Castañeda et al. 2014 (PRJNA219480)

Title	MAEL-dependent selective processing of pachytene piRNA precursors and translation of spermiogenic mRNAs
Organism
Number of Samples	4
Release Date	2013/09/18 00:00
Sequencing Types
Protocol Details

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Title
Authors	Castañeda J,Genzor P,van der Heijden GW,Sarkeshik A,Yates JR 3rd,Ingolia NT,Bortvin A
Journal	The EMBO journal
Publication Date	2014 Sep 17
Abstract	Pachytene piRNAs are a class of Piwi-interacting small RNAs abundant in spermatids of the adult mouse testis. They are processed from piRNA primary transcripts by a poorly understood mechanism and, unlike fetal transposon-derived piRNAs, lack complementary targets in the spermatid transcriptome. We report that immunopurified complexes of a conserved piRNA pathway protein Maelstrom (MAEL) are enriched in MIWI (Piwi partner of pachytene piRNAs), Tudor-domain proteins and processing intermediates of pachytene piRNA primary transcripts. We provide evidence of functional significance of these complexes in Mael129 knockout mice that exhibit spermiogenic arrest with acrosome and flagellum malformation. Mael129-null mutant testes possess low levels of piRNAs derived from MAEL-associated piRNA precursors and exhibit reduced translation of numerous spermiogenic mRNAs including those encoding acrosome and flagellum proteins. These translation defects in haploid round spermatids are likely indirect, as neither MAEL nor piRNA precursors associate with polyribosomes, and they may arise from an imbalance between pachytene piRNAs and MIWI. © 2014 The Authors.
PMC	PMC4195769
PMID	25063675
DOI

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