Is DSG4 p.Val677Ala (c.2030T>C) pathogenic?

DSG4 p.Val677Ala (c.2030T>C) is classified Uncertain significance in DSG4 (ClinVar, Single submitter, 1 submitter; last evaluated 2023-02-22). AlphaMissense: likely benign (0.129); Ultra-rare (popmax 0.0657%, mid); Associated with Inborn genetic diseases.

What condition is associated with DSG4 p.Val677Ala (c.2030T>C)?

DSG4 p.Val677Ala (c.2030T>C) is associated with Inborn genetic diseases (ClinVar).

How common is DSG4 p.Val677Ala (c.2030T>C) in the general population?

DSG4 p.Val677Ala (c.2030T>C) is ultra-rare (popmax 0.0657%, mid) (gnomAD).

What do computational predictors say about DSG4 p.Val677Ala (c.2030T>C)?

AlphaMissense predicts likely benign (score 0.129) — an in-silico prediction, not a clinical call.

DSG4 p.Val677Ala

c.2030T>C · rs1271561539 · VCV2487724

Uncertain significance Single submitter

Classification

Uncertain significance

ClinVar

Review

Single submitter ★☆☆☆

ClinVar · 1 submitter

AlphaMissense

likely benign

0.129 · ACMG-weighted

gnomAD v4.1

Rare

ultra-rare (popmax 0.0657%, mid)

Missense predictors

0/3 damaging

AlphaMissense, REVEL, SaProt

Conditions

Inborn genetic diseases

Computational evidence

Protein change
AlphaMissense	0.129	likely benign
REVEL	0.052	moderately benign-leaning
SaProt	LLR -6.11	tolerated
⇒ AlphaMissense, REVEL and SaProt all call this tolerated.
Splicing
SpliceAI	—	not looked up on this page · why
Constraint at this position
Conservation	phyloP 2.4	GERP -0.53, phastCons 1
Regional constraint	o/e 1.07	unconstrained · MANE · 37 kb · p 0.015 · regional, not allelic
Overall
CADD	16.1	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 0.0657% Middle Eastern · 4/6,084 alleles

Filtering AF 0.0224% ClinGen BA1/BS1 input FAF95, joint · FAF99 0.0135%

Overall 0.00124% 20/1,613,606 alleles · ultra-rare

Ancestry group	Frequency	1 in
Middle Easterngrpmax	0.0657%	1,521
Remaining individualsnot grpmax-eligible	0.0048%	20,827
South Asian	0.0022%	45,528
European (non-Finnish)	0.000932%	107,267

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: DSG4
Protein: p.Val677Ala
Coding: c.2030T>C
dbSNP: rs1271561539
Type: single nucleotide variant
Location: chr18:31409548 (GRCh38)

Full DSG4 gene report on Sugi Atlas → Gene function, pathways, protein structure, interactions & more

Disease context

Inborn genetic diseases — disease report on Sugi Atlas → Associated genes, phenotypes, clinical trials & treatments

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/dsg4-p-val677ala (accessed [today's date]).

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