PMID- 20551436 OWN - NLM STAT- MEDLINE DCOM- 20110105 LR - 20211020 IS - 1943-2631 (Electronic) IS - 0016-6731 (Print) IS - 0016-6731 (Linking) VI - 186 IP - 1 DP - 2010 Sep TI - QIP, a protein that converts duplex siRNA into single strands, is required for meiotic silencing by unpaired DNA. PG - 119-26 LID - 10.1534/genetics.110.118273 [doi] AB - RNA interference (RNAi) depends on the production of small RNA to regulate gene expression in eukaryotes. Two RNAi systems exist to control repetitive selfish elements in Neurospora crassa. Quelling targets transgenes during vegetative growth, whereas meiotic silencing by unpaired DNA (MSUD) silences unpaired genes during meiosis. The two mechanisms require common RNAi proteins, such as RNA-directed RNA polymerases, Dicers, and Argonaute slicers. We have previously demonstrated that, while Quelling depends on the redundant dicer activity of DCL-1 and DCL-2, only DCL-1 is required for MSUD. Here, we show that QDE-2-interacting protein (QIP), an exonuclease that is important for the production of single-stranded siRNA during Quelling, is also required for MSUD. QIP is crucial for sexual development and is shown to colocalize with other MSUD proteins in the perinuclear region. FAU - Xiao, Hua AU - Xiao H AD - Division of Biological Sciences, University of Missouri, Columbia, Missouri 65211, USA. FAU - Alexander, William G AU - Alexander WG FAU - Hammond, Thomas M AU - Hammond TM FAU - Boone, Erin C AU - Boone EC FAU - Perdue, Tony D AU - Perdue TD FAU - Pukkila, Patricia J AU - Pukkila PJ FAU - Shiu, Patrick K T AU - Shiu PK LA - eng PT - Journal Article PT - Research Support, N.I.H., Extramural PT - Research Support, Non-U.S. Gov't PT - Research Support, U.S. Gov't, Non-P.H.S. DEP - 20100615 PL - United States TA - Genetics JT - Genetics JID - 0374636 RN - 0 (DNA, Single-Stranded) RN - 0 (RNA, Double-Stranded) RN - 0 (RNA, Small Interfering) RN - EC 3.1.- (Exonucleases) SB - IM MH - Cell Nucleus/metabolism MH - DNA, Single-Stranded/*genetics MH - Exonucleases/genetics/*metabolism MH - Gene Expression Regulation, Fungal MH - *Gene Silencing MH - Homozygote MH - Meiosis/*genetics MH - Neurospora crassa/cytology/enzymology/*genetics/growth & development MH - Protein Transport MH - RNA, Double-Stranded/*metabolism MH - RNA, Small Interfering/genetics/*metabolism PMC - PMC2940280 EDAT- 2010/06/17 06:00 MHDA- 2011/01/06 06:00 PMCR- 2011/09/01 CRDT- 2010/06/17 06:00 PHST- 2010/06/17 06:00 [entrez] PHST- 2010/06/17 06:00 [pubmed] PHST- 2011/01/06 06:00 [medline] PHST- 2011/09/01 00:00 [pmc-release] AID - genetics.110.118273 [pii] AID - gen1861119 [pii] AID - 10.1534/genetics.110.118273 [doi] PST - ppublish SO - Genetics. 2010 Sep;186(1):119-26. doi: 10.1534/genetics.110.118273. Epub 2010 Jun 15.