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Am J Hum Genet. 2012 Feb 10;90(2):356-62. doi: 10.1016/j.ajhg.2011.12.018. Epub 2012 Jan 26.

Mutations in KIF11 cause autosomal-dominant microcephaly variably associated with congenital lymphedema and chorioretinopathy.

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  • 1Medical Genetics Unit, Biomedical Sciences, St. George's University of London, UK.

Abstract

We have identified KIF11 mutations in individuals with syndromic autosomal-dominant microcephaly associated with lymphedema and/or chorioretinopathy. Initial whole-exome sequencing revealed heterozygous KIF11 mutations in three individuals with a combination of microcephaly and lymphedema from a microcephaly-lymphedema-chorioretinal-dysplasia cohort. Subsequent Sanger sequencing of KIF11 in a further 15 unrelated microcephalic probands with lymphedema and/or chorioretinopathy identified additional heterozygous mutations in 12 of them. KIF11 encodes EG5, a homotetramer kinesin motor. The variety of mutations we have found (two nonsense, two splice site, four missense, and six indels causing frameshifts) are all predicted to have an impact on protein function. EG5 has previously been shown to play a role in spindle assembly and function, and these findings highlight the critical role of proteins necessary for spindle formation in CNS development. Moreover, identification of KIF11 mutations in patients with chorioretinopathy and lymphedema suggests that EG5 is involved in the development and maintenance of retinal and lymphatic structures.

Copyright © 2012 The American Society of Human Genetics. Published by Elsevier Inc. All rights reserved.

PMID:
22284827
[PubMed - indexed for MEDLINE]
PMCID:
PMC3276660
Free PMC Article

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