Self-organization of Plk4 regulates symmetry breaking in centriole duplication.

Abstract:

:During centriole duplication, a single daughter centriole is formed next to the mother centriole. The molecular mechanism that determines a single duplication site remains a long-standing question. Here, we show that intrinsic self-organization of Plk4 is implicated in symmetry breaking in the process of centriole duplication. We demonstrate that Plk4 has an ability to phase-separate into condensates via an intrinsically disordered linker and that the condensation properties of Plk4 are regulated by autophosphorylation. Consistently, the dissociation dynamics of centriolar Plk4 are controlled by autophosphorylation. We further found that autophosphorylated Plk4 is already distributed as a single focus around the mother centriole before the initiation of procentriole formation, and is subsequently targeted for STIL-HsSAS6 loading. Perturbation of Plk4 self-organization affects the asymmetry of centriolar Plk4 distribution and proper centriole duplication. Overall, we propose that the spatial pattern formation of Plk4 is a determinant of a single duplication site per mother centriole.

journal_name

Nat Commun

journal_title

Nature communications

authors

Yamamoto S,Kitagawa D

doi

10.1038/s41467-019-09847-x

subject

Has Abstract

pub_date

2019-04-18 00:00:00

pages

1810

issue

1

issn

2041-1723

pii

10.1038/s41467-019-09847-x

journal_volume

10

pub_type

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