{"status":"ok","message-type":"work","message-version":"1.0.0","message":{"indexed":{"date-parts":[[2026,5,1]],"date-time":"2026-05-01T18:29:48Z","timestamp":1777660188289,"version":"3.51.4"},"reference-count":63,"publisher":"SAGE Publications","issue":"1","license":[{"start":{"date-parts":[[2026,1,1]],"date-time":"2026-01-01T00:00:00Z","timestamp":1767225600000},"content-version":"tdm","delay-in-days":0,"URL":"https:\/\/journals.sagepub.com\/page\/policies\/text-and-data-mining-license"}],"funder":[{"name":"Higher Education Commission (HEC), Islamabad, Pakistan funded National Research Program for Universities","award":["15459"],"award-info":[{"award-number":["15459"]}]}],"content-domain":{"domain":["journals.sagepub.com"],"crossmark-restriction":true},"short-container-title":["Genetic Testing and Molecular Biomarkers"],"published-print":{"date-parts":[[2026,1]]},"abstract":"<jats:sec>\n                    <jats:title>Background:<\/jats:title>\n                    <jats:p>Postaxial polydactyly (PAP) is characterized by the development of extra digits at the fifth finger. It can occur as an isolated disease or a part of a syndrome. The genetic basis of nonsyndromic PAP has been linked to sequence variants in different genes. The aim of the present study was to identify the causative genetic variants in four Pakistani families demonstrating PAP.<\/jats:p>\n                  <\/jats:sec>\n                  <jats:sec>\n                    <jats:title>Methods:<\/jats:title>\n                    <jats:p>Causative genetic variants were identified using whole-exome sequencing and microsatellite mapping, followed by validation through Sanger sequencing. Further analysis was carried out through conservation, structural modeling, and 100-ns molecular dynamic simulations of GLI1.<\/jats:p>\n                  <\/jats:sec>\n                  <jats:sec>\n                    <jats:title>Results:<\/jats:title>\n                    <jats:p>\n                      Whole-exome and targeted sequencing in four families (A, B, C, and D) identified novel variants in the\n                      <jats:italic toggle=\"yes\">GLI1<\/jats:italic>\n                      (c.1013G&gt;T; p.Cys338Phe), and\n                      <jats:italic toggle=\"yes\">GLI3<\/jats:italic>\n                      (c.2003C&gt;T; p.Pro668Leu and c.4564delG; p.Ala1522ProfsTer2), and a recurrent variant in\n                      <jats:italic toggle=\"yes\">IQCE<\/jats:italic>\n                      genes (c.895_904del; p.Val301SerfsTer8) linked to 7p22.3. All the variants were highly conserved across different species. Comparative analysis of the GLI1\n                      <jats:sup>WT<\/jats:sup>\n                      and GLI1\n                      <jats:sup>Cys338Phe<\/jats:sup>\n                      proteins revealed domain fluctuations leading to the loss of structurally and functionally important inter- and intramolecular interactions. The three-dimensional structural analysis of the GLI3 protein showed that the missense variant p. (Pro668Leu) disturbed the protein folding and intra-residue interaction, while the frameshift variant p. (Ala1522ProfsTer2) led to the loss of the C-terminus of the protein. Similarly, the IQCE structural analysis confirmed the loss of protein function due to frameshift and C-terminal deletion.\n                    <\/jats:p>\n                  <\/jats:sec>\n                  <jats:sec>\n                    <jats:title>Conclusion:<\/jats:title>\n                    <jats:p>This study has broadened the phenotypic and allelic spectrum of the genes associated with isolated PAP and strengthened the role of these genes in regulating limb development.<\/jats:p>\n                  <\/jats:sec>","DOI":"10.1177\/19450265251401006","type":"journal-article","created":{"date-parts":[[2025,12,4]],"date-time":"2025-12-04T02:01:00Z","timestamp":1764813660000},"page":"1-14","update-policy":"https:\/\/doi.org\/10.1177\/sage-journals-update-policy","source":"Crossref","is-referenced-by-count":0,"title":["Expanding the Phenotypic and Genotypic Spectrum of Postaxial Polydactyly: A Study of Four Consanguineous Pakistani Families"],"prefix":"10.1177","volume":"30","author":[{"given":"Tayyaba","family":"Saeed","sequence":"first","affiliation":[{"name":"Department of Biochemistry, Hazara University, Mansehra, Pakistan."}],"role":[{"role":"author","vocabulary":"crossref"}]},{"given":"Bushra","family":"Khan","sequence":"additional","affiliation":[{"name":"Department Biochemistry, Abdul Wali Khan University, Mardan, Pakistan."}],"role":[{"role":"author","vocabulary":"crossref"}]},{"given":"Muhammad Haris","family":"Khan","sequence":"additional","affiliation":[{"name":"Department Biochemistry, Abdul Wali Khan University, Mardan, Pakistan."}],"role":[{"role":"author","vocabulary":"crossref"}]},{"given":"Zahid","family":"Azeem","sequence":"additional","affiliation":[{"name":"Department Biochemistry, AJK Medical College Muzaffarabad, Muzaffarad, Pakistan."}],"role":[{"role":"author","vocabulary":"crossref"}]},{"given":"Fozia","family":"fozia","sequence":"additional","affiliation":[{"name":"Department of Biochemistry, KMU Institute of Medical Sciences, Kohat, Pakistan."}],"role":[{"role":"author","vocabulary":"crossref"}]},{"given":"Sajid","family":"Ali","sequence":"additional","affiliation":[{"name":"Department of Biochemistry, Hazara University, Mansehra, Pakistan."}],"role":[{"role":"author","vocabulary":"crossref"}]},{"given":"Maryam","family":"Rahmat","sequence":"additional","affiliation":[{"name":"Department of Biochemistry, Hazara University, Mansehra, Pakistan."}],"role":[{"role":"author","vocabulary":"crossref"}]},{"given":"Saadullah","family":"Khan","sequence":"additional","affiliation":[{"name":"Department of Biotechnology and Genetic Engineering, Kohat University of Science and Technology, Kohat, Pakistan."}],"role":[{"role":"author","vocabulary":"crossref"}]},{"given":"Nousheen","family":"bibi","sequence":"additional","affiliation":[{"name":"Department of Bioinformatics, Shaheed Benazir Bhutto Women University, Peshawar, Pakistan."}],"role":[{"role":"author","vocabulary":"crossref"}]},{"given":"Umm-e-","family":"Kalsoom","sequence":"additional","affiliation":[{"name":"Department of Biochemistry, Hazara University, Mansehra, Pakistan."}],"role":[{"role":"author","vocabulary":"crossref"}]}],"member":"179","published-online":{"date-parts":[[2026,1,19]]},"reference":[{"key":"e_1_3_6_2_1","doi-asserted-by":"publisher","DOI":"10.1089\/gtmb.2019.0071"},{"key":"e_1_3_6_3_1","doi-asserted-by":"publisher","DOI":"10.1002\/bies.200900066"},{"key":"e_1_3_6_4_1","doi-asserted-by":"publisher","DOI":"10.3390\/genes14040869"},{"key":"e_1_3_6_5_1","first-page":"644","article-title":"Exome sequencing identifies a novel and a recurrent BBS1 mutation in Pakistani families with Bardet-Biedl syndrome","volume":"19","author":"Ajmal M","year":"2013","unstructured":"Ajmal M, , Khan MI, , Neveling K, et al. 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