Regulatory Mechanism of a Heat-activated Retrotransposon by DDR Complex in
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The RNA-directed DNA methylation (RdDM) pathway plays an essential role in the transposon silencing mechanism; the DDR complex, consisting of DRD1, DMS3, and RDM1, is an essential component of the RdDM pathway. , identified in , is a retrotransposon activated by heat stress at 37°C; however, studies on the regulation of are limited. In this study, we analyzed the regulation of activity by the DDR complex in . We elucidated that loss of any component of the DDR complex increased transcript levels. Transgenerational transposition of was observed in the DDR-complex mutants treated with heat stress for 48 h. Furthermore, the DDR complex components DRD1, DMS3, and RDM1 played independent roles in suppressing transcription and transposition. Moreover, we found that the duration of heat stress affects activity. Therefore, the results of this study provide new insights into the retrotransposon regulatory mechanisms of the DDR complex in the RdDM pathway.
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PMID: 39511423 PMC: 11624286. DOI: 10.1038/s44319-024-00304-5.
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PMID: 38390294 PMC: 10883384. DOI: 10.3389/fpls.2024.1355626.