NM_005188.4:c.1962A>T

Variant names:

• chr11-119287872-A-T
• rs727502915
• NM_005188.4:c.1962A>T

Variant summary

Our verdict is Likely benign. The variant received -2 ACMG points: 2P and 4B. PM2 BP4_Strong

The NM_005188.4(CBL):​c.1962A>T​(p.Leu654Phe) variant causes a missense change involving the alteration of a non-conserved nucleotide. The variant was absent in control chromosomes in GnomAD project. In-silico tool predicts a benign outcome for this variant. 17/22 in silico tools predict a benign outcome for this variant. Variant has been reported in ClinVar as Uncertain significance (★★). Synonymous variant affecting the same amino acid position (i.e. L654L) has been classified as Likely benign.

• Frequency: Genomes: not found (cov: 32)
• Consequence: CBL NM_005188.4 missense
• Clinical Significance: Uncertain significance criteria provided, multiple submitters, no conflicts U:2
• Conservation: PhyloP100: 0.340
• Publications: 0 publications found

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 Gene-Disease associations (from GenCC):

• CBL-related disorder

  Inheritance: AD Classification: DEFINITIVE, STRONG, SUPPORTIVE Submitted by: G2P, Ambry Genetics, Orphanet, Labcorp Genetics (formerly Invitae), ClinGen, PanelApp Australia, Genomics England PanelApp
• juvenile myelomonocytic leukemia

  Inheritance: AD Classification: STRONG Submitted by: Labcorp Genetics (formerly Invitae)
• Noonan syndrome

  Inheritance: AD Classification: SUPPORTIVE Submitted by: Orphanet

ACMG classification

Our verdict: Likely_benign. The variant received -2 ACMG points.

• PM2: Very rare variant in population databases, with high coverage
• BP4: Computational evidence support a benign effect (MetaRNN=0.041197717).

Variant Effect in Transcripts

ACMG analysis was done for transcript: NM_005188.4. You can select a different transcript below to see updated ACMG assignments.

RefSeq Transcripts

Selected	Gene	Transcript	Tags	HGVSc	HGVSp	Effect	Exon Rank	Protein	UniProt
	CBL	NM_005188.4	MANE Select	c.1962A>T	p.Leu654Phe	missense	Exon 12 of 16	NP_005179.2

Ensembl Transcripts

Selected	Gene	Transcript	Tags	HGVSc	HGVSp	Effect	Exon Rank	Protein	UniProt
	CBL	ENST00000264033.6	TSL:1 MANE Select	c.1962A>T	p.Leu654Phe	missense	Exon 12 of 16	ENSP00000264033.3
	CBL	ENST00000634586.1	TSL:5	c.1962A>T	p.Leu654Phe	missense	Exon 12 of 18	ENSP00000489218.1
	CBL	ENST00000637974.1	TSL:5	c.1956A>T	p.Leu652Phe	missense	Exon 12 of 17	ENSP00000490763.1

Frequencies

GnomAD3 genomes Cov.: 32

GnomAD4 exome Cov.: 29

GnomAD4 genome Cov.: 32

ClinVar

Significance: Uncertain significance

Submissions summary: Uncertain:2

Revision: criteria provided, multiple submitters, no conflicts

Submissions by phenotype

Cardiovascular phenotype Uncertain:1

Mar 25, 2025

Ambry Genetics

Significance: Uncertain significance

Review Status: criteria provided, single submitter

Collection Method: clinical testing

The p.L654F variant (also known as c.1962A>T), located in coding exon 12 of the CBL gene, results from an A to T substitution at nucleotide position 1962. The leucine at codon 654 is replaced by phenylalanine, an amino acid with highly similar properties. This amino acid position is conserved. In addition, this alteration is predicted to be tolerated by in silico analysis. Based on the available evidence, the clinical significance of this variant remains unclear.

RASopathy Uncertain:1

Feb 17, 2024

Labcorp Genetics (formerly Invitae), Labcorp

Significance: Uncertain significance

Review Status: criteria provided, single submitter

Collection Method: clinical testing

This sequence change replaces leucine, which is neutral and non-polar, with phenylalanine, which is neutral and non-polar, at codon 654 of the CBL protein (p.Leu654Phe). This variant is not present in population databases (gnomAD no frequency). This variant has not been reported in the literature in individuals affected with CBL-related conditions. ClinVar contains an entry for this variant (Variation ID: 1351827). Advanced modeling of protein sequence and biophysical properties (such as structural, functional, and spatial information, amino acid conservation, physicochemical variation, residue mobility, and thermodynamic stability) performed at Invitae indicates that this missense variant is not expected to disrupt CBL protein function with a negative predictive value of 95%. In summary, the available evidence is currently insufficient to determine the role of this variant in disease. Therefore, it has been classified as a Variant of Uncertain Significance.

Computational scores

Source: dbNSFP v4.9

Name	Calibrated prediction	Score	Prediction
AlphaMissense	Benign	0.065
BayesDel_addAF	Benign	-0.18	T
BayesDel_noAF	Benign	-0.49
CADD	Benign	14
DANN	Benign	0.87
DEOGEN2	Benign	0.33	T
Eigen	Benign	-1.0
Eigen_PC	Benign	-0.92
FATHMM_MKL	Benign	0.11	N
LIST_S2	Benign	0.82	T
M_CAP	Benign	0.028	D
MetaRNN	Benign	0.041	T
MetaSVM	Benign	-1.0	T
MutationAssessor	Benign	1.6	L
PhyloP100		0.34
PrimateAI	Benign	0.34	T
PROVEAN	Benign	-0.13	N
REVEL	Benign	0.12
Sift	Benign	0.20	T
Sift4G	Benign	0.72	T
Polyphen		0.0	B
Vest4		0.087
MutPred		0.11		Gain of glycosylation at S652 (P = 0.1858)
MVP		0.82
MPC		0.21
ClinPred		0.038	T
GERP RS		2.8
Varity_R		0.030
gMVP		0.15
Mutation Taster		=97/3	polymorphism

Splicing

Name	Calibrated prediction	Score	Prediction
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

Other links and lift over

dbSNP: rs727502915; hg19: chr11-119158582;