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MIWI catalysis is required for piRNA amplification-independent LINE1 transposon silencing [deep sequencing]

ABSTRACT: Here we show that MIWI is a small RNA-guided ribonuclease (Slicer) that requires extensive complementarity for target cleavage in vitro. Disruption of its catalytic activity in mice by a single point mutation results in male infertility and displays increased accumulation of LINE1 transposon transcripts. MIWI-associated piRNAs from different genotypes were sequenced. Total RNA from purified round spermatids were subjected to Ribozero purification and strand-specific RNAseq lib prepared. Global 5' RACE library was prepare from indicated genotypes.

ORGANISM(S): Mus musculus

SUBMITTER: Ramesh Pillai

PROVIDER: E-GEOD-32184 | biostudies-arrayexpress |

REPOSITORIES: biostudies-arrayexpress

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Miwi catalysis is required for piRNA amplification-independent LINE1 transposon silencing.

Reuter Michael M Berninger Philipp P Chuma Shinichiro S Shah Hardik H Hosokawa Mihoko M Funaya Charlotta C Antony Claude C Sachidanandam Ravi R Pillai Ramesh S RS

Nature 20111127 7376

Repetitive-element-derived Piwi-interacting RNAs (piRNAs) act together with Piwi proteins Mili (also known as Piwil2) and Miwi2 (also known as Piwil4) in a genome defence mechanism that initiates transposon silencing via DNA methylation in the mouse male embryonic germ line. This silencing depends on the participation of the Piwi proteins in a slicer-dependent piRNA amplification pathway and is essential for male fertility. A third Piwi family member, Miwi (also known as Piwil1), is expressed in ...[more]

PMID: 22121019

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MIWI catalysis is required for piRNA amplification-independent LINE1 transposon silencing

Project description:This SuperSeries is composed of the following subset Series: GSE32180: MIWI catalysis is required for piRNA amplification-independent LINE1 transposon silencing [microarray] GSE32184: MIWI catalysis is required for piRNA amplification-independent LINE1 transposon silencing [deep sequencing] Refer to individual Series

2011-11-30 | E-GEOD-32183 | biostudies-arrayexpress

MIWI catalysis is required for piRNA amplification-independent LINE1 transposon silencing [microarray]

Project description:Here we show that MIWI is a small RNA-guided ribonuclease (Slicer) that requires extensive complementarity for target cleavage in vitro. Disruption of its catalytic activity in mice by a single point mutation results in male infertility and displays increased accumulation of LINE1 transposon transcripts. Round spermatids were purified from adult mouse testes of indicated Miwi genotypes. Total RNA was extracted and subjected to microarray analysis for gene expression profiling.

2011-11-30 | E-GEOD-32180 | biostudies-arrayexpress

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An Ancient Transcription Factor Initiates the Burst of piRNA Production During Early Meiosis in Mouse Testes (RNA-Seq)

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