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Idyahia A, Redouan S, Amalou G, Charoute H, Harmak H, Bonnet C, Petit C, Benrahma H, Barakat A. Exome sequencing reveals pathogenic mutations in the LARS2 and HSD17B4 genes associated with Perrault syndrome and D-bifunctional protein deficiency in Moroccan families. Mol Biol Rep 2024; 51:850. [PMID: 39052101 DOI: 10.1007/s11033-024-09740-x] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/25/2024] [Accepted: 06/19/2024] [Indexed: 07/27/2024]
Abstract
BACKGROUND Syndromic hearing loss (SHL) is characterized by hearing impairment accompanied by other clinical manifestations, reaching over 400 syndromes. Early and accurate diagnosis is essential to understand the progression of hearing loss and associated systemic complications. METHODS AND RESULTS In this study, we investigated the genetic etiology of sensorineural hearing loss in three Moroccan patients using whole exome sequencing (WES). The results revealed in two families Perrault syndrome caused by LARS2, p. Asn153His; p. Thr629Met compound heterozygous variants in two siblings in one family; and p. Thr522Asn, a homozygous variant in two sisters in another. The patient in the third family was diagnosed with D-bifunctional protein deficiency (D-BPD), linked to compound heterozygous mutations p. Asn457Tyr and p. Val643Argfs*5 in HSD17B4. Molecular dynamic simulation results showed that Val643Argfs*5 does not prevent HSD17B4 protein from binding to the PEX5 receptor, but further studies are recommended to verify its effect on HSD17B4 protein functionality. CONCLUSION These results highlight the effectiveness of WES in identifying pathogenic mutations involved in heterogeneous disorders and the usefulness of bioinformatics in predicting their effects on protein structure.
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Affiliation(s)
- Assia Idyahia
- Genomics and Human Genetics Laboratory, Institut Pasteur du Maroc, 1 Place Louis Pasteur, Casablanca, 20360, Morocco
- Interdisciplinary Laboratory of Biotechnology and Health, Mohammed VI Higher Institute of Biosciences and Biotechnology, Mohammed VI University of Health Sciences (UM6SS), Casablanca, Morocco
| | - Salaheddine Redouan
- Genomics and Human Genetics Laboratory, Institut Pasteur du Maroc, 1 Place Louis Pasteur, Casablanca, 20360, Morocco
| | - Ghita Amalou
- Genomics and Human Genetics Laboratory, Institut Pasteur du Maroc, 1 Place Louis Pasteur, Casablanca, 20360, Morocco
| | - Hicham Charoute
- Research unit of epidemiology, biostatistics and bioinformatics, Institut Pasteur du Maroc, Casablanca, Morocco
| | - Houda Harmak
- Genomics and Human Genetics Laboratory, Institut Pasteur du Maroc, 1 Place Louis Pasteur, Casablanca, 20360, Morocco
| | - Crystel Bonnet
- Université Paris Cité, Institut Pasteur, AP-HP, Inserm, Fondation pour l'Audition, Institut de l'Audition, IHU reConnect, Paris, F-75012, France
| | - Christine Petit
- Université Paris Cité, Institut Pasteur, AP-HP, Inserm, Fondation pour l'Audition, Institut de l'Audition, IHU reConnect, Paris, F-75012, France
- Collège de France, Paris, F-75005, France
| | - Houda Benrahma
- Interdisciplinary Laboratory of Biotechnology and Health, Mohammed VI Higher Institute of Biosciences and Biotechnology, Mohammed VI University of Health Sciences (UM6SS), Casablanca, Morocco
| | - Abdelhamid Barakat
- Genomics and Human Genetics Laboratory, Institut Pasteur du Maroc, 1 Place Louis Pasteur, Casablanca, 20360, Morocco.
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Tsuchida S, Tenma A, Hamaue N, Murai T, Yoshimura T, Aoki T, Kurosawa T. Synthesis and Detection by HPLC of 3-Oxohexadecanoyl-CoA for the Study of Peroxisomal Bifunctional Proteins. J Oleo Sci 2017. [PMID: 28626134 DOI: 10.5650/jos.ess16239] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/13/2022] Open
Abstract
3-oxohexadecanoyl-CoA was synthesized for the study of D-bifunctional protein (EC 4. 2. 1. 107, EC 4. 2. 1. 119, EC 1. 1. 1. n12) and L-bifunctional protein (EC 4. 2. 1. 17, EC 5. 3. 3. 8, EC 1. 1. 1. 35). First, tetradecanal was subjected to the Reformatsky reaction with ethyl bromoacetate, and the product was then converted into ethyl 3-oxohexadecanoate. After acetalization of the 3-oxo ester with ethylene glycol, 3,3-ethlenedioxyhexadecanoic acid was obtained by alkaline hydrolysis. The acid was condensed with coenzyme A (CoA) by the mixed anhydride method, and the resulting CoA ester was deprotected with 4 M HCl to obtain 3-oxohexadecanoyl-CoA. In addition, the behavior of the CoA ester under several conditions of high-performance liquid chromatography (HPLC) was also investigated. We established separation detection of (R)-3-hydroxyhexadecanoyl-CoA, (S)-3-hydroxyhexadecaboyl-CoA, 3-oxohexadecanoyl-CoA, and trans-2-hexadecenoyl-CoA.
