The Dlk1 and Gtl2 genes are linked and reciprocally imprinted

AUTOR(ES)

Schmidt, Jennifer V.

FONTE

Cold Spring Harbor Laboratory Press

RESUMO

Genes subject to genomic imprinting exist in large chromosomal domains, probably reflecting coordinate regulation of the genes within a cluster. Such regulation has been demonstrated for the H19, Igf2, and Ins2 genes that share a bifunctional imprinting control region. We have identified the Dlk1 gene as a new imprinted gene that is paternally expressed. Furthermore, we show that Dlk1 is tightly linked to the maternally expressed Gtl2 gene. Dlk1 and Gtl2 are coexpressed and respond in a reciprocal manner to loss of DNA methylation. These genes are likely to represent a new example of coordinated imprinting of linked genes.

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