Is TH p.Pro88fs (c.263del) pathogenic?

TH p.Pro88fs (c.263del) is classified Pathogenic in TH (ClinVar, Single submitter, 1 submitter; last evaluated 2022-03-01). No gnomAD frequency available for this variant; Associated with TH-deficient dopa-responsive dystonia.

What condition is associated with TH p.Pro88fs (c.263del)?

TH p.Pro88fs (c.263del) is associated with TH-deficient dopa-responsive dystonia (ClinVar).

How common is TH p.Pro88fs (c.263del) in the general population?

TH p.Pro88fs (c.263del) is no gnomAD frequency available for this variant (gnomAD).

How is Autosomal recessive dopa-responsive dystonia inherited?

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

TH p.Pro88fs

c.263del · rs2495829167 · VCV2105184

Pathogenic Single submitter

Classification

Pathogenic

ClinVar

Review

Single submitter ★☆☆☆

ClinVar · 1 submitter

Consequence

frameshift

predicted LoF

gnomAD v4.1

Not reported

no gnomAD frequency available for this variant

Conditions

TH-deficient dopa-responsive dystonia

Computational evidence

Protein change
Missense predictors do not apply to this variant type; conservation carries the signal.
Consequence	frameshift	predicted loss-of-function
NMD	predicted	premature termination codon in exon 2 of 13
Splicing
SpliceAI	—	not assessed · substitutions only
Constraint at this position
Conservation	phyloP 0.2	GERP -0.51, phastCons 0.02

Predicted loss-of-function is descriptive, not an applied PVS1 code.

Population frequency

dbSNP / gnomAD

No gnomAD frequency available for this variant. This is missing data, not an absence: the variant may or may not be present in gnomAD. Rarity (ACMG PM2) and BA1/BS1 cannot be assessed for it.

Variant & gene context

Gene: TH
Protein: p.Pro88fs
Coding: c.263del
MANE Select: NM_000360
dbSNP: rs2495829167
Type: Deletion
Location: chr11:2169699 (GRCh38)
Gene constraint: LOEUF 1.27 · pLI <0.01 (gnomAD)
Structure: AlphaFold pLDDT 81.75 · 7 PDB

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

Disease context

TH-deficient dopa-responsive dystonia — disease report on Sugi Atlas → Associated genes, phenotypes, clinical trials & treatments

For Autosomal recessive dopa-responsive dystonia (Orphanet):

Inheritance: Autosomal recessive
Onset: Infancy, Neonatal

Similar variants

TH p.Pro88Leu Conflicting classifications of pathogenicity ★ ⚠ same residue
TH p.Pro88= Benign ★ same residue
TH p.Gln346fs Pathogenic/Likely pathogenic ★★ same condition
TH p.Glu375fs Pathogenic/Likely pathogenic ★★ same condition
TH p.His335fs Likely pathogenic ★★ same condition
TH p.Ser195fs Pathogenic/Likely pathogenic ★★ same condition
TH p.Ser404fs Pathogenic/Likely pathogenic ★★ same condition
TH p.Thr238fs 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/th-p-pro88fs (accessed [today's date]).

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