21-44504857-C-T

Variant names:

Variant summary

Our verdict is Benign. The variant received -21 ACMG points: 0P and 21B. BP4_StrongBP6_Very_StrongBP7BS1BS2

The NM_144991.3(TSPEAR):c.1779G>A(p.Ser593Ser) variant causes a synonymous change involving the alteration of a non-conserved nucleotide. The variant allele was found at a frequency of 0.000762 in 1,613,772 control chromosomes in the GnomAD database, including 10 homozygotes. In-silico tool predicts a benign outcome for this variant. Variant has been reported in ClinVar as Benign (★★).

Frequency

Genomes: 𝑓 0.0043 ( 6 hom., cov: 30)

Exomes 𝑓: 0.00040 ( 4 hom. )

Consequence

TSPEAR
NM_144991.3 synonymous

Scores

Clinical Significance

Benign criteria provided, multiple submitters, no conflicts B:3

Conservation

PhyloP100: -6.85

Publications

0 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: Benign. The variant received -21 ACMG points.

BP4

Computational evidence support a benign effect (BayesDel_noAF=-0.64).

BP6

Variant 21-44504857-C-T is Benign according to our data. Variant chr21-44504857-C-T is described in ClinVar as [Benign]. Clinvar id is 227133.Status of the report is criteria_provided_multiple_submitters_no_conflicts, 2 stars.

BP7

Synonymous conserved (PhyloP=-6.85 with no splicing effect.

BS1

Variant frequency is greater than expected in population afr. GnomAd4 allele frequency = 0.00427 (649/152104) while in subpopulation AFR AF = 0.0149 (616/41442). AF 95% confidence interval is 0.0139. There are 6 homozygotes in GnomAd4. There are 291 alleles in the male GnomAd4 subpopulation. Median coverage is 30. This position passed quality control check.

BS2

High Homozygotes in GnomAd4 at 6 AR gene

Transcripts

RefSeq

Gene	Transcript	HGVSc	HGVSp	Effect	Exon rank	MANE	Protein	UniProt
TSPEAR	NM_144991.3 link	c.1779G>A	p.Ser593Ser	synonymous_variant	Exon 11 of 12	ENST00000323084.9	NP_659428.2	Q8WU66-1
TSPEAR	NM_001272037.2 link	c.1575G>A	p.Ser525Ser	synonymous_variant	Exon 12 of 13		NP_001258966.1	Q8WU66

Ensembl

Gene	Transcript	HGVSc	HGVSp	Effect	Exon rank	TSL	MANE	Protein	UniProt
TSPEAR	ENST00000323084.9 link	c.1779G>A	p.Ser593Ser	synonymous_variant	Exon 11 of 12	1	NM_144991.3	ENSP00000321987.4	Q8WU66-1
TSPEAR	ENST00000642437.1 link	n.*1724G>A		non_coding_transcript_exon_variant	Exon 12 of 13			ENSP00000496535.1	A0A2R8YFK6
TSPEAR	ENST00000642437.1 link	n.*1724G>A		3_prime_UTR_variant	Exon 12 of 13			ENSP00000496535.1	A0A2R8YFK6

Frequencies

GnomAD3 genomes

AF:

0.00430

AC:

653

AN:

151986

Hom.:

Cov.:

show subpopulations

Gnomad AFR

AF:

0.0150

Gnomad AMI

AF:

0.00

Gnomad AMR

AF:

0.00157

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:

0.00383

GnomAD2 exomes

AF:

0.00108

AC:

272

AN:

251416

AF XY:

0.000736

show subpopulations

Gnomad AFR exome

AF:

0.0148

Gnomad AMR exome

AF:

0.000723

Gnomad ASJ exome

AF:

0.00

Gnomad EAS exome

AF:

0.00

Gnomad FIN exome

AF:

0.00

Gnomad NFE exome

AF:

0.0000264

Gnomad OTH exome

AF:

