NM_144991.3:c.1979T>G

Variant names:

Variant summary

Our verdict is Likely benign. The variant received -5 ACMG points: 0P and 5B. BP4_StrongBP6

The NM_144991.3(TSPEAR):c.1979T>G(p.Leu660Arg) variant causes a missense change. The variant allele was found at a frequency of 0.0000779 in 1,578,904 control chromosomes in the GnomAD database, with no homozygous occurrence. In-silico tool predicts a benign outcome for this variant. Variant has been reported in ClinVar as Conflicting classifications of pathogenicity (no stars).

Frequency

Genomes: 𝑓 0.00047 ( 0 hom., cov: 33)

Exomes 𝑓: 0.000036 ( 0 hom. )

Consequence

TSPEAR
NM_144991.3 missense

Scores

Clinical Significance

Conflicting classifications of pathogenicity criteria provided, conflicting classifications U:2B:1

Conservation

PhyloP100: 4.33

Publications

1 publications found

Variant links:

Genes affected

TSPEAR (HGNC:1268): (thrombospondin type laminin G domain and EAR repeats) This gene encodes a protein that contains a N-terminal thrombospondin-type laminin G domain and several tandem arranged epilepsy-associated repeats (EARs). A mutation in this gene is the cause of autosomal recessive deafness-98. Alternate splicing results in multiple transcript variants. [provided by RefSeq, Dec 2012]

TSPEAR Gene-Disease associations (from GenCC):

ectodermal dysplasia 14, hair/tooth type with or without hypohidrosis
Inheritance: AR Classification: STRONG, MODERATE Submitted by: Labcorp Genetics (formerly Invitae), Ambry Genetics
hearing loss, autosomal recessive
Inheritance: AR Classification: SUPPORTIVE Submitted by: Orphanet
autosomal recessive nonsyndromic hearing loss 98
Inheritance: AR Classification: LIMITED, NO_KNOWN Submitted by: Labcorp Genetics (formerly Invitae), Ambry Genetics, PanelApp Australia
nonsyndromic genetic hearing loss
Inheritance: AR Classification: NO_KNOWN Submitted by: ClinGen

TSPEAR links:

Genome browser will be placed here

ACMG classification

Classification was made for transcript

Our verdict: Likely_benign. The variant received -5 ACMG points.

BP4

Computational evidence support a benign effect (MetaRNN=0.015064806).

BP6

Variant 21-44499814-A-C is Benign according to our data. Variant chr21-44499814-A-C is described in ClinVar as [Conflicting_classifications_of_pathogenicity]. Clinvar id is 1186484.We mark this variant Likely_benign, oryginal submissions are: {Uncertain_significance=2, Likely_benign=1}.

Transcripts

RefSeq

Gene	Transcript	HGVSc	HGVSp	Effect	Exon rank	MANE	Protein	UniProt
TSPEAR	NM_144991.3 link	c.1979T>G	p.Leu660Arg	missense_variant	Exon 12 of 12	ENST00000323084.9	NP_659428.2	Q8WU66-1
TSPEAR	NM_001272037.2 link	c.1775T>G	p.Leu592Arg	missense_variant	Exon 13 of 13		NP_001258966.1	Q8WU66

Ensembl

Gene	Transcript	HGVSc	HGVSp	Effect	Exon rank	TSL	MANE	Protein	UniProt
TSPEAR	ENST00000323084.9 link	c.1979T>G	p.Leu660Arg	missense_variant	Exon 12 of 12	1	NM_144991.3	ENSP00000321987.4	Q8WU66-1
TSPEAR	ENST00000642437.1 link	n.*1924T>G		non_coding_transcript_exon_variant	Exon 13 of 13			ENSP00000496535.1	A0A2R8YFK6
TSPEAR	ENST00000642437.1 link	n.*1924T>G		3_prime_UTR_variant	Exon 13 of 13			ENSP00000496535.1	A0A2R8YFK6

Frequencies

GnomAD3 genomes

AF:

0.000447

AC:

AN:

152122

Hom.:

Cov.:

show subpopulations

Gnomad AFR

AF:

0.00152

Gnomad AMI

AF:

0.00

Gnomad AMR

AF:

0.000196

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:

0.000478

GnomAD2 exomes

AF:

0.0000992

AC:

AN:

191516

AF XY:

0.0000774

show subpopulations

Gnomad AFR exome

AF:

0.00154

Gnomad AMR exome

AF:

0.0000341

Gnomad ASJ exome

AF:

0.00

Gnomad EAS exome

AF:

0.00

Gnomad FIN exome

AF:

0.00

Gnomad NFE exome

AF:

0.0000124

Gnomad OTH exome

AF:

0.00

GnomAD4 exome

AF:

0.0000357

AC:

AN:

1426666

Hom.:

Cov.:

AF XY:

0.0000326

AC XY:

AN XY:

706602

show subpopulations

African (AFR)

AF:

0.00114

AC:

AN:

32510

American (AMR)

AF:

0.0000497

AC:

AN:

40246

Ashkenazi Jewish (ASJ)

AF:

0.00

AC:

AN:

25402

East Asian (EAS)

