Is CEP250 p.Arg149Gln (c.446G>A) pathogenic?

CEP250 p.Arg149Gln (c.446G>A) is classified Uncertain significance in CEP250 (ClinVar, Multiple submitters, 2 submitters; last evaluated 2024-08-05). AlphaMissense: likely benign (0.0972); Very rare (popmax 0.00224%, eas).

How common is CEP250 p.Arg149Gln (c.446G>A) in the general population?

CEP250 p.Arg149Gln (c.446G>A) is very rare (popmax 0.00224%, eas) (gnomAD).

What do computational predictors say about CEP250 p.Arg149Gln (c.446G>A)?

AlphaMissense predicts likely benign (score 0.0972) — an in-silico prediction, not a clinical call.

CEP250 p.Arg149Gln

c.446G>A · rs763474027 · VCV1042557

Uncertain significance Multiple submitters

Classification

Uncertain significance

ClinVar

Review

Multiple submitters ★★☆☆

ClinVar · 2 submitters

AlphaMissense

likely benign

0.0972 · ACMG-weighted

gnomAD v4.1

Rare

very rare (popmax 0.00224%, eas)

Missense predictors

0/3 damaging

AlphaMissense, REVEL, SaProt

Computational evidence

Protein change
AlphaMissense	0.0972	likely benign
REVEL	0.091	moderately benign-leaning
SaProt	LLR -5.80	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 6.6	GERP 0.43, phastCons 1
Regional constraint	o/e 0.87	unconstrained · MANE · 49 kb · p 4.8e-12 · regional, not allelic
Overall
CADD	24.2	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 0.00224% East Asian · 1/44,718 alleles

Filtering AF 0.00069% ClinGen BA1/BS1 input FAF95, joint · FAF99 0.000539%

Overall 0.00117% 17/1,458,246 alleles · very rare

Ancestry group	Frequency	1 in
East Asiangrpmax	0.00224%	44,718
African / African-American	0.00134%	74,906
European (non-Finnish)	0.00119%	84,146
South Asian	0.0011%	90,550

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: CEP250
Protein: p.Arg149Gln
Coding: c.446G>A
MANE Select: NM_007186
dbSNP: rs763474027
Type: single nucleotide variant
Location: chr20:35466158 (GRCh38)
Gene constraint: LOEUF 0.86 · pLI <0.01 (gnomAD)
Structure: AlphaFold pLDDT 64.68 · 1 PDB
Residue 149: a UniProt-annotated variant site (in crdhl2)

Full CEP250 gene report on Sugi Atlas → Gene function, pathways, protein structure, interactions & more

Similar variants

CEP250 p.Arg149= Likely benign ★ same residue
CEP250 p.Arg1045Ter Pathogenic/Likely pathogenic ★★ same type
CEP250 p.Arg1155Ter Pathogenic/Likely pathogenic ★★ same type
CEP250 p.Arg1336Ter Pathogenic/Likely pathogenic ★★ same type
CEP250 p.Arg1343Ter Pathogenic/Likely pathogenic ★★ same type
CEP250 p.Arg1499Ter Pathogenic/Likely pathogenic ★★ same type
CEP250 p.Arg1695Ter Pathogenic/Likely pathogenic ★★ same type
CEP250 p.Arg1869Ter Pathogenic/Likely pathogenic ★★ 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/cep250-p-arg149gln (accessed [today's date]).

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