Is TTN p.Val522= (c.1566A>C) pathogenic?

TTN p.Val522= (c.1566A>C) is classified Conflicting classifications of pathogenicity in TTN (ClinVar, Conflicting submitters, 2 submitters; last evaluated 2024-10-29). Absent from gnomAD v4.1; Associated with Cardiovascular phenotype.

What condition is associated with TTN p.Val522= (c.1566A>C)?

TTN p.Val522= (c.1566A>C) is associated with Cardiovascular phenotype, dilated cardiomyopathy 1G, autosomal recessive limb-girdle muscular dystrophy type 2J (ClinVar).

How common is TTN p.Val522= (c.1566A>C) in the general population?

TTN p.Val522= (c.1566A>C) is absent from gnomAD v4.1 (gnomAD).

TTN p.Val522=

c.1566A>C · rs2533909416 · VCV1775363

Conflicting classifications of pathogenicity Conflicting submitters

Classification

Conflicting classifications of pathogenicity

ClinVar

Review

Conflicting submitters ★☆☆☆

ClinVar · 2 submitters

gnomAD v4.1

Absent

absent from gnomAD v4.1

Conditions

Cardiovascular phenotype

Computational evidence

Protein change
Missense predictors do not apply to this variant type; conservation/SpliceAI carries the signal.
Splicing
SpliceAI	Δ0.21	acceptor gain · deltas
Constraint at this position
Conservation	phyloP 0.7	GERP 1.1, phastCons 1
Overall
CADD	12.9	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: TTN
Protein: p.Val522=
Coding: c.1566A>C
MANE Select: NM_001267550
dbSNP: rs2533909416
Type: single nucleotide variant
Location: chr2:178792168 (GRCh38)
Gene constraint: LOEUF 0.479 · pLI <0.01 · ClinGen HI 2/3 (gnomAD)

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

Disease context

Cardiovascular phenotype — disease report on Sugi Atlas → Associated genes, phenotypes, clinical trials & treatments

Also linked: dilated cardiomyopathy 1G autosomal recessive limb-girdle muscular dystrophy type 2J

Similar variants

TTN p.Val522Ala Uncertain significance ★ same residue
TTN c.100171+1G>A Likely pathogenic ★★ same condition
TTN c.100766-1G>T Likely pathogenic ★★ same condition
TTN c.100766-2A>T Likely pathogenic ★★ same condition
TTN c.106375-2A>G Pathogenic/Likely pathogenic ★★ same condition
TTN c.106531+1G>A Pathogenic/Likely pathogenic ★★ same condition
TTN c.107224-1G>C Pathogenic/Likely pathogenic ★★ same condition
TTN c.107377+1G>A 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/ttn-p-val522 (accessed [today's date]).

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