Mutations

MAPT N255N

Overview

Pathogenicity: Frontotemporal Dementia : Not Pathogenic
Clinical Phenotype: None
Genomic Mutation Name (MET1): g.110013T>C
Genomic Mutation Name (NT1): g.107187T>C
dbSNP ID: rs17652121
Coding/Non-Coding: Coding
Genomic Region: Exon 9
Mutation Type: Point, Silent
Codon Change: AAT to AAC

Findings

This variant in exon 9 is a relatively common polymorphism and is not associated with pathogenicity. It was originally found in 21 percent of 22 control individuals tested (Poorkaj et al., 1998) and has since been detected in many datasets of both control and affected individuals (e.g Rizzu et al., 1999; Houlden et al., 1999; Guerreiro et al., 2010).

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References

Paper Citations

  1. . Tau is a candidate gene for chromosome 17 frontotemporal dementia. Ann Neurol. 1998 Jun;43(6):815-25. PubMed.
  2. . High prevalence of mutations in the microtubule-associated protein tau in a population study of frontotemporal dementia in the Netherlands. Am J Hum Genet. 1999 Feb 1;64(2) PubMed.
  3. . Frequency of tau mutations in three series of non-Alzheimer's degenerative dementia. Ann Neurol. 1999 Aug;46(2):243-8. PubMed.
  4. . A thorough assessment of benign genetic variability in GRN and MAPT. Hum Mutat. 2010 Feb;31(2):E1126-40. PubMed.

Further Reading

Papers

  1. . TAU mutations are not a predominant cause of frontotemporal dementia in Canadian patients. Can J Neurol Sci. 2004 Aug;31(3):363-7. PubMed.
  2. . Association of an extended haplotype in the tau gene with progressive supranuclear palsy. Hum Mol Genet. 1999 Apr;8(4):711-5. PubMed.
  3. . Frequency of tau mutations in familial and sporadic frontotemporal dementia and other tauopathies. J Neurol. 2004 Sep;251(9):1098-104. PubMed.
  4. . Mutation screening of the tau gene in patients with early-onset Alzheimer's disease. Neurosci Lett. 1999 Dec 24;277(2):137-9. PubMed.
  5. . Frequency of tau gene mutations in familial and sporadic cases of non-Alzheimer dementia. Arch Neurol. 2001 Mar;58(3):383-7. PubMed.
  6. . Increased risk for frontotemporal dementia through interaction between tau polymorphisms and apolipoprotein E epsilon4. Neuroreport. 2001 Apr 17;12(5):905-9. PubMed.

Learn More

Alzheimer Disease & Frontotemporal Dementia Mutation Database

Primary Papers

  1. . Tau is a candidate gene for chromosome 17 frontotemporal dementia. Ann Neurol. 1998 Jun;43(6):815-25. PubMed.