PT  - JOURNAL ARTICLE
AU  - Ming Wang
AU  - Zhenhui Zhong
AU  - Javier Gallego-Bartolomé
AU  - Suhua Feng
AU  - Yuan-Hsin Shih
AU  - Mukun Liu
AU  - Jessica Zhou
AU  - John Curtis Richey
AU  - Charmaine Ng
AU  - Yasaman Jami-Alahmadi
AU  - James Wohlschlegel
AU  - Keqiang Wu
AU  - Steven E. Jacobsen
TI  - Arabidopsis TRB proteins function in H3K4me3 demethylation by recruiting JMJ14
AID  - 10.1101/2023.01.10.523456
DP  - 2023 Jan 01
TA  - bioRxiv
PG  - 2023.01.10.523456
4099  - http://biorxiv.org/content/early/2023/01/10/2023.01.10.523456.short
4100  - http://biorxiv.org/content/early/2023/01/10/2023.01.10.523456.full
AB  - Arabidopsis telomeric repeat binding factors (TRBs) can bind telomeric DNA sequences to protect telomeres from degradation. TRBs can also recruit Polycomb Repressive Complex 2 (PRC2) to deposit tri-methylation of H3 lysine 27 (H3K27me3) over certain target loci. Here, we demonstrate that TRBs also associate and colocalize with JUMONJI14 (JMJ14) and trigger H3K4me3 demethylation at some loci. The trb1/2/3 triple mutant and the jmj14-1 mutant show an increased level of H3K4me3 over TRB and JMJ14 binding sites, resulting in up-regulation of their target genes. Furthermore, tethering TRBs to the promoter region of genes with an artificial zinc finger (TRB-ZF) successfully triggers target gene silencing, as well as H3K27me3 deposition, and H3K4me3 removal. Interestingly, JMJ14 is predominantly recruited to ZF off-target sites with low levels of H3K4me3, which is accompanied with TRB-ZFs triggered H3K4me3 removal at these loci. These results suggest that TRB proteins coordinate PRC2 and JMJ14 activities to repress target genes via H3K27me3 deposition and H3K4me3 removal.Competing Interest StatementThe authors have declared no competing interest.