rs77284821

Variant names:

Variant summary

Our verdict is Benign. Variant got -18 ACMG points: 0P and 18B. BP4_ModerateBP6_Very_StrongBA1

The NM_005188.4(CBL):c.869+4A>G variant causes a splice region, intron change involving the alteration of a non-conserved nucleotide. The variant allele was found at a frequency of 0.00356 in 1,613,604 control chromosomes in the GnomAD database, including 191 homozygotes. In-silico tool predicts a benign outcome for this variant. 3/3 splice prediction tools predict no significant impact on normal splicing. Variant has been reported in ClinVar as Benign (★★).

Frequency

Genomes: 𝑓 0.019 ( 102 hom., cov: 32)

Exomes 𝑓: 0.0020 ( 89 hom. )

Consequence

CBL
NM_005188.4 splice_region, intron

Scores

Splicing: ADA: 0.9309

Clinical Significance

Benign criteria provided, multiple submitters, no conflicts B:14

Conservation

PhyloP100: 2.73

Variant links:

Genes affected

CBL (HGNC:1541): (Cbl proto-oncogene) This gene is a proto-oncogene that encodes a RING finger E3 ubiquitin ligase. The encoded protein is one of the enzymes required for targeting substrates for degradation by the proteasome. This protein mediates the transfer of ubiquitin from ubiquitin conjugating enzymes (E2) to specific substrates. This protein also contains an N-terminal phosphotyrosine binding domain that allows it to interact with numerous tyrosine-phosphorylated substrates and target them for proteasome degradation. As such it functions as a negative regulator of many signal transduction pathways. This gene has been found to be mutated or translocated in many cancers including acute myeloid leukaemia, and expansion of CGG repeats in the 5' UTR has been associated with Jacobsen syndrome. Mutations in this gene are also the cause of Noonan syndrome-like disorder. [provided by RefSeq, Jul 2016]

CBL links:

Genome browser will be placed here

ACMG classification

Classification made for transcript

Verdict is Benign. Variant got -18 ACMG points.

BP4

Computational evidence support a benign effect (BayesDel_noAF=-0.35).

BP6

Variant 11-119274957-A-G is Benign according to our data. Variant chr11-119274957-A-G is described in ClinVar as [Benign]. Clinvar id is 45211.Status of the report is criteria_provided_multiple_submitters_no_conflicts, 2 stars. Variant chr11-119274957-A-G is described in Lovd as [Benign].

BA1

GnomAd4 highest subpopulation (AFR) allele frequency at 95% confidence interval = 0.0635 is higher than 0.05.

Transcripts

RefSeq

Gene	Transcript	HGVSc	HGVSp	Effect	Exon rank	MANE	Protein	UniProt
CBL	NM_005188.4 link	c.869+4A>G		splice_region_variant, intron_variant	Intron 5 of 15	ENST00000264033.6	NP_005179.2

Ensembl

Gene	Transcript	HGVSc	HGVSp	Effect	Exon rank	TSL	MANE	Protein	Appris	UniProt
CBL	ENST00000264033.6 link	c.869+4A>G		splice_region_variant, intron_variant	Intron 5 of 15	1	NM_005188.4	ENSP00000264033.3		P22681

Frequencies

GnomAD3 genomes

AF:

0.0188

AC:

2853

AN:

151862

Hom.:

102

Cov.:

show subpopulations

Gnomad AFR

AF:

0.0656

Gnomad AMI

AF:

0.00

Gnomad AMR

AF:

0.00629

Gnomad ASJ

AF:

0.00

Gnomad EAS

AF:

0.00

Gnomad SAS

AF:

0.000211

Gnomad FIN

AF:

0.00

Gnomad MID

AF:

0.00

Gnomad NFE

AF:

0.000309

Gnomad OTH

AF:

0.0106

GnomAD3 exomes

AF:

0.00503

AC:

1266

AN:

251474

Hom.:

AF XY:

0.00353

AC XY:

480

AN XY:

135910

show subpopulations

Gnomad AFR exome

AF:

