{"status":"ok","message-type":"work","message-version":"1.0.0","message":{"indexed":{"date-parts":[[2025,8,19]],"date-time":"2025-08-19T10:23:11Z","timestamp":1755598991190,"version":"3.40.5"},"reference-count":45,"publisher":"Wiley","issue":"7","license":[{"start":{"date-parts":[[2022,7,25]],"date-time":"2022-07-25T00:00:00Z","timestamp":1658707200000},"content-version":"vor","delay-in-days":0,"URL":"http:\/\/onlinelibrary.wiley.com\/termsAndConditions#vor"}],"content-domain":{"domain":["onlinelibrary.wiley.com"],"crossmark-restriction":true},"short-container-title":["Intl J of Devlp Neuroscience"],"published-print":{"date-parts":[[2022,11]]},"abstract":"<jats:title>Abstract<\/jats:title><jats:p>Mitochondrial neurogastrointestinal encephalomyopathy (MNGIE; OMIM 603041) is a rare inherited metabolic disorder mostly caused by mutations in <jats:italic>TYMP<\/jats:italic> gene encoding thymidine phosphorylase (TP) protein that affects the mitochondrial nucleotide metabolism. TP, functionally active as a homodimer, is involved in the salvage pathway of pyrimidine nucleosides. MNGIE\u2010like syndrome having an overlapping phenotype of MNGIE was also described and has been associated with mutations in <jats:italic>POLG<\/jats:italic> and <jats:italic>RRM2B<\/jats:italic> genes. In the present study, we report the molecular investigation of a consanguineous family including two patients with clinical features suggestive of MNGIE syndrome. Bioinformatics analyses were carried out in addition to mtDNA deletion screening and copy number quantification in the blood of the two patients. Whole exome sequencing and Sanger sequencing analyses revealed the segregation in the affected family a novel mutation c.1205T&gt;A (p.L402Q) within the exon 9 of the <jats:italic>TYMP<\/jats:italic> gene. In addition, mtDNA analysis revealed the absence of mtDNA deletions and a decrease of the copy number in the blood of the two patients of the studied family. The p.Leu402Gln mutation was located in a conserved amino acid within the \u03b1\/\u03b2 domain of the TP protein and several software supported its pathogenicity. In addition, and based on docking and molecular dynamic simulation analyses, results revealed that L402Q caused a conformational change in TP mutated structure and could therefore alter its flexibility and stability. These changes prevent also the formation of stable homodimer leading to non\u2010functional protein with partial or complete loss of its catalytic activity.<\/jats:p>","DOI":"10.1002\/jdn.10215","type":"journal-article","created":{"date-parts":[[2022,7,16]],"date-time":"2022-07-16T03:24:12Z","timestamp":1657941852000},"page":"626-638","update-policy":"https:\/\/doi.org\/10.1002\/crossmark_policy","source":"Crossref","is-referenced-by-count":2,"title":["A novel thymidine phosphorylase mutation in a family with Mitochondrial Neurogastrointestinal Encephalomyopathy (MNGIE): Molecular docking, dynamic simulation and computational investigations"],"prefix":"10.1002","volume":"82","author":[{"ORCID":"https:\/\/orcid.org\/0000-0002-5178-8307","authenticated-orcid":false,"given":"Marwa","family":"Ammar","sequence":"first","affiliation":[{"name":"Laboratory of Molecular and Functional Genetics, Faculty of Sciences University of Sfax  Sfax Tunisia"}],"role":[{"role":"author","vocabulary":"crossref"}]},{"given":"Wajdi","family":"Safi","sequence":"additional","affiliation":[{"name":"Department of Endocrinology Diabetology CHU Hedi Chaker  Sfax Tunisia"}],"role":[{"role":"author","vocabulary":"crossref"}]},{"given":"Abdelaziz","family":"Tlili","sequence":"additional","affiliation":[{"name":"Department of Applied