Is CBL p.Ser798Phe (c.2393C>T) pathogenic?

CBL p.Ser798Phe (c.2393C>T) is classified Uncertain significance in CBL (ClinVar, Multiple submitters, 4 submitters; last evaluated 2025-08-02). AlphaMissense: likely benign (0.1388); Ultra-rare (popmax 0.0113%, nfe); Associated with RASopathy.

What condition is associated with CBL p.Ser798Phe (c.2393C>T)?

CBL p.Ser798Phe (c.2393C>T) is associated with RASopathy, CBL-related disorder (ClinVar).

How common is CBL p.Ser798Phe (c.2393C>T) in the general population?

CBL p.Ser798Phe (c.2393C>T) is ultra-rare (popmax 0.0113%, nfe) (gnomAD).

What do computational predictors say about CBL p.Ser798Phe (c.2393C>T)?

AlphaMissense predicts likely benign (score 0.1388) — an in-silico prediction, not a clinical call.

CBL p.Ser798Phe

c.2393C>T · rs587778158 · VCV133811

Uncertain significance Multiple submitters

Classification

Uncertain significance

ClinVar

Review

Multiple submitters ★★☆☆

ClinVar · 4 submitters

AlphaMissense

likely benign

0.1388 · ACMG-weighted

gnomAD v4.1

Rare

ultra-rare (popmax 0.0113%, nfe)

Missense predictors

0/2 damaging

AlphaMissense, SaProt · REVEL no call

Conditions

RASopathy

Computational evidence

Protein change
AlphaMissense	0.1388	likely benign
REVEL	0.375	indeterminate
SaProt	LLR -9.67	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 4.9	GERP 1.6, phastCons 1
Regional constraint	o/e 1.05	unconstrained · MANE · 22 kb · p 0.19 · regional, not allelic
Overall
CADD	23.3	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 0.0113% European (non-Finnish) · 133/1,179,998 alleles

Filtering AF 0.00969% ClinGen BA1/BS1 input FAF95, joint · FAF99 0.00905%

Overall 0.00855% 138/1,614,020 alleles · ultra-rare

Ancestry group	Frequency	1 in
European (non-Finnish)grpmax	0.0113%	8,872
Remaining individualsnot grpmax-eligible	0.0064%	15,621
East Asian	0.00223%	44,892

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.Ser798Phe
Coding: c.2393C>T
MANE Select: NM_005188
dbSNP: rs587778158
Type: single nucleotide variant
Location: chr11:119298499 (GRCh38)
Gene constraint: LOEUF 0.622 · pLI <0.01 · ClinGen HI 0/3 (gnomAD)
Structure: AlphaFold pLDDT 64.27 · 34 PDB
Residue 798: the 'required for ubiquitination of spred2' region; the 'interaction with cd2ap' region

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

Disease context

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

Also linked: CBL-related disorder

Similar variants

CBL p.Ser798= Likely benign ★★ same residue
CBL p.Ser798Pro Uncertain significance ★ ⚠ same residue
CBL c.1096-1G>C Pathogenic/Likely pathogenic ★★ same condition
CBL c.1096-1G>T Pathogenic ★★ same condition
CBL c.1096-2A>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

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-ser798phe (accessed [today's date]).

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