Three novel mutations in the ANK membrane protein cause craniometaphyseal 
dysplasia with variable conductive hearing loss.

Kornak, U.; Brancati, F.; Le Merrer, M.; Lichtenbelt, K.; Höhne, W.; Tinschert, S.; Garaci, F. G.; Dallapiccola, B.; Nürnberg, P.

doi:10.1002/ajmg.a.33301

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Three novel mutations in the ANK membrane protein cause craniometaphyseal dysplasia with variable conductive hearing loss.

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Kornak, U.
Research Group Development & Disease (Head: Stefan Mundlos), Max Planck Institute for Molecular Genetics, Max Planck Society;

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Tinschert, S.
Research Group Development & Disease (Head: Stefan Mundlos), Max Planck Institute for Molecular Genetics, Max Planck Society;

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Citation

Kornak, U., Brancati, F., Le Merrer, M., Lichtenbelt, K., Höhne, W., Tinschert, S., et al. (2010). Three novel mutations in the ANK membrane protein cause craniometaphyseal dysplasia with variable conductive hearing loss. American Journal of Medical Genetics Part A, 152A(4), 870-874. doi:10.1002/ajmg.a.33301.

Cite as: https://hdl.handle.net/11858/00-001M-0000-0010-7B88-6

Abstract

Craniometaphyseal dysplasia (CMD) is a rare, sclerosing skeletal disorder caused by mutations in ANKH, which encodes a putative pyrophosphate transporting membrane protein. Six distinct ANKH mutations have been described to date. We report here on three novel mutations in simplex patients with CMD. The c.1015T>C (p.Cys339Arg) mutation found in Patient A was associated with congenital facial palsy, early-onset conductive hearing loss, and a generalized undermodeling of the long bones. The c.1172T>C (p.Leu391Pro) mutation in Patient B was associated with facial palsy, progressive conductive hearing loss, and generalized undermodeling of tubular bones. A milder phenotype without cranial nerve affection was observed in Patient C, associated with a c.1001T>G (p.Leu334Arg) mutation. All affected residues lie in evolutionarily conserved sequence blocks. These additional cases and the associated mutations contribute to an improved appreciation of the variability of this rare skeletal dysplasia. (c) 2010 Wiley-Liss, Inc.