Is CBL p.Ile26Met (c.78T>G) pathogenic?

CBL p.Ile26Met (c.78T>G) is classified Uncertain significance in CBL (ClinVar, Multiple submitters, 2 submitters; last evaluated 2025-10-21). AlphaMissense: ambiguous (0.398); Very rare (popmax 0.000345%, nfe); Associated with Cardiovascular phenotype.

What condition is associated with CBL p.Ile26Met (c.78T>G)?

CBL p.Ile26Met (c.78T>G) is associated with Cardiovascular phenotype, RASopathy (ClinVar).

How common is CBL p.Ile26Met (c.78T>G) in the general population?

CBL p.Ile26Met (c.78T>G) is very rare (popmax 0.000345%, nfe) (gnomAD).

What do computational predictors say about CBL p.Ile26Met (c.78T>G)?

AlphaMissense predicts ambiguous (score 0.398) — an in-silico prediction, not a clinical call.

CBL p.Ile26Met

c.78T>G · VCV3626801

Uncertain significance Multiple submitters

Classification

Uncertain significance

ClinVar

Review

Multiple submitters ★★☆☆

ClinVar · 2 submitters

AlphaMissense

ambiguous

0.398 · ACMG-weighted

gnomAD v4.1

Rare

very rare (popmax 0.000345%, nfe)

Conditions

Cardiovascular phenotype

Computational evidence

Protein change
AlphaMissense	0.398	ambiguous
REVEL	0.423	indeterminate
SaProt	LLR -5.22	tolerated
Splicing
SpliceAI	—	not assessed · no allele here is in the release
Constraint at this position
Conservation	phyloP 0.56	GERP -2.8, phastCons 1
Regional constraint	o/e 0.97	unconstrained · MANE · 26 kb · p 0.76 · regional, not allelic
Overall
CADD	22.5	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 0.000345% European (non-Finnish) · 4/1,160,016 alleles

Filtering AF 8.1e-05% ClinGen BA1/BS1 input FAF95, joint · FAF99 5.4e-05%

Overall 0.000255% 4/1,570,066 alleles · very rare

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.Ile26Met
Coding: c.78T>G
MANE Select: NM_005188
Type: single nucleotide variant
Location: chr11:119206495 (GRCh38)
Gene constraint: LOEUF 0.622 · pLI <0.01 · ClinGen HI 0/3 (gnomAD)
Structure: AlphaFold pLDDT 64.27 · 34 PDB
Residue 26: the 'sufficient for interaction with ephb1' region

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.Ile26Thr Uncertain significance ★★ ⚠ same residue
CBL p.Ile26Leu Uncertain significance ★ same residue
CBL p.Ile26Val Uncertain significance ★ ⚠ same residue
CBL p.Ile26= Likely benign ★ 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

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-ile26met (accessed [today's date]).

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