0.0696

Gnomad AMR exome

AF:

0.00330

Gnomad ASJ exome

AF:

0.0000992

Gnomad EAS exome

AF:

0.00

Gnomad SAS exome

AF:

0.0000327

Gnomad FIN exome

AF:

0.00

Gnomad NFE exome

AF:

0.0000615

Gnomad OTH exome

AF:

0.00196

GnomAD4 exome

AF:

0.00198

AC:

2890

AN:

1461624

Hom.:

Cov.:

AF XY:

0.00163

AC XY:

1186

AN XY:

727120

show subpopulations

Gnomad4 AFR exome

AF:

0.0698

Gnomad4 AMR exome

AF:

0.00358

Gnomad4 ASJ exome

AF:

0.000191

Gnomad4 EAS exome

AF:

0.00

Gnomad4 SAS exome

AF:

0.000162

Gnomad4 FIN exome

AF:

0.00

Gnomad4 NFE exome

AF:

0.0000621

Gnomad4 OTH exome

AF:

0.00484

GnomAD4 genome

AF:

0.0188

AC:

2862

AN:

151980

Hom.:

102

Cov.:

AF XY:

0.0178

AC XY:

1321

AN XY:

74252

show subpopulations

Gnomad4 AFR

AF:

0.0656

Gnomad4 AMR

AF:

0.00635

Gnomad4 ASJ

AF:

0.00

Gnomad4 EAS

AF:

0.00

Gnomad4 SAS

AF:

0.000211

Gnomad4 FIN

AF:

0.00

Gnomad4 NFE

AF:

0.000309

Gnomad4 OTH

AF:

0.0104

Alfa

AF:

0.00888

Hom.:

Bravo

AF:

0.0217

Asia WGS

AF:

0.00260

AC:

AN:

3478

EpiCase

AF:

0.000327

EpiControl

AF:

0.0000593

ClinVar

Significance: Benign

Submissions summary: Benign:14

Revision: criteria provided, multiple submitters, no conflicts

LINK: link

Submissions by phenotype

not specified

Benign:5

Mar 19, 2012

Laboratory for Molecular Medicine, Mass General Brigham Personalized Medicine

Significance: Benign

Review Status: criteria provided, single submitter

Collection Method: clinical testing

c.869+4A>G in Intron 05 of CBL: This variant is not expected to have clinical si gnificance because it has been identified in 6.8% (255/3736) of African American chromosomes from a broad population by the NHLBI Exome Sequencing Project (http ://evs.gs.washington.edu/EVS; dbSNP rs77284821). -

Joint Genome Diagnostic Labs from Nijmegen and Maastricht, Radboudumc and MUMC+

Significance: Benign

Review Status: no assertion criteria provided

Collection Method: clinical testing

- -

Sep 09, 2019

Women's Health and Genetics/Laboratory Corporation of America, LabCorp

Significance: Benign

Review Status: criteria provided, single submitter

Collection Method: clinical testing

Variant summary: CBL c.869+4A>G alters a conserved nucleotide located close to a canonical splice site and therefore could affect mRNA splicing, leading to a significantly altered protein sequence. 4/4 computational tools predict no significant impact on normal splicing. However, these predictions have yet to be confirmed by functional studies. The variant allele was found at a frequency of 0.005 in 251474 control chromosomes, predominantly at a frequency of 0.07 within the African or African-American subpopulation in the gnomAD database, including 40 homozygotes. The observed variant frequency within African or African-American control individuals in the gnomAD database is approximately 28000 fold of the estimated maximal expected allele frequency for a pathogenic variant in CBL causing Noonan Syndrome and Related Conditions phenotype (2.5e-06), strongly suggesting that the variant is a benign polymorphism found primarily in populations of African or African-American origin. To our knowledge, no occurrence of c.869+4A>G in individuals affected with Noonan Syndrome and Related Conditions and no experimental evidence demonstrating its impact on protein function have been reported. Three ClinVar submissions (evaluation after 2014) cites the variant as benign. Based on the evidence outlined above, the variant was classified as benign. -

