Is TTN p.Arg34256= (c.102768G>A) pathogenic?

TTN p.Arg34256= (c.102768G>A) is classified Likely benign in TTN (ClinVar, Single submitter, 1 submitter; last evaluated 2024-01-15). Absent from gnomAD v4.1; Associated with autosomal recessive limb-girdle muscular dystrophy type 2J.

How common is TTN p.Arg34256= (c.102768G>A) in the general population?

TTN p.Arg34256= (c.102768G>A) is absent from gnomAD v4.1 (gnomAD).

How is Titin-related limb-girdle muscular dystrophy R10 inherited?

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

TTN p.Arg34256=

Q: What condition is associated with TTN p.Arg34256= (c.102768G>A)?

TTN p.Arg34256= (c.102768G>A) is associated with autosomal recessive limb-girdle muscular dystrophy type 2J, dilated cardiomyopathy 1G (ClinVar).

c.102768G>A · rs2154135465 · VCV2931115

Likely benign Single submitter

Classification

Likely benign

ClinVar

Review

Single submitter ★☆☆☆

ClinVar · 1 submitter

gnomAD v4.1

Absent

absent from gnomAD v4.1

Conditions

autosomal recessive limb-girdle muscular dystrophy type 2J

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 -0.22	GERP -3.6, phastCons 0.24
Overall
CADD	0.073	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.Arg34256=
Coding: c.102768G>A
MANE Select: NM_001267550
dbSNP: rs2154135465
Type: single nucleotide variant
Location: chr2:178533847 (GRCh38)
Gene constraint: LOEUF 0.479 · pLI <0.01 · ClinGen HI 2/3 (gnomAD)
Residue 34256: a β-strand; the ig-like 152 domain

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

Disease context

autosomal recessive limb-girdle muscular dystrophy type 2J — disease report on Sugi Atlas → Associated genes, phenotypes, clinical trials & treatments

Also linked: dilated cardiomyopathy 1G

For Titin-related limb-girdle muscular dystrophy R10 (Orphanet):

Inheritance: Autosomal recessive
Onset: Adolescent, Adult, Childhood

Similar variants

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
TTN c.107377+1G>C 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-arg34256 (accessed [today's date]).

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