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    J Hum Genet. 2011 Jan;56(1):80-2. Epub 2010 Oct 14.

    Characterization of a mutation commonly associated with persistent stuttering: evidence for a founder mutation.

    Source

    National Institute on Deafness and Other Communication Disorders, National Institutes of Health, Rockville, MD 20850, USA.

    Abstract

    Stuttering is a disorder that affects the fluency of speech. It has been shown to have high heritability and has recently been linked to mutations in the GNPTAB gene. One such mutation, Glu1200Lys, has been repeatedly observed in unrelated families and individual cases. Eight unrelated individuals carrying this mutation were analyzed in an effort to distinguish whether these arise from repeated mutation at the same site, or whether they represent a founder mutation with a single origin. Results show that all 12 chromosomes carrying this mutation share a common haplotype in this region, indicating that it is a founder mutation. Further analysis estimated the age of this allele to be ∼ 572 generations. Construction of a cladogram tracing the mutation through our study sample also supports the founder mutation hypothesis.

    PMID:
    20944643
    [PubMed - indexed for MEDLINE]
    PMCID:
    PMC3024470
    Free PMC Article

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