Article ID | Journal | Published Year | Pages | File Type |
---|---|---|---|---|
10798962 | Biochimica et Biophysica Acta (BBA) - Gene Regulatory Mechanisms | 2016 | 38 Pages |
Abstract
Using the evolutionary early-diverged land plant model species Physcomitrella patens we show that abolishment of a single copy gene PpCLF, as well as an additional member of the PcG complex, FERTILIZATION-INDEPENDENT ENDOSPERM (PpFIE), results in a specific loss of tri-methylation of H3K27. Using site-directed mutagenesis of key residues, we revealed that H3K27 tri-methylation is mediated by the SET domain of the CLF protein. Moreover, the abolishment of H3K27me3 led to enhanced expression of transcription factor genes. This in turn led to the development of fertilization-independent sporophyte-like structures, as observed in PpCLF and PpFIE null mutants. Overall, our results demonstrate the role of PpCLF as a SET protein in tri-methylation of H3K27 in-vivo and the importance of this modification in regulating the expression of transcription factor genes involved in developmental programs of P. patens.
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Authors
Idan Pereman, Assaf Mosquna, Aviva Katz, Gertrud Wiedemann, Daniel Lang, Eva L. Decker, Yosuke Tamada, Takaaki Ishikawa, Tomoaki Nishiyama, Mitsuyasu Hasebe, Ralf Reski, Nir Ohad,