Is TTN p.Pro34864= (c.104592G>A) pathogenic?

TTN p.Pro34864= (c.104592G>A) is classified Benign/Likely benign in TTN (ClinVar, Multiple submitters, 11 submitters; last evaluated 2026-01-27). Rare (popmax 0.185%, afr); Associated with Cardiovascular phenotype.

What condition is associated with TTN p.Pro34864= (c.104592G>A)?

TTN p.Pro34864= (c.104592G>A) is associated with Cardiovascular phenotype, tibial muscular dystrophy, myopathy, myofibrillar, 9, with early respiratory failure (ClinVar).

How common is TTN p.Pro34864= (c.104592G>A) in the general population?

TTN p.Pro34864= (c.104592G>A) is rare (popmax 0.185%, afr) (gnomAD).

TTN p.Pro34864=

c.104592G>A · rs144094650 · VCV178154

Benign/Likely benign Multiple submitters

Classification

Benign/Likely benign

ClinVar

Review

Multiple submitters ★★☆☆

ClinVar · 11 submitters

gnomAD v4.1

Rare

rare (popmax 0.185%, afr)

Conditions

Cardiovascular phenotype

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 -11	GERP -5.4
Overall
CADD	0.003	PHRED · no single calibrated threshold — expert panels disagree

Population frequency

gnomAD v4.1 · exomes + genomes

Grpmax group 0.185% African / African-American · 139/74,992 alleles

Filtering AF 0.16% ClinGen BA1/BS1 input FAF95, joint · FAF99 0.151%

Overall 0.011% 178/1,613,828 alleles · rare exomes 111/1,461,630 · genomes 67/152,198 · joint denominator

Ancestry group	Frequency	1 in
African / African-Americangrpmax	0.185%	540
Middle Eastern	0.0165%	6,060
Admixed American	0.0117%	8,573
South Asian	0.00659%	15,179
Remaining individualsnot grpmax-eligible	0.0064%	15,620
East Asian	0.00223%	44,860
European (non-Finnish)	0.00161%	62,098
Finnishnot grpmax-eligible	0.00156%	63,982

Rarity supports pathogenicity (ACMG PM2); frequency above a disease-specific BA1/BS1 threshold argues against it. A variant frequent in one ancestry group can be near-absent in others, so a single global figure can mislead.

Variant & gene context

Gene: TTN
Protein: p.Pro34864=
Coding: c.104592G>A
MANE Select: NM_001267550
dbSNP: rs144094650
Type: single nucleotide variant
Location: chr2:178532023 (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: tibial muscular dystrophy myopathy, myofibrillar, 9, with early respiratory failure dilated cardiomyopathy 1G autosomal recessive limb-girdle muscular dystrophy type 2J early-onset myopathy with fatal cardiomyopathy

Similar variants

TTN p.Pro34864Leu Conflicting classifications of pathogenicity ★ ⚠ 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-pro34864 (accessed [today's date]).

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