0.000489

GnomAD4 exome

AF:

0.000397

AC:

580

AN:

1461668

Hom.:

Cov.:

AF XY:

0.000337

AC XY:

245

AN XY:

727156

show subpopulations

African (AFR)

AF:

0.0131

AC:

438

AN:

33480

American (AMR)

AF:

0.000895

AC:

AN:

44714

Ashkenazi Jewish (ASJ)

AF:

0.00

AC:

AN:

26132

East Asian (EAS)

AF:

0.00

AC:

AN:

39700

South Asian (SAS)

AF:

0.0000116

AC:

AN:

86256

European-Finnish (FIN)

AF:

0.00

AC:

AN:

53376

Middle Eastern (MID)

AF:

0.000867

AC:

AN:

5768

European-Non Finnish (NFE)

AF:

0.0000315

AC:

AN:

1111862

Other (OTH)

AF:

0.00101

AC:

AN:

60380

Allele Balance Distribution

Red line indicates average allele balance

Average allele balance: 0.459

Heterozygous variant carriers

110

138

0.00

0.20

0.40

0.60

0.80

0.95

Allele balance

GnomAD4 genome

AF:

0.00427

AC:

649

AN:

152104

Hom.:

Cov.:

AF XY:

0.00391

AC XY:

291

AN XY:

74336

show subpopulations

African (AFR)

AF:

0.0149

AC:

616

AN:

41442

American (AMR)

AF:

0.00157

AC:

AN:

15296

Ashkenazi Jewish (ASJ)

AF:

0.00

AC:

AN:

3472

East Asian (EAS)

AF:

0.00

AC:

AN:

5168

South Asian (SAS)

AF:

0.00

AC:

AN:

4812

European-Finnish (FIN)

AF:

0.00

AC:

AN:

10600

Middle Eastern (MID)

AF:

0.00

AC:

AN:

294

European-Non Finnish (NFE)

AF:

0.0000147

AC:

AN:

67996

Other (OTH)

AF:

0.00379

AC:

AN:

2112

Allele Balance Distribution

Red line indicates average allele balance

Average allele balance: 0.524

Heterozygous variant carriers

100

134

167

0.00

0.20

0.40

0.60

0.80

0.95

Allele balance

Alfa

AF:

0.00201

Hom.:

Bravo

AF:

0.00490

ClinVar

Significance: Benign

Submissions summary: Benign:3

Revision: criteria provided, multiple submitters, no conflicts

LINK: link

Submissions by phenotype

not provided

Benign:2

Oct 12, 2018

GeneDx

Significance:Benign

Review Status:criteria provided, single submitter

Collection Method:clinical testing

- -

Jan 22, 2025

Labcorp Genetics (formerly Invitae), Labcorp

Significance:Benign

Review Status:criteria provided, single submitter

Collection Method:clinical testing

- -

not specified

Benign:1

Nov 24, 2014

Laboratory for Molecular Medicine, Mass General Brigham Personalized Medicine

Significance:Benign

Review Status:criteria provided, single submitter

Collection Method:clinical testing

Ser593Ser in exon 11 of TSPEAR: This variant is not expected to have clinical si gnificance because it does not alter an amino acid residue and is not located wi thin the splice consensus sequence. It has been identified in 1.5% (66/4406) of African American chromosomes from a broad population by the NHLBI Exome Sequenci ng Project (http://evs.gs.washington.edu/EVS; dbSNP rs138358770). -

Computational scores

Source: dbNSFP v4.3

Name

Calibrated prediction

Score

Prediction

BayesDel_noAF

Benign

-0.64

CADD

Benign

0.056

(source)

DANN

Benign

0.89

PhyloP100

-6.8

Mutation Taster

=100/0

polymorphism

(source)

Splicing

Name

Calibrated prediction

Score

Prediction

SpliceAI score (max)

0.010

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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21-44504857-C-T

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