chr7-116795901-T-A

Position:

• chr7-116795901-T-A

Variant summary

Our verdict is Uncertain significance. Variant got 5 ACMG points: 5P and 0B. PM1 PM2 PP3

The NM_000245.4(MET):​c.3950T>A​(p.Leu1317Gln) variant causes a missense change involving the alteration of a conserved nucleotide. The variant allele was found at a frequency of 0.00000657 in 152,236 control chromosomes in the GnomAD database, with no homozygous occurrence. In-silico tool predicts a pathogenic outcome for this variant. Variant has been reported in ClinVar as Uncertain significance (★★).

• Frequency: Genomes: 𝑓 0.0000066 (0 hom., cov: 32)
• Consequence: MET NM_000245.4 missense
• Clinical Significance: Uncertain significance criteria provided, multiple submitters, no conflicts U:3
• Conservation: PhyloP100: 7.67

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 5 ACMG points.

• PM1: In a domain Protein kinase (size 267) in uniprot entity MET_HUMAN there are 21 pathogenic changes around while only 1 benign (95%) in NM_000245.4
• PM2: Very rare variant in population databases, with high coverage
• PP3: MetaRNN computational evidence supports a deleterious effect, 0.821

Transcripts

RefSeq

Gene	Transcript	HGVSc	HGVSp	Effect	#exon/exons	MANE	Protein	UniProt
MET	NM_000245.4	c.3950T>A	p.Leu1317Gln	missense_variant	21/21	ENST00000397752.8	NP_000236.2
MET	NM_001127500.3	c.4004T>A	p.Leu1335Gln	missense_variant	21/21		NP_001120972.1
MET	NM_001324402.2	c.2660T>A	p.Leu887Gln	missense_variant	20/20		NP_001311331.1
MET	XM_011516223.2	c.4007T>A	p.Leu1336Gln	missense_variant	22/22		XP_011514525.1

Ensembl

Gene	Transcript	HGVSc	HGVSp	Effect	#exon/exons	TSL	MANE	Protein	Appris	UniProt
MET	ENST00000397752.8	c.3950T>A	p.Leu1317Gln	missense_variant	21/21	1	NM_000245.4	ENSP00000380860.3
MET	ENST00000318493.11	c.4004T>A	p.Leu1335Gln	missense_variant	21/21	1		ENSP00000317272.6
MET	ENST00000436117.3	n.*1555T>A		non_coding_transcript_exon_variant	20/20	1		ENSP00000410980.2
MET	ENST00000436117.3	n.*1555T>A		3_prime_UTR_variant	20/20	1		ENSP00000410980.2

Frequencies

GnomAD3 genomes AF: 0.00000657 AC: 1 AN: 152236 Hom.: 0 Cov.: 32

Gnomad AFR AF: 0.00

Gnomad AMI AF: 0.00

Gnomad AMR AF: 0.00

Gnomad ASJ AF: 0.00

Gnomad EAS AF: 0.00

Gnomad SAS AF: 0.00

Gnomad FIN AF: 0.00

Gnomad MID AF: 0.00

Gnomad NFE AF: 0.0000147

Gnomad OTH AF: 0.00

GnomAD4 exome Cov.: 61

GnomAD4 genome AF: 0.00000657 AC: 1 AN: 152236 Hom.: 0 Cov.: 32 AF XY: 0.0000134 AC XY: 1 AN XY: 74378

Gnomad4 AFR AF: 0.00

Gnomad4 AMR AF: 0.00

Gnomad4 ASJ AF: 0.00

Gnomad4 EAS AF: 0.00

Gnomad4 SAS AF: 0.00

Gnomad4 FIN AF: 0.00

Gnomad4 NFE AF: 0.0000147

Gnomad4 OTH AF: 0.00

Alfa AF: 0.0000712 Hom.: 0

Bravo AF: 0.00000378

ClinVar

Significance: Uncertain significance

Submissions summary: Uncertain:3

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

Feb 02, 2017

In summary, this variant is a novel missense change with uncertain impact on protein function. 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 is not present in population databases (ExAC no frequency) and has not been reported in the literature in individuals with a MET-related disease. This sequence change replaces leucine with glutamine at codon 1335 of the MET protein (p.Leu1335Gln). The leucine residue is moderately conserved and there is a moderate physicochemical difference between leucine and glutamine. -

not provided Uncertain:1

Uncertain significance, criteria provided, single submitter

clinical testing

GeneDx

Feb 20, 2024

Not observed at a significant frequency in large population cohorts (gnomAD); In silico analysis supports that this missense variant has a deleterious effect on protein structure/function; Has not been previously published as pathogenic or benign to our knowledge -

Hereditary cancer-predisposing syndrome Uncertain:1

Uncertain significance, criteria provided, single submitter

clinical testing

Ambry Genetics

Dec 03, 2024

The p.L1335Q variant (also known as c.4004T>A), located in coding exon 20 of the MET gene, results from a T to A substitution at nucleotide position 4004. The leucine at codon 1335 is replaced by glutamine, an amino acid with dissimilar properties. This amino acid position is well conserved in available vertebrate species. In addition, this alteration is predicted to be deleterious by in silico analysis. Based on the available evidence, the clinical significance of this variant remains unclear. -

Computational scores

Source: dbNSFP v4.3

Name	Calibrated prediction	Score	Prediction
AlphaMissense	Benign	0.24
BayesDel_addAF	Pathogenic	0.40	D
BayesDel_noAF	Pathogenic	0.34
CADD	Pathogenic	27
DANN	Benign	0.94
DEOGEN2	Uncertain	0.79	D;.
Eigen	Uncertain	0.53
Eigen_PC	Uncertain	0.60
FATHMM_MKL	Pathogenic	0.99	D
LIST_S2	Uncertain	0.94	D;D
M_CAP	Uncertain	0.15	D
MetaRNN	Pathogenic	0.82	D;D
MetaSVM	Uncertain	0.14	D
MutationAssessor	Benign	1.7	L;.
PrimateAI	Pathogenic	0.79	T
PROVEAN	Uncertain	-2.9	D;D
REVEL	Pathogenic	0.78
Sift	Uncertain	0.0010	D;D
Sift4G	Benign	0.078	T;T
Polyphen		1.0	D;P
Vest4		0.84
MutPred		0.65		Loss of stability (P = 0.0598);.;
MVP		0.92
MPC		1.9
ClinPred		0.95	D
GERP RS		5.7
Varity_R		0.89
gMVP		0.75

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: rs1159812687; hg19: chr7-116435955;