DST p.Leu33Ser

Q: Is DST p.Leu33Ser (c.98T>C) pathogenic?

DST p.Leu33Ser (c.98T>C) is classified Benign in DST (ClinVar, Multiple submitters, 3 submitters; last evaluated 2026-02-03). Common (popmax 38.9%, afr) — too common for a highly-penetrant pathogenic allele; Associated with epidermolysis bullosa simplex 3, localized or generalized intermediate, with BP230 deficiency.

Q: What condition is associated with DST p.Leu33Ser (c.98T>C)?

DST p.Leu33Ser (c.98T>C) is associated with epidermolysis bullosa simplex 3, localized or generalized intermediate, with BP230 deficiency, hereditary sensory and autonomic neuropathy type 6 (ClinVar).

Q: How common is DST p.Leu33Ser (c.98T>C) in the general population?

DST p.Leu33Ser (c.98T>C) is common (popmax 38.9%, afr) — too common for a highly-penetrant pathogenic allele (gnomAD).

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.98T>C · rs1024196 · VCV357621

Benign Multiple submitters

Classification

Benign

ClinVar

Review

Multiple submitters ★★☆☆

ClinVar · 3 submitters

gnomAD v4.1

Common

common (popmax 38.9%, afr) — too common for a highly-penetrant pathogenic allele

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	0.144	moderately benign-leaning
Splicing
SpliceAI	<0.2	all four deltas below 0.2 · A>T here scores Δ0.95 · evaluated, not missing
Constraint at this position
Conservation	phyloP 8.7	GERP 2, phastCons 1
Regional constraint	o/e 0.81	unconstrained · MANE · 320 kb · p 2.5e-12 · regional, not allelic
Overall
CADD	17.95	PHRED · no single calibrated threshold — expert panels disagree

Population frequency

gnomAD v4.1 · exomes + genomes

Grpmax group 38.9% African / African-American · 29,144/74,954 alleles

Filtering AF 38.5% ClinGen BA1/BS1 input FAF95, joint · FAF99 38.4%

Overall 5.99% 96,756/1,614,026 alleles · common

Ancestry group	Frequency	1 in
African / African-Americangrpmax	38.9%	3
Remaining individualsnot grpmax-eligible	6.69%	15
Ashkenazi Jewishnot grpmax-eligible	4.85%	21
European (non-Finnish)	4.69%	21
Admixed American	4.6%	22
Middle Eastern	3.41%	29
South Asian	2.38%	42
East Asian	1.56%	64
Finnishnot grpmax-eligible	1.35%	74

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.Leu33Ser
Coding: c.98T>C
MANE Select: NM_001374736 · reported on NM_001723
dbSNP: rs1024196
Type: single nucleotide variant
Location: chr6:56642691 (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

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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-leu33ser (accessed [today's date]).

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