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A Novel Homozygous Nonsense Variant in the DYM Underlies Dyggve-Melchior-Clausen Syndrome in Large Consanguineous Family

(1) Background: Dyggve-Melchior-Clausen Syndrome is a skeletal dysplasia caused by a defect in the DYM gene (OMIM number 607461). Pathogenic variants in the gene have been reported to cause Dyggve-Melchior-Clausen (DMC; OMIM 223800) dysplasia and Smith-McCort (SMC; OMIM 607326) dysplasia. (2) Method...

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Autores principales: Bakar, Abu, Shams, Sulaiman, Bibi, Nousheen, Ullah, Asmat, Ahmad, Wasim, Jelani, Musharraf, Muthaffar, Osama Yousef, Abdulkareem, Angham Abdulrhman, Abujamel, Turki S., Haque, Absarul, Naseer, Muhammad Imran, Khan, Bushra
Formato: Online Artículo Texto
Lenguaje:English
Publicado: MDPI 2023
Materias:
Acceso en línea:https://www.ncbi.nlm.nih.gov/pmc/articles/PMC9956627/
https://www.ncbi.nlm.nih.gov/pubmed/36833437
http://dx.doi.org/10.3390/genes14020510
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author Bakar, Abu
Shams, Sulaiman
Bibi, Nousheen
Ullah, Asmat
Ahmad, Wasim
Jelani, Musharraf
Muthaffar, Osama Yousef
Abdulkareem, Angham Abdulrhman
Abujamel, Turki S.
Haque, Absarul
Naseer, Muhammad Imran
Khan, Bushra
author_facet Bakar, Abu
Shams, Sulaiman
Bibi, Nousheen
Ullah, Asmat
Ahmad, Wasim
Jelani, Musharraf
Muthaffar, Osama Yousef
Abdulkareem, Angham Abdulrhman
Abujamel, Turki S.
Haque, Absarul
Naseer, Muhammad Imran
Khan, Bushra
author_sort Bakar, Abu
collection PubMed
description (1) Background: Dyggve-Melchior-Clausen Syndrome is a skeletal dysplasia caused by a defect in the DYM gene (OMIM number 607461). Pathogenic variants in the gene have been reported to cause Dyggve-Melchior-Clausen (DMC; OMIM 223800) dysplasia and Smith-McCort (SMC; OMIM 607326) dysplasia. (2) Methods: In the present study, large consanguineous families with five affected individuals with osteochondrodysplasia phenotypes were recruited. The family members were analyzed by polymerase chain reaction for homozygosity mapping using highly polymorphic microsatellite markers. Subsequent to linkage analysis, the coding exons and exon intron border of the DYM gene were amplified. The amplified products were then sent for Sanger sequencing. The structural effect of the pathogenic variant was analyzed by different bioinformatics tools. (3) Results: Homozygosity mapping revealed a 9 Mb homozygous region on chromosome 18q21.1 harboring DYM shared by all available affected individuals. Sanger sequencing of the coding exons and exon intron borders of the DYM gene revealed a novel homozygous nonsense variant [DYM (NM_017653.6):c.1205T>A, p.(Leu402Ter)] in affected individuals. All the available unaffected individuals were either heterozygous or wild type for the identified variant. The identified mutation results in loss of protein stability and weekend interactions with other proteins making them pathogenic (4) Conclusions: This is the second nonsense mutation reported in a Pakistani population causing DMC. The study presented would be helpful in prenatal screening, genetic counseling, and carrier testing of other members in the Pakistani community.
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spelling pubmed-99566272023-02-25 A Novel Homozygous Nonsense Variant in the DYM Underlies Dyggve-Melchior-Clausen Syndrome in Large Consanguineous Family Bakar, Abu Shams, Sulaiman Bibi, Nousheen Ullah, Asmat Ahmad, Wasim Jelani, Musharraf Muthaffar, Osama Yousef Abdulkareem, Angham Abdulrhman Abujamel, Turki S. Haque, Absarul Naseer, Muhammad Imran Khan, Bushra Genes (Basel) Article (1) Background: Dyggve-Melchior-Clausen Syndrome is a skeletal dysplasia caused by a defect in the DYM gene (OMIM number 607461). Pathogenic variants in the gene have been reported to cause Dyggve-Melchior-Clausen (DMC; OMIM 223800) dysplasia and Smith-McCort (SMC; OMIM 607326) dysplasia. (2) Methods: In the present study, large consanguineous families with five affected individuals with osteochondrodysplasia phenotypes were recruited. The family members were analyzed by polymerase chain reaction for homozygosity mapping using highly polymorphic microsatellite markers. Subsequent to linkage analysis, the coding exons and exon intron border of the DYM gene were amplified. The amplified products were then sent for Sanger sequencing. The structural effect of the pathogenic variant was analyzed by different bioinformatics tools. (3) Results: Homozygosity mapping revealed a 9 Mb homozygous region on chromosome 18q21.1 harboring DYM shared by all available affected individuals. Sanger sequencing of the coding exons and exon intron borders of the DYM gene revealed a novel homozygous nonsense variant [DYM (NM_017653.6):c.1205T>A, p.(Leu402Ter)] in affected individuals. All the available unaffected individuals were either heterozygous or wild type for the identified variant. The identified mutation results in loss of protein stability and weekend interactions with other proteins making them pathogenic (4) Conclusions: This is the second nonsense mutation reported in a Pakistani population causing DMC. The study presented would be helpful in prenatal screening, genetic counseling, and carrier testing of other members in the Pakistani community. MDPI 2023-02-17 /pmc/articles/PMC9956627/ /pubmed/36833437 http://dx.doi.org/10.3390/genes14020510 Text en © 2023 by the authors. https://creativecommons.org/licenses/by/4.0/Licensee MDPI, Basel, Switzerland. This article is an open access article distributed under the terms and conditions of the Creative Commons Attribution (CC BY) license (https://creativecommons.org/licenses/by/4.0/).
spellingShingle Article
Bakar, Abu
Shams, Sulaiman
Bibi, Nousheen
Ullah, Asmat
Ahmad, Wasim
Jelani, Musharraf
Muthaffar, Osama Yousef
Abdulkareem, Angham Abdulrhman
Abujamel, Turki S.
Haque, Absarul
Naseer, Muhammad Imran
Khan, Bushra
A Novel Homozygous Nonsense Variant in the DYM Underlies Dyggve-Melchior-Clausen Syndrome in Large Consanguineous Family
title A Novel Homozygous Nonsense Variant in the DYM Underlies Dyggve-Melchior-Clausen Syndrome in Large Consanguineous Family
title_full A Novel Homozygous Nonsense Variant in the DYM Underlies Dyggve-Melchior-Clausen Syndrome in Large Consanguineous Family
title_fullStr A Novel Homozygous Nonsense Variant in the DYM Underlies Dyggve-Melchior-Clausen Syndrome in Large Consanguineous Family
title_full_unstemmed A Novel Homozygous Nonsense Variant in the DYM Underlies Dyggve-Melchior-Clausen Syndrome in Large Consanguineous Family
title_short A Novel Homozygous Nonsense Variant in the DYM Underlies Dyggve-Melchior-Clausen Syndrome in Large Consanguineous Family
title_sort novel homozygous nonsense variant in the dym underlies dyggve-melchior-clausen syndrome in large consanguineous family
topic Article
url https://www.ncbi.nlm.nih.gov/pmc/articles/PMC9956627/
https://www.ncbi.nlm.nih.gov/pubmed/36833437
http://dx.doi.org/10.3390/genes14020510
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