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Article Addendum
Centromere structures highlighted by the 100%-complete Cyanidioschyzon merolae Genome
Shinichiro Maruyama, Motomichi Matsuzaki, Haruko Kuroiwa, Shin-ya Miyagishima, Kan Tanaka, Tsuneyoshi Kuroiwa and Hisayoshi Nozaki
volume 3 | issue 2
february 2008Pages: 140 - 141
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Centromere dynamics are largely unknown in lower plants (algae). We have recently identified the centromere-specific histone H3 variant (CENH3) and clarified the dynamic centromere rearrangement at mitosis in the primitive red alga Cyanidioschyzon merolae. We also showed that the CENH3-containing nucleosomes constituted the kinetochore closely interacting with the nuclear envelope. CENH3 visualization during the whole cell cycle suggests that C. merolae centromeres are monocentric and confined to specific loci. We completed 100% no-gap telomere-to-telomere sequencing of the C. merolae genome. Interestingly, a single A+T-rich region has been identified on each fully sequenced chromosome. No centromere-like A+T rich repetitive sequence have been found within these regions, implying that the C. merolae centromeres may be ‘point’ centromeres, or be comprised of non-repetitive heterogeneous DNA sequences.
Authors
Shinichiro Maruyama
The University of Tokyo, Tokyo, Japan
Motomichi Matsuzaki
The University of Tokyo, Tokyo, Japan
Haruko Kuroiwa
Rikkyo (St. Paul's) University, Tokyo, Japan
Shin-ya Miyagishima
Miyagishima Initiative Research Unit, Frontier Research System, RIKEN, Saitama, Japan
Kan Tanaka
The University of Tokyo, Tokyo, Japan
Tsuneyoshi Kuroiwa
Rikkyo (St. Paul's) University, Tokyo, Japan
Hisayoshi Nozaki
The University of Tokyo, Tokyo, Japan