Is CEP131 p.Ser223Arg (c.669C>A) pathogenic?

CEP131 p.Ser223Arg (c.669C>A) is classified Uncertain significance in CEP131 (ClinVar, Single submitter, 1 submitter; last evaluated 2022-08-30). AlphaMissense: likely benign (0.2298); Very rare (popmax 0.00133%, afr).

How common is CEP131 p.Ser223Arg (c.669C>A) in the general population?

CEP131 p.Ser223Arg (c.669C>A) is very rare (popmax 0.00133%, afr) (gnomAD).

What do computational predictors say about CEP131 p.Ser223Arg (c.669C>A)?

AlphaMissense predicts likely benign (score 0.2298) — an in-silico prediction, not a clinical call.

CEP131 p.Ser223Arg

c.669C>A · rs753738447 · VCV2309531

Uncertain significance Single submitter

Classification

Uncertain significance

ClinVar

Review

Single submitter ★☆☆☆

ClinVar · 1 submitter

AlphaMissense

likely benign

0.2298 · ACMG-weighted

gnomAD v4.1

Rare

very rare (popmax 0.00133%, afr)

Missense predictors

0/3 damaging

AlphaMissense, REVEL, SaProt

Computational evidence

Protein change
AlphaMissense	0.2298	likely benign
REVEL	0.076	moderately benign-leaning
SaProt	LLR -6.71	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 1.5	GERP -0.34, phastCons 0.025
Regional constraint	o/e 0.77	unconstrained · MANE · 7,388 bp · p 4.5e-05 · regional, not allelic
Overall
CADD	17.11	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 0.00133% African / African-American · 1/75,070 alleles

Filtering AF 0.000429% ClinGen BA1/BS1 input FAF95, joint · FAF99 0.000312%

Overall 0.000753% 11/1,461,274 alleles · very rare

Ancestry group	Frequency	1 in
African / African-Americangrpmax	0.00133%	75,070
European (non-Finnish)	0.000847%	117,994

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: CEP131
Protein: p.Ser223Arg
Coding: c.669C>A
MANE Select: NM_014984
dbSNP: rs753738447
Type: single nucleotide variant
Location: chr17:81202359 (GRCh38)
Gene constraint: LOEUF 1.031 · pLI <0.01 (gnomAD)
Structure: AlphaFold pLDDT 67.20
Residue 223: the 'interaction with plk4' region; the 'disordered' region

Full CEP131 gene report on Sugi Atlas → Gene function, pathways, protein structure, interactions & more

Similar variants

CEP131 p.Pro365Ser Uncertain significance ★★ ⚠ same type
CEP131 p.Ala1024Thr Uncertain significance ★ ⚠ same type
CEP131 p.Ala1042Ser Uncertain significance ★ ⚠ same type
CEP131 p.Ala113Pro Uncertain significance ★ ⚠ same type
CEP131 p.Ala271Pro Uncertain significance ★ ⚠ same type
CEP131 p.Ala332Ser Uncertain significance ★ ⚠ same type
CEP131 p.Ala403Val Uncertain significance ★ ⚠ same type
CEP131 p.Ala436Glu 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/cep131-p-ser223arg (accessed [today's date]).

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