RGD Reference Report - CIT, a gene involved in neurogenic cytokinesis, is mutated in human primary microcephaly. - Rat Genome Database

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CIT, a gene involved in neurogenic cytokinesis, is mutated in human primary microcephaly.

Authors: Basit, S  Al-Harbi, KM  Alhijji, SA  Albalawi, AM  Alharby, E  Eldardear, A  Samman, MI 
Citation: Basit S, etal., Hum Genet. 2016 Oct;135(10):1199-207. doi: 10.1007/s00439-016-1724-0. Epub 2016 Aug 12.
RGD ID: 11553038
Pubmed: PMID:27519304   (View Abstract at PubMed)
DOI: DOI:10.1007/s00439-016-1724-0   (Journal Full-text)

Autosomal recessive primary microcephaly (MCPH) is a static neurodevelopmental disorder characterized by congenital small head circumference and non-progressive intellectual disability without additional severe brain malformations. MCPH is a genetically heterogeneous disorder. Sixteen genes (MCPH1-MCPH16) have been discovered so far, mutations thereof lead to autosomal recessive primary microcephaly. In a family, segregating MCPH in an autosomal recessive manner, genome-wide homozygosity mapping mapped a disease locus to 16.9-Mb region on chromosome 12q24.11-q24.32. Following this, exome sequencing in three affected individuals of the family discovered a splice site variant (c.753+3A>T) in citron kinase (CIT) gene, segregating with the disorder in the family. CIT co-localizes to the midbody ring during cytokinesis, and its loss of expression results in defects in neurogenic cytokinesis in both humans and mice. Splice site variant in CIT, identified in this study, is predicted to abolish splice donor site. cDNA sequence of an affected individual showed retention of an intron next to the splice donor site. The study, presented here, revealed the first variant in the CIT causing MCPH in the family.

RGD Manual Disease Annotations    Click to see Annotation Detail View
TermQualifierEvidenceWithReferenceNotesSourceOriginal Reference(s)
primary microcephaly susceptibilityIAGP 11553038DNA:splice-site mutation:intron (c.753+3A>T) (human)RGD 
primary microcephaly susceptibilityISOCIT (Homo sapiens)11553038; 11553038DNA:splice-site mutation:intron (c.753+3A>T) (human)RGD 

Objects Annotated

Genes (Rattus norvegicus)
Cit  (citron rho-interacting serine/threonine kinase)

Genes (Mus musculus)
Cit  (citron)

Genes (Homo sapiens)
CIT  (citron rho-interacting serine/threonine kinase)


Additional Information