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Small RNA expression from the human macrosatellite DXZ4.

ABSTRACT: Small noncoding RNAs play several roles in regulating gene expression. In the nucleus, small RNA-Argonaute complexes recruit epigenetic modifying activities to genomic sites. This pathway has been described in mammals primarily for the germline; however, its role in somatic cells is less characterized. Here, we describe in human somatic cells a potential link between the expression of small RNAs from the macrosatellite DXZ4 and Argonaute-dependent DNA methylation of this locus. DXZ4 was found to express a wide range of small RNAs potentially representing several classes of small RNAs. A subpopulation of these RNAs is bound by Argonaute. Moreover, we show AGO association with DXZ4 and that the Argonaute proteins AGO-1 and PIWIL4 may play a role in DNA methylation of DXZ4. We hypothesize that the RNAs are involved in Argonaute-dependent methylation of DXZ4 DNA.

SUBMITTER: Pohlers M

PROVIDER: S-EPMC4199704 | biostudies-literature | 2014 Aug

REPOSITORIES: biostudies-literature

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Small RNA expression from the human macrosatellite DXZ4.

Pohlers Michael M Calabrese J Mauro JM Magnuson Terry T

G3 (Bethesda, Md.) 20140821 10

Small noncoding RNAs play several roles in regulating gene expression. In the nucleus, small RNA-Argonaute complexes recruit epigenetic modifying activities to genomic sites. This pathway has been described in mammals primarily for the germline; however, its role in somatic cells is less characterized. Here, we describe in human somatic cells a potential link between the expression of small RNAs from the macrosatellite DXZ4 and Argonaute-dependent DNA methylation of this locus. DXZ4 was found to ...[more]

PMID: 25147189

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