rs1554395688

Positions:

• chr7-116758524-A-C
• chr7-116758524-A-T

Variant summary

Our verdict is Uncertain significance. Variant got 1 ACMG points: 2P and 1B. PM2 BP4

The NM_000245.4(MET):​c.2168A>C​(p.Lys723Thr) 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. Variant has been reported in ClinVar as Uncertain significance (★). Synonymous variant affecting the same amino acid position (i.e. K723K) has been classified as Likely benign.

• Frequency: Genomes: not found (cov: 32)
• Consequence: MET NM_000245.4 missense
• Clinical Significance: Uncertain significance criteria provided, single submitter U:1
• Conservation: PhyloP100: 2.98

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 1 ACMG points.

• PM2: Very rare variant in population databases, with high coverage
• BP4: Computational evidence support a benign effect (MetaRNN=0.34002972).

Transcripts

RefSeq

Gene	Transcript	HGVSc	HGVSp	Effect	#exon/exons	MANE	UniProt
MET	NM_000245.4	c.2168A>C	p.Lys723Thr	missense_variant	9/21	ENST00000397752.8

Ensembl

Gene	Transcript	HGVSc	HGVSp	Effect	#exon/exons	TSL	MANE	Appris	UniProt
MET	ENST00000397752.8	c.2168A>C	p.Lys723Thr	missense_variant	9/21	1	NM_000245.4	P3
MET	ENST00000318493.11	c.2168A>C	p.Lys723Thr	missense_variant	9/21	1		A2
MET	ENST00000436117.3	c.2168A>C	p.Lys723Thr	missense_variant, NMD_transcript_variant	9/20	1
MET	ENST00000422097.2	c.2168A>C	p.Lys723Thr	missense_variant	9/12	3

Frequencies

GnomAD3 genomes Cov.: 32

GnomAD4 exome Cov.: 31

GnomAD4 genome Cov.: 32

Bravo AF: 0.00000378

ClinVar

Significance: Uncertain significance

Submissions summary: Uncertain:1

Revision: criteria provided, single submitter

Submissions by phenotype

Renal cell carcinoma Uncertain:1

Uncertain significance, criteria provided, single submitter

clinical testing

Labcorp Genetics (formerly Invitae), Labcorp

Nov 13, 2019

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. Algorithms developed to predict the effect of missense changes on protein structure and function do not agree on the potential impact of this missense change (SIFT: "Tolerated"; PolyPhen-2: "Probably Damaging"; Align-GVGD: "Class C0"). This variant has not been reported in the literature in individuals with MET-related disease. This variant is not present in population databases (ExAC no frequency). This sequence change replaces lysine with threonine at codon 723 of the MET protein (p.Lys723Thr). The lysine residue is moderately conserved and there is a moderate physicochemical difference between lysine and threonine. -

Computational scores

Source: dbNSFP v4.3

Name	Calibrated prediction	Score	Prediction
AlphaMissense	Benign	0.090
BayesDel_addAF	Uncertain	0.027	T
BayesDel_noAF	Benign	-0.20
CADD	Benign	23
DANN	Uncertain	1.0
DEOGEN2	Uncertain	0.42	T;.;.;.
Eigen	Uncertain	0.23
Eigen_PC	Uncertain	0.28
FATHMM_MKL	Benign	0.69	D
LIST_S2	Benign	0.84	T;T;T;D
M_CAP	Benign	0.053	D
MetaRNN	Benign	0.34	T;T;T;T
MetaSVM	Uncertain	-0.19	T
MutationAssessor	Benign	1.1	L;L;L;.
MutationTaster	Benign	1.0	N;N;N
PrimateAI	Uncertain	0.55	T
PROVEAN	Benign	-0.62	N;N;N;N
REVEL	Uncertain	0.39
Sift	Benign	0.15	T;T;T;T
Sift4G	Benign	0.43	T;T;D;D
Polyphen		0.98	D;P;.;.
Vest4		0.45
MutPred		0.61		Loss of ubiquitination at K723 (P = 0.0199);Loss of ubiquitination at K723 (P = 0.0199);Loss of ubiquitination at K723 (P = 0.0199);.;
MVP		0.54
MPC		0.98
ClinPred		0.55	D
GERP RS		5.5
Varity_R		0.30
gMVP		0.79

Splicing

Name	Calibrated prediction	Score	Prediction
SpliceAI score (max)		0.050		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: rs1554395688; hg19: chr7-116398578;