Is CBLB p.Ile191Val (c.571A>G) pathogenic?

CBLB p.Ile191Val (c.571A>G) is classified Uncertain significance in CBLB (ClinVar, Single submitter, 1 submitter; last evaluated 2025-06-25). AlphaMissense: likely benign (0.0666); Very rare (popmax 0.00669%, eas).

How common is CBLB p.Ile191Val (c.571A>G) in the general population?

CBLB p.Ile191Val (c.571A>G) is very rare (popmax 0.00669%, eas) (gnomAD).

What do computational predictors say about CBLB p.Ile191Val (c.571A>G)?

AlphaMissense predicts likely benign (score 0.0666) — an in-silico prediction, not a clinical call.

CBLB p.Ile191Val

c.571A>G · VCV4219947

Uncertain significance Single submitter

Classification

Uncertain significance

ClinVar

Review

Single submitter ★☆☆☆

ClinVar · 1 submitter

AlphaMissense

likely benign

0.0666 · ACMG-weighted

gnomAD v4.1

Rare

very rare (popmax 0.00669%, eas)

Missense predictors

0/2 damaging

AlphaMissense, SaProt · REVEL no call

Computational evidence

Protein change
AlphaMissense	0.0666	likely benign
REVEL	0.524	indeterminate
SaProt	LLR -9.93	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 7.9	GERP 2.8, phastCons 1
Regional constraint	o/e 0.72	unconstrained · MANE · 164 kb · p 3.4e-12 · regional, not allelic
Overall
CADD	22.0	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 0.00669% East Asian · 3/44,860 alleles

Filtering AF 0.00275% ClinGen BA1/BS1 input FAF95, joint · FAF99 0.00244%

Overall 0.00322% 52/1,613,138 alleles · very rare

Ancestry group	Frequency	1 in
East Asiangrpmax	0.00669%	14,953
African / African-American	0.004%	24,999
European (non-Finnish)	0.00365%	27,423
Remaining individualsnot grpmax-eligible	0.0032%	31,243
Admixed American	0.00167%	59,978

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: CBLB
Protein: p.Ile191Val
Coding: c.571A>G
MANE Select: NM_170662
Type: single nucleotide variant
Location: chr3:105751614 (GRCh38)
Gene constraint: LOEUF 0.406 · pLI 1.00 (gnomAD)
Structure: AlphaFold pLDDT 62.88 · 36 PDB
Residue 191: the cbl-ptb domain; the 'ef-hand-like' region; a β-strand

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

Similar variants

CBLB p.Arg670Gln Benign/Likely benign ★★ same type
CBLB p.Pro387= Benign ★★ same type
CBLB p.Pro689= Benign/Likely benign ★★ same type
CBLB p.Ser622Thr Benign/Likely benign ★★ same type
CBLB c.2569+1609A>C Uncertain significance ★ same type
CBLB p.Ala176Pro Uncertain significance ★ ⚠ same type
CBLB p.Ala2Glu Uncertain significance ★ ⚠ same type
CBLB p.Ala592Ser 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/cblb-p-ile191val (accessed [today's date]).

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