Functional divergence in the growing family of RNA polymerases.
In plants, unorthodox multisubunit RNA polymerases (RNAPs) play key roles in small interfering RNA (siRNA) genesis and function. In a recent issue of Molecular Cell, Ream et al. (2009) established a 12-subunit composition for Arabidopsis RNAPIV and RNAPV. Subunit and sequence divergence between RNAPIV-V and RNAPI-III suggests significant functional deviation of these intriguing RNAPs.
Landick
Robert
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D000595:Amino Acid Sequence; D029681:Arabidopsis Proteins / Q000737:chemistry* / Q000378:metabolism; D017124:Conserved Sequence; D012321:DNA-Directed RNA Polymerases / Q000737:chemistry* / Q000378:metabolism; D008958:Models, Molecular; D008969:Molecular Sequence Data; D034741:RNA, Small Interfering / Q000378:metabolism
D029681:Arabidopsis Proteins; D034741:RNA, Small Interfering; D012321:DNA-Directed RNA Polymerases