Molecular organization of recombinant human-Arabidopsis chromosomes in hybrid cell lines

Liu, Yikun and Liaw, Yeng Mun and Teo, Chee How and Capal, Petr and Wada, Naoki and Fukui, Kiichi and Dolezel, Jaroslav and Ohmido, Nobuko (2021) Molecular organization of recombinant human-Arabidopsis chromosomes in hybrid cell lines. Scientific Reports, 11 (1). ISSN 2045-2322, DOI

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Although plants and animals are evolutionarily distant, the structure and function of their chromosomes are largely conserved. This allowed the establishment of a human-Arabidopsis hybrid cell line in which a neo-chromosome was formed by insertion of segments of Arabidopsis chromosomes into human chromosome 15. We used this unique system to investigate how the introgressed part of a plant genome was maintained in human genetic background. The analysis of the neo-chromosome in 60- and 300-day-old cell cultures by next-generation sequencing and molecular cytogenetics suggested its origin by fusion of DNA fragments of different sizes from Arabidopsis chromosomes 2, 3, 4, and 5, which were randomly intermingled rather than joined end-to-end. The neo-chromosome harbored Arabidopsis centromeric repeats and terminal human telomeres. Arabidopsis centromere wasn't found to be functional. Most of the introgressed Arabidopsis DNA was eliminated during the culture, and the Arabidopsis genome in 300-day-old culture showed significant variation in copy number as compared with the copy number variation in the 60-day-old culture. Amplified Arabidopsis centromere DNA and satellite repeats were localized at particular loci and some fragments were inserted into various positions of human chromosome. Neo-chromosome reorganization and behavior in somatic cell hybrids between the plant and animal kingdoms are discussed.

Item Type: Article
Funders: "Kobe University Visiting Researcher project" from Kobe University, ERDF project "Plants as a tool for sustainable global development" [Grant No: CZ.02.1.01/0.0/0.0/16_019/0000827], Mobility Plus Projec [Grant No: JSPS-18-07 & JPJSBP120203507]
Uncontrolled Keywords: Molecular organization; Human-Arabidopsis chromosomes; Hybrid cell lines
Subjects: Q Science > Q Science (General)
T Technology > T Technology (General)
Divisions: Deputy Vice Chancellor (Research & Innovation) Office > Centre for Research in Biotechnology for Agriculture
Depositing User: Ms Zaharah Ramly
Date Deposited: 21 Jun 2022 08:32
Last Modified: 21 Jun 2022 08:32

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