Is NEB p.Ser8255= (c.24765G>A) pathogenic?

NEB p.Ser8255= (c.24765G>A) is classified Likely benign in NEB (ClinVar, Single submitter, 1 submitter; last evaluated 2024-03-18). Very rare (popmax 0.00332%, sas); Associated with nemaline myopathy 2.

What condition is associated with NEB p.Ser8255= (c.24765G>A)?

NEB p.Ser8255= (c.24765G>A) is associated with nemaline myopathy 2 (ClinVar).

How common is NEB p.Ser8255= (c.24765G>A) in the general population?

NEB p.Ser8255= (c.24765G>A) is very rare (popmax 0.00332%, sas) (gnomAD).

How is Severe congenital nemaline myopathy inherited?

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

NEB p.Ser8255=

c.24765G>A · rs749924365 · VCV1990670

Likely benign Single submitter

Classification

Likely benign

ClinVar

Review

Single submitter ★☆☆☆

ClinVar · 1 submitter

gnomAD v4.1

Rare

very rare (popmax 0.00332%, sas)

Conditions

nemaline myopathy 2

Computational evidence

Protein change
Missense predictors do not apply to this variant type; conservation/SpliceAI carries the signal.
REVEL	0.485	indeterminate
Splicing
SpliceAI	Δ0.54	donor loss at this position · masked 0 · deltas
Pangolin	Δ0.43	loss · gain 0.00 · agrees with SpliceAI · independent
Constraint at this position
Conservation	phyloP 7.7	GERP 2.1, phastCons 1
Overall
CADD	21.5	PHRED · no single calibrated threshold — expert panels disagree

Population frequency

gnomAD v4.1 · exomes + genomes

Grpmax group 0.00332% South Asian · 3/90,406 alleles

Filtering AF 0.00111% ClinGen BA1/BS1 input FAF95, joint · FAF99 0.000906%

Overall 0.0015% 24/1,604,560 alleles · very rare exomes 22/1,452,532 · genomes 2/152,028 · joint denominator

Ancestry group	Frequency	1 in
South Asiangrpmax	0.00332%	30,135
European (non-Finnish)	0.00171%	58,619
African / African-American	0.00134%	74,660

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: NEB
Protein: p.Ser8255=
Coding: c.24765G>A
MANE Select: NM_001164508
dbSNP: rs749924365
Type: single nucleotide variant
Location: chr2:151493353 (GRCh38)
Gene constraint: LOEUF 0.597 · pLI <0.01 (gnomAD)
Residue 8255: a UniProt-annotated variant site (in amc6)

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

Disease context

nemaline myopathy 2 — disease report on Sugi Atlas → Associated genes, phenotypes, clinical trials & treatments

For Severe congenital nemaline myopathy (Orphanet):

Inheritance: Autosomal recessive
Onset: Infancy, Neonatal
Prevalence: <1 / 1 000 000 (Europe)

Similar variants

NEB p.Ser8255Leu Uncertain significance ★ ⚠ same residue
NEB c.11910+1G>A Likely pathogenic ★★★ same condition
NEB c.6076-1G>T Likely pathogenic ★★★ same condition
NEB c.78+1G>A Pathogenic ★★★ same condition
NEB p.Arg2313Ter Pathogenic ★★★ same condition
NEB p.Asp498Gly Likely pathogenic ★★★ ⚠ same condition
NEB p.Ser6366Ile Pathogenic ★★★ same condition
NEB p.Ser6648= Pathogenic ★★★ 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/neb-p-ser8255 (accessed [today's date]).

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