Full-length autonomous transposable elements are preferentially targeted by expression-dependent forms of RNA-directed DNA methylation
Background Chromatin modifications such as DNA methylation are targeted to transposable
elements by small RNAs in a process termed RNA-directed DNA methylation (RdDM). In
plants, canonical RdDM functions through RNA polymerase IV to reinforce pre-existing
transposable element silencing. Recent investigations have identified a “non-canonical”
form of RdDM dependent on RNA polymerase II expression to initiate and re-establish
silencing of active transposable elements. This expression-dependent RdDM mechanism …
elements by small RNAs in a process termed RNA-directed DNA methylation (RdDM). In
plants, canonical RdDM functions through RNA polymerase IV to reinforce pre-existing
transposable element silencing. Recent investigations have identified a “non-canonical”
form of RdDM dependent on RNA polymerase II expression to initiate and re-establish
silencing of active transposable elements. This expression-dependent RdDM mechanism …
[引用][C] Full-length autonomous transposable elements are preferentially targeted by expression-dependent forms of RNA-directed DNA methylation
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