Is TTN p.Pro29323= (c.87969T>C) pathogenic?

TTN p.Pro29323= (c.87969T>C) is classified Likely benign in TTN (ClinVar, Single submitter, 1 submitter; last evaluated 2022-10-04). Absent from gnomAD v4.1; Associated with dilated cardiomyopathy 1G.

What condition is associated with TTN p.Pro29323= (c.87969T>C)?

TTN p.Pro29323= (c.87969T>C) is associated with dilated cardiomyopathy 1G, autosomal recessive limb-girdle muscular dystrophy type 2J (ClinVar).

How common is TTN p.Pro29323= (c.87969T>C) in the general population?

TTN p.Pro29323= (c.87969T>C) is absent from gnomAD v4.1 (gnomAD).

How is Familial isolated dilated cardiomyopathy inherited?

Typically Autosomal dominant, Autosomal recessive (Orphanet). A genetic counselor can assess individual risk for a family.

TTN p.Pro29323=

c.87969T>C · rs2154155527 · VCV2194824

Likely benign Single submitter

Classification

Likely benign

ClinVar

Review

Single submitter ★☆☆☆

ClinVar · 1 submitter

gnomAD v4.1

Absent

absent from gnomAD v4.1

Conditions

dilated cardiomyopathy 1G

Computational evidence

Protein change
Missense predictors do not apply to this variant type; conservation carries the signal.
Splicing
SpliceAI	—	not looked up on this page · why
Constraint at this position
Conservation	phyloP 0.17	GERP -4.7, phastCons 0.84
Overall
CADD	10.56	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.Pro29323=
Coding: c.87969T>C
dbSNP: rs2154155527
Type: single nucleotide variant
Location: chr2:178557293 (GRCh38)

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

Disease context

dilated cardiomyopathy 1G — disease report on Sugi Atlas → Associated genes, phenotypes, clinical trials & treatments

Also linked: autosomal recessive limb-girdle muscular dystrophy type 2J

For Familial isolated dilated cardiomyopathy (Orphanet):

Inheritance: Autosomal dominant, Autosomal recessive, Mitochondrial inheritance
Onset: All ages
Prevalence: 1-9 / 100 000 (Europe)

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-pro29323 (accessed [today's date]).

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