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Small RNA profiling and characterization of piRNA clusters in the adult testes of the common marmoset, a model primate
- Source :
- RNA. 20:1223-1237
- Publication Year :
- 2014
- Publisher :
- Cold Spring Harbor Laboratory, 2014.
-
Abstract
- Small RNAs mediate gene silencing by binding Argonaute/Piwi proteins to regulate target RNAs. Here, we describe small RNA profiling of the adult testes of Callithrix jacchus, the common marmoset. The most abundant class of small RNAs in the adult testis was piRNAs, although 353 novel miRNAs but few endo-siRNAs were also identified. MARWI, a marmoset homolog of mouse MIWI and a very abundant PIWI in adult testes, associates with piRNAs that show characteristics of mouse pachytene piRNAs. As in other mammals, most marmoset piRNAs are derived from conserved clustered regions in the genome, which are annotated as intergenic regions. However, unlike in mice, marmoset piRNA clusters are also found on the X chromosome, suggesting escape from meiotic sex chromosome inactivation by the X-linked clusters. Some of the piRNA clusters identified contain antisense-orientated pseudogenes, suggesting the possibility that pseudogene-derived piRNAs may regulate parental functional protein-coding genes. More piRNAs map to transposable element (TE) subfamilies when they have copies in piRNA clusters. In addition, the strand bias observed for piRNAs mapped to each TE subfamily correlates with the polarity of copies inserted in clusters. These findings suggest that pachytene piRNA clusters determine the abundance and strand-bias of TE-derived piRNAs, may regulate protein-coding genes via pseudogene-derived piRNAs, and may even play roles in meiosis in the adult marmoset testis.
- Subjects :
- Male
Transposable element
endocrine system
Small RNA
Pseudogene
Molecular Sequence Data
Gene Expression
Piwi-interacting RNA
Mice
RNA, Transfer
biology.animal
Testis
MiWi
Animals
RasiRNA
RNA, Small Interfering
Molecular Biology
Genetics
Genome
Base Sequence
biology
urogenital system
Gene Expression Profiling
Marmoset
Callithrix
Articles
Argonaute
Physical Chromosome Mapping
Multigene Family
Argonaute Proteins
DNA Transposable Elements
Nucleic Acid Conformation
Sequence Alignment
Pseudogenes
Protein Binding
Subjects
Details
- ISSN :
- 14699001 and 13558382
- Volume :
- 20
- Database :
- OpenAIRE
- Journal :
- RNA
- Accession number :
- edsair.doi.dedup.....bc5baa4755683ff5d6a552d5d735a286