Mutations

MAPT R370W

Overview

Pathogenicity: Frontotemporal Dementia : Benign
Clinical Phenotype: None
Reference Assembly: GRCh37/hg19
Position: Chr17:44061278 C>T
dbSNP ID: rs17651549
Coding/Non-Coding: Coding
DNA Change: Substitution
Expected RNA Consequence: Substitution
Expected Protein Consequence: Missense
Codon Change: CGG to TGG
Reference Isoform: Tau Isoform Tau-G (776 aa)
Genomic Region: Exon 4a

Findings

This variant in exon 4a of MAPT is thought to be benign. Originally described according to nucleotide position in exon 4a (735), this variant was associated with a haplotype more common in controls than Alzheimer's disease patients (Lilius et al., 1999).

Exon 4a is excluded from the six major tau isoforms expressed in the human brain, but it is present in PNS-tau (P10636-1) and Tau-G (P10636-9), which are 758 and 776 amino acids long, respectively. Therefore, the position of this variant is in reference to these isoforms, rather than to isoform Tau-F (P10636-8).

Neuropathology

Not applicable.

Biological Effect

Unknown.

Last Updated: 20 Mar 2024

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References

Paper Citations

  1. Lilius L, Froelich Fabre S, Basun H, Forsell C, Axelman K, Mattila K, Andreadis A, Viitanen M, Winblad B, Fratiglioni L, Lannfelt L. Tau gene polymorphisms and apolipoprotein E epsilon4 may interact to increase risk for Alzheimer's disease. Neurosci Lett. 1999 Dec 17;277(1):29-32. PubMed.

External Citations

  1. P10636-1
  2. P10636-9
  3. P10636-8

Further Reading

Papers

  1. Sobrido MJ, Abu-Khalil A, Weintraub S, Johnson N, Quinn B, Cummings JL, Mesulam MM, Geschwind DH. Possible association of the tau H1/H1 genotype with primary progressive aphasia. Neurology. 2003 Mar 11;60(5):862-4. PubMed.
  2. Stanford PM, Brooks WS, Teber ET, Hallupp M, McLean C, Halliday GM, Martins RN, Kwok JB, Schofield PR. Frequency of tau mutations in familial and sporadic frontotemporal dementia and other tauopathies. J Neurol. 2004 Sep;251(9):1098-104. PubMed.
  3. Rademakers R, Cruts M, van Broeckhoven C. The role of tau (MAPT) in frontotemporal dementia and related tauopathies. Hum Mutat. 2004 Oct;24(4):277-95. PubMed.
  4. Ingelson M, Fabre SF, Lilius L, Andersen C, Viitanen M, Almkvist O, Wahlund LO, Lannfelt L. Increased risk for frontotemporal dementia through interaction between tau polymorphisms and apolipoprotein E epsilon4. Neuroreport. 2001 Apr 17;12(5):905-9. PubMed.

Protein Diagram

Primary Papers

  1. Lilius L, Froelich Fabre S, Basun H, Forsell C, Axelman K, Mattila K, Andreadis A, Viitanen M, Winblad B, Fratiglioni L, Lannfelt L. Tau gene polymorphisms and apolipoprotein E epsilon4 may interact to increase risk for Alzheimer's disease. Neurosci Lett. 1999 Dec 17;277(1):29-32. PubMed.

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