Is TTN p.Leu33859Val (c.101575T>G) pathogenic?

TTN p.Leu33859Val (c.101575T>G) is classified Uncertain significance in TTN (ClinVar, Single submitter, 1 submitter; last evaluated 2026-01-26). AlphaMissense: likely benign (0.2263); Absent from gnomAD v4.1; Associated with autosomal recessive limb-girdle muscular dystrophy type 2J.

How common is TTN p.Leu33859Val (c.101575T>G) in the general population?

TTN p.Leu33859Val (c.101575T>G) 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.

What do computational predictors say about TTN p.Leu33859Val (c.101575T>G)?

AlphaMissense predicts likely benign (score 0.2263) — an in-silico prediction, not a clinical call.

TTN p.Leu33859Val

Q: What condition is associated with TTN p.Leu33859Val (c.101575T>G)?

TTN p.Leu33859Val (c.101575T>G) is associated with autosomal recessive limb-girdle muscular dystrophy type 2J, dilated cardiomyopathy 1G (ClinVar).

c.101575T>G · VCV4787352

Uncertain significance Single submitter

Classification

Uncertain significance

ClinVar

Review

Single submitter ★☆☆☆

ClinVar · 1 submitter

AlphaMissense

likely benign

0.2263 · ACMG-weighted

gnomAD v4.1

Absent

absent from gnomAD v4.1

Missense predictors

0/2 damaging

AlphaMissense, REVEL · SaProt no call

Conditions

autosomal recessive limb-girdle muscular dystrophy type 2J

Computational evidence

Protein change
AlphaMissense	0.2263	likely benign
REVEL	0.178	moderately benign-leaning
SaProt	—	not scored · why
⇒ AlphaMissense and REVEL both call this tolerated; SaProt makes no call.
Splicing
SpliceAI	—	not assessed · no allele here is in the release
Constraint at this position
Conservation	phyloP 4.2	GERP 1.8, phastCons 1
Regional constraint	o/e 0.93	unconstrained · MANE · 75 kb · p 3.1e-23 · regional, not allelic
Overall
CADD	14.65	PHRED · no single calibrated threshold — expert panels disagree

ClinVar classifies this uncertain; the computational predictors unanimously lean tolerated — a triage signal, not a reclassification

AlphaMissense carries the ACMG weight for missense; REVEL is an independent agreement signal.

⚠ Isoform check: AlphaMissense numbered on a different transcript (AM L32218V vs ClinVar L33859V) — verify the residue.

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.Leu33859Val
Coding: c.101575T>G
MANE Select: NM_001267550
Type: single nucleotide variant
Location: chr2:178535040 (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

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 p.Leu33859Trp 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-leu33859val (accessed [today's date]).

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