Is SUN2 p.Glu627Gln (c.1879G>C) pathogenic?

SUN2 p.Glu627Gln (c.1879G>C) is classified Uncertain significance in SUN2 (ClinVar, Single submitter, 1 submitter; last evaluated 2020-10-08). AlphaMissense: likely pathogenic (0.6654); Ultra-rare (popmax 0.0165%, mid); Associated with Emery-Dreifuss muscular dystrophy.

What condition is associated with SUN2 p.Glu627Gln (c.1879G>C)?

SUN2 p.Glu627Gln (c.1879G>C) is associated with Emery-Dreifuss muscular dystrophy (ClinVar).

How common is SUN2 p.Glu627Gln (c.1879G>C) in the general population?

SUN2 p.Glu627Gln (c.1879G>C) is ultra-rare (popmax 0.0165%, mid) (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.Glu627Gln (c.1879G>C)?

AlphaMissense predicts likely pathogenic (score 0.6654) — an in-silico prediction, not a clinical call.

SUN2 p.Glu627Gln

c.1879G>C · rs769627673 · VCV1039147

Uncertain significance Single submitter

Classification

Uncertain significance

ClinVar

Review

Single submitter ★☆☆☆

ClinVar · 1 submitter

AlphaMissense

likely pathogenic

0.6654 · ACMG-weighted

gnomAD v4.1

Rare

ultra-rare (popmax 0.0165%, mid)

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	0.6654	likely pathogenic
REVEL	0.381	indeterminate
SaProt	LLR -10.77	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 7.6	GERP 2.5, phastCons 1
Regional constraint	o/e 0.70	unconstrained · MANE · 2,037 bp · p 3.5e-07 · regional, not allelic
Overall
CADD	28.5	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 0.0165% Middle Eastern · 1/6,062 alleles

Filtering AF 0.00676% ClinGen BA1/BS1 input FAF95, joint · FAF99 0.00522%

Overall 0.000867% 14/1,614,040 alleles · ultra-rare exomes 14/1,461,690 · genomes 0/152,350 · joint denominator

Ancestry group	Frequency	1 in
Middle Easterngrpmax	0.0165%	6,062
South Asian	0.0121%	8,281
European (non-Finnish)	0.000169%	590,016

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.Glu627Gln
Coding: c.1879G>C
MANE Select: NM_015374
dbSNP: rs769627673
Type: single nucleotide variant
Location: chr22:38738655 (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-glu627gln (accessed [today's date]).

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