Myhre syndrome (MYHRS, OMIM 139210) is an autosomal dominant disorder characterized by developmental and growth delay, athletic muscular built, variable cognitive deficits, skeletal anomalies, stiffness of joints, distinctive facial gestalt and deafness. Recently, SMAD4 (OMIM 600993) was identified by exome sequencing as the disease gene mutated in MYHRS. Previously only three missense mutations affecting Ile500 (p.Ile500Thr, p.Ile500Val, and p.Ile500Met) have been described in 22 unrelated subjects with MYHRS or a clinically related phenotype. Here we report on a 15-year-old boy with typical MYHRS and a novel heterozygous SMAD4 missense mutation affecting residue Arg496. This finding provides further information about the distinctive SMAD4 mutation spectrum in MYHRS. In silico structural analyses exploring the impact of the Arg-to-Cys change at codon 496 suggested that conformational changes promoted by replacement of Arg496 impact the stability of the SMAD heterotrimer and/or proper SMAD4 ubiquitination. © 2014 Wiley Periodicals, Inc.

Novel SMAD4 mutation causing Myhre syndrome / Caputo, Viviana; Gianfranco, Bocchinfuso; Marco, Castori; Traversa, Alice; Pizzuti, Antonio; Lorenzo, Stella; Grammatico, Paola; Marco, Tartaglia. - In: AMERICAN JOURNAL OF MEDICAL GENETICS. PART A. - ISSN 1552-4833. - STAMPA. - 164:7(2014), pp. 1835-1840. [10.1002/ajmg.a.36544]

Novel SMAD4 mutation causing Myhre syndrome

CAPUTO, VIVIANA;TRAVERSA, ALICE;PIZZUTI, Antonio;GRAMMATICO, Paola;
2014

Abstract

Myhre syndrome (MYHRS, OMIM 139210) is an autosomal dominant disorder characterized by developmental and growth delay, athletic muscular built, variable cognitive deficits, skeletal anomalies, stiffness of joints, distinctive facial gestalt and deafness. Recently, SMAD4 (OMIM 600993) was identified by exome sequencing as the disease gene mutated in MYHRS. Previously only three missense mutations affecting Ile500 (p.Ile500Thr, p.Ile500Val, and p.Ile500Met) have been described in 22 unrelated subjects with MYHRS or a clinically related phenotype. Here we report on a 15-year-old boy with typical MYHRS and a novel heterozygous SMAD4 missense mutation affecting residue Arg496. This finding provides further information about the distinctive SMAD4 mutation spectrum in MYHRS. In silico structural analyses exploring the impact of the Arg-to-Cys change at codon 496 suggested that conformational changes promoted by replacement of Arg496 impact the stability of the SMAD heterotrimer and/or proper SMAD4 ubiquitination. © 2014 Wiley Periodicals, Inc.
2014
myhre syndrome; tgf-β pathway; mutation analysis; structural analyses; smad4
01 Pubblicazione su rivista::01a Articolo in rivista
Novel SMAD4 mutation causing Myhre syndrome / Caputo, Viviana; Gianfranco, Bocchinfuso; Marco, Castori; Traversa, Alice; Pizzuti, Antonio; Lorenzo, Stella; Grammatico, Paola; Marco, Tartaglia. - In: AMERICAN JOURNAL OF MEDICAL GENETICS. PART A. - ISSN 1552-4833. - STAMPA. - 164:7(2014), pp. 1835-1840. [10.1002/ajmg.a.36544]
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Utilizza questo identificativo per citare o creare un link a questo documento: https://hdl.handle.net/11573/556156
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