Ontology highlight
ABSTRACT:
ORGANISM(S): Arabidopsis thaliana
SUBMITTER: Frank Schwach
PROVIDER: E-GEOD-10180 | biostudies-arrayexpress |
REPOSITORIES: biostudies-arrayexpress
Mosher Rebecca A RA Schwach Frank F Studholme David D Baulcombe David C DC
Proceedings of the National Academy of Sciences of the United States of America 20080219 8
DNA-dependent RNA polymerase (Pol)IV in Arabidopsis exists in two isoforms (PolIVa and PolIVb), with NRPD1a and NRPD1b as their respective largest subunits. Both isoforms are implicated in production and activity of siRNAs and in RNA-directed DNA methylation (RdDM). Deep sequence analysis of siRNAs in WT Arabidopsis flowers and in nrpd1a and nrpd1b mutants identified >4,200 loci producing siRNAs in a PolIV-dependent manner, with PolIVb reinforcing siRNA production by PolIVa. Transposable element ...[more]