Is CDH23 p.Arg76= (c.228C>T) pathogenic?

CDH23 p.Arg76= (c.228C>T) is classified Likely benign in CDH23 (ClinVar, Single submitter, 1 submitter; last evaluated 2025-12-08). Very rare (popmax 0.00266%, afr).

How common is CDH23 p.Arg76= (c.228C>T) in the general population?

CDH23 p.Arg76= (c.228C>T) is very rare (popmax 0.00266%, afr) (gnomAD).

CDH23 p.Arg76=

c.228C>T · rs1406475680 · VCV2165990

Likely benign Single submitter

Classification

Likely benign

ClinVar

Review

Single submitter ★☆☆☆

ClinVar · 1 submitter

gnomAD v4.1

Rare

very rare (popmax 0.00266%, afr)

Computational evidence

Protein change
Missense predictors do not apply to this variant type; conservation carries the signal.
Splicing
SpliceAI	—	not assessed · no allele here is in the release
Constraint at this position
Conservation	phyloP -0.84	GERP -3.4, phastCons 0.004
Overall
CADD	8.099	PHRED · no single calibrated threshold — expert panels disagree

Population frequency

gnomAD v4.1 · exomes + genomes

Grpmax group 0.00266% African / African-American · 2/75,052 alleles

Filtering AF 0.000442% ClinGen BA1/BS1 input FAF95, joint · FAF99 0.000166%

Overall 0.000205% 3/1,461,680 alleles · very rare

Ancestry group	Frequency	1 in
African / African-Americangrpmax	0.00266%	37,526
Admixed American	0.00167%	60,022

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: CDH23
Protein: p.Arg76=
Coding: c.228C>T
MANE Select: NM_022124
dbSNP: rs1406475680
Type: single nucleotide variant
Location: chr10:71510164 (GRCh38)
Gene constraint: LOEUF 0.685 · pLI <0.01 · ClinGen HI gene assoc. with recessive phenotype (gnomAD)
Residue 76: the cadherin 1 domain

Full CDH23 gene report on Sugi Atlas → Gene function, pathways, protein structure, interactions & more

Similar variants

CDH23 p.Arg76His Uncertain significance ★★ ⚠ same residue
CDH23 p.Arg76Cys Uncertain significance ★ same residue
CDH23 p.Arg76Ser Uncertain significance ★ ⚠ same residue
CDH23 p.Arg2029Trp Pathogenic ★★★ ⚠ same type
CDH23 p.Asp127Gly Likely pathogenic ★★★ same type
CDH23 p.Glu956Lys Pathogenic ★★★ same type
CDH23 p.Pro240Leu Pathogenic ★★★ same type
CDH23 c.1515-12G>A 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/cdh23-p-arg76 (accessed [today's date]).

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