Pathogenicity: Alzheimer's Disease : Pathogenic
Clinical Phenotype: Alzheimer's Disease
Genomic Mutation Name (MET1): g.44636G>T
Genomic Mutation Name (NT1): g.61242G>T
dbSNP ID: rs63750082
Genomic Region: Exon 7
Mutation Type: Point, Missense
Codon Change: GGT to GTT
This mutation has been reported in the proband of a family with multi-generational early-onset Alzheimer’s disease. The reported pedigree shows four affected individuals over three generations. The proband, “EN”, developed disorientation at age 30 with insidious onset of memory impairment. He died at age 39 with a diagnosis of AD. His mother died of autopsy-confirmed AD at age 42 with onset in her early thirties. Her first symptoms were confusion, handwriting changes, word-finding problems, short-term memory loss, and anger. She later developed severe loss of language and motor skills, disorientation, seizures and blindness. The proband’s maternal grandfather died of an unspecified dementia in his early forties. The G206V mutation was hypothesized to be pathogenic, but confirmation was not possible in this family as the other affected family members were predeceased (Goldman et al., 2002).
Unknown. MRI of the proband showed mild atrophy of the brain with normal temporal lobes.
- Goldman JS, Reed B, Gearhart R, Kramer JH, Miller BL. Very early-onset familial Alzheimer's disease: a novel presenilin 1 mutation. Int J Geriatr Psychiatry. 2002 Jul;17(7):649-51. PubMed.