Variant chr21-44509222-C-G details in Genebe, Genetics Data Aggregator

Variant summary

Our verdict is Uncertain significance. Variant got 1 ACMG points: 2P and 1B. PM2BP4

The ENST00000323084.9(TSPEAR):c.1731G>C(p.Lys577Asn) variant causes a missense change involving the alteration of a non-conserved nucleotide. The variant allele was found at a frequency of 0.00000684 in 1,461,748 control chromosomes in the GnomAD database, with no homozygous occurrence. 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)

Exomes 𝑓: 0.0000068 ( 0 hom. )

Consequence

TSPEAR
ENST00000323084.9 missense

Scores

Clinical Significance

Uncertain significance criteria provided, single submitter U:1

Conservation

PhyloP100: 0.739

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 links:

TSPEAR (HGNC:):

TSPEAR links:

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ACMG classification

Classification made for transcript

Verdict is Uncertain_significance. Variant got 1 ACMG points.

PM2

Very rare variant in population databases, with high coverage;

BP4

Computational evidence support a benign effect (MetaRNN=0.36512005).

Transcripts

RefSeq

Gene	Transcript	HGVSc	HGVSp	Effect	#exon/exons	MANE	Protein	UniProt
TSPEAR	NM_144991.3 linkuse as main transcript	c.1731G>C	p.Lys577Asn	missense_variant	10/12	ENST00000323084.9	NP_659428.2	Q8WU66-1
TSPEAR	NM_001272037.2 linkuse as main transcript	c.1527G>C	p.Lys509Asn	missense_variant	11/13		NP_001258966.1	Q8WU66
TSPEAR-AS1	NR_103707.1 linkuse as main transcript	n.1215-30C>G		intron_variant

Ensembl

Gene	Transcript	HGVSc	HGVSp	Effect	#exon/exons	TSL	MANE	Protein	Appris	UniProt
TSPEAR	ENST00000323084.9 linkuse as main transcript	c.1731G>C	p.Lys577Asn	missense_variant	10/12	1	NM_144991.3	ENSP00000321987.4		Q8WU66-1

Frequencies

GnomAD3 genomes

Cov.:

GnomAD3 exomes

AF:

0.0000119

AC:

AN:

251220

Hom.:

AF XY:

0.0000221

AC XY:

AN XY:

135822

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:

0.0000654

Gnomad FIN exome

AF:

0.00

Gnomad NFE exome

AF:

0.00000880

Gnomad OTH exome

AF:

0.00

GnomAD4 exome

AF:

0.00000684

AC:

AN:

1461748

Hom.:

Cov.:

AF XY:

0.0000110

AC XY:

AN XY:

727172

show subpopulations

Gnomad4 AFR exome

AF:

0.00

Gnomad4 AMR exome

AF:

0.00

Gnomad4 ASJ exome

AF:

0.00

Gnomad4 EAS exome

AF:

0.00

Gnomad4 SAS exome

AF:

0.0000348

Gnomad4 FIN exome

AF:

0.00

Gnomad4 NFE exome

AF:

0.00000450

Gnomad4 OTH exome

AF:

0.0000331

GnomAD4 genome

Cov.:

ExAC

AF:

0.0000165

AC:

EpiCase

AF:

0.00

EpiControl

AF:

0.0000593

ClinVar

Significance: Uncertain significance

Submissions summary: Uncertain:1

Revision: criteria provided, single submitter

LINK: link

Submissions by phenotype

not provided

Uncertain:1

Uncertain significance, criteria provided, single submitter

clinical testing

Labcorp Genetics (formerly Invitae), Labcorp

Oct 24, 2023

This sequence change replaces lysine, which is basic and polar, with asparagine, which is neutral and polar, at codon 577 of the TSPEAR protein (p.Lys577Asn). This variant is present in population databases (rs782202330, gnomAD 0.007%). This variant has not been reported in the literature in individuals affected with TSPEAR-related conditions. 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. -

Computational scores

Source: dbNSFP v4.3

Name

Calibrated prediction

Score

Prediction

AlphaMissense

Pathogenic

0.63

BayesDel_addAF

Benign

-0.18

BayesDel_noAF

Benign

-0.32

CADD

Uncertain

DANN

Uncertain

1.0

DEOGEN2

Uncertain

0.48

T;T

Eigen

Benign

0.14

Eigen_PC

Benign

0.062

FATHMM_MKL

Benign

0.71

LIST_S2

Uncertain

0.92

.;D

M_CAP

Benign

0.049

MetaRNN

Benign

0.37

T;T

MetaSVM

Uncertain

-0.26

MutationAssessor

Benign

2.0

M;M

MutationTaster

Benign

0.99

D;D

PrimateAI

Benign

0.37

PROVEAN

Benign

-1.7

.;N

REVEL

Benign

0.26

Sift

Benign

0.12

.;T

Sift4G

Uncertain

0.032

.;D

Polyphen

0.96

D;D

Vest4

0.62

MutPred

0.54

Loss of ubiquitination at K577 (P = 0.0167);Loss of ubiquitination at K577 (P = 0.0167);

MVP

0.50

MPC

0.17

ClinPred

0.60

GERP RS

0.90

RBP_binding_hub_radar

0.0

RBP_regulation_power_radar

1.7

Varity_R

0.10

gMVP

0.42

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

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