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Mouse MOV10L1 associates with Piwi proteins and is an essential component of the Piwi-interacting RNA (piRNA) pathway.

Piwi-interacting RNAs (piRNAs) are essential for silencing of transposable elements in the germline, but their biogenesis is poorly understood. Here we demonstrate that MOV10L1, a germ cell-specific putative RNA helicase, is associated with Piwi proteins. Genetic disruption of the MOV10L1 RNA helicase domain in mice renders both MILI and MIWI2 devoid of piRNAs. Absence of a functional piRNA pathway in Mov10l1 mutant testes causes loss of DNA methylation and subsequent derepression of retrotransposons in germ cells. The Mov10l1 mutant males are sterile owing to complete meiotic arrest. This mouse mutant expresses Piwi proteins but lacks piRNAs, suggesting that MOV10L1 is required for piRNA biogenesis and/or loading to Piwi proteins.

Pubmed ID: 20534472 RIS Download

Mesh terms: Animals | Argonaute Proteins | Base Sequence | DNA Methylation | DNA Primers | Fertility | Male | Meiosis | Mice | Mice, Knockout | Mutation | Proteins | RNA Helicases | RNA, Small Interfering | Retroelements | Ribonucleoproteins, Small Nuclear | Spermatocytes | Spermatogenesis | Spermatogonia | Testis

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Associated grants

  • Agency: NIGMS NIH HHS, Id: R01 GM076327
  • Agency: NICHD NIH HHS, Id: R01 HD069592
  • Agency: NIGMS NIH HHS, Id: R01GM076327

Mouse Genome Informatics (Data, Gene Annotation)

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