Is ALS2 c.4580+17C>A pathogenic?

ALS2 c.4580+17C>A is classified Likely benign in ALS2 (ClinVar, Single submitter, 1 submitter; last evaluated 2025-10-02). Rare (popmax 0.201%, eas); Associated with infantile-onset ascending hereditary spastic paralysis.

What condition is associated with ALS2 c.4580+17C>A?

ALS2 c.4580+17C>A is associated with infantile-onset ascending hereditary spastic paralysis (ClinVar).

How common is ALS2 c.4580+17C>A in the general population?

ALS2 c.4580+17C>A is rare (popmax 0.201%, eas) (gnomAD).

ALS2 c.4580+17C>A

Q: How is Infantile-onset ascending hereditary spastic paralysis inherited?

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

rs758954201 · VCV2139463

Likely benign Single submitter

Classification

Likely benign

ClinVar

Review

Single submitter ★☆☆☆

ClinVar · 1 submitter

gnomAD v4.1

Rare

rare (popmax 0.201%, eas)

Conditions

infantile-onset ascending hereditary spastic paralysis

Computational evidence

Protein change
Missense predictors do not apply to this variant type; conservation carries the signal.
Splicing
Splice region	donor +17	near-intronic (+17 nt from the splice site)
SpliceAI	—	not assessed · no allele here is in the release
Constraint at this position
Conservation	phyloP -1	GERP -2.9
Overall
CADD	0.179	PHRED · no single calibrated threshold — expert panels disagree

Population frequency

gnomAD v4.1 · exomes + genomes

Grpmax group 0.201% East Asian · 90/44,844 alleles

Filtering AF 0.167% ClinGen BA1/BS1 input FAF95, joint · FAF99 0.155%

Overall 0.00583% 94/1,613,674 alleles · rare

Ancestry group	Frequency	1 in
East Asiangrpmax	0.201%	498
Remaining individualsnot grpmax-eligible	0.0032%	31,244
Admixed American	0.00167%	59,976
European (non-Finnish)	8.48e-05%	1,179,823

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: ALS2
Coding: c.4580+17C>A
MANE Select: NM_020919
dbSNP: rs758954201
Type: single nucleotide variant
Location: chr2:201706829 (GRCh38)
Gene constraint: LOEUF 0.649 · pLI <0.01 · ClinGen HI gene assoc. with recessive phenotype (gnomAD)
Structure: AlphaFold pLDDT 74.69

Full ALS2 gene report on Sugi Atlas → Gene function, pathways, protein structure, interactions & more

Disease context

infantile-onset ascending hereditary spastic paralysis — disease report on Sugi Atlas → Associated genes, phenotypes, clinical trials & treatments

For Infantile-onset ascending hereditary spastic paralysis (Orphanet):

Inheritance: Autosomal recessive
Onset: Infancy, Neonatal

Similar variants

ALS2 c.1640+1G>A Pathogenic/Likely pathogenic ★★ same condition
ALS2 c.2580+2T>C Pathogenic ★★ same condition
ALS2 c.3703-2A>G Pathogenic/Likely pathogenic ★★ same condition
ALS2 p.Ala573Glu Likely pathogenic ★★ same condition
ALS2 p.Arg1139Ter Pathogenic/Likely pathogenic ★★ same condition
ALS2 p.Arg1421Ter Pathogenic/Likely pathogenic ★★ same condition
ALS2 p.Arg1461Ter Pathogenic ★★ same condition
ALS2 p.Arg1510Ter Pathogenic/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/als2-c-4580-plus-17c-a (accessed [today's date]).

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