Mouse MAELSTROM: the link between meiotic silencing of unsynapsed chromatin and microRNA pathway?

Yael Costa, Robert M Speed, Philippe Gautier, Colin A Semple, Klio Maratou, James M A Turner, Howard J Cooke

Research output: Contribution to journalArticlepeer-review

Abstract

Meiotic silencing of unsynapsed chromatin (MSUC) is a key mechanism in spermatogenesis and a model system to study the dynamics of gene silencing. Here we show that MAEL, the ortholog of Drosophila's high mobility group box protein Maelstrom, is associated not only with the silenced XY body, but also with unsynapsed autosomes. Characterization of MAEL revealed that it interacts directly with the chromatin remodeler SNF5/INI1 and chromatin-associated protein SIN3B, which we also find localized to the XY body. This is the first time that a chromatin remodeler has been shown to associate with whole chromosomes. In addition, we show that MAEL is a component of the mouse meiotic nuage and its haploid cell counterpart, the chromatoid body. This is a site of accumulation of RNA and RNA processing enzymes, including proteins involved in the microRNA (miRNA) pathway. Furthermore, in the nuage, MAEL is present in a complex with germ cell specific MVH, an RNA helicase and Argonaute family members, MILI and MIWI. The presence of MAEL in these critical compartments of male germ cells and its interactions provide a link suggesting the involvement of the miRNA pathway in MSUC.
Original languageEnglish
Pages (from-to)2324-34
Number of pages11
JournalHuman Molecular Genetics
Volume15
Issue number15
DOIs
Publication statusPublished - 2006

Fingerprint

Dive into the research topics of 'Mouse MAELSTROM: the link between meiotic silencing of unsynapsed chromatin and microRNA pathway?'. Together they form a unique fingerprint.

Cite this