Is CBL p.Ser252Cys (c.755C>G) pathogenic?

CBL p.Ser252Cys (c.755C>G) is classified Uncertain significance in CBL (ClinVar, Multiple submitters, 2 submitters; last evaluated 2025-01-13). AlphaMissense: likely benign (0.1588); Very rare (popmax 0.00501%, amr); Associated with Cardiovascular phenotype.

What condition is associated with CBL p.Ser252Cys (c.755C>G)?

CBL p.Ser252Cys (c.755C>G) is associated with Cardiovascular phenotype, RASopathy (ClinVar).

How common is CBL p.Ser252Cys (c.755C>G) in the general population?

CBL p.Ser252Cys (c.755C>G) is very rare (popmax 0.00501%, amr) (gnomAD).

What do computational predictors say about CBL p.Ser252Cys (c.755C>G)?

AlphaMissense predicts likely benign (score 0.1588) — an in-silico prediction, not a clinical call.

CBL p.Ser252Cys

c.755C>G · rs1477764968 · VCV1425487

Uncertain significance Multiple submitters

Classification

Uncertain significance

ClinVar

Review

Multiple submitters ★★☆☆

ClinVar · 2 submitters

AlphaMissense

likely benign

0.1588 · ACMG-weighted

gnomAD v4.1

Rare

very rare (popmax 0.00501%, amr)

Missense predictors

1/2 damaging

AlphaMissense, SaProt · REVEL no call

Conditions

Cardiovascular phenotype

Computational evidence

Protein change
AlphaMissense	0.1588	likely benign
REVEL	0.536	indeterminate
SaProt	LLR -10.65	damaging
⇒ SaProt calls this damaging; AlphaMissense does not; REVEL makes no call.
Splicing
SpliceAI	<0.2	all four deltas below 0.2 · C>T here scores Δ0.24 · evaluated, not missing
Constraint at this position
Conservation	phyloP 7.7	GERP 2.1, phastCons 1
Regional constraint	o/e 0.60	unconstrained · MANE · 45 kb · p 4.6e-13 · regional, not allelic
Overall
CADD	25.5	PHRED · no single calibrated threshold — expert panels disagree

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

Population frequency

gnomAD v4.1 · exomes + genomes

Grpmax group 0.00501% Admixed American · 3/59,928 alleles

Filtering AF 0.00133% ClinGen BA1/BS1 input FAF95, joint · FAF99 0.000668%

Overall 0.000248% 4/1,612,318 alleles · very rare

Ancestry group	Frequency	1 in
Admixed Americangrpmax	0.00501%	19,976
Remaining individualsnot grpmax-eligible	0.0016%	62,402

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: CBL
Protein: p.Ser252Cys
Coding: c.755C>G
MANE Select: NM_005188
dbSNP: rs1477764968
Type: single nucleotide variant
Location: chr11:119274839 (GRCh38)
Gene constraint: LOEUF 0.622 · pLI <0.01 · ClinGen HI 0/3 (gnomAD)
Structure: AlphaFold pLDDT 64.27 · 34 PDB
Residue 252: the cbl-ptb domain; the 'sufficient for interaction with ephb1' region; the 'sh2-like' region; an α-helix

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

Disease context

Cardiovascular phenotype — disease report on Sugi Atlas → Associated genes, phenotypes, clinical trials & treatments

Also linked: RASopathy

Similar variants

CBL p.Ser252Phe Uncertain significance ⚠ same residue
CBL c.1096-1G>C Pathogenic/Likely pathogenic ★★ same condition
CBL c.1096-1G>T Pathogenic ★★ same condition
CBL c.1228-2A>G Pathogenic/Likely pathogenic ★★ same condition
CBL p.Arg420Gln Pathogenic/Likely pathogenic ★★ same condition
CBL p.Arg420Leu Likely pathogenic ★★ same condition
CBL p.Gln367Arg Likely pathogenic ★★ same condition
CBL p.Gln367Pro Pathogenic/Likely pathogenic ★★ same condition

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/cbl-p-ser252cys (accessed [today's date]).

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