University of Oulu

Lalor, L, Titeux, M, Palisson, F, et al. Epidermolysis bullosa simplex–generalized severe type due to keratin 5 p.Glu477Lys mutation: Genotype‐phenotype correlation and in silico modeling analysis. Pediatr Dermatol. 2019; 36: 132– 138. https://doi.org/10.1111/pde.13722

Epidermolysis bullosa simplex-generalized severe type due to keratin 5 p.Glu477Lys mutation : genotype-phenotype correlation and in silico modeling analysis

Saved in:
Author: Lalor, Leah1; Titeux, Matthias2,3; Palisson, Francis4,5;
Organizations: 1Division of Pediatric Dermatology, MCW Department of Dermatology, Milwaukee, Wisconsin
2Laboratory of Genetic Skin Diseases, Inserm UMR1163, Imagine Institute, Paris, France
3University Paris Descartes - Sorbonne Paris Cite, Paris, France
4Fundacion DEBRA Chile, Santiago, Chile
5Facultad de Medicina, Clinica Alemana Universidad del Desarrollo, Santiago, Chile
6Centro de Genetica y Genomica, Facultad de Medicina, Clinica Alemana Universidad del Desarrollo, Santiago, Chile
7Department of Dermatology, Pedego Research Unit, Oulu Center for Cell-Matrix Research, MRC Oulu, University of Oulu and Oulu University Hospital, Oulu, Finland
8Department of Dermatology, Medical Center - University of Freiburg, Freiburg, Germany
9Pediatric Dermatology, Fondazione IRCC Ca'Granda - Ospedale Maggiore Policlinico di Milano, Milan, Italy
10Department of Dermatology and Pediatrics, Indiana University, Indianapolis, Indiana
11Epidermolysis Bullosa Center, Cincinnati Children's Hospital Medical Center, Cincinnati, Ohio
Format: article
Version: accepted version
Access: embargoed
Persistent link: http://urn.fi/urn:nbn:fi-fe2019103035825
Language: English
Published: John Wiley & Sons, 2019
Publish Date: 2019-12-04
Description:

Abstract

Background/Objectives: Epidermolysis bullosa is a group of diseases caused by mutations in skin structural proteins. Availability of genetic sequencing makes identification of causative mutations easier, and genotype‐phenotype description and correlation are important. We describe six patients with a keratin 5 mutation resulting in a glutamic acid to lysine substitution at position 477 (p.Glu477Lys) who have a distinctive, severe and sometimes fatal phenotype. We also perform in silico modeling to show protein structural changes resulting in instability.

Methods: In this case series, we collected clinical data from six patients with this mutation identified from their national or local epidermolysis bullosa databases. We performed in silico modeling of the keratin 5‐keratin 14 coil 2B complex using CCBuilder and rendered with Pymol (Schrodinger, LLC, New York, NY).

Results: Features include aplasia cutis congenita, generalized blistering, palmoplantar keratoderma, onychodystrophy, airway and developmental abnormalities, and a distinctive reticulated skin pattern. Our in silico model of the keratin 5 p.Glu477Lys mutation predicts conformational change and modification of the surface charge of the keratin heterodimer, severely impairing filament stability.

Conclusions: Early recognition of the features of this genotype will improve care. In silico analysis of mutated keratin structures provides useful insights into structural instability.

see all

Series: Pediatric dermatology
ISSN: 0736-8046
ISSN-E: 1525-1470
ISSN-L: 0736-8046
Volume: 36
Issue: 1
Pages: 132 - 138
DOI: 10.1111/pde.13722
OADOI: https://oadoi.org/10.1111/pde.13722
Type of Publication: A1 Journal article – refereed
Field of Science: 3121 General medicine, internal medicine and other clinical medicine
Subjects:
Funding: This work was partially supported by a grant from FONDECYT (11140440, Fondo Nacional de Desarrollo Cientifico y Tecnologico) to FP, IF, and MJY.
Copyright information: © 2018 Wiley Periodicals, Inc. This is the peer reviewed version of the following article: Lalor, L, Titeux, M, Palisson, F, et al. Epidermolysis bullosa simplex–generalized severe type due to keratin 5 p.Glu477Lys mutation: Genotype‐phenotype correlation and in silico modeling analysis. Pediatr Dermatol. 2019; 36: 132– 138. https://doi.org/10.1111/pde.13722, which has been published in final form at https://doi.org/10.1111/pde.13722. This article may be used for non-commercial purposes in accordance with Wiley Terms and Conditions for Self-Archiving.