Subnuclear gene positioning through lamina association affects copper tolerance

Yuki Sakamoto, Mayuko Sato, Yoshikatsu Sato, Akihito Harada, Takamasa Suzuki, Chieko Goto, Kentaro Tamura, Kiminori Toyooka, Hiroshi Kimura, Yasuyuki Ohkawa, Ikuko Hara-Nishimura, Shingo Takagi, Sachihiro Matsunaga

    Research output: Contribution to journalArticlepeer-review

    17 Citations (Scopus)


    The nuclear lamina plays an important role in the regulation of chromatin organization and gene positioning in animals. CROWDED NUCLEI (CRWN) is a strong candidate for the plant nuclear lamina protein in Arabidopsis thaliana but its biological function was largely unknown. Here, we show that CRWNs localize at the nuclear lamina and build the meshwork structure. Fluorescence in situ hybridization and RNA-seq analyses revealed that CRWNs regulate chromatin distribution and gene expression. More than 2000 differentially expressed genes were identified in the crwn1crwn4 double mutant. Copper-associated (CA) genes that form a gene cluster on chromosome 5 were among the downregulated genes in the double mutant exhibiting low tolerance to excess copper. Our analyses showed this low tolerance to copper was associated with the suppression of CA gene expression and that CRWN1 interacts with the CA gene locus, enabling the locus to localize at the nuclear lamina under excess copper conditions.

    Original languageEnglish
    Article number5914
    JournalNature communications
    Issue number1
    Publication statusPublished - Dec 2020

    All Science Journal Classification (ASJC) codes

    • Chemistry(all)
    • Biochemistry, Genetics and Molecular Biology(all)
    • Physics and Astronomy(all)


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