Biology, College of Sciences University of Sharjah  Sharjah United Arab Emirates"}],"role":[{"role":"author","vocabulary":"crossref"}]},{"given":"Olfa","family":"Alila\u2010Fersi","sequence":"additional","affiliation":[{"name":"Laboratory of Molecular and Functional Genetics, Faculty of Sciences University of Sfax  Sfax Tunisia"}],"role":[{"role":"author","vocabulary":"crossref"}]},{"given":"Fakher","family":"Frikha","sequence":"additional","affiliation":[{"name":"Laboratory of Molecular and Cellular Screening Processes, Center of Biotechnology of Sfax University of Sfax  Sfax Tunisia"}],"role":[{"role":"author","vocabulary":"crossref"}]},{"given":"Jihen","family":"Chouchen","sequence":"additional","affiliation":[{"name":"Department of Applied Biology, College of Sciences University of Sharjah  Sharjah United Arab Emirates"}],"role":[{"role":"author","vocabulary":"crossref"}]},{"given":"Fatma","family":"Mnif","sequence":"additional","affiliation":[{"name":"Department of Endocrinology Diabetology CHU Hedi Chaker  Sfax Tunisia"}],"role":[{"role":"author","vocabulary":"crossref"}]},{"given":"Marwa","family":"Kharrat","sequence":"additional","affiliation":[{"name":"Laboratory of Molecular and Functional Genetics, Faculty of Sciences University of Sfax  Sfax Tunisia"}],"role":[{"role":"author","vocabulary":"crossref"}]},{"given":"Marwa","family":"Maalej","sequence":"additional","affiliation":[{"name":"Laboratory of Molecular and Functional Genetics, Faculty of Sciences University of Sfax  Sfax Tunisia"}],"role":[{"role":"author","vocabulary":"crossref"}]},{"given":"Rahma","family":"Felhi","sequence":"additional","affiliation":[{"name":"Laboratory of Molecular and Functional Genetics, Faculty of Sciences University of Sfax  Sfax Tunisia"}],"role":[{"role":"author","vocabulary":"crossref"}]},{"given":"Mohamed","family":"Abid","sequence":"additional","affiliation":[{"name":"Department of Endocrinology Diabetology CHU Hedi Chaker  Sfax Tunisia"}],"role":[{"role":"author","vocabulary":"crossref"}]},{"given":"Mouna","family":"Mnif\u2010Feki","sequence":"additional","affiliation":[{"name":"Department of Endocrinology Diabetology CHU Hedi Chaker  Sfax Tunisia"}],"role":[{"role":"author","vocabulary":"crossref"}]},{"given":"Faten Hadj","family":"Kacem","sequence":"additional","affiliation":[{"name":"Department of Endocrinology Diabetology CHU Hedi Chaker  Sfax Tunisia"}],"role":[{"role":"author","vocabulary":"crossref"}]},{"given":"Faiza","family":"Fakhfakh","sequence":"additional","affiliation":[{"name":"Laboratory of Molecular and Functional Genetics, Faculty of Sciences University of Sfax  Sfax Tunisia"}],"role":[{"role":"author","vocabulary":"crossref"}]},{"given":"Emna","family":"Mkaouar\u2010Rebai","sequence":"additional","affiliation":[{"name":"Laboratory of Molecular and Functional Genetics, Faculty of Sciences University of Sfax  Sfax Tunisia"}],"role":[{"role":"author","vocabulary":"crossref"}]}],"member":"311","published-online":{"date-parts":[[2022,7,25]]},"reference":[{"key":"e_1_2_13_2_1","doi-asserted-by":"publisher","DOI":"10.1007\/s12031-020-01516-9"},{"key":"e_1_2_13_3_1","doi-asserted-by":"publisher","DOI":"10.1016\/S1525-1578(10)60595-8"},{"key":"e_1_2_13_4_1","doi-asserted-by":"publisher","DOI":"10.1371\/journal.pone.0186666"},{"key":"e_1_2_13_5_1","doi-asserted-by":"publisher","DOI":"10.1016\/j.arcped.2014.08.006"},{"key":"e_1_2_13_6_1","doi-asserted-by":"publisher","DOI":"10.1007\/s00415-019-09619-z"},{"issue":"6","key":"e_1_2_13_7_1","first-page":"588","article-title":"Mitochondrial neurogastrointestinal encephalomyopathy","volume":"12","author":"Borhani H. 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