7-116741000-A-G

Position:

• chr7-116741000-A-G

Variant summary

Our verdict is Uncertain significance. Variant got 0 ACMG points: 2P and 2B. PM2 BP4_Moderate

The NM_000245.4(MET):​c.1676A>G​(p.Gln559Arg) variant causes a missense change. The variant allele was found at a frequency of 0.00000342 in 1,461,844 control chromosomes in the GnomAD database, with no homozygous occurrence. In-silico tool predicts a benign outcome for this variant. 13/21 in silico tools predict a benign outcome for this variant. Variant has been reported in ClinVar as Uncertain significance (★★).

• Frequency:
  • Genomes: not found (cov: 32)
  • Exomes 𝑓: 0.0000034 (0 hom.)
• Consequence: MET NM_000245.4 missense
• Clinical Significance: Uncertain significance criteria provided, multiple submitters, no conflicts U:2
• Conservation: PhyloP100: 6.69

Genes affected

MET (HGNC:7029): (MET proto-oncogene, receptor tyrosine kinase) This gene encodes a member of the receptor tyrosine kinase family of proteins and the product of the proto-oncogene MET. The encoded preproprotein is proteolytically processed to generate alpha and beta subunits that are linked via disulfide bonds to form the mature receptor. Further processing of the beta subunit results in the formation of the M10 peptide, which has been shown to reduce lung fibrosis. Binding of its ligand, hepatocyte growth factor, induces dimerization and activation of the receptor, which plays a role in cellular survival, embryogenesis, and cellular migration and invasion. Mutations in this gene are associated with papillary renal cell carcinoma, hepatocellular carcinoma, and various head and neck cancers. Amplification and overexpression of this gene are also associated with multiple human cancers. [provided by RefSeq, May 2016]

ACMG classification

Verdict is Uncertain_significance. Variant got 0 ACMG points.

• PM2: Very rare variant in population databases, with high coverage
• BP4: Computational evidence support a benign effect (MetaRNN=0.2168642).

Transcripts

RefSeq

Gene	Transcript	HGVSc	HGVSp	Effect	#exon/exons	MANE	Protein	UniProt
MET	NM_000245.4	c.1676A>G	p.Gln559Arg	missense_variant	5/21	ENST00000397752.8	NP_000236.2

Ensembl

Gene	Transcript	HGVSc	HGVSp	Effect	#exon/exons	TSL	MANE	Protein	Appris	UniProt
MET	ENST00000397752.8	c.1676A>G	p.Gln559Arg	missense_variant	5/21	1	NM_000245.4	ENSP00000380860	P3

Frequencies

GnomAD3 genomes Cov.: 32

GnomAD4 exome AF: 0.00000342 AC: 5 AN: 1461844 Hom.: 0 Cov.: 33 AF XY: 0.00000275 AC XY: 2 AN XY: 727220

Gnomad4 AFR exome AF: 0.00

Gnomad4 AMR exome AF: 0.00

Gnomad4 ASJ exome AF: 0.00

Gnomad4 EAS exome AF: 0.00

Gnomad4 SAS exome AF: 0.00

Gnomad4 FIN exome AF: 0.00

Gnomad4 NFE exome AF: 0.00000360

Gnomad4 OTH exome AF: 0.0000166

GnomAD4 genome Cov.: 32

ClinVar

Significance: Uncertain significance

Submissions summary: Uncertain:2

Revision: criteria provided, multiple submitters, no conflicts

Submissions by phenotype

Renal cell carcinoma Uncertain:1

Uncertain significance, criteria provided, single submitter

clinical testing

Labcorp Genetics (formerly Invitae), Labcorp

Nov 27, 2022

This sequence change replaces glutamine, which is neutral and polar, with arginine, which is basic and polar, at codon 559 of the MET protein (p.Gln559Arg). 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. 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 MET protein function. ClinVar contains an entry for this variant (Variation ID: 454194). This missense change has been observed in individual(s) with breast cancer (PMID: 25636233). This variant is not present in population databases (gnomAD no frequency). -

Hereditary cancer-predisposing syndrome Uncertain:1

Uncertain significance, criteria provided, single submitter

clinical testing

Ambry Genetics

Apr 12, 2023

The p.Q559R variant (also known as c.1676A>G), located in coding exon 4 of the MET gene, results from an A to G substitution at nucleotide position 1676. The glutamine at codon 559 is replaced by arginine, an amino acid with highly similar properties. This amino acid position is poorly conserved in available vertebrate species. In addition, this alteration is predicted to be tolerated by in silico analysis. Since supporting evidence is limited at this time, the clinical significance of this alteration remains unclear. -

Computational scores

Source: dbNSFP v4.3

Name	Calibrated prediction	Score	Prediction
AlphaMissense	Benign	0.087
BayesDel_addAF	Benign	-0.26	T
BayesDel_noAF	Benign	-0.62
CADD	Benign	21
DANN	Uncertain	1.0
DEOGEN2	Benign	0.29	T;.;.
Eigen	Benign	-0.14
Eigen_PC	Benign	0.073
FATHMM_MKL	Pathogenic	0.97	D
LIST_S2	Benign	0.84	T;D;D
M_CAP	Benign	0.013	T
MetaRNN	Benign	0.22	T;T;T
MetaSVM	Benign	-1.1	T
MutationAssessor	Benign	0.0	N;N;N
MutationTaster	Benign	0.67	N;N;N
PrimateAI	Benign	0.32	T
PROVEAN	Benign	-1.6	N;N;N
REVEL	Benign	0.18
Sift	Uncertain	0.0050	D;D;D
Sift4G	Uncertain	0.028	D;D;D
Polyphen		0.019	B;B;.
Vest4		0.23
MutPred		0.66		Loss of catalytic residue at C561 (P = 0.3208);Loss of catalytic residue at C561 (P = 0.3208);Loss of catalytic residue at C561 (P = 0.3208);
MVP		0.43
MPC		0.28
ClinPred		0.78	D
GERP RS		5.8
Varity_R		0.68
gMVP		0.61

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: rs45460604; hg19: chr7-116381054;