Is ASCC2 p.Arg58His (c.173G>A) pathogenic?

ASCC2 p.Arg58His (c.173G>A) is classified Uncertain significance in ASCC2 (ClinVar, Single submitter, 1 submitter; last evaluated 2025-08-27). AlphaMissense: likely benign (0.1829); Very rare (popmax 0.004%, afr).

How common is ASCC2 p.Arg58His (c.173G>A) in the general population?

ASCC2 p.Arg58His (c.173G>A) is very rare (popmax 0.004%, afr) (gnomAD).

What do computational predictors say about ASCC2 p.Arg58His (c.173G>A)?

AlphaMissense predicts likely benign (score 0.1829) — an in-silico prediction, not a clinical call.

ASCC2 p.Arg58His

c.173G>A · rs766086654 · VCV2323966

Uncertain significance Single submitter

Classification

Uncertain significance

ClinVar

Review

Single submitter ★☆☆☆

ClinVar · 1 submitter

AlphaMissense

likely benign

0.1829 · ACMG-weighted

gnomAD v4.1

Rare

very rare (popmax 0.004%, afr)

Missense predictors

0/3 damaging

AlphaMissense, REVEL, SaProt

Computational evidence

Protein change
AlphaMissense	0.1829	likely benign
REVEL	0.071	moderately benign-leaning
SaProt	LLR -6.38	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 6	GERP 2.6, phastCons 1
Regional constraint	o/e 0.88	unconstrained · MANE · 43 kb · p 0.00015 · regional, not allelic
Overall
CADD	24.1	PHRED · no single calibrated threshold — expert panels disagree

ClinVar classifies this uncertain; the computational predictors unanimously lean tolerated — a triage signal, not a reclassification

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

Population frequency

gnomAD v4.1 · exomes + genomes

Grpmax group 0.004% African / African-American · 3/74,912 alleles

Filtering AF 0.00153% ClinGen BA1/BS1 input FAF95, joint · FAF99 0.0013%

Overall 0.00198% 32/1,614,076 alleles · very rare

Ancestry group	Frequency	1 in
African / African-Americangrpmax	0.004%	24,971
Admixed American	0.00333%	30,002
European (non-Finnish)	0.0022%	45,386
Remaining individualsnot grpmax-eligible	0.0016%	62,488

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: ASCC2
Protein: p.Arg58His
Coding: c.173G>A
MANE Select: NM_032204
dbSNP: rs766086654
Type: single nucleotide variant
Location: chr22:29825689 (GRCh38)
Gene constraint: LOEUF 0.593 · pLI <0.01 (gnomAD)
Structure: AlphaFold pLDDT 78.15 · 2 PDB
Residue 58: an α-helix

Full ASCC2 gene report on Sugi Atlas → Gene function, pathways, protein structure, interactions & more

Similar variants

ASCC2 p.Ala258Val Uncertain significance ★ ⚠ same type
ASCC2 p.Ala26Val Uncertain significance ★ ⚠ same type
ASCC2 p.Ala414Ser Uncertain significance ★ ⚠ same type
ASCC2 p.Ala457Val Uncertain significance ★ ⚠ same type
ASCC2 p.Ala50Thr Uncertain significance ★ ⚠ same type
ASCC2 p.Ala732Asp Uncertain significance ★ ⚠ same type
ASCC2 p.Ala735Val Uncertain significance ★ ⚠ same type
ASCC2 p.Ala738Gly 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/ascc2-p-arg58his (accessed [today's date]).

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