9-115021162-C-A

Variant names:

• chr9-115021162-C-A
• rs868055775
• NM_002160.4:c.6601G>T

Variant summary

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

The NM_002160.4(TNC):​c.6601G>T​(p.Ala2201Ser) variant causes a missense change. The variant was absent in control chromosomes in GnomAD project. 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)
• Consequence: TNC NM_002160.4 missense
• Clinical Significance: Uncertain significance criteria provided, single submitter U:1
• Conservation: PhyloP100: 4.85

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]

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]

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=0.09360981).

Transcripts

RefSeq

Gene	Transcript	HGVSc	HGVSp	Effect	Exon rank	MANE	Protein	UniProt
TNC	NM_002160.4	c.6601G>T	p.Ala2201Ser	missense_variant	Exon 28 of 28	ENST00000350763.9	NP_002151.2

Ensembl

Gene	Transcript	HGVSc	HGVSp	Effect	Exon rank	TSL	MANE	Protein	Appris	UniProt
TNC	ENST00000350763.9	c.6601G>T	p.Ala2201Ser	missense_variant	Exon 28 of 28	1	NM_002160.4	ENSP00000265131.4

Frequencies

GnomAD3 genomes Cov.: 32

GnomAD3 exomes AF: 0.00000398 AC: 1 AN: 251094 Hom.: 0 AF XY: 0.00 AC XY: 0 AN XY: 135704

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: 0.00

Gnomad FIN exome AF: 0.00

Gnomad NFE exome AF: 0.00000880

Gnomad OTH exome AF: 0.00

GnomAD4 exome Cov.: 30

GnomAD4 genome Cov.: 32

ClinVar

Significance: Uncertain significance

Submissions summary: Uncertain:1

Revision: criteria provided, single submitter

Submissions by phenotype

not specified Uncertain:1

Sep 27, 2021

Ambry Genetics

Significance: Uncertain significance

Review Status: criteria provided, single submitter

Collection Method: clinical testing

The c.6601G>T (p.A2201S) alteration is located in exon 28 (coding exon 27) of the TNC gene. This alteration results from a G to T substitution at nucleotide position 6601, causing the alanine (A) at amino acid position 2201 to be replaced by a serine (S). Based on insufficient or conflicting evidence, the clinical significance of this alteration remains unclear. -

Computational scores

Source: dbNSFP v4.3

Name	Calibrated prediction	Score	Prediction
AlphaMissense	Benign	0.12
BayesDel_addAF	Benign	-0.17	T
BayesDel_noAF	Benign	-0.47
CADD	Benign	19
DANN	Benign	0.63
DEOGEN2	Benign	0.22	.;T;.;T;.;.
Eigen	Benign	-0.30
Eigen_PC	Benign	-0.087
FATHMM_MKL	Uncertain	0.93	D
LIST_S2	Uncertain	0.93	D;D;D;D;D;.
M_CAP	Benign	0.0077	T
MetaRNN	Benign	0.094	T;T;T;T;T;T
MetaSVM	Benign	-0.98	T
MutationAssessor	Benign	-2.0	.;N;.;.;.;.
PrimateAI	Uncertain	0.54	T
PROVEAN	Benign	-0.78	.;N;N;N;N;N
REVEL	Benign	0.11
Sift	Benign	0.19	.;T;T;T;T;T
Sift4G	Benign	1.0	T;T;T;T;T;T
Polyphen		0.36	.;B;.;B;.;.
Vest4		0.18
MutPred		0.21		.;Gain of phosphorylation at A2201 (P = 4e-04);.;.;.;.;
MVP		0.44
MPC		0.16
ClinPred		0.31	T
GERP RS		4.4
Varity_R		0.087
gMVP		0.14

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: rs868055775; hg19: chr9-117783441;