9-115023974-T-C

Position:

chr9-115023974-T-C

Variant summary

Our verdict is Likely benign. Variant got -4 ACMG points: 0P and 4B. BS2

The NM_002160.4(TNC):c.6494A>G(p.Gln2165Arg) variant causes a missense, splice region change. The variant allele was found at a frequency of 0.000108 in 1,613,478 control chromosomes in the GnomAD database, with no homozygous occurrence. In-silico tool predicts a benign outcome for this variant. 2/3 splice prediction tools predicting alterations to normal splicing. Variant has been reported in ClinVar as Uncertain significance (★★).

Frequency

Genomes: 𝑓 0.000072 ( 0 hom., cov: 32)

Exomes 𝑓: 0.00011 ( 0 hom. )

Consequence

TNC
NM_002160.4 missense, splice_region

Scores

Splicing: ADA: 0.9935

Clinical Significance

Uncertain significance criteria provided, multiple submitters, no conflicts U:2

Conservation

PhyloP100: 6.20

Variant links:

Genes affected

TNC (HGNC:5318): (tenascin C) This gene encodes an extracellular matrix protein with a spatially and temporally restricted tissue distribution. This protein is homohexameric with disulfide-linked subunits, and contains multiple EGF-like and fibronectin type-III domains. It is implicated in guidance of migrating neurons as well as axons during development, synaptic plasticity, and neuronal regeneration. [provided by RefSeq, Jul 2011]

TNC links:

DELEC1 (HGNC:23658): (deleted in esophageal cancer 1) The function of this gene is not known. This gene is located in a region commonly deleted in esophageal squamous cell carcinomas. Gene expression is reduced or absent in these carcinomas and thus this is a candidate tumor suppressor gene for esophageal squamous cell carcinomas. [provided by RefSeq, Jul 2008]

DELEC1 links:

Genome browser will be placed here

ACMG classification

Classification made for transcript

Verdict is Likely_benign. Variant got -4 ACMG points.

BS2

High AC in GnomAd4 at 11 AD gene.

Transcripts

RefSeq

Gene	Transcript	HGVSc	HGVSp	Effect	#exon/exons	MANE	UniProt
TNC	NM_002160.4 linkuse as main transcript	c.6494A>G	p.Gln2165Arg	missense_variant, splice_region_variant	27/28	ENST00000350763.9

Ensembl

Gene	Transcript	HGVSc	HGVSp	Effect	#exon/exons	TSL	MANE	Appris	UniProt
TNC	ENST00000350763.9 linkuse as main transcript	c.6494A>G	p.Gln2165Arg	missense_variant, splice_region_variant	27/28	1	NM_002160.4	P1	P24821-1
DELEC1	ENST00000649121.1 linkuse as main transcript	n.78+54313T>C		intron_variant, non_coding_transcript_variant

Frequencies

GnomAD3 genomes

AF:

0.0000657

AC:

AN:

152234

Hom.:

Cov.:

show subpopulations

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:

0.000827

Gnomad FIN

AF:

0.00

Gnomad MID

AF:

0.00

Gnomad NFE

AF:

0.0000735

Gnomad OTH

AF:

0.000478

GnomAD3 exomes

AF:

0.000207

AC:

AN:

250754

Hom.:

AF XY:

0.000295

AC XY:

AN XY:

135438

show subpopulations

Gnomad AFR exome

AF:

0.00

Gnomad AMR exome

AF:

0.00

Gnomad ASJ exome

AF:

0.00

Gnomad EAS exome

AF:

0.00

Gnomad SAS exome

AF:

0.00144

Gnomad FIN exome

AF:

0.00

Gnomad NFE exome

AF:

0.0000707

Gnomad OTH exome

AF:

0.00

GnomAD4 exome

AF:

0.000112

AC:

164

AN:

1461126

Hom.:

Cov.:

AF XY:

0.000155

AC XY:

113

AN XY:

726774

show subpopulations

Gnomad4 AFR exome

AF:

0.00

Gnomad4 AMR exome

AF:

0.0000447

Gnomad4 ASJ exome

AF:

0.00

Gnomad4 EAS exome

AF:

0.00

Gnomad4 SAS exome

AF:

0.00130

Gnomad4 FIN exome

AF:

0.00

Gnomad4 NFE exome

AF:

0.0000351

Gnomad4 OTH exome

AF:

0.000116

GnomAD4 genome

AF:

0.0000722

AC:

AN:

