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Updated: May 13, 2026

In Vivo Functional Study of Disease-associated Rare Human Variants Using Drosophila
Published on: August 20, 2019
Mutations in ABCB6 cause dyschromatosis universalis hereditaria
Caie Zhang1, Duanzhuo Li, Jianguo Zhang
1Department of Anesthesiology, Huazhong University of Science and Technology, Wuhan, Hubei, China.
Researchers identified the ATP-binding cassette subfamily B, member 6 (ABCB6) gene as the first cause of Dyschromatosis universalis hereditaria (DUH), a rare skin pigmentation disorder. This discovery sheds light on the genetic factors influencing skin tone.
Area of Science:
- Genetics
- Dermatology
- Molecular Biology
Background:
- Dyschromatosis universalis hereditaria (DUH) is a rare genodermatosis causing irregular hyperpigmented and hypopigmented macules.
- The genetic basis of DUH has remained largely unknown, hindering diagnosis and treatment.
Observation:
- A large Chinese family with a five-generation history of DUH was studied.
- Genome-wide linkage analysis pinpointed a DUH locus on chromosome 2q33.3-q36.1.
- Exome sequencing revealed mutations in the ABCB6 gene in affected family members.
Findings:
- The ATP-binding cassette subfamily B, member 6 (ABCB6) gene was identified as the first causative gene for DUH.
- Specific mutations (p.Leu356Pro, p.Ser170Gly, p.Gly579Glu) in ABCB6 were found in DUH patients.
- ABCB6 protein localizes to endosome-like compartments and dendrite tips, with mutations causing Golgi retention.
Implications:
- This study establishes ABCB6 as a key player in skin pigmentation.
- Understanding ABCB6's role opens new avenues for diagnosing and potentially treating DUH.
- Further research into ABCB6 function may reveal broader implications for pigmentary disorders.
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