AF:

0.00

AC:

AN:

37648

South Asian (SAS)

AF:

0.00

AC:

AN:

81390

European-Finnish (FIN)

AF:

0.00

AC:

AN:

49820

Middle Eastern (MID)

AF:

0.00

AC:

AN:

5106

European-Non Finnish (NFE)

AF:

0.00000183

AC:

AN:

1095598

Other (OTH)

AF:

0.000170

AC:

AN:

58946

Allele Balance Distribution

Red line indicates average allele balance

Average allele balance: 0.485

Heterozygous variant carriers

0.00

0.20

0.40

0.60

0.80

0.95

Allele balance

GnomAD4 genome

AF:

0.000473

AC:

AN:

152238

Hom.:

Cov.:

AF XY:

0.000497

AC XY:

AN XY:

74440

show subpopulations

African (AFR)

AF:

0.00161

AC:

AN:

41544

American (AMR)

AF:

0.000196

AC:

AN:

15304

Ashkenazi Jewish (ASJ)

AF:

0.00

AC:

AN:

3468

East Asian (EAS)

AF:

0.00

AC:

AN:

5170

South Asian (SAS)

AF:

0.00

AC:

AN:

4830

European-Finnish (FIN)

AF:

0.00

AC:

AN:

10614

Middle Eastern (MID)

AF:

0.00

AC:

AN:

292

European-Non Finnish (NFE)

AF:

0.0000147

AC:

AN:

67990

Other (OTH)

AF:

0.000473

AC:

AN:

2114

Allele Balance Distribution

Red line indicates average allele balance

Average allele balance: 0.518

Heterozygous variant carriers

0.00

0.20

0.40

0.60

0.80

0.95

Allele balance

Alfa

AF:

0.000317

Hom.:

Bravo

AF:

0.000540

ESP6500AA

AF:

0.00229

AC:

ESP6500EA

AF:

0.00

AC:

ExAC

AF:

0.000100

AC:

Asia WGS

AF:

0.000577

AC:

AN:

3478

ClinVar

Significance: Conflicting classifications of pathogenicity

Submissions summary: Uncertain:2Benign:1

Revision: criteria provided, conflicting classifications

LINK: link

Submissions by phenotype

not provided

Uncertain:1Benign:1

Oct 30, 2020

GeneDx

Significance:Likely benign

Review Status:criteria provided, single submitter

Collection Method:clinical testing

- -

Nov 27, 2023

Labcorp Genetics (formerly Invitae), Labcorp

Significance:Uncertain significance

Review Status:criteria provided, single submitter

Collection Method:clinical testing

This sequence change replaces leucine, which is neutral and non-polar, with arginine, which is basic and polar, at codon 660 of the TSPEAR protein (p.Leu660Arg). This variant is present in population databases (rs140818230, gnomAD 0.2%). This variant has not been reported in the literature in individuals affected with TSPEAR-related conditions. ClinVar contains an entry for this variant (Variation ID: 1186484). Advanced modeling of protein sequence and biophysical properties (such as structural, functional, and spatial information, amino acid conservation, physicochemical variation, residue mobility, and thermodynamic stability) performed at Invitae indicates that this missense variant is not expected to disrupt TSPEAR protein function with a negative predictive value of 80%. 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. -

Inborn genetic diseases

Uncertain:1

Jun 22, 2023

Ambry Genetics

Significance:Uncertain significance

Review Status:criteria provided, single submitter

Collection Method:clinical testing

The c.1979T>G (p.L660R) alteration is located in exon 12 (coding exon 12) of the TSPEAR gene. This alteration results from a T to G substitution at nucleotide position 1979, causing the leucine (L) at amino acid position 660 to be replaced by an arginine (R). 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

0.070

BayesDel_addAF

Benign

-0.49

BayesDel_noAF

Benign

-0.49

CADD

Uncertain

(source)

DANN

Benign

0.97

DEOGEN2

Benign

0.088

T;T

Eigen

Benign

-0.16

Eigen_PC

Benign

-0.063

FATHMM_MKL

Uncertain

0.81

LIST_S2

Benign

0.65

.;T

M_CAP

Benign

0.0068

MetaRNN

Benign

0.015

T;T

MetaSVM

Benign

-1.1

MutationAssessor

Uncertain

2.2

M;M

PhyloP100

4.3

PrimateAI

Uncertain

0.57

PROVEAN

Uncertain

-2.5

.;D

REVEL

Benign

0.091

Sift

Benign

0.15

.;T

Sift4G

Benign

0.091

.;T

Polyphen

0.071

B;B

Vest4

0.31

MVP

0.040

MPC

0.068

ClinPred

0.085

GERP RS

3.2

Varity_R

0.21

gMVP

0.65

Mutation Taster

=67/33

polymorphism

(source)

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

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NM_144991.3:c.1979T>G

Variant summary

Frequency

Consequence

Scores

Clinical Significance

Conservation

Publications

ACMG classification

Transcripts

RefSeq

Ensembl

Frequencies

Age Distribution

Age Distribution

ClinVar

Submissions by phenotype

Computational scores

Splicing

Publications

Other links and lift over