{"status":"ok","message-type":"work","message-version":"1.0.0","message":{"indexed":{"date-parts":[[2026,2,15]],"date-time":"2026-02-15T21:30:14Z","timestamp":1771191014668,"version":"3.50.1"},"reference-count":40,"publisher":"Wiley","issue":"7","license":[{"start":{"date-parts":[[2018,4,16]],"date-time":"2018-04-16T00:00:00Z","timestamp":1523836800000},"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":["J of Cellular Biochemistry"],"published-print":{"date-parts":[[2018,7]]},"abstract":"<jats:title>Abstract<\/jats:title><jats:sec><jats:label\/><jats:p>Variations in mitochondrial genes have an established link with myoclonic epilepsy. In the present study we evaluated the nucleotide sequence of <jats:italic>MT\u2010TK<\/jats:italic> gene of 52 individuals from 12 unrelated families and reported three variations in 2 of the 13 epileptic patients. The DNA sequences coding for <jats:italic>MT\u2010TK<\/jats:italic> gene were sequenced and mutations were detected in all participants. The mutations were further analyzed by the in silico analysis and their structural and pathogenic effects were determined. All the investigated patients had symptoms of myoclonus, 61.5% were positive for ataxia, 23.07% were suffering from hearing loss, 15.38% were having mild to severe dementia, 69.23% were males, and 61.53% had cousin marriage in their family history. DNA extracted from saliva was used for the PCR amplification of a 440\u2009bp DNA fragment encompassing complete <jats:italic>MT\u2010TK<\/jats:italic> gene. The nucleotide sequence analysis revealed three mutations, m.8306T&gt;C,\u2009m.8313G&gt;C, and m.8362T&gt;G that are divergent from available reports. The identified mutations designate the heteroplasmic condition. Furthermore, pathogenicity of the identified variants was predicted by in silico tools viz., PON\u2010mt\u2010tRNA and MitoTIP. Secondary structure of altered MT\u2010TK was predicted by RNAStructure web server. Studies by MitoTIP and PON\u2010mt\u2010tRNA tools have provided strong evidences of pathogenic effects of these mutations. Single nucleotide variations resulted in disruptive secondary structure of mutant MT\u2010TK models, as predicted by RNAStructure. In vivo confirmation of structural and pathogenic effects of identified mutations in the animal models can be prolonged on the basis of these findings.<\/jats:p><\/jats:sec>","DOI":"10.1002\/jcb.26857","type":"journal-article","created":{"date-parts":[[2018,4,17]],"date-time":"2018-04-17T03:47:14Z","timestamp":1523936834000},"page":"6258-6265","update-policy":"https:\/\/doi.org\/10.1002\/crossmark_policy","source":"Crossref","is-referenced-by-count":5,"title":["Identification of variants in the mitochondrial lysine\u2010tRNA (<i>MT\u2010TK<\/i>) gene in myoclonic epilepsy\u2014pathogenicity evaluation and structural characterization by in silico approach"],"prefix":"10.1002","volume":"119","author":[{"given":"Muhammad S.","family":"Nadeem","sequence":"first","affiliation":[{"name":"Department of Biochemistry Faculty of Science King Abdul Aziz University Jeddah Saudi Arabia"}],"role":[{"role":"author","vocabulary":"crossref"}]},{"given":"Habib","family":"Ahmad","sequence":"additional","affiliation":[{"name":"Department of Genetics Faculty of Life Sciences Hazara University Mansehra Pakistan"}],"role":[{"role":"author","vocabulary":"crossref"}]},{"given":"Kaleemuddin","family":"Mohammed","sequence":"additional","affiliation":[{"name":"Department of Biochemistry Faculty of Science King Abdul Aziz University Jeddah Saudi Arabia"}],"role":[{"role":"author","vocabulary":"crossref"}]},{"given":"Khushi","family":"Muhammad","sequence":"additional","affiliation":[{"name":"Department of Genetics Faculty of Life Sciences Hazara University Mansehra Pakistan"}],"role":[{"role":"author","vocabulary":"crossref"}]},{"given":"Inam","family":"Ullah","sequence":"additional","affiliation":[{"name":"Department of Genetics Faculty of Life Sciences Hazara University Mansehra Pakistan"}],"role":[{"role":"author","vocabulary":"crossref"}]},{"given":"Othman A. 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