Is MEGF10 p.Pro1108Ser (c.3322C>T) pathogenic?

MEGF10 p.Pro1108Ser (c.3322C>T) is classified Uncertain significance in MEGF10 (ClinVar, Single submitter, 1 submitter; last evaluated 2025-12-15). AlphaMissense: likely benign (0.3223); Very rare (popmax 0.0011%, sas); Associated with MEGF10-related myopathy.

What condition is associated with MEGF10 p.Pro1108Ser (c.3322C>T)?

MEGF10 p.Pro1108Ser (c.3322C>T) is associated with MEGF10-related myopathy (ClinVar).

How common is MEGF10 p.Pro1108Ser (c.3322C>T) in the general population?

MEGF10 p.Pro1108Ser (c.3322C>T) is very rare (popmax 0.0011%, sas) (gnomAD).

What do computational predictors say about MEGF10 p.Pro1108Ser (c.3322C>T)?

AlphaMissense predicts likely benign (score 0.3223) — an in-silico prediction, not a clinical call.

MEGF10 p.Pro1108Ser

Q: How is Early-onset myopathy-areflexia-respiratory distress-dysphagia syndrome inherited?

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

c.3322C>T · rs199899433 · VCV2149117

Uncertain significance Single submitter

Classification

Uncertain significance

ClinVar

Review

Single submitter ★☆☆☆

ClinVar · 1 submitter

AlphaMissense

likely benign

0.3223 · ACMG-weighted

gnomAD v4.1

Rare

very rare (popmax 0.0011%, sas)

Missense predictors

1/3 damaging

AlphaMissense, REVEL, SaProt

Conditions

MEGF10-related myopathy

Computational evidence

Protein change
AlphaMissense	0.3223	likely benign
REVEL	0.719	pathogenic-leaning
SaProt	LLR -5.61	tolerated
⇒ REVEL calls this damaging; AlphaMissense and SaProt do not.
Splicing
SpliceAI	—	not assessed · no allele here is in the release
Constraint at this position
Conservation	phyloP 7.7	GERP 1.9, phastCons 1
Regional constraint	o/e 0.91	unconstrained · MANE · 12 kb · p 0.073 · regional, not allelic
Overall
CADD	25.6	PHRED · no single calibrated threshold — expert panels disagree

AlphaMissense carries the ACMG weight for missense; REVEL and SaProt are independent agreement signals.

Population frequency

gnomAD v4.1 · exomes + genomes

Grpmax group 0.0011% South Asian · 1/91,084 alleles

Overall 6.2e-05% 1/1,614,142 alleles · very rare exomes 1/1,461,860 · genomes 0/152,282 · 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: MEGF10
Protein: p.Pro1108Ser
Coding: c.3322C>T
MANE Select: NM_001256545
dbSNP: rs199899433
Type: single nucleotide variant
Location: chr5:127457217 (GRCh38)
Gene constraint: LOEUF 0.707 · pLI <0.01 (gnomAD)
Structure: AlphaFold pLDDT 70.73
Residue 1108: the 'necessary for formation of large intracellular vacuoles' region

Full MEGF10 gene report on Sugi Atlas → Gene function, pathways, protein structure, interactions & more

Disease context

MEGF10-related myopathy — disease report on Sugi Atlas → Associated genes, phenotypes, clinical trials & treatments

For Early-onset myopathy-areflexia-respiratory distress-dysphagia syndrome (Orphanet):

Inheritance: Autosomal recessive
Onset: Infancy, Neonatal

Similar variants

MEGF10 c.2104+1G>T Likely pathogenic ★★ same condition
MEGF10 p.Cys774Arg Pathogenic/Likely pathogenic ★★ same condition
MEGF10 p.Glu398Ter Pathogenic/Likely pathogenic ★★ same condition
MEGF10 c.1426+5G>T Uncertain significance ★★ same condition
MEGF10 c.*1170G>A Uncertain significance ★★ same condition
MEGF10 p.Ala171Thr Uncertain significance ★★ ⚠ same condition
MEGF10 p.Ala171Val Uncertain significance ★★ ⚠ same condition
MEGF10 p.Ala219Val Uncertain significance ★★ ⚠ 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/megf10-p-pro1108ser (accessed [today's date]).

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