The C. elegans SNAPc component SNPC-4 coats piRNA domains and is globally required for piRNA abundance.
Dev Cell
; 31(2): 145-58, 2014 Oct 27.
Article
em En
| MEDLINE
| ID: mdl-25373775
ABSTRACT
The Piwi/Piwi-interacting RNA (piRNA) pathway protects the germline from the activity of foreign sequences such as transposons. Remarkably, tens of thousands of piRNAs arise from a minimal number of discrete genomic regions. The extent to which clustering of these small RNA genes contributes to their coordinated expression remains unclear. We show that C. elegans SNPC-4, the Myb-like DNA-binding subunit of the small nuclear RNA activating protein complex, binds piRNA clusters in a germline-specific manner and is required for global piRNA expression. SNPC-4 localization is mutually dependent with localization of piRNA biogenesis factor PRDE-1. SNPC-4 exhibits an atypical widely distributed binding pattern that "coats" piRNA domains. Discrete peaks within the domains occur frequently at RNA-polymerase-III-occupied transfer RNA (tRNA) genes, which have been implicated in chromatin organization. We suggest that SNPC-4 binding establishes a positive expression environment across piRNA domains, providing an explanation for the conserved clustering of individually transcribed piRNA genes.
Texto completo:
1
Coleções:
01-internacional
Base de dados:
MEDLINE
Assunto principal:
Caenorhabditis elegans
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RNA Interferente Pequeno
/
Proteínas de Ligação a DNA
Limite:
Animals
Idioma:
En
Revista:
Dev Cell
Assunto da revista:
EMBRIOLOGIA
Ano de publicação:
2014
Tipo de documento:
Article
País de afiliação:
Estados Unidos
País de publicação:
EEUU
/
ESTADOS UNIDOS
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ESTADOS UNIDOS DA AMERICA
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EUA
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UNITED STATES
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UNITED STATES OF AMERICA
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US
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USA