Vernalization-Triggered Intragenic Chromatin Loop Formation by Long Noncoding RNAs

Overview

Journal Dev Cell

Publisher Cell Press

Specialties Cell Biology
Reproductive Medicine

Date 2017 Jan 31

PMID 28132848

Citations 125

Authors

Dong-Hwan Kim

Sibum Sung

Affiliations

Soon will be listed here.

Abstract

Long noncoding RNAs (lncRNAs) affect gene regulation through structural and regulatory interactions with associated proteins. The Polycomb complex often binds to lncRNAs in eukaryotes, and an lncRNA, COLDAIR, associates with Polycomb to mediate silencing of the floral repressor FLOWERING LOCUS C (FLC) during the process of vernalization in Arabidopsis. Here, we identified an additional Polycomb-binding lncRNA, COLDWRAP. COLDWRAP is derived from the repressed promoter of FLC and is necessary for the establishment of the stable repressed state of FLC by vernalization. Both COLDAIR and COLDWRAP are required to form a repressive intragenic chromatin loop at the FLC locus by vernalization. Our results indicate that vernalization-mediated Polycomb silencing is coordinated by lncRNAs in a cooperative manner to form a stable repressive chromatin structure.

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