Recessive mutations in AP1B1 cause ichthyosis, deafness, and photophobia
A new study recently published in the American Journal of Human Genetics identified unrelated individuals with ichthyosis, failure to thrive, thrombocytopenia, photophobia, and progressive hearing loss. Each have bi-allelic mutations in AP1B1, the gene encoding the β subunit of heterotetrameric adaptor protein 1 (AP-1) complexes, which mediate endomembrane polarization, sorting, and transport. Transduction of affected cells with wild-type AP1B1 rescues the vesicular phenotype, conclusively establishing that loss of AP1B1 function causes this disorder.
- Am J Hum Genet. 2019 Nov 7;105(5):1023-1029