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1.
Genome Biol ; 25(1): 134, 2024 05 23.
Artigo em Inglês | MEDLINE | ID: mdl-38783307

RESUMO

The marsupial specific RSX lncRNA is the functional analogue of the eutherian specific XIST, which coordinates X chromosome inactivation. We characterized the RSX interactome in a marsupial representative (the opossum Monodelphis domestica), identifying 135 proteins, of which 54 had orthologues in the XIST interactome. Both interactomes were enriched for biological pathways related to RNA processing, regulation of translation, and epigenetic transcriptional silencing. This represents a remarkable example showcasing the functional coherence of independently evolved lncRNAs in distantly related mammalian lineages.


Assuntos
RNA Longo não Codificante , Inativação do Cromossomo X , Animais , RNA Longo não Codificante/metabolismo , RNA Longo não Codificante/genética , Monodelphis/genética , Monodelphis/metabolismo
2.
Genes (Basel) ; 9(5)2018 May 01.
Artigo em Inglês | MEDLINE | ID: mdl-29723955

RESUMO

DNA methylation is a key epigenetic modification in vertebrate genomes known to be involved in the regulation of gene expression, X chromosome inactivation, genomic imprinting, chromatin structure, and control of transposable elements. DNA methylation is common to all eukaryote genomes, but we still lack a complete understanding of the variation in DNA methylation patterns on sex chromosomes and between the sexes in diverse species. To better understand sex chromosome DNA methylation patterns between different amniote vertebrates, we review literature that has analyzed the genome-wide distribution of DNA methylation in mammals and birds. In each system, we focus on DNA methylation patterns on the autosomes versus the sex chromosomes.

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