An RNA-dependent RNA polymerase is required for paramutation in maize

Mary Alleman, Lyudmila Sidorenko, Karen McGinnis, Vishwas Seshadri, Jane E. Dorweiler, Joshua White, Kristin Sikkink and Vicki L. Chandler ()
Additional contact information
Mary Alleman: University of Arizona
Lyudmila Sidorenko: University of Arizona
Karen McGinnis: University of Arizona
Vishwas Seshadri: University of Arizona
Jane E. Dorweiler: University of Arizona
Joshua White: University of Arizona
Kristin Sikkink: University of Arizona
Vicki L. Chandler: University of Arizona

Nature, 2006, vol. 442, issue 7100, 295-298

Abstract: How maize bends the rules Paramutation, first discovered in maize in the 1950s and since found in other plants, fungi, and even mice, is an inheritance pattern that breaks the rules. Most of the time Mendel's law holds sway, and gene pairs sort independently. Paramutation is an interaction in which one silent allele of a gene 'mutates' the actively expressed allele, so that it too is silenced. New work in maize now shows that paramutation is RNA-directed. Stability of the chromatin states associated with paramutation and transposon silencing requires the mop1 gene, which encodes an RNA-dependent RNA polymerase.

Date: 2006
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DOI: 10.1038/nature04884

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