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Biallelic variants in KIF14 cause intellectual disability with microcephaly

2018; Springer Nature; Volume: 26; Issue: 3 Linguagem: Inglês

10.1038/s41431-017-0088-9

1476-5438

Periklis Makrythanasis, Reza Maroofian, Asbjørg Stray‐Pedersen, Damir Musaev, Maha S. Zaki, Iman G. Mahmoud, Laila Selim, Amera Elbadawy, Shalini N. Jhangiani, Zeynep H. Coban Akdemir, Tomasz Gambin, Hanne Sørmo Sorte, Arvid Heiberg, Jennifer McEvoy‐Venneri, Kiely N. James, Valentina Stanley, Denice Belandres, Michel Guipponi, Federico Santoni, Najmeh Ahangari, Fatemeh Tara, Mohammad Doosti, Justyna Iwaszkiewicz, Vincent Zoete, Paul Hoff Backe, Hanan Hamamy, Joseph G. Gleeson, James R. Lupski, Ehsan Ghayoor Karimiani, Stylianos E. Antonarakis,

Genomics and Rare Diseases

Kinesin proteins are critical for various cellular functions such as intracellular transport and cell division, and many members of the family have been linked to monogenic disorders and cancer. We report eight individuals with intellectual disability and microcephaly from four unrelated families with parental consanguinity. In the affected individuals of each family, homozygosity for likely pathogenic variants in KIF14 were detected; two loss-of-function (p.Asn83Ilefs*3 and p.Ser1478fs), and two missense substitutions (p.Ser841Phe and p.Gly459Arg). KIF14 is a mitotic motor protein that is required for spindle localization of the mitotic citron rho-interacting kinase, CIT, also mutated in microcephaly. Our results demonstrate the involvement of KIF14 in development and reveal a wide phenotypic variability ranging from fetal lethality to moderate developmental delay and microcephaly.