Is SUN2 p.Ala603Thr (c.1807G>A) pathogenic?

SUN2 p.Ala603Thr (c.1807G>A) is classified Uncertain significance in SUN2 (ClinVar, Single submitter, 1 submitter; last evaluated 2022-07-19). AlphaMissense: likely pathogenic (0.964); Very rare (popmax 8.47e-05%, nfe); Associated with Emery-Dreifuss muscular dystrophy.

What condition is associated with SUN2 p.Ala603Thr (c.1807G>A)?

SUN2 p.Ala603Thr (c.1807G>A) is associated with Emery-Dreifuss muscular dystrophy (ClinVar).

How common is SUN2 p.Ala603Thr (c.1807G>A) in the general population?

SUN2 p.Ala603Thr (c.1807G>A) is very rare (popmax 8.47e-05%, nfe) (gnomAD).

How is Emery-Dreifuss muscular dystrophy inherited?

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

What do computational predictors say about SUN2 p.Ala603Thr (c.1807G>A)?

AlphaMissense predicts likely pathogenic (score 0.964) — an in-silico prediction, not a clinical call.

SUN2 p.Ala603Thr

c.1807G>A · rs1384723835 · VCV1060243

Uncertain significance Single submitter

Classification

Uncertain significance

ClinVar

Review

Single submitter ★☆☆☆

ClinVar · 1 submitter

AlphaMissense

likely pathogenic

0.964 · ACMG-weighted

gnomAD v4.1

Rare

very rare (popmax 8.47e-05%, nfe)

Missense predictors

2/2 damaging

AlphaMissense, SaProt · REVEL indeterminate

Conditions

Emery-Dreifuss muscular dystrophy

⚠ Built without this gene's context — gene constraint and dosage, protein structure, pathways, panels and related-variant links were not looked up for this page. why

Computational evidence

Protein change
AlphaMissense	0.964	likely pathogenic
REVEL	0.429	indeterminate
SaProt	LLR -12.28	damaging
⇒ AlphaMissense and SaProt both call this damaging; REVEL is indeterminate.
Splicing
SpliceAI	—	not looked up on this page · why
Constraint at this position
Conservation	phyloP 5.9	GERP 1.4, phastCons 1
Regional constraint	o/e 0.70	unconstrained · MANE · 2,037 bp · p 3.5e-07 · regional, not allelic
Overall
CADD	29.8	PHRED · no single calibrated threshold — expert panels disagree

ClinVar classifies this uncertain; the computational predictors unanimously lean damaging — 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 8.47e-05% European (non-Finnish) · 1/1,179,966 alleles

Overall 6.2e-05% 1/1,613,578 alleles · very rare exomes 1/1,461,274 · genomes 0/152,304 · joint denominator

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: SUN2
Protein: p.Ala603Thr
Coding: c.1807G>A
MANE Select: NM_015374
dbSNP: rs1384723835
Type: single nucleotide variant
Location: chr22:38738727 (GRCh38)

Full SUN2 gene report on Sugi Atlas → Gene function, pathways, protein structure, interactions & more

Disease context

Emery-Dreifuss muscular dystrophy — disease report on Sugi Atlas → Associated genes, phenotypes, clinical trials & treatments

For Emery-Dreifuss muscular dystrophy (Orphanet):

Inheritance: Autosomal dominant, Autosomal recessive, X-linked recessive
Onset: Childhood
Prevalence: 1-9 / 1 000 000 (Europe)

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/sun2-p-ala603thr (accessed [today's date]).

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