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Affiliation(s)
- Shirou Tsuchida
- Department of Molecular Biosciences, School of Pharmaceutical Sciences, Health Sciences University of Hokkaido
| | - Ayumu Tenma
- Department of Molecular Biosciences, School of Pharmaceutical Sciences, Health Sciences University of Hokkaido
| | - Naoya Hamaue
- Department of Molecular Biosciences, School of Pharmaceutical Sciences, Health Sciences University of Hokkaido
| | - Tsuyoshi Murai
- Department of Molecular Biosciences, School of Pharmaceutical Sciences, Health Sciences University of Hokkaido
| | - Teruki Yoshimura
- Department of Molecular Biosciences, School of Pharmaceutical Sciences, Health Sciences University of Hokkaido
| | - Takashi Aoki
- Department of Molecular Biosciences, School of Pharmaceutical Sciences, Health Sciences University of Hokkaido
| | - Takao Kurosawa
- Department of Molecular Biosciences, School of Pharmaceutical Sciences, Health Sciences University of Hokkaido
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Tsuchida S, Osaka A, Abe Y, Hamaue N, Aoki T. Effects of naturally occurring missense mutations and G525V in the hydratase domain of human d-bifunctional protein on hydratase activity. Mol Genet Metab Rep 2014. [PMID: 28649525 PMCID: PMC5471156 DOI: 10.1016/j.ymgmr.2014.12.003] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.1] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/21/2022] Open
Abstract
d-bifunctional protein (d-BP) deficiency is thought to lead to severe lipid metabolism disorders. To investigate the effect of naturally occurring missense mutations in the hydratase domain in d-BP, we constructed several d-BP hydratase variants and measured their activities. Missense mutations at sites whose conservation rates among 30 eukaryotes were < 70% did not affect hydratase activity. We predicted that missense mutations of highly conserved amino acids would markedly reduce activity. However, R562H and R562L, naturally occurring missense mutations of highly conserved amino acids, did not reduce activity. This result suggests that a missense mutation in a highly conserved amino acid does not always lead to severe lipid metabolism disorders. We also investigated the effect of G525V, which had been found in a mildly symptomatic patient with d-BP deficiency who was heterozygous for G525 and G658X. G525V markedly reduced hydratase activity. We had predicted that heterozygous G525V and G658X would lead to severely disordered lipid metabolism. However, the symptoms were inconsistent with this prediction. Characterizing mutations in the d-BP gene and the symptoms of d-BP deficiency may require pleiotropy, not only in vitro, studies.
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Affiliation(s)
- Shirou Tsuchida
- Department of Molecular Biosciences, School of Pharmaceutical Sciences, Health Sciences University of Hokkaido, 1757 Kanazawa, Tobetsu-cho, Ishikari-gun, Hokkaido 061-0293, Japan
| | - Akihiro Osaka
- Department of Molecular Biosciences, School of Pharmaceutical Sciences, Health Sciences University of Hokkaido, 1757 Kanazawa, Tobetsu-cho, Ishikari-gun, Hokkaido 061-0293, Japan
| | - Yuya Abe
- Department of Molecular Biosciences, School of Pharmaceutical Sciences, Health Sciences University of Hokkaido, 1757 Kanazawa, Tobetsu-cho, Ishikari-gun, Hokkaido 061-0293, Japan
| | - Naoya Hamaue
- Department of Molecular Biosciences, School of Pharmaceutical Sciences, Health Sciences University of Hokkaido, 1757 Kanazawa, Tobetsu-cho, Ishikari-gun, Hokkaido 061-0293, Japan
| | - Takashi Aoki
- Department of Molecular Biosciences, School of Pharmaceutical Sciences, Health Sciences University of Hokkaido, 1757 Kanazawa, Tobetsu-cho, Ishikari-gun, Hokkaido 061-0293, Japan
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