rs1060500679

Positions:

• chr11-119285396-C-G
• chr11-119285396-C-T

Variant summary

Our verdict is Likely benign. Variant got -2 ACMG points: 2P and 4B. PM2 BP4_Strong

The NM_005188.4(CBL):​c.1771C>G​(p.Leu591Val) 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. 16/21 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. L591L) has been classified as Likely benign.

• Frequency: Genomes: not found (cov: 32)
• Consequence: CBL NM_005188.4 missense
• Clinical Significance: Uncertain significance criteria provided, single submitter U:2
• Conservation: PhyloP100: 1.28

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]

ACMG classification

Verdict is Likely_benign. Variant got -2 ACMG points.

• PM2: Very rare variant in population databases, with high coverage
• BP4: Computational evidence support a benign effect (MetaRNN=0.06343439).

Transcripts

RefSeq

Gene	Transcript	HGVSc	HGVSp	Effect	#exon/exons	MANE	UniProt
CBL	NM_005188.4	c.1771C>G	p.Leu591Val	missense_variant	11/16	ENST00000264033.6

Ensembl

Gene	Transcript	HGVSc	HGVSp	Effect	#exon/exons	TSL	MANE	Appris	UniProt
CBL	ENST00000264033.6	c.1771C>G	p.Leu591Val	missense_variant	11/16	1	NM_005188.4	P2

Frequencies

GnomAD3 genomes Cov.: 32

GnomAD4 exome Cov.: 33

GnomAD4 genome Cov.: 32

ClinVar

Significance: Uncertain significance

Submissions summary: Uncertain:2

Revision: criteria provided, single submitter

Submissions by phenotype

not provided Uncertain:1

Uncertain significance, no assertion criteria provided

provider interpretation

Stanford Center for Inherited Cardiovascular Disease, Stanford University

Aug 31, 2016

- -

RASopathy Uncertain:1

Uncertain significance, criteria provided, single submitter

clinical testing

Invitae

May 16, 2016

In summary, this variant is a novel missense change that is not predicted to affect protein function. There is no indication that it causes disease, but the available evidence is currently insufficient to prove that conclusively. Therefore, it has been classified as a Variant of Uncertain Significance. This variant is not present in population databases (ExAC no frequency) and has not been reported in the literature in individuals with a CBL-related disease. Algorithms developed to predict the effect of missense changes on protein structure and function (SIFT, PolyPhen-2, Align-GVGD) all suggest that this variant is likely to be tolerated, but these predictions have not been confirmed by published functional studies. This sequence change replaces leucine with valine at codon 591 of the CBL protein (p.Leu591Val). The leucine residue is weakly conserved and there is a small physicochemical difference between leucine and valine. -

Computational scores

Source: dbNSFP v4.3

Name	Calibrated prediction	Score	Prediction
AlphaMissense	Benign	0.068
BayesDel_addAF	Benign	-0.097	T
BayesDel_noAF	Benign	-0.38
CADD	Benign	12
DANN	Benign	0.88
DEOGEN2	Benign	0.33	T;.;T;.
Eigen	Benign	-0.61
Eigen_PC	Benign	-0.44
FATHMM_MKL	Uncertain	0.82	D
LIST_S2	Uncertain	0.89	D;D;D;D
M_CAP	Benign	0.024	T
MetaRNN	Benign	0.063	T;T;T;T
MetaSVM	Benign	-0.88	T
MutationAssessor	Benign	1.7	L;.;.;.
MutationTaster	Benign	0.86	D
PrimateAI	Benign	0.33	T
PROVEAN	Benign	0.16	N;.;.;.
REVEL	Benign	0.19
Sift	Benign	1.0	T;.;.;.
Sift4G	Benign	0.50	T;T;T;.
Polyphen		0.085	B;.;.;.
Vest4		0.23
MutPred		0.14		Loss of catalytic residue at L591 (P = 0.0922);Loss of catalytic residue at L591 (P = 0.0922);.;.;
MVP		0.66
MPC		0.21
ClinPred		0.14	T
GERP RS		1.8
RBP_binding_hub_radar		0.0
RBP_regulation_power_radar		1.7
Varity_R		0.027
gMVP		0.10

Splicing

Name	Calibrated prediction	Score	Prediction
SpliceAI score (max)		0.0		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

Other links and lift over

dbSNP: rs1060500679; hg19: chr11-119156106;