ArticleJournal of human genetics2023
Recurrence mutation in RBBP8 gene causing non-syndromic autosomal recessive primary microcephaly; geometric simulation approach for insight into predicted computational models.
Article in Journal of human genetics, 2023. The graph could read no effect estimate from its abstract, so it casts no vote on the map. Cited by 3 papers, 1 of them a synthesis that pooled it.
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3 citing papers in PubMed, 1 synthesis or guideline pooled it, 6 citations in OpenAlex.
- A systematic review of hereditary neurological disorders diagnosed by whole exome sequencing in Pakistani population: updates from 2014 to November 2024.Neurogenetics · 2025Pooled it
- Clinical genomics expands the link between erroneous cell division, primary microcephaly and intellectual disability.Neurogenetics · 2024Article
- Microcephaly, Short Stature, Intellectual Disability, Speech Absence and Cataract Are Associated with Novel Bi-Allelic Missense Variant inChildren (Basel, Switzerland) · 2023Article
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6 authors at 4 institutions in 2 countries.
Funding
No grant is acknowledged in the PubMed record.
Abstract
Primary microcephaly is a rare, congenital, and genetically heterogeneous disorder in which occipitofrontal head circumference is reduced by a minimum of three standard deviations (SDs) from average because of the defect in fetal brain development.
objectiveMapping of RBBP8 gene mutation that produce autosomal recessive primary microcephaly. Insilco RBBP8 protein models prediction and analysis.
methodsConsanguineous Pakistani family affected with non-syndromic primary microcephaly was mapped a biallelic sequence variant (c.1807_1808delAT) in the RBBP8 gene via whole-exome sequencing. The deleted variant in the RBBP8 gene in affected siblings (V:4, V:6) of primary microcephaly was confirmed by sanger sequencing.
resultsIdentified variant c.1807_1808delAT that truncated the protein translation p. Ile603Lysfs*7 and impaired the functioning of RBBP8 protein. This sequence variant was only reported previously in Atypical Seckel syndrome and Jawad syndrome, while we mapped it in the non-syndromic primary microcephaly family. We predicted 3D protein models by using Insilco tools like I TASSER, Swiss model, and phyre2 of wild RBBP8 protein of 897 amino acids and 608 amino acids of the mutant protein. These models were validated through the online SAVES server and Ramachandran plot and refined by using the Galaxy WEB server. A predicted and refined wild protein 3D model was deposited with accession number PM0083523 in Protein Model Database. A normal mode-based geometric simulation approach was used through the NMSim program, to find out the structural diversity of wild and mutant proteins which were evaluated by RMSD and RMSF. Higher RMSD and RMSF in mutant protein reduced the stability of the protein.
conclusionThe high possibility of this variant results in nonsense-mediated decay of mRNA, leading to the loss of protein functioning which causes primary microcephaly.
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