Confining euchromatin/heterochromatin territory: jumonji crosses the line

Tipo de material: Texto

TextoSeries ; Genes & Development, 24(14), p.1465-1478, 2010Trabajos contenidos:

Tamaru, H

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Resumen: Heterochromatin is typically highly condensed, gene-poor, and transcriptionally silent, whereas euchromatin is less condensed, gene-rich, andmore accessible to transcription. Besides acting as a graveyard for selfish mobile DNA repeats, heterochromatin contributes to important biological functions, such as chromosome segregation during cell division. Multiple features of heterochromatin-including the presence or absence of specific histone modifications, DNAmethylation, andsmallRNAs-have beenimplicated in distinguishing heterochromatin from euchromatin in various organisms. Cells malfunction if the genome fails to restrict repressive chromatin marks within heterochromatin domains. How euchromatin and heterochromatin territories are confined remains poorly understood. Recent studies from the fission yeast Schizosaccharomyces pombe, the flowering plant Arabidopsis thaliana, and the filamentous fungusNeurospora crassa have revealed a new role for Jumonji C (JmjC)domain-containing proteins in protecting euchromatin from heterochromatin marks.

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Item type	Current library	Collection	Call number	Status	Date due	Barcode
Documentos solicitados	CICY Documento préstamo interbibliotecario	Ref1	B-11997 (Browse shelf(Opens below))	Available

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Heterochromatin is typically highly condensed, gene-poor, and transcriptionally silent, whereas euchromatin is less condensed, gene-rich, andmore accessible to transcription. Besides acting as a graveyard for selfish mobile DNA repeats, heterochromatin contributes to important biological functions, such as chromosome segregation during cell division. Multiple features of heterochromatin-including the presence or absence of specific histone modifications, DNAmethylation, andsmallRNAs-have beenimplicated in distinguishing heterochromatin from euchromatin in various organisms. Cells malfunction if the genome fails to restrict repressive chromatin marks within heterochromatin domains. How euchromatin and heterochromatin territories are confined remains poorly understood. Recent studies from the fission yeast Schizosaccharomyces pombe, the flowering plant Arabidopsis thaliana, and the filamentous fungusNeurospora crassa have revealed a new role for Jumonji C (JmjC)domain-containing proteins in protecting euchromatin from heterochromatin marks.

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