Is TMC8 p.Thr483= (c.1449G>A) pathogenic?

TMC8 p.Thr483= (c.1449G>A) is classified Likely benign in TMC8 (ClinVar, Single submitter, 1 submitter; last evaluated 2025-10-01). Very rare (popmax 0.00666%, amr); Associated with epidermodysplasia verruciformis.

What condition is associated with TMC8 p.Thr483= (c.1449G>A)?

TMC8 p.Thr483= (c.1449G>A) is associated with epidermodysplasia verruciformis (ClinVar).

How common is TMC8 p.Thr483= (c.1449G>A) in the general population?

TMC8 p.Thr483= (c.1449G>A) is very rare (popmax 0.00666%, amr) (gnomAD).

How is Inherited epidermodysplasia verruciformis inherited?

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

TMC8 p.Thr483=

c.1449G>A · rs762149608 · VCV2167502

Likely benign Single submitter

Classification

Likely benign

ClinVar

Review

Single submitter ★☆☆☆

ClinVar · 1 submitter

gnomAD v4.1

Rare

very rare (popmax 0.00666%, amr)

Conditions

epidermodysplasia verruciformis

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 -10	GERP -3.4
Overall
CADD	0.418	PHRED · no single calibrated threshold — expert panels disagree

Population frequency

gnomAD v4.1 · exomes + genomes

Grpmax group 0.00666% Admixed American · 4/60,024 alleles

Filtering AF 0.00225% ClinGen BA1/BS1 input FAF95, joint · FAF99 0.00135%

Overall 0.00105% 17/1,613,966 alleles · very rare exomes 17/1,461,706 · genomes 0/152,260 · joint denominator

Ancestry group	Frequency	1 in
Admixed Americangrpmax	0.00666%	15,006
Ashkenazi Jewishnot grpmax-eligible	0.00338%	29,606
Remaining individualsnot grpmax-eligible	0.0016%	62,502
European (non-Finnish)	0.000932%	107,273

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: TMC8
Protein: p.Thr483=
Coding: c.1449G>A
MANE Select: NM_152468
dbSNP: rs762149608
Type: single nucleotide variant
Location: chr17:78138104 (GRCh38)
Gene constraint: LOEUF 1.201 · pLI <0.01 · ClinGen HI gene assoc. with recessive phenotype (gnomAD)
Structure: AlphaFold pLDDT 76.77
Residue 483: the 'tmc domain' region; a UniProt-annotated variant site (in ev2)

Full TMC8 gene report on Sugi Atlas → Gene function, pathways, protein structure, interactions & more

Disease context

epidermodysplasia verruciformis — disease report on Sugi Atlas → Associated genes, phenotypes, clinical trials & treatments

For Inherited epidermodysplasia verruciformis (Orphanet):

Inheritance: Autosomal recessive
Onset: All ages

Similar variants

TMC8 p.Thr483Met Uncertain significance ★★ ⚠ same residue
TMC8 c.1824-1G>C Pathogenic/Likely pathogenic ★★ same condition
TMC8 c.449-1G>T Likely pathogenic ★★ same condition
TMC8 p.Arg190Ter Pathogenic ★★ same condition
TMC8 p.Ala188Val Uncertain significance ★★ ⚠ same condition
TMC8 p.Ala290Thr Uncertain significance ★★ ⚠ same condition
TMC8 p.Ala313Val Uncertain significance ★★ ⚠ same condition
TMC8 p.Ala316Thr Uncertain significance ★★ ⚠ 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/tmc8-p-thr483 (accessed [today's date]).

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