TY - JOUR
T1 - Pathogenic variants in SLF2 and SMC5 cause segmented chromosomes and mosaic variegated hyperploidy
AU - Grange, Laura J.
AU - Reynolds, John J.
AU - Ullah, Farid
AU - Isidor, Bertrand
AU - Shearer, Robert F.
AU - Latypova, Xenia
AU - Baxley, Ryan M.
AU - Oliver, Antony W.
AU - Ganesh, Anil
AU - Cooke, Sophie L.
AU - Jhujh, Satpal S.
AU - McNee, Gavin S.
AU - Hollingworth, Robert
AU - Higgs, Martin R.
AU - Natsume, Toyoaki
AU - Khan, Tahir
AU - Martos-Moreno, Gabriel
AU - Chupp, Sharon
AU - Mathew, Christopher G.
AU - Parry, David
AU - Simpson, Michael A.
AU - Nahavandi, Nahid
AU - Yüksel, Zafer
AU - Drasdo, Mojgan
AU - Kron, Anja
AU - Vogt, Petra
AU - Jonasson, Annemarie
AU - Seth, Saad Ahmed
AU - Gonzaga-Jauregui, Claudia
AU - Brigatti, Karlla W.
AU - Stegmann, Alexander P.A.
AU - Kanemaki, Masato
AU - Josifova, Dragana
AU - Uchiyama, Yuri
AU - Oh, Yukiko
AU - Morimoto, Akira
AU - Osaka, Hitoshi
AU - Ammous, Zineb
AU - Argente, Jesús
AU - Matsumoto, Naomichi
AU - Stumpel, Constance T.R.M.
AU - Taylor, Alexander M.R.
AU - Jackson, Andrew P.
AU - Bielinsky, Anja Katrin
AU - Mailand, Niels
AU - Le Caignec, Cedric
AU - Davis, Erica E.
AU - Stewart, Grant S.
N1 - Publisher Copyright:
© 2022, The Author(s).
PY - 2022
Y1 - 2022
N2 - 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.
AB - 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.
U2 - 10.1038/s41467-022-34349-8
DO - 10.1038/s41467-022-34349-8
M3 - Journal article
C2 - 36333305
AN - SCOPUS:85141158594
VL - 13
JO - Nature Communications
JF - Nature Communications
SN - 2041-1723
M1 - 6664
ER -