Response to Comment on "Cell Type Regulates Selective Segregation of Mouse Chromosome 7 DNA Strands in Mitosis"

Science ◽  
2006 ◽  
Vol 313 (5790) ◽  
pp. 1045c-1045c ◽  
Author(s):  
A. J. S. Klar
Keyword(s):  
Mouse Chromosome ◽  
Chromosome 7 ◽  
Cell Type ◽  
Dna Strands

Mouse Chromosome 7

1999 ◽  
Vol 10 (10) ◽  
pp. 947-947 ◽  
Author(s):  
Robert W. Williams ◽  
Joe M. Angel ◽  
Bernadette C. Holdener ◽  
Rebecca Oakey ◽  
Kent W. Hunter
Keyword(s):  
Mouse Chromosome ◽  
Chromosome 7

scholarly journals The H19 Differentially Methylated Region Marks the Parental Origin of a Heterologous Locus without Gametic DNA Methylation

2004 ◽  
Vol 24 (9) ◽  
pp. 3588-3595 ◽  
Author(s):  
Kye-Yoon Park ◽  
Elizabeth A. Sellars ◽  
Alexander Grinberg ◽  
Sing-Ping Huang ◽  
Karl Pfeifer
Keyword(s):  
Dna Methylation ◽  
Mouse Chromosome ◽  
Germ Line ◽  
Transcriptional Silencing ◽  
Chromosome 7 ◽  
Differentially Methylated Region ◽  
Parental Origin ◽  
Imprinted Genes ◽  
Chromosome 5 ◽  
The Third

ABSTRACT Igf2 and H19 are coordinately regulated imprinted genes physically linked on the distal end of mouse chromosome 7. Genetic analyses demonstrate that the differentially methylated region (DMR) upstream of the H19 gene is necessary for three distinct functions: transcriptional insulation of the maternal Igf2 allele, transcriptional silencing of paternal H19 allele, and marking of the parental origin of the two chromosomes. To test the sufficiency of the DMR for the third function, we inserted DMR at two heterologous positions in the genome, downstream of H19 and at the alpha-fetoprotein locus on chromosome 5. Our results demonstrate that the DMR alone is sufficient to act as a mark of parental origin. Moreover, this activity is not dependent on germ line differences in DMR methylation. Thus, the DMR can mark its parental origin by a mechanism independent of its own DNA methylation.

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