Genome Diagnostics Laboratory, Amsterdam University Medical Center

Significance: Benign

Review Status: no assertion criteria provided

Collection Method: clinical testing

- -

PreventionGenetics, part of Exact Sciences

Significance: Benign

Review Status: criteria provided, single submitter

Collection Method: clinical testing

- -

not provided

Benign:3

Oct 10, 2024

ARUP Laboratories, Molecular Genetics and Genomics, ARUP Laboratories

Significance: Benign

Review Status: criteria provided, single submitter

Collection Method: clinical testing

- -

May 14, 2015

Center for Pediatric Genomic Medicine, Children's Mercy Hospital and Clinics

Significance: Benign

Review Status: criteria provided, single submitter

Collection Method: clinical testing

- -

Breakthrough Genomics, Breakthrough Genomics

Significance: Benign

Review Status: criteria provided, single submitter

Collection Method: not provided

- -

RASopathy

Benign:2

May 04, 2012

GeneDx

Significance: Benign

Review Status: criteria provided, single submitter

Collection Method: clinical testing

The variant is found in NOONAN panel(s). -

Feb 03, 2025

Labcorp Genetics (formerly Invitae), Labcorp

Significance: Benign

Review Status: criteria provided, single submitter

Collection Method: clinical testing

- -

CBL-related disorder

Benign:1

Jan 13, 2018

Illumina Laboratory Services, Illumina

Significance: Benign

Review Status: criteria provided, single submitter

Collection Method: clinical testing

This variant was observed in the ICSL laboratory as part of a predisposition screen in an ostensibly healthy population. It had not been previously curated by ICSL or reported in the Human Gene Mutation Database (HGMD: prior to June 1st, 2018), and was therefore a candidate for classification through an automated scoring system. Utilizing variant allele frequency, disease prevalence and penetrance estimates, and inheritance mode, an automated score was calculated to assess if this variant is too frequent to cause the disease. Based on the score and internal cut-off values, a variant classified as benign is not then subjected to further curation. The score for this variant resulted in a classification of benign for this disease. -

Juvenile myelomonocytic leukemia

Benign:1

Jul 07, 2023

KCCC/NGS Laboratory, Kuwait Cancer Control Center

Significance: Benign

Review Status: criteria provided, single submitter

Collection Method: clinical testing

- -

Cardiovascular phenotype

Benign:1

Aug 22, 2019

Ambry Genetics

Significance: Benign

Review Status: criteria provided, single submitter

Collection Method: clinical testing

This alteration is classified as benign based on a combination of the following: seen in unaffected individuals, population frequency, intact protein function, lack of segregation with disease, co-occurrence, RNA analysis, in silico models, amino acid conservation, lack of disease association in case-control studies, and/or the mechanism of disease or impacted region is inconsistent with a known cause of pathogenicity. -

Noonan syndrome and Noonan-related syndrome

Benign:1

Jun 21, 2021

Genome Diagnostics Laboratory, The Hospital for Sick Children

Significance: Benign

Review Status: criteria provided, single submitter

Collection Method: clinical testing

- -

Computational scores

Source: dbNSFP v4.3

Name

Calibrated prediction

Score

Prediction

BayesDel_noAF

Benign

-0.35

CADD

Benign

DANN

Benign

0.96

Splicing

Name

Calibrated prediction

Score

Prediction

dbscSNV1_ADA

Benign

0.93

dbscSNV1_RF

Benign

0.70

SpliceAI score (max)

0.010

Details are displayed if max score is > 0.2

Find out detailed SpliceAI scores and Pangolin per-transcript scores at spliceailookup.broadinstitute.org

Publications

LitVar

Below is the list of publications found by LitVar. It may be empty.

Variant summary

Frequency

Consequence

Scores

Clinical Significance

Conservation

ACMG classification

Transcripts

RefSeq

Ensembl

Frequencies

ClinVar

Submissions by phenotype

Computational scores

Splicing

Publications

LitVar

Other links and lift over