila
/
Receptores Notch
Límite:
Animals
Idioma:
En
Revista:
Dev Biol
Año:
2024
Tipo del documento:
Article
País de afiliación:
Estados Unidos