Is ARSA p.Leu113Pro (c.338T>C) pathogenic?

ARSA p.Leu113Pro (c.338T>C) is classified Pathogenic/Likely pathogenic in ARSA (ClinVar, Multiple submitters, 5 submitters; last evaluated 2026-01-15). Very rare (popmax 0.00565%, sas); Associated with metachromatic leukodystrophy.

What condition is associated with ARSA p.Leu113Pro (c.338T>C)?

ARSA p.Leu113Pro (c.338T>C) is associated with metachromatic leukodystrophy (ClinVar).

How common is ARSA p.Leu113Pro (c.338T>C) in the general population?

ARSA p.Leu113Pro (c.338T>C) is very rare (popmax 0.00565%, sas) (gnomAD).

How is Metachromatic leukodystrophy inherited?

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

ARSA p.Leu113Pro

c.338T>C · rs777431148 · VCV1066073

Pathogenic/Likely pathogenic Multiple submitters

Classification

Pathogenic/Likely pathogenic

ClinVar

Review

Multiple submitters ★★☆☆

ClinVar · 5 submitters

gnomAD v4.1

Rare

very rare (popmax 0.00565%, sas)

Conditions

metachromatic leukodystrophy

Computational evidence

Protein change
Missense predictors do not apply to this variant type; conservation carries the signal.
REVEL	0.987	strongly pathogenic-leaning
Splicing
SpliceAI	—	not assessed · no allele here is in the release
Constraint at this position
Conservation	phyloP 11	GERP 2, phastCons 1
Regional constraint	o/e 1.00	unconstrained · MANE · 2,631 bp · p 0.96 · regional, not allelic
Overall
CADD	27.7	PHRED · no single calibrated threshold — expert panels disagree

Population frequency

gnomAD v4.1 · exomes + genomes

Grpmax group 0.00565% South Asian · 5/88,548 alleles

Filtering AF 0.00215% ClinGen BA1/BS1 input FAF95, joint · FAF99 0.0014%

Overall 0.000314% 5/1,589,840 alleles · very rare

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: ARSA
Protein: p.Leu113Pro
Coding: c.338T>C
MANE Select: NM_000487
dbSNP: rs777431148
Type: single nucleotide variant
Location: chr22:50627293 (GRCh38)
Gene constraint: LOEUF 1.166 · pLI <0.01 (gnomAD)
Structure: AlphaFold pLDDT 96.43 · 10 PDB
Residue 113: a turn

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.Leu113= Likely benign ★ 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
ARSA c.224+1G>A Likely pathogenic ★★ same condition
ARSA c.225-1G>C Likely 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-leu113pro (accessed [today's date]).

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