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A novel truncating variant in ring finger protein 113A (RNF113A) confirms the association of this gene with X-linked trichothiodystrophy.

Bryce A MendelsohnDaniah T BelefordAya Abu-El-HaijaNorah S AlsalehZuhair RahbeeniPierre-Marie MartinShannon RegoAlyssa HuangGina CapodannoJoseph T C ShiehJessica Van ZiffleNeil RischFowzan Sami AlkurayaAnne M Slavotinek
Published in: American journal of medical genetics. Part A (2019)
We describe an 11-year old boy with severe global developmental delays, failure to thrive and growth retardation, refractory seizures with recurrent status epilepticus, hypogammaglobulinemia, hypergonadotropic hypogonadism, and duodenal strictures. He had facial and skin findings compatible with trichothiodystrophy, including sparse and brittle hair, thin eyebrows, and dry skin. Exome sequencing showed a hemizygous, truncating variant in RNF113A, c.903_910delGCAGACCA, predicting p.(Gln302fs*12), that was inherited from his mother. Although his clinical features overlap closely with features described in the two previously reported male first cousins with RNF113A loss of function mutations, the duodenal strictures seen in this patient have not been reported. Interestingly, the patient's mother had short stature and 100% skewed X-inactivation as seen in other obligate female carriers. A second male with developmental delays, microcephaly, seizures, ambiguous genitalia, and facial anomalies that included sparse and brittle hair, thin eyebrows and dry skin was recently reported to have c.897_898delTG, predicting p.(Cys299*) in RNF113A and we provide additional clinical details for this patient. This report further supports deleterious variants in RNF113A as a cause of a novel trichothiodystrophy syndrome.
Keyphrases
  • soft tissue
  • case report
  • dna damage response
  • copy number
  • wound healing
  • zika virus
  • intellectual disability
  • genome wide
  • autism spectrum disorder
  • dna damage
  • dna repair