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  Identical by descent L1CAM mutation in two apparently unrelated families with intellectual disability without L1 syndrome

Shaw, M., Yap, T. Y., Henden, L., Bahlo, M., Gardner, A., Kalscheuer, V. M., et al. (2015). Identical by descent L1CAM mutation in two apparently unrelated families with intellectual disability without L1 syndrome. European Journal of Medical Genetics, 58(6-7), 364-368. doi:10.1016/j.ejmg.2015.04.004.

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© 2015 Elsevier Masson SAS
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Shaw, M., Author
Yap, T. Y., Author
Henden, L., Author
Bahlo, M., Author
Gardner, A., Author
Kalscheuer, V. M.1, Author           
Haan, E., Author
Christie, L., Author
Hackett, A., Author
Gecz, J., Author
Affiliations:
1Chromosome Rearrangements and Disease (Vera Kalscheuer), Research Group Development & Disease (Head: Stefan Mundlos), Max Planck Institute for Molecular Genetics, Max Planck Society, ou_1479642              

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Free keywords: Adult Female Genetic Diseases, X-Linked/diagnosis/*genetics Humans Intellectual Disability/diagnosis/*genetics Male *Mutation, Missense Neural Cell Adhesion Molecule L1/*genetics Pedigree Polymorphism, Single Nucleotide Spastic Paraplegia, Hereditary/diagnosis/*genetics Identical by descent L1cam Massively parallel sequencing X-chromosome exome X-linked intellectual disability
 Abstract: Mutations in the L1 Cell Adhesion Molecule (L1CAM) gene (MIM#308840) cause a variety of X-linked recessive neurological disorders collectively called L1 syndrome. Using massively parallel sequencing (MPS) of the X-chromosome exome, we identified a novel missense variant in L1CAM in two Caucasian families with mild-moderate intellectual disability without obvious L1 syndrome features. These families were not known to be related. SNP data extracted from MPS identified a 5.6 cM tract of identity by descent (IBD), encompassing the L1CAM gene, between the DNA of the two probands. This cannot be explained by chance alone and strongly implies that the two families are related. It also suggests that the L1CAM (NM_000425.3, c.604G > A, p.D202N) variant is pathogenic. This report also demonstrates the usefulness of additional information, which can be extracted from exome sequencing data.

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Language(s): eng - English
 Dates: 2015-04-282015-06
 Publication Status: Published in print
 Pages: 5
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 Table of Contents: -
 Rev. Type: -
 Identifiers: DOI: 10.1016/j.ejmg.2015.04.004
ISSN: 1878-0849 (Electronic)1769-7212 (Print)
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Title: European Journal of Medical Genetics
  Other : Eur. J. Med. Gen.
Source Genre: Journal
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Publ. Info: Amsterdam : Elsevier Masson SAS
Pages: - Volume / Issue: 58 (6-7) Sequence Number: - Start / End Page: 364 - 368 Identifier: ISSN: 1769-7212
CoNE: https://pure.mpg.de/cone/journals/resource/954925379964