%0 Journal Article %T An atlas of chromatoid body components. %+ Institut de recherche en santé, environnement et travail (Irset) %A Meikar, Oliver %A Vagin, Vasily V %A Chalmel, Frédéric %A Sõstar, Karin %A Lardenois, Aurélie %A Hammell, Molly %A Jin, Ying %A da Ros, Matteo %A Wasik, Kaja A %A Toppari, Jorma %A Hannon, Gregory J %A Kotaja, Noora %Z the Academy of Finland; the Emil Aaltonen Foundation; the Sigrid Juselius Foundation; the Novo Nordisk Foundation (to N.K.); the Turku Doctoral Programme of Biomedical Sciences (to M.D.R.); the National Institutes of Health (5R01GM062534 to G.J.H.);(to G.J.H.). G.J.H., an investigator at the Howard Hughes Medical Institute ; The Tartu University Proteomics Unit for the MS analysis, the Turku Centre for Biotechnology, the whole staff of the Department of Physiology %< avec comité de lecture %@ 1355-8382 %J RNA %I Cold Spring Harbor Laboratory Press %V 20 %N 4 %P 483-95 %8 2014-04 %D 2014 %R 10.1261/rna.043729.113 %M 24554440 %K chromatoid body %K male germ cells %K piRNA %K post-transcriptional %K ribonucleoprotein granule %Z Life Sciences [q-bio]/Cellular BiologyJournal articles %X The genome of male germ cells is actively transcribed during spermatogenesis to produce phase-specific protein-coding mRNAs and a considerable amount of different noncoding RNAs. Ribonucleoprotein (RNP) granule-mediated RNA regulation provides a powerful means to secure the quality and correct expression of the requisite transcripts. Haploid spermatids are characterized by a unique, unusually large cytoplasmic granule, the chromatoid body (CB), which emerges during the switch between the meiotic and post-meiotic phases of spermatogenesis. To better understand the role of the CB in male germ cell differentiation, we isolated CBs from mouse testes and revealed its full RNA and protein composition. We showed that the CB is mainly composed of RNA-binding proteins and other proteins involved RNA regulation. The CB was loaded with RNA, including pachytene piRNAs, a diverse set of mRNAs, and a number of uncharacterized long noncoding transcripts. The CB was demonstrated to accumulate nascent RNA during all the steps of round spermatid differentiation. Our results revealed the CB as a large germ cell-specific RNP platform that is involved in the control of the highly complex transcriptome of haploid male germ cells. %G English %L hal-00985894 %U https://univ-rennes.hal.science/hal-00985894 %~ UNIV-RENNES1 %~ UNIV-ANGERS %~ IFR140 %~ IRSET %~ STATS-UR1 %~ IRSET-SMS %~ IRSET-CCII %~ IRSET-TREC %~ IRSET-HIAEC %~ IRSET-SMLF %~ IRSET-ERD %~ IRSET-VCER %~ IRSET-NEED %~ IRSET-TNGC %~ UR1-UFR-SVE %~ UR1-HAL %~ UR1-SDV %~ IRSET-8 %~ TEST-UNIV-RENNES %~ TEST-UR-CSS %~ UNIV-RENNES %~ IRSET-8-EX-VCER %~ UR1-BIO-SA