A potentially critical Hpa II site of the X chromosome-linked PGK1 gene is unmethylated prior to the onset of meiosis of human oogenic cells

Journal Article · Sat Feb 15 00:00:00 EST 1992 · Proceedings of the National Academy of Sciences of the United States of America; (United States)

DOI:https://doi.org/10.1073/pnas.89.4.1413· OSTI ID:5686905

Singer-Sam, J; Dai, A; Riggs, A D ^[1]; Goldstein, L; Gartler, S M ^[2]

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1. Beckman Research Inst., Duarte, CA (United States)
2. Univ. of Washington, Seattle (United States)

Hpa II site H8 is in the CpG-rich 5{prime} untranslated region of the human X chromosome-linked gene for phosphoglycerate kinase 1 (PGK1). It is the only Hpa II site in the CpG island' whose methylation pattern is perfectly correlated with transcriptional silence of this gene. The authors measured DNA methylation at site H8 in fetal oogonia and oocytes and found, using a quantitative assay based on the polymerase chain reaction, that purified germ cells isolated by micromanipulation were unmethylated in 47-day to 110-day fetuses, whereas ovaries depleted of germ cells and non-ovary tissues were methylated. They conclude that site H8 is the unmethylated in germ cells prior to the onset of meiosis and reactivation of the X chromosome.

• OSTI ID: 5686905
• Journal Information: Proceedings of the National Academy of Sciences of the United States of America; (United States), Vol. 89:4; ISSN 0027-8424
• Country of Publication: United States
• Language: English

Related Subjects

59 BASIC BIOLOGICAL SCIENCES
HUMAN X CHROMOSOME
INACTIVATION
PHOSPHOTRANSFERASES
TRANSCRIPTION
GERM CELLS
MEIOSIS
METHYLATION
OOGENESIS
CELL DIVISION
CHEMICAL REACTIONS
CHROMOSOMES
ENZYMES
GAMETOGENESIS
HETEROCHROMOSOMES
HUMAN CHROMOSOMES
ORGANIC COMPOUNDS
PHOSPHORUS-GROUP TRANSFERASES
PROTEINS
TRANSFERASES
X CHROMOSOME
550400* - Genetics