152352

Hom.:

Cov.:

AF XY:

0.0000671

AC XY:

AN XY:

74510

show subpopulations

Gnomad4 AFR

AF:

0.00

Gnomad4 AMR

AF:

0.00

Gnomad4 ASJ

AF:

0.00

Gnomad4 EAS

AF:

0.00

Gnomad4 SAS

AF:

0.000828

Gnomad4 FIN

AF:

0.00

Gnomad4 NFE

AF:

0.0000735

Gnomad4 OTH

AF:

0.000473

Alfa

AF:

0.0000634

Hom.:

Bravo

AF:

0.0000529

ESP6500AA

AF:

0.00

AC:

ESP6500EA

AF:

0.000233

AC:

ExAC

AF:

0.000198

AC:

EpiCase

AF:

0.000218

EpiControl

AF:

0.000119

ClinVar

Significance: Uncertain significance

Submissions summary: Uncertain:2

Revision: criteria provided, multiple submitters, no conflicts

LINK: link

Submissions by phenotype

not specified

Uncertain:1

Uncertain significance, criteria provided, single submitter

clinical testing

Women's Health and Genetics/Laboratory Corporation of America, LabCorp

Oct 16, 2023

Variant summary: TNC c.6494A>G (p.Gln2165Arg) results in a conservative amino acid change located in the Fibrinogen, alpha/beta/gamma chain, C-terminal globular domain (IPR002181) of the encoded protein sequence. Four of five in-silico tools predict a damaging effect of the variant on protein function. The variant alters the second to last nucleotide of exon 27 adjacent to the intron 27 splice donor site. Consensus agreement among computation tools predict no significant impact on normal splicing. However, these predictions have yet to be confirmed by functional studies. The variant allele was found at a frequency of 0.00021 in 250754 control chromosomes, predominantly at a frequency of 0.0014 within the South Asian subpopulation in the gnomAD database. To our knowledge, no occurrence of c.6494A>G in individuals affected with Deafness, Autosomal Dominant 56 and no experimental evidence demonstrating its impact on protein function have been reported. One submitter has cited clinical-significance assessments for this variant to ClinVar after 2014 and has classified the variant as uncertain significance. Based on the evidence outlined above, the variant was classified as VUS-possibly benign. -

Autosomal dominant nonsyndromic hearing loss 56

Uncertain:1

Uncertain significance, criteria provided, single submitter

clinical testing

Laboratory of Medical Genetics, National & Kapodistrian University of Athens

Mar 05, 2018

PP3 -

Computational scores

Source: dbNSFP v4.3

Name

Calibrated prediction

Score

Prediction

AlphaMissense

Benign

0.27

BayesDel_addAF

Benign

-0.16

BayesDel_noAF

Uncertain

-0.040

CADD

Pathogenic

DANN

Uncertain

1.0

DEOGEN2

Benign

0.30

.;T;.;T;.;.

Eigen

Uncertain

0.52

Eigen_PC

Uncertain

0.57

FATHMM_MKL

Pathogenic

0.97

LIST_S2

Uncertain

0.91

D;D;D;D;D;.

M_CAP

Benign

0.050

MetaRNN

Benign

0.15

T;T;T;T;T;T

MetaSVM

Uncertain

0.020

MutationAssessor

Benign

1.1

.;L;.;.;.;.

MutationTaster

Benign

1.0

D;D;D;D;D;D;D;D;D

PrimateAI

Uncertain

0.53

PROVEAN

Benign

-1.9

.;N;N;N;N;N

REVEL

Uncertain

0.54

Sift

Benign

0.033

.;D;T;T;D;T

Sift4G

Uncertain

0.016

D;D;D;D;D;D

Polyphen

0.80, 0.89

.;P;.;P;.;.

Vest4

0.40

MVP

0.81

MPC

0.69

ClinPred

0.13

GERP RS

5.5

Varity_R

0.76

gMVP

0.72

Splicing

Name

Calibrated prediction

Score

Prediction

dbscSNV1_ADA

Pathogenic

0.99

dbscSNV1_RF

Pathogenic

0.92

SpliceAI score (max)

0.030

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

Below is the list of publications found by LitVar. It may be empty.

Variant summary

Frequency

Consequence

Scores

Clinical Significance

Conservation

ACMG classification

Transcripts

RefSeq

Ensembl

Frequencies

ClinVar

Submissions by phenotype

Computational scores

Splicing

Publications

LitVar

Other links and lift over