Transposons and tandem repeats are not involved in the control of genomic imprinting at the MEDEA locus in Arabidopsis.
نویسندگان
چکیده
منابع مشابه
Maintenance of genomic imprinting at the Arabidopsis medea locus requires zygotic DDM1 activity.
In higher plants, seed development requires maternal gene activity in the haploid (gametophytic) as well as diploid (sporophytic) tissues of the developing ovule. The Arabidopsis thaliana gene MEDEA (MEA) encodes a SET-domain protein of the Polycomb group that regulates cell proliferation by exerting a gametophytic maternal control during seed development. Seeds derived from female gametocytes ...
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Genomic imprinting is an essential epigenetic process that controls the size of seeds in flowering plants. In Arabidopsis, DEMETER activates the maternal copy of the imprinted MEDEA Polycomb gene. In this issue of Cell, Gehring et al. (2006) demonstrate that this activation involves DNA demethylation of MEDEA by DEMETER. Remarkably, they also find that silencing of the paternal MEDEA allele is ...
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The mouse insulin-like growth factor 2 (Igf2) locus is a complex genomic region that produces multiple transcripts from alternative promoters. Expression at this locus is regulated by parental imprinting. However, despite the existence of putative imprinting control elements in the Igf2 upstream region, imprinted transcriptional repression is abolished by null mutations at the linked H19 locus....
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ورودعنوان ژورنال:
- Cold Spring Harbor symposia on quantitative biology
دوره 69 شماره
صفحات -
تاریخ انتشار 2004