Is ARSA p.Glu426= (c.1278G>A) pathogenic?

ARSA p.Glu426= (c.1278G>A) is classified Likely benign in ARSA (ClinVar, Single submitter, 1 submitter; last evaluated 2021-06-23). Absent from gnomAD v4.1; Associated with metachromatic leukodystrophy.

What condition is associated with ARSA p.Glu426= (c.1278G>A)?

ARSA p.Glu426= (c.1278G>A) is associated with metachromatic leukodystrophy (ClinVar).

How common is ARSA p.Glu426= (c.1278G>A) in the general population?

ARSA p.Glu426= (c.1278G>A) is absent from gnomAD v4.1 (gnomAD).

How is Metachromatic leukodystrophy inherited?

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

ARSA p.Glu426=

c.1278G>A · rs2146716622 · VCV1667016

Likely benign Single submitter

Classification

Likely benign

ClinVar

Review

Single submitter ★☆☆☆

ClinVar · 1 submitter

gnomAD v4.1

Not reported

no allele count reported in gnomAD v4.1 (AN 1,598,918)

Conditions

metachromatic leukodystrophy

Computational evidence

Protein change
Missense predictors do not apply to this variant type; conservation carries the signal.
Splicing
SpliceAI	—	not assessed · no allele here is in the release
Constraint at this position
Conservation	phyloP -1.4	GERP -4.7
Overall
CADD	8.299	PHRED · no single calibrated threshold — expert panels disagree

Population frequency

gnomAD v4.1 · exomes + genomes

No allele count reported in gnomAD v4.1 (AN 1,598,918). This is missing data, not an absence: the variant may or may not be present in gnomAD. Rarity (ACMG PM2) and BA1/BS1 cannot be assessed for it.

Variant & gene context

Gene: ARSA
Protein: p.Glu426=
Coding: c.1278G>A
MANE Select: NM_000487
dbSNP: rs2146716622
Type: single nucleotide variant
Location: chr22:50625397 (GRCh38)
Gene constraint: LOEUF 1.166 · pLI <0.01 (gnomAD)
Structure: AlphaFold pLDDT 96.43 · 10 PDB
Residue 426: a UniProt-annotated variant site (in mld; juvenile/adult-onset; mild; common mutation; decreased enzyme activity); a β-strand

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

Disease context

metachromatic leukodystrophy — disease report on Sugi Atlas → Associated genes, phenotypes, clinical trials & treatments

For Metachromatic leukodystrophy (Orphanet):

Inheritance: Autosomal recessive
Onset: Adolescent, Adult, Childhood, Infancy
Prevalence: 1-9 / 100 000 (Europe)

Similar variants

ARSA p.Glu426Lys Likely pathogenic ★★ same residue
ARSA p.Glu426Gly Uncertain significance ★ same residue
ARSA p.Glu426fs Pathogenic ★ same residue
ARSA c.1107+1G>A Pathogenic/Likely pathogenic ★★ same condition
ARSA c.1107+1G>T Pathogenic ★★ same condition
ARSA c.1108-2A>G Pathogenic ★★ same condition
ARSA c.1108-3C>G Pathogenic/Likely pathogenic ★★ same condition
ARSA c.1210+1G>A 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/arsa-p-glu426 (accessed [today's date]).

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