Article
RNA polymerase IV directs silencing of endogenous DNA.
Science (New York, N.Y.) - 1 Apr 2005
Herr A J, Jensen M B, Dalmay T, Baulcombe D C
Abstract excerpt
Plants encode subunits for a fourth RNA polymerase (Pol IV) in addition to the well-known DNA-dependent RNA polymerases I, II, and III. By mutation of the two largest subunits (NRPD1a and NRPD2), we show that Pol IV silences certain transposons and repetitive DNA in a short interfering RNA pathway involving RNA-dependent RNA polymerase 2 and Dicer-like 3. The existence of this distinct silencing polymerase may...
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