Permanent URL to this publication: http://dx.doi.org/10.5167/uzh-65573
Coelho, David; Kim, Jaeseung C; Miousse, Isabelle R; Fung, Stephen; du Moulin, Marcel; Buers, Insa; Suormala, Terttu; Burda, Patricie; Frapolli, Michele; Stucki, Martin; Nürnberg, Peter; Thiele, Holger; Robenek, Horst; Höhne, Wolfgang; Longo, Nicola; Pasquali, Marzia; Mengel, Eugen; Watkins, David; Shoubridge, Eric A; Majewski, Jacek; Rosenblatt, David S; Fowler, Brian; Rutsch, Frank; Baumgartner, Matthias R (2012). Mutations in ABCD4 cause a new inborn error of vitamin B(12) metabolism. Nature Genetics, 44(10):1152-1155.
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Inherited disorders of vitamin B(12) (cobalamin) have provided important clues to how this vitamin, which is essential for hematological and neurological function, is transported and metabolized. We describe a new disease that results in failure to release vitamin B(12) from lysosomes, which mimics the cblF defect caused by LMBRD1 mutations. Using microcell-mediated chromosome transfer and exome sequencing, we identified causal mutations in ABCD4, a gene that codes for an ABC transporter, which was previously thought to have peroxisomal localization and function. Our results show that ABCD4 colocalizes with the lysosomal proteins LAMP1 and LMBD1, the latter of which is deficient in the cblF defect. Furthermore, we show that mutations altering the putative ATPase domain of ABCD4 affect its function, suggesting that the ATPase activity of ABCD4 may be involved in intracellular processing of vitamin B(12).
|Item Type:||Journal Article, refereed, original work|
|Communities & Collections:||04 Faculty of Medicine > University Children's Hospital Zurich > Medical Clinic|
04 Faculty of Medicine > Center for Integrative Human Physiology
|DDC:||570 Life sciences; biology|
610 Medicine & health
|Deposited On:||19 Oct 2012 12:54|
|Last Modified:||15 May 2013 16:38|
|Publisher:||Nature Publishing Group|
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