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Arabidopsis RETINOBLASTOMA-RELATED and Polycomb group proteins: cooperation during plant cell differentiation and development.

Abstract：

:RETINOBLASTOMA (RB) is a tumour suppressor gene originally discovered in patients that develop eye tumours. The pRb protein is now well established as a key cell-cycle regulator which suppresses G1-S transition via interaction with E2F-DP complexes. pRb function is also required for a wide range of biological processes, including the regulation of stem-cell maintenance, cell differentiation, permanent cell-cycle exit, DNA repair, and genome stability. Such multifunctionality of pRb is thought to be facilitated through interactions with various binding partners in a context-dependent manner. Although the molecular network in which RB controls various biological processes is not fully understood, it has been found that pRb interacts with transcription factors and chromatin modifiers to either suppress or promote the expression of key genes during the switch from cell proliferation to differentiation. RETINOBLASTOMA-RELATED (RBR) is the plant orthologue of RB and is also known to negatively control the G1-S transition. Similar to its animal counterpart, plant RBR has various roles throughout plant development; however, much of its molecular functions outside of the G1-S transition are still unknown. One of the better-characterized molecular mechanisms is the cooperation of RBR with the Polycomb repressive complex 2 (PRC2) during plant-specific developmental events. This review summarizes the current understanding of this cooperation and focuses on the processes in Arabidopsis in which the RBR-PRC2 cooperation facilitates cell differentiation and developmental transitions.

journal_name

J Exp Bot

journal_title

Journal of experimental botany

authors

Kuwabara A,Gruissem W

doi

10.1093/jxb/eru069

subject

Has Abstract

pub_date

2014-06-01 00:00:00

pages

2667-76

issue

10

eissn

0022-0957

issn

1460-2431

pii

eru069

journal_volume

65

pub_type

杂志文章,评审

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