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Homozygous MED25 mutation implicated in eye-intellectual disability syndrome

Abstract : Genetic syndromes involving both brain and eye abnormalities are numerous and include syndromes such as Warburg micro syndrome, Kaufman oculocerebrofacial syndrome, Cerebro-oculo-facio-skeletal syndrome, Kahrizi syndrome and others. Using exome sequencing, we have been able to identify homozygous mutation p.(Tyr39Cys) in MED25 as the cause of a syndrome characterized by eye, brain, cardiac and palatal abnormalities as well as growth retardation, microcephaly and severe intellectual disability in seven patients from four unrelated families, all originating from the same village. The protein encoded by MED25 belongs to Mediator complex or MED complex, which is an evolutionary conserved multi-subunit RNA polymerase II transcriptional regulator complex. The MED25 point mutation is located in the von Willebrand factor type A (MED25 VWA) domain which is responsible for MED25 recruitment into the Mediator complex; co-immunoprecipitation experiment demonstrated that this mutation dramatically impairs MED25 interaction with the Mediator complex in mammalian cells.
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https://hal.univ-lille.fr/hal-03182060
Contributeur : Lilloa Université de Lille <>
Soumis le : vendredi 26 mars 2021 - 10:14:58
Dernière modification le : samedi 27 mars 2021 - 03:31:59

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Lina Basel-Vanagaite, Pola Smirin-Yosef, Jenna Lee Essakow, Shay Tzur, Irina Lagovsky, et al.. Homozygous MED25 mutation implicated in eye-intellectual disability syndrome. Hum Genet, 2015, Human Genetics, 134 (6), pp.577-587. ⟨10.1007/s00439-015-1541-x⟩. ⟨hal-03182060⟩

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