Is MAPT p.Ala776= (c.2328C>T) pathogenic?

MAPT p.Ala776= (c.2328C>T) is classified Likely benign in MAPT (ClinVar, Single submitter, 1 submitter; last evaluated 2025-06-11). Absent from gnomAD v4.1; Associated with frontotemporal dementia.

What condition is associated with MAPT p.Ala776= (c.2328C>T)?

MAPT p.Ala776= (c.2328C>T) is associated with frontotemporal dementia (ClinVar).

How common is MAPT p.Ala776= (c.2328C>T) in the general population?

MAPT p.Ala776= (c.2328C>T) is absent from gnomAD v4.1 (gnomAD).

MAPT p.Ala776=

c.2328C>T · rs2146223739 · VCV2085966

Likely benign Single submitter

Classification

Likely benign

ClinVar

Review

Single submitter ★☆☆☆

ClinVar · 1 submitter

gnomAD v4.1

Absent

absent from gnomAD v4.1

Conditions

frontotemporal dementia

Computational evidence

Protein change
Missense predictors do not apply to this variant type; conservation carries the signal.
Splicing
SpliceAI	—	not assessed · no allele here is in the release
Constraint at this position
Conservation	phyloP 4.9	GERP 7.2, phastCons 1
Overall
CADD	15.01	PHRED · no single calibrated threshold — expert panels disagree

Population frequency

gnomAD v4.1 · exomes + genomes

Absent from gnomAD v4.1. Not observed in any sequenced alleles — a rarity signal (ACMG PM2-supporting), not evidence of pathogenicity on its own.

Variant & gene context

Gene: MAPT
Protein: p.Ala776=
Coding: c.2328C>T
MANE Select: NM_001377265
dbSNP: rs2146223739
Type: single nucleotide variant
Location: chr17:46023997 (GRCh38)
Gene constraint: LOEUF 0.723 · pLI <0.01 · ClinGen HI 0/3 (gnomAD)
Structure: AlphaFold pLDDT 49.56 · 299 PDB

Full MAPT gene report on Sugi Atlas → Gene function, pathways, protein structure, interactions & more

Disease context

frontotemporal dementia — disease report on Sugi Atlas → Associated genes, phenotypes, clinical trials & treatments

Similar variants

MAPT c.1999-10G>T Pathogenic ★★ same condition
MAPT c.2091+16C>T Pathogenic ★★ same condition
MAPT c.2091+3G>A Pathogenic ★★ same condition
MAPT p.Arg798Trp Pathogenic ★★ ⚠ same condition
MAPT p.Asn671Lys Pathogenic ★★ ⚠ same condition
MAPT p.Asn688= Pathogenic ★★ same condition
MAPT p.Gln728His Pathogenic/Likely pathogenic ★★ ⚠ same condition
MAPT p.Gly727Ser Pathogenic/Likely pathogenic ★★ same condition

Built on 18 open, versioned datasets — ClinVar, gnomAD, AlphaMissense, REVEL, ClinGen & more — plus Sugi Variant's own cross-source analysis. Source data 2026-01–2026-10, ClinVar 2026-10. Full sources & versions →

Cite Sugi Variant

Gür T. Sugi Variant: A Deterministic Per-Variant Germline Reference from a Knowledge Graph for Humans and AI Agents. 2026. doi:10.5281/zenodo.21509445. This variant: https://sugi.bio/variant/mapt-p-ala776 (accessed [today's date]).

Preprint & method: sugi.bio/variant/method Machine-readable: this page as Markdown