Is CAPN13 p.Arg33Gln (c.98G>A) pathogenic?

CAPN13 p.Arg33Gln (c.98G>A) is classified Likely benign in CAPN13 (ClinVar, Single submitter, 1 submitter; last evaluated 2024-03-25). AlphaMissense: likely benign (0.0698); Ultra-rare (popmax 0.0706%, afr).

How common is CAPN13 p.Arg33Gln (c.98G>A) in the general population?

CAPN13 p.Arg33Gln (c.98G>A) is ultra-rare (popmax 0.0706%, afr) (gnomAD).

What do computational predictors say about CAPN13 p.Arg33Gln (c.98G>A)?

AlphaMissense predicts likely benign (score 0.0698) — an in-silico prediction, not a clinical call.

CAPN13 p.Arg33Gln

c.98G>A · VCV3263178

Likely benign Single submitter

Classification

Likely benign

ClinVar

Review

Single submitter ★☆☆☆

ClinVar · 1 submitter

AlphaMissense

likely benign

0.0698 · ACMG-weighted

gnomAD v4.1

Rare

ultra-rare (popmax 0.0706%, afr)

Missense predictors

0/3 damaging

AlphaMissense, REVEL, SaProt

Computational evidence

Protein change
AlphaMissense	0.0698	likely benign
REVEL	0.034	moderately benign-leaning
SaProt	LLR -5.64	tolerated
⇒ AlphaMissense, REVEL and SaProt all call this tolerated.
Splicing
SpliceAI	—	not assessed · no allele here is in the release
Constraint at this position
Conservation	phyloP 0.24	GERP -4.6
Regional constraint	o/e 1.05	unconstrained · MANE · 57 kb · p 0.12 · regional, not allelic
Overall
CADD	4.905	PHRED · no single calibrated threshold — expert panels disagree

AlphaMissense carries the ACMG weight for missense; REVEL and SaProt are independent agreement signals.

Population frequency

gnomAD v4.1 · exomes + genomes

Grpmax group 0.0706% African / African-American · 53/75,020 alleles

Filtering AF 0.0554% ClinGen BA1/BS1 input FAF95, joint · FAF99 0.05%

Overall 0.00664% 107/1,611,566 alleles · ultra-rare

Ancestry group	Frequency	1 in
African / African-Americangrpmax	0.0706%	1,415
Middle Eastern	0.033%	3,029
Admixed American	0.0134%	7,466
South Asian	0.00555%	18,029
Remaining individualsnot grpmax-eligible	0.00481%	20,810
Ashkenazi Jewishnot grpmax-eligible	0.00339%	29,524
European (non-Finnish)	0.00288%	34,677
East Asian	0.00223%	44,832

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: CAPN13
Protein: p.Arg33Gln
Coding: c.98G>A
MANE Select: NM_144575
Type: single nucleotide variant
Location: chr2:30787228 (GRCh38)
Gene constraint: LOEUF 1.121 · pLI <0.01 (gnomAD)
Structure: AlphaFold pLDDT 83.25 · 1 PDB

Full CAPN13 gene report on Sugi Atlas → Gene function, pathways, protein structure, interactions & more

Similar variants

CAPN13 p.Ala172Ser Uncertain significance ★ ⚠ same type
CAPN13 p.Ala215Ser Uncertain significance ★ ⚠ same type
CAPN13 p.Ala2Val Uncertain significance ★ ⚠ same type
CAPN13 p.Ala326Val Uncertain significance ★ ⚠ same type
CAPN13 p.Ala460Gly Uncertain significance ★ ⚠ same type
CAPN13 p.Ala510Pro Uncertain significance ★ ⚠ same type
CAPN13 p.Ala564Val Uncertain significance ★ ⚠ same type
CAPN13 p.Ala90Ser Uncertain significance ★ ⚠ same type

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/capn13-p-arg33gln (accessed [today's date]).

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