Is DST p.Arg7127Trp (c.21379C>T) pathogenic?

DST p.Arg7127Trp (c.21379C>T) is classified Uncertain significance in DST (ClinVar, Multiple submitters, 2 submitters; last evaluated 2026-01-08). Ultra-rare (popmax 0.07%, amr); Associated with epidermolysis bullosa simplex 3, localized or generalized intermediate, with BP230 deficiency.

How common is DST p.Arg7127Trp (c.21379C>T) in the general population?

DST p.Arg7127Trp (c.21379C>T) is ultra-rare (popmax 0.07%, amr) (gnomAD).

DST p.Arg7127Trp

Q: What condition is associated with DST p.Arg7127Trp (c.21379C>T)?

DST p.Arg7127Trp (c.21379C>T) is associated with epidermolysis bullosa simplex 3, localized or generalized intermediate, with BP230 deficiency, hereditary sensory and autonomic neuropathy type 6 (ClinVar).

Q: How is Epidermolysis bullosa simplex due to BP230 deficiency inherited?

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

c.21379C>T · rs749154692 · VCV1056652

Uncertain significance Multiple submitters

Classification

Uncertain significance

ClinVar

Review

Multiple submitters ★★☆☆

ClinVar · 2 submitters

gnomAD v4.1

Rare

ultra-rare (popmax 0.07%, amr)

Conditions

epidermolysis bullosa simplex 3, localized or generalized intermediate, with BP230 deficiency

Computational evidence

Protein change
Missense predictors do not apply to this variant type; conservation carries the signal.
REVEL	0.412	indeterminate
Splicing
SpliceAI	<0.2	all four deltas below 0.2 · G>T here scores Δ0.68 · evaluated, not missing
Constraint at this position
Conservation	phyloP 5.1	GERP 0.66, phastCons 1
Regional constraint	o/e 0.83	unconstrained · MANE · 46 kb · p 3.7e-11 · regional, not allelic
Overall
CADD	24.7	PHRED · no single calibrated threshold — expert panels disagree

Population frequency

gnomAD v4.1 · exomes + genomes

Grpmax group 0.07% Admixed American · 42/59,976 alleles

Filtering AF 0.0532% ClinGen BA1/BS1 input FAF95, joint · FAF99 0.0473%

Overall 0.00459% 74/1,613,436 alleles · ultra-rare

Ancestry group	Frequency	1 in
Admixed Americangrpmax	0.07%	1,428
European (non-Finnish)	0.00246%	40,679
South Asian	0.0022%	45,506
Remaining individualsnot grpmax-eligible	0.0016%	62,454

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: DST
Protein: p.Arg7127Trp
Coding: c.21379C>T
MANE Select: NM_001374736
dbSNP: rs749154692
Type: single nucleotide variant
Location: chr6:56482706 (GRCh38)
Gene constraint: LOEUF 0.297 · pLI 1.00 (gnomAD)

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

Disease context

epidermolysis bullosa simplex 3, localized or generalized intermediate, with BP230 deficiency — disease report on Sugi Atlas → Associated genes, phenotypes, clinical trials & treatments

Also linked: hereditary sensory and autonomic neuropathy type 6

For Epidermolysis bullosa simplex due to BP230 deficiency (Orphanet):

Inheritance: Autosomal recessive
Onset: Adult

Similar variants

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DST p.Arg22Ter Likely pathogenic ★★ same condition
DST p.Arg7329Ter Pathogenic ★★ same condition
DST p.Cys1828Ter Pathogenic/Likely pathogenic ★★ same condition
DST p.Gln1124Ter Pathogenic/Likely pathogenic ★★ same condition
DST p.Gln1366Ter 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/dst-p-arg7127trp (accessed [today's date]).

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