Chromosome Research

, Volume 9, Issue 2, pp 147–165

Transcripts of the MHM region on the chicken Z chromosome accumulate as non-coding RNA in the nucleus of female cells adjacent to the DMRT1 locus

  • Mika Teranishi
  • Yukiko Shimada
  • Tetsuya Hori
  • Osamu Nakabayashi
  • Tateki Kikuchi
  • Tracy Macleod
  • Robert Pym
  • Bruce Sheldon
  • Irina Solovei
  • Herbert Macgregor
  • Shigeki Mizuno
Article

DOI: 10.1023/A:1009235120741

Cite this article as:
Teranishi, M., Shimada, Y., Hori, T. et al. Chromosome Res (2001) 9: 147. doi:10.1023/A:1009235120741

Abstract

The male hypermethylated (MHM) region, located near the middle of the short arm of the Z chromosome of chickens, consists of approximately 210 tandem repeats of a BamHI 2.2-kb sequence unit. Cytosines of the CpG dinucleotides of this region are extensively methylated on the two Z chromosomes in the male but much less methylated on the single Z chromosome in the female. The state of methylation of the MHM region is established after fertilization by about the 1-day embryonic stage. The MHM region is transcribed only in the female from the particular strand into heterogeneous, high molecular-mass, non-coding RNA, which is accumulated at the site of transcription, adjacent to the DMRT1 locus, in the nucleus. The transcriptional silence of the MHM region in the male is most likely caused by the CpG methylation, since treatment of the male embryonic fibroblasts with 5-azacytidine results in hypo-methylation and active transcription of this region. In ZZW triploid chickens, MHM regions are hypomethylated and transcribed on the two Z chromosomes, whereas MHM regions are hypermethylated and transcriptionally inactive on the three Z chromosomes in ZZZ triploid chickens, suggesting a possible role of the W chromosome on the state of the MHM region.

CpG methylation DMRT1 gene Gallus gallus domesticus MHM region nuclear non-coding RNA triploid chickens W chromosome Z chromosome 

Copyright information

© Kluwer Academic Publishers 2001

Authors and Affiliations

  • Mika Teranishi
  • Yukiko Shimada
  • Tetsuya Hori
  • Osamu Nakabayashi
  • Tateki Kikuchi
  • Tracy Macleod
  • Robert Pym
  • Bruce Sheldon
  • Irina Solovei
  • Herbert Macgregor
  • Shigeki Mizuno

There are no affiliations available