ASPP2 binds Par-3 and controls the polarity and proliferation of neural progenitors during CNS development.

Abstract:

:Cell polarity plays a key role in the development of the central nervous system (CNS). Interestingly, disruption of cell polarity is seen in many cancers. ASPP2 is a haplo-insufficient tumor suppressor and an activator of the p53 family. In this study, we show that ASPP2 controls the polarity and proliferation of neural progenitors in vivo, leading to the formation of neuroblastic rosettes that resemble primitive neuroepithelial tumors. Consistent with its role in cell polarity, ASPP2 influences interkinetic nuclear migration and lamination during CNS development. Mechanistically, ASPP2 maintains the integrity of tight/adherens junctions. ASPP2 binds Par-3 and controls its apical/junctional localization without affecting its expression or Par-3/aPKC lambda binding. The junctional localization of ASPP2 and Par-3 is interdependent, suggesting that they are prime targets for each other. These results identify ASPP2 as a regulator of Par-3, which plays a key role in controlling cell proliferation, polarity, and tissue organization during CNS development.

journal_name

Dev Cell

journal_title

Developmental cell

authors

Sottocornola R,Royer C,Vives V,Tordella L,Zhong S,Wang Y,Ratnayaka I,Shipman M,Cheung A,Gaston-Massuet C,Ferretti P,Molnár Z,Lu X

doi

10.1016/j.devcel.2010.06.003

subject

Has Abstract

pub_date

2010-07-20 00:00:00

pages

126-37

issue

1

eissn

1534-5807

issn

1878-1551

pii

S1534-5807(10)00293-5

journal_volume

19

pub_type

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