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Journal Article
Novel compound heterozygous mutations in MCPH1 gene causes primary microcephaly in Saudi family.
OBJECTIVE: To identify genetic variation involved in primary microcephaly.
METHODS: In present study we identified 4 generation Saudi family showing primary microcephaly. We performed whole exome sequencing along with Sanger sequencing to find the genetic defect in this family. This study was conducted in King Abdulaziz University started from 2016 and the results presented in this manuscript are from one of the family.
RESULTS: Two novel missense variants (c.982G>A and c.1273T>A) were identified in heterozygous state in exon 8 of MCPH1 gene. The detected missense variants cause a tyrosine to asparagine substitution of residue 425 and a valine to isoleucine substitution at residue 310. MCPH1 gene encodes a DNA damage response protein. The encoded protein play a role in G2/M DNA damage checkpoint arrest via maintenance of inhibitory phosphorylation of cyclin-dependent kinase 1. The respective mutation was ruled out in 100 control samples.
CONCLUSION: We found novel compound heterozygous mutation in Saudi family that will help to build database for genetic mutations in population and pave way to devise strategies to tackle such disorders in future.
METHODS: In present study we identified 4 generation Saudi family showing primary microcephaly. We performed whole exome sequencing along with Sanger sequencing to find the genetic defect in this family. This study was conducted in King Abdulaziz University started from 2016 and the results presented in this manuscript are from one of the family.
RESULTS: Two novel missense variants (c.982G>A and c.1273T>A) were identified in heterozygous state in exon 8 of MCPH1 gene. The detected missense variants cause a tyrosine to asparagine substitution of residue 425 and a valine to isoleucine substitution at residue 310. MCPH1 gene encodes a DNA damage response protein. The encoded protein play a role in G2/M DNA damage checkpoint arrest via maintenance of inhibitory phosphorylation of cyclin-dependent kinase 1. The respective mutation was ruled out in 100 control samples.
CONCLUSION: We found novel compound heterozygous mutation in Saudi family that will help to build database for genetic mutations in population and pave way to devise strategies to tackle such disorders in future.
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