التفاصيل البيبلوغرافية
| العنوان: |
Pathogenic variants in SLF2 and SMC5 cause segmented chromosomes and mosaic variegated hyperploidy. |
| المؤلفون: |
Grange, Laura J., Reynolds, John J., Ullah, Farid, Isidor, Bertrand, Shearer, Robert F., Latypova, Xenia, Baxley, Ryan M., Oliver, Antony W., Ganesh, Anil, Cooke, Sophie L., Jhujh, Satpal S., McNee, Gavin S., Hollingworth, Robert, Higgs, Martin R., Natsume, Toyoaki, Khan, Tahir, Martos-Moreno, Gabriel Á., Chupp, Sharon, Mathew, Christopher G., Parry, David |
| المصدر: |
Nature Communications; 11/4/2022, Vol. 13 Issue 1, p1-22, 22p |
| مصطلحات موضوعية: |
MOSAICISM, DNA structure, EMBRYOLOGY, CHROMOSOMES, CELL division, DNA replication, SHORT stature, DNA repair |
| مستخلص: |
Embryonic development is dictated by tight regulation of DNA replication, cell division and differentiation. Mutations in DNA repair and replication genes disrupt this equilibrium, giving rise to neurodevelopmental disease characterized by microcephaly, short stature and chromosomal breakage. Here, we identify biallelic variants in two components of the RAD18-SLF1/2-SMC5/6 genome stability pathway, SLF2 and SMC5, in 11 patients with microcephaly, short stature, cardiac abnormalities and anemia. Patient-derived cells exhibit a unique chromosomal instability phenotype consisting of segmented and dicentric chromosomes with mosaic variegated hyperploidy. To signify the importance of these segmented chromosomes, we have named this disorder Atelís (meaning - incomplete) Syndrome. Analysis of Atelís Syndrome cells reveals elevated levels of replication stress, partly due to a reduced ability to replicate through G-quadruplex DNA structures, and also loss of sister chromatid cohesion. Together, these data strengthen the functional link between SLF2 and the SMC5/6 complex, highlighting a distinct role for this pathway in maintaining genome stability. The SMC5/6 complex is critical for genome stability. Here, the authors identify mutations in SLF2 and SMC5 as cause of Atelís Syndrome characterized by microcephaly, short stature, anemia, segmented chromosomes and mosaic variegated hyperploidy. [ABSTRACT FROM AUTHOR] |
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| قاعدة البيانات: |
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