1-175083751-C-A

Variant summary

Our verdict is Uncertain significance. Variant got 0 ACMG points: 2P and 2B. PM2BP4_Moderate

The NM_022093.2(TNN):c.1050C>A(p.Asp350Glu) variant causes a missense, splice region change involving the alteration of a non-conserved nucleotide. The variant allele was found at a frequency of 0.00000137 in 1,461,632 control chromosomes in the GnomAD database, with no homozygous occurrence. In-silico tool predicts a benign outcome for this variant. 18/23 in silico tools predict a benign outcome for this variant. 3/3 splice prediction tools predict no significant impact on normal splicing. Variant has been reported in ClinVar as Uncertain significance (★).

Frequency

Genomes: not found (cov: 32)

Exomes 𝑓: 0.0000014 ( 0 hom. )

Consequence

TNN
NM_022093.2 missense, splice_region

Scores

Splicing: ADA: 0.0002307

Clinical Significance

Uncertain significance criteria provided, single submitter U:1

Conservation

PhyloP100: 0.101

Variant links:

Genes affected

TNN (HGNC:22942): (tenascin N) Predicted to enable integrin binding activity. Predicted to be involved in several processes, including generation of neurons; negative regulation of canonical Wnt signaling pathway involved in osteoblast differentiation; and negative regulation of osteoblast differentiation. Predicted to act upstream of or within axonogenesis. Predicted to be located in extracellular matrix and neuron projection. Predicted to be active in collagen-containing extracellular matrix and extracellular space. [provided by Alliance of Genome Resources, Apr 2022]

TNN links:

Genome browser will be placed here

ACMG classification

Classification made for transcript

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=0.09833816).

Transcripts

RefSeq

Gene	Transcript	HGVSc	HGVSp	Effect	#exon/exons	MANE
TNN	NM_022093.2 linkuse as main transcript	c.1050C>A	p.Asp350Glu	missense_variant, splice_region_variant	5/19	ENST00000239462.9
TNN	XM_017002048.2 linkuse as main transcript	c.1104C>A	p.Asp368Glu	missense_variant, splice_region_variant	5/19
TNN	XM_017002049.2 linkuse as main transcript	c.1104C>A	p.Asp368Glu	missense_variant, splice_region_variant	5/18

Ensembl

Gene	Transcript	HGVSc	HGVSp	Effect	#exon/exons	TSL	MANE	Appris	UniProt
TNN	ENST00000239462.9 linkuse as main transcript	c.1050C>A	p.Asp350Glu	missense_variant, splice_region_variant	5/19	2	NM_022093.2	P1
TNN	ENST00000621086.1 linkuse as main transcript	c.1050C>A	p.Asp350Glu	missense_variant, splice_region_variant	4/16	5

Frequencies

GnomAD3 genomes

Cov.:

GnomAD3 exomes

AF:

0.00000399

AC:

AN:

250846

Hom.:

AF XY:

0.00000738

AC XY:

AN XY:

135572

show subpopulations

Gnomad AFR exome

AF:

0.00

Gnomad AMR exome

AF:

0.00

Gnomad ASJ exome

AF:

0.00

Gnomad EAS exome

AF:

0.0000544

Gnomad SAS exome

AF:

0.00

Gnomad FIN exome

AF:

0.00

Gnomad NFE exome

AF:

0.00

Gnomad OTH exome

AF:

0.00

GnomAD4 exome

AF:

0.00000137

AC:

AN:

1461632

Hom.:

Cov.:

AF XY:

0.00000275

AC XY:

AN XY:

727124

show subpopulations

Gnomad4 AFR exome

AF:

0.00

Gnomad4 AMR exome

AF:

0.00

Gnomad4 ASJ exome

AF:

0.00

Gnomad4 EAS exome

AF:

0.0000252

Gnomad4 SAS exome

AF:

0.00

Gnomad4 FIN exome

AF:

0.00

Gnomad4 NFE exome

AF:

0.00

Gnomad4 OTH exome

AF:

0.0000166

GnomAD4 genome

Cov.:

ExAC

AF:

0.00000824

AC:

ClinVar

Significance: Uncertain significance

Submissions summary: Uncertain:1

Revision: criteria provided, single submitter

LINK: link

Submissions by phenotype

not specified

Uncertain:1

Uncertain significance, criteria provided, single submitter

clinical testing

Ambry Genetics

Jan 30, 2024

The c.1050C>A (p.D350E) alteration is located in exon 5 (coding exon 4) of the TNN gene. This alteration results from a C to A substitution at nucleotide position 1050, causing the aspartic acid (D) at amino acid position 350 to be replaced by a glutamic acid (E). 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

0.16

BayesDel_addAF

Benign

-0.30

BayesDel_noAF

Benign

-0.50

Cadd

Benign

6.6

Dann

Benign

0.88

DEOGEN2

Benign

0.00028

T;.;.

Eigen

Benign

-0.82

Eigen_PC

Benign

-0.74

FATHMM_MKL

Benign

0.26

LIST_S2

Benign

0.60

T;T;T

M_CAP

Benign

0.011

MetaRNN

Benign

0.098

T;T;T

MetaSVM

Benign

-0.99

MutationAssessor

Benign

1.4

L;.;.

MutationTaster

Benign

1.0

PrimateAI

Benign

0.48

PROVEAN

Benign

-1.1

N;.;.

REVEL

Benign

0.079

Sift

Benign

0.25

T;.;.

Sift4G

Benign

0.40

T;T;T

Polyphen

0.0020

B;.;.

Vest4

0.22

MutPred

0.33

Gain of loop (P = 0.1069);Gain of loop (P = 0.1069);Gain of loop (P = 0.1069);

MVP

0.57

MPC

0.098

ClinPred

0.19

GERP RS

2.1

Varity_R

0.052

gMVP

0.26

Splicing

Name

Calibrated prediction

Score

Prediction

dbscSNV1_ADA

Benign

0.00023

dbscSNV1_RF

Benign

0.0

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

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