Is DSC1 p.Arg63Trp (c.187C>T) pathogenic?

DSC1 p.Arg63Trp (c.187C>T) is classified Uncertain significance in DSC1 (ClinVar, Single submitter, 1 submitter; last evaluated 2025-03-07). AlphaMissense: likely benign (0.0928); Ultra-rare (popmax 0.0231%, sas).

How common is DSC1 p.Arg63Trp (c.187C>T) in the general population?

DSC1 p.Arg63Trp (c.187C>T) is ultra-rare (popmax 0.0231%, sas) (gnomAD).

What do computational predictors say about DSC1 p.Arg63Trp (c.187C>T)?

AlphaMissense predicts likely benign (score 0.0928) — an in-silico prediction, not a clinical call.

DSC1 p.Arg63Trp

c.187C>T · VCV3842510

Uncertain significance Single submitter

Classification

Uncertain significance

ClinVar

Review

Single submitter ★☆☆☆

ClinVar · 1 submitter

AlphaMissense

likely benign

0.0928 · ACMG-weighted

gnomAD v4.1

Rare

ultra-rare (popmax 0.0231%, sas)

Missense predictors

0/3 damaging

AlphaMissense, REVEL, SaProt

Computational evidence

Protein change
AlphaMissense	0.0928	likely benign
REVEL	0.128	moderately benign-leaning
SaProt	LLR -8.87	tolerated
⇒ AlphaMissense, REVEL and SaProt all call this tolerated.
Splicing
SpliceAI	<0.2	all four deltas below 0.2 · G>T here scores Δ0.20 · evaluated, not missing
Constraint at this position
Conservation	phyloP 2.1	GERP -0.74, phastCons 0.78
Regional constraint	o/e 1.04	unconstrained · MANE · 32 kb · p 0.23 · regional, not allelic
Overall
CADD	20.6	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 and SaProt are independent agreement signals.

Population frequency

gnomAD v4.1 · exomes + genomes

Grpmax group 0.0231% South Asian · 21/91,082 alleles

Filtering AF 0.0154% ClinGen BA1/BS1 input FAF95, joint · FAF99 0.0129%

Overall 0.00167% 27/1,614,152 alleles · ultra-rare

Ancestry group	Frequency	1 in
South Asiangrpmax	0.0231%	4,337
African / African-American	0.00133%	75,034
European (non-Finnish)	0.000424%	236,005

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: DSC1
Protein: p.Arg63Trp
Coding: c.187C>T
MANE Select: NM_024421
Type: single nucleotide variant
Location: chr18:31157535 (GRCh38)
Gene constraint: LOEUF 0.951 · pLI <0.01 (gnomAD)
Structure: AlphaFold pLDDT 77.16 · 1 PDB

Full DSC1 gene report on Sugi Atlas → Gene function, pathways, protein structure, interactions & more

Similar variants

DSC1 p.Arg63Gln Uncertain significance ★ ⚠ same residue
DSC1 p.Ile200Thr Benign ★★ ⚠ same type
DSC1 p.Met659Arg Benign ★★ same type
DSC1 p.Thr710= Benign ★★ same type
DSC1 p.Ala128Pro Uncertain significance ★ ⚠ same type
DSC1 p.Ala209Val Uncertain significance ★ ⚠ same type
DSC1 p.Ala221Glu Uncertain significance ★ ⚠ same type
DSC1 p.Ala239Thr Uncertain significance ★ ⚠ same type

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/dsc1-p-arg63trp (accessed [today's date]).

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