Is SETX p.Arg1845= (c.5535C>T) pathogenic?

SETX p.Arg1845= (c.5535C>T) is classified Benign/Likely benign in SETX (ClinVar, Multiple submitters, 5 submitters; last evaluated 2023-02-08). Very rare (popmax 0.0028%, nfe); Associated with spinocerebellar ataxia, autosomal recessive, with axonal neuropathy 2.

How common is SETX p.Arg1845= (c.5535C>T) in the general population?

SETX p.Arg1845= (c.5535C>T) is very rare (popmax 0.0028%, nfe) (gnomAD).

SETX p.Arg1845=

Q: What condition is associated with SETX p.Arg1845= (c.5535C>T)?

SETX p.Arg1845= (c.5535C>T) is associated with spinocerebellar ataxia, autosomal recessive, with axonal neuropathy 2, amyotrophic lateral sclerosis type 4 (ClinVar).

Q: How is Spinocerebellar ataxia with axonal neuropathy type 2 inherited?

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

c.5535C>T · rs200433173 · VCV805423

Benign/Likely benign Multiple submitters

Classification

Benign/Likely benign

ClinVar

Review

Multiple submitters ★★☆☆

ClinVar · 5 submitters

gnomAD v4.1

Rare

very rare (popmax 0.0028%, nfe)

Conditions

spinocerebellar ataxia, autosomal recessive, with axonal neuropathy 2

Computational evidence

Protein change
Missense predictors do not apply to this variant type; conservation carries the signal.
Splicing
SpliceAI	<0.2	no splice effect predicted · four deltas, not one · how we know
Constraint at this position
Conservation	phyloP 0.17	GERP -3, phastCons 0.88
Overall
CADD	4.346	PHRED · no single calibrated threshold — expert panels disagree

Population frequency

gnomAD v4.1 · exomes + genomes

Grpmax group 0.0028% European (non-Finnish) · 33/1,179,874 alleles

Filtering AF 0.002% ClinGen BA1/BS1 input FAF95, joint · FAF99 0.00176%

Overall 0.00242% 39/1,613,614 alleles · very rare exomes 35/1,461,356 · genomes 4/152,258 · joint denominator

Ancestry group	Frequency	1 in
Remaining individualsnot grpmax-eligible	0.0048%	20,827
Ashkenazi Jewishnot grpmax-eligible	0.00338%	29,588
European (non-Finnish)grpmax	0.0028%	35,754
Admixed American	0.00167%	60,012
African / African-American	0.00133%	75,018

Remaining individuals shows a higher raw frequency than the grpmax group above it. gnomAD excludes bottlenecked groups — Finnish, Ashkenazi Jewish, Amish and “Remaining individuals” — from grpmax, because founder effects make their frequencies unrepresentative for filtering. The table is sorted by frequency, so an excluded group can sit above the grpmax row.

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: SETX
Protein: p.Arg1845=
Coding: c.5535C>T
MANE Select: NM_015046
dbSNP: rs200433173
Type: single nucleotide variant
Location: chr9:132300643 (GRCh38)
Gene constraint: LOEUF 0.442 · pLI 1.00 (gnomAD)
Structure: AlphaFold pLDDT 52.93

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

Disease context

spinocerebellar ataxia, autosomal recessive, with axonal neuropathy 2 — disease report on Sugi Atlas → Associated genes, phenotypes, clinical trials & treatments

Also linked: amyotrophic lateral sclerosis type 4

For Spinocerebellar ataxia with axonal neuropathy type 2 (Orphanet):

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

Similar variants

SETX p.Arg1845Cys Uncertain significance ★ ⚠ same residue
SETX p.Arg111Ter Pathogenic ★★ same condition
SETX p.Arg1363Ter Pathogenic ★★ same condition
SETX p.Arg1606Ter Pathogenic ★★ same condition
SETX p.Arg1778Ter Pathogenic/Likely pathogenic ★★ same condition
SETX p.Arg2098Ter Pathogenic ★★ same condition
SETX p.Arg332Trp Pathogenic/Likely pathogenic ★★ same condition
SETX p.Arg778Ter 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/setx-p-arg1845 (accessed [today's date]).

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