A chloroplast-resident DNA methyltransferase is responsible for hypermethylation of chloroplast genes in Chlamydomonas maternal gametes.

@article{Nishiyama2002ACD,
  title={A chloroplast-resident DNA methyltransferase is responsible for hypermethylation of chloroplast genes in Chlamydomonas maternal gametes.},
  author={Rie Nishiyama and Mikako Ito and Yube Yamaguchi and Nozomu Koizumi and Hiroshi Sano},
  journal={Proceedings of the National Academy of Sciences of the United States of America},
  year={2002},
  volume={99 9},
  pages={5925-30}
}
Chloroplast DNA of the green alga Chlamydomonas reinhardtii is maternally inherited. Methylation mapping directly revealed that, before mating, chloroplast DNA of maternal (mating type plus; mt(+)) gametes is heavily methylated whereas that of paternal (mating type minus; mt(-)) gametes is not. Indirect immunofluorescence analyses with anti-5-methylcytosine mAbs visually showed methylation to occur exclusively in chloroplast DNA of mt(+) gametes, and not in mt(-) gametes or nuclear DNA of… CONTINUE READING

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