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Genotype-Phenotype Correlations Emerging from the Identification of Missense Mutations in MBTPS2

Bornholdt, Dorothea (author)
Atkinson, T. Prescott (author)
Bouadjar, Bakar (author)
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Catteau, Benoit (author)
Cox, Helen (author)
De Silva, Deepthi (author)
Fischer, Judith (author)
Gunasekera, Chalukya N. (author)
Hadj-Rabia, Smail (author)
Happle, Rudolf (author)
Holder-Espinasse, Muriel (author)
Kaminski, Elke (author)
Koenig, Arne (author)
Megarbane, Andre (author)
Megarbane, Hala (author)
Neidel, Ulrike (author)
Oeffner, Frank (author)
Oji, Vinzenz (author)
Theos, Amy (author)
Traupe, Heiko (author)
Vahlquist, Anders (author)
Uppsala universitet,Dermatologi och venereologi
van Bon, Bregje W. (author)
Virtanen, Marie (author)
Uppsala universitet,Dermatologi och venereologi
Grzeschik, Karl-Heinz (author)
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 (creator_code:org_t)
2013-03-08
2013
English.
In: Human Mutation. - : Hindawi Limited. - 1059-7794 .- 1098-1004. ; 34:4, s. 587-594
  • Journal article (peer-reviewed)
Abstract Subject headings
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  • Missense mutations affecting membrane-bound transcription factor protease site 2 (MBTPS2) have been associated with Ichthyosis Follicularis with Atrichia and Photophobia (IFAP) syndrome with or without BRESHECK syndrome, with keratosis follicularis spinulosa decalvans, and Olmsted syndrome. This metalloprotease activates, by intramembranous trimming in conjunction with the protease MBTPS1, regulatory factors involved in sterol control of transcription and in cellular stress response. In this study, 11 different MBTPS2 missense mutations detected in patients from 13 unrelated families were correlated with the clinical phenotype, with their effect on cellular growth in media without lipids, and their potential role for sterol control of transcription. Seven variants were novel [c.774C>G (p.I258M); c.758G>C (p.G253A); c.686T>C (p.F229S); c.1427T>C (p.L476S); c.1430A>T (p.D477V); c.1499G>A (p.G500D); c.1538T>C (p.L513P)], four had previously been reported in unrelated sibships [c.261G>A (p.M87I); c.1286G>A (p.R429H); c.1424T>C (p.F475S); c.1523A>G (p.N508S)]. In the enzyme, the mutations cluster in transmembrane domains. Amino-acid exchanges near the active site are more detrimental to functionality of the enzyme and, clinically, associated with more severe phenotypes. In male patients, a genotypephenotype correlation begins to emerge, linking the site of the mutation in MBTPS2 with the clinical outcome described as IFAP syndrome with or without BRESHECK syndrome, keratosis follicularis spinulosa decalvans, X-linked, Olmsted syndrome, or possibly further X-linked traits with an oculocutaneous component.

Keyword

MBTPS2
S2P
IFAP syndrome
KFSDX
genotypephenotype

Publication and Content Type

ref (subject category)
art (subject category)

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