{"status":"ok","message-type":"work","message-version":"1.0.0","message":{"indexed":{"date-parts":[[2026,2,3]],"date-time":"2026-02-03T18:31:54Z","timestamp":1770143514448,"version":"3.49.0"},"reference-count":59,"publisher":"MDPI AG","issue":"10","license":[{"start":{"date-parts":[[2025,10,15]],"date-time":"2025-10-15T00:00:00Z","timestamp":1760486400000},"content-version":"vor","delay-in-days":0,"URL":"https:\/\/creativecommons.org\/licenses\/by\/4.0\/"}],"content-domain":{"domain":[],"crossmark-restriction":false},"short-container-title":["CIMB"],"abstract":"<jats:p>Vitamin D deficiency is highly prevalent in Pakistan, but there is limited data on its genetic aspects. This case\u2013control pilot study aimed to determine the association of rs782153744, rs200183599, rs118204011, and rs28934604 with vitamin D deficiency along rs7041 which has been studied in our population. The DNA of a total of 600 subjects (300 cases and 300 controls) was extracted and genotyped by tetra ARMS PCR, followed by Sanger DNA sequencing of exon 4 of the CYP2R1 and CYP27B1 genes and exon 8 of the GC gene. SNP Stat was employed to analyze the data, while logistic regression was used to calculate the p-values and odds ratios (ORs). The R package version R studio (2025.05.1) Build 513 was used to statistically analyze rs782153744. In silico modeling of wild and mutant CYP2R1 and GC proteins was performed in Swiss-Model, Swiss-Dock, Discovery Studio, and PyMol using 3c6g and IJ78 as templates to perform binding pocket analysis of vitamin D3. The rs782153744 showed a protective association in the additive (OR: 0.15, 95% CI: 0.08\u20130.27, p-value &lt; 0.001), recessive (OR: 0.19, 95% CI: 0.10\u20130.33, p-value &lt; 0.001), and dominant (OR: 0.19, CI = 0.10\u20130.33, p-value &lt; 0.001) models, while GC rs7041 (T &gt; A, T &gt; G) displayed a p-value &lt; 0.0001 across all genetic models. Sanger sequencing yielded insignificant results, and the SNPs rs200183599, rs118204011, and rs28934604 had no significant association with vitamin D deficiency. The molecular pocket analysis of wild and mutant CYP2R1 proteins carrying rs782153744 polymorphisms revealed no changes. GC proteins carrying the rs7041 polymorphism revealed a shift in their 3D and 2D configuration, as well as a change in the amino acid residue of the binding pocket of VD3. The risk-associated rs7041 and protective rs782153744 variants back genetic screening for vitamin D deficiency risk stratification, allowing targeted supplementation in predisposed subjects and assisting in formulating a genotype-specific therapeutic approach.<\/jats:p>","DOI":"10.3390\/cimb47100849","type":"journal-article","created":{"date-parts":[[2025,10,15]],"date-time":"2025-10-15T14:04:02Z","timestamp":1760537042000},"page":"849","update-policy":"https:\/\/doi.org\/10.3390\/mdpi_crossmark_policy","source":"Crossref","is-referenced-by-count":1,"title":["Identification and Association of CYP2R1, CYP27B1, and GC Gene Polymorphisms with Vitamin D Deficiency in Apparently Healthy Population and in Silico Analysis of the Binding Pocket of Vitamin D3"],"prefix":"10.3390","volume":"47","author":[{"ORCID":"https:\/\/orcid.org\/0009-0004-5529-6117","authenticated-orcid":false,"given":"Saima","family":"Manzoor","sequence":"first","affiliation":[{"name":"Department of Biochemistry and Molecular Biology, Army Medical College, National University of Medical Sciences, Abid Majeed Road, Rawalpindi 46000, Pakistan"}],"role":[{"role":"author","vocabulary":"crossref"}]},{"ORCID":"https:\/\/orcid.org\/0000-0002-3972-719X","authenticated-orcid":false,"given":"Asifa","family":"Majeed","sequence":"additional","affiliation":[{"name":"Department of Biochemistry and Molecular Biology, Army Medical College, National University of Medical Sciences, Abid Majeed Road, Rawalpindi 46000, Pakistan"}],"role":[{"role":"author","vocabulary":"crossref"}]},{"ORCID":"https:\/\/orcid.org\/0000-0002-7106-8091","authenticated-orcid":false,"given":"Palvasha","family":"Waheed","sequence":"additional","affiliation":[{"name":"Department of Biochemistry and Molecular Biology, Army Medical College, National University of Medical Sciences, Abid Majeed Road, Rawalpindi 46000, Pakistan"}],"role":[{"role":"author","vocabulary":"crossref"}]},{"ORCID":"https:\/\/orcid.org\/0000-0002-8510-2991","authenticated-orcid":false,"given":"Amir","family":"Rashid","sequence":"additional","affiliation":[{"name":"Department of Biochemistry and Molecular Biology, Army Medical College, National University of Medical Sciences, Abid Majeed Road, Rawalpindi 46000, Pakistan"}],"role":[{"role":"author","vocabulary":"crossref"}]}],"member":"1968","published-online":{"date-parts":[[2025,10,15]]},"reference":[{"key":"ref_1","doi-asserted-by":"crossref","unstructured":"K\u00e4gi, L., Bettoni, C., Pastor-Arroyo, E.M., Schnitzbauer, U., Hernando, N., and Wagner, C.A. 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