Is CBX2 p.Arg137His (c.410G>A) pathogenic?

CBX2 p.Arg137His (c.410G>A) is classified Uncertain significance in CBX2 (ClinVar, Multiple submitters, 2 submitters; last evaluated 2025-10-29). AlphaMissense: likely benign (0.3256); Very rare (popmax 0.00329%, sas).

How common is CBX2 p.Arg137His (c.410G>A) in the general population?

CBX2 p.Arg137His (c.410G>A) is very rare (popmax 0.00329%, sas) (gnomAD).

What do computational predictors say about CBX2 p.Arg137His (c.410G>A)?

AlphaMissense predicts likely benign (score 0.3256) — an in-silico prediction, not a clinical call.

CBX2 p.Arg137His

c.410G>A · VCV4648791

Uncertain significance Multiple submitters

Classification

Uncertain significance

ClinVar

Review

Multiple submitters ★★☆☆

ClinVar · 2 submitters

AlphaMissense

likely benign

0.3256 · ACMG-weighted

gnomAD v4.1

Rare

very rare (popmax 0.00329%, sas)

Missense predictors

0/2 damaging

AlphaMissense, SaProt · REVEL no call

Computational evidence

Protein change
AlphaMissense	0.3256	likely benign
REVEL	0.368	indeterminate
SaProt	LLR -8.40	tolerated
⇒ AlphaMissense and SaProt both call this tolerated; REVEL makes no call.
Splicing
SpliceAI	—	not assessed · no allele here is in the release
Constraint at this position
Conservation	phyloP 12	GERP 1.6, phastCons 1
Regional constraint	o/e 1.08	unconstrained · MANE · 5,618 bp · p 0.049 · regional, not allelic
Overall
CADD	27.4	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 0.00329% South Asian · 3/91,054 alleles

Filtering AF 0.000875% ClinGen BA1/BS1 input FAF95, joint · FAF99 0.000443%

Overall 0.000496% 8/1,613,570 alleles · very rare

Ancestry group	Frequency	1 in
South Asiangrpmax	0.00329%	30,351
Remaining individualsnot grpmax-eligible	0.0016%	62,456
African / African-American	0.00133%	74,920
European (non-Finnish)	0.000254%	393,264

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: CBX2
Protein: p.Arg137His
Coding: c.410G>A
MANE Select: NM_005189
Type: single nucleotide variant
Location: chr17:79783853 (GRCh38)
Gene constraint: LOEUF 0.946 · pLI <0.01 (gnomAD)
Structure: AlphaFold pLDDT 57.29 · 3 PDB
Residue 137: the 'disordered' region

Full CBX2 gene report on Sugi Atlas → Gene function, pathways, protein structure, interactions & more

Similar variants

CBX2 p.Arg137Cys Uncertain significance ★ ⚠ same residue
CBX2 c.288+52G>T Uncertain significance ★★ same type
CBX2 p.Gln349His Uncertain significance ★★ ⚠ same type
CBX2 p.Gly133Ser Uncertain significance ★★ ⚠ same type
CBX2 p.Gly287Arg Uncertain significance ★★ ⚠ same type
CBX2 p.Gly332Asp Uncertain significance ★★ ⚠ same type
CBX2 p.Met260Val Uncertain significance ★★ ⚠ same type
CBX2 p.Met404Leu 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/cbx2-p-arg137his (accessed [today's date]).

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