21-44573988-G-A

Variant names:

Variant summary

Our verdict is Uncertain significance. The variant received 0 ACMG points: 2P and 2B. PM2BP4_Moderate

The NM_198687.2(KRTAP10-4):c.230G>A(p.Cys77Tyr) variant causes a missense change involving the alteration of a non-conserved nucleotide. The variant was absent in control chromosomes in GnomAD project. In-silico tool predicts a benign outcome for this variant. 14/20 in silico tools predict a benign outcome for this variant. Variant has been reported in ClinVar as Uncertain significance (★).

Frequency

Genomes: not found (cov: 36)

Exomes 𝑓: 0.0000014 ( 0 hom. )

Failed GnomAD Quality Control

Consequence

KRTAP10-4
NM_198687.2 missense

Scores

Clinical Significance

Uncertain significance criteria provided, single submitter U:1

Conservation

PhyloP100: 2.51

Publications

0 publications found

Variant links:

Genes affected

KRTAP10-4 (HGNC:20521): (keratin associated protein 10-4) This is an intronless gene located in a cluster of related genes on the q arm of chromosome 21. The proteins encoded by these genes form disulfide bonds with cysteine residues in hair keratins, thereby contributing to the structure and stability of hair fibers. [provided by RefSeq, Apr 2014]

KRTAP10-4 links:

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: Uncertain_significance. The variant received 0 ACMG points.

PM2

Very rare variant in population databases, with high coverage;

BP4

Computational evidence support a benign effect (MetaRNN=0.170423).

Transcripts

RefSeq

Gene	Transcript	HGVSc	HGVSp	Effect	Exon rank	MANE	Protein	UniProt
KRTAP10-4	NM_198687.2 link	c.230G>A	p.Cys77Tyr	missense_variant	Exon 1 of 1	ENST00000400374.4	NP_941960.2	P60372
TSPEAR	NM_144991.3 link	c.83-5983C>T		intron_variant	Intron 1 of 11	ENST00000323084.9	NP_659428.2	Q8WU66-1
TSPEAR	NM_001272037.2 link	c.-122-5983C>T		intron_variant	Intron 2 of 12		NP_001258966.1	Q8WU66

Ensembl

Gene	Transcript	HGVSc	HGVSp	Effect	Exon rank	TSL	MANE	Protein	UniProt
KRTAP10-4	ENST00000400374.4 link	c.230G>A	p.Cys77Tyr	missense_variant	Exon 1 of 1	6	NM_198687.2	ENSP00000383225.3	P60372
TSPEAR	ENST00000323084.9 link	c.83-5983C>T		intron_variant	Intron 1 of 11	1	NM_144991.3	ENSP00000321987.4	Q8WU66-1
TSPEAR	ENST00000642437.1 link	n.*28-5983C>T		intron_variant	Intron 2 of 12			ENSP00000496535.1	A0A2R8YFK6
TSPEAR	ENST00000397916.1 link	n.-172C>T		upstream_gene_variant		1

Frequencies

GnomAD3 genomes

Cov.:

GnomAD2 exomes

AF:

0.00000429

AC:

AN:

233194

AF XY:

0.00000784

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 FIN exome

AF:

0.00

Gnomad NFE exome

AF:

0.00000924

Gnomad OTH exome

AF:

0.00

GnomAD4 exome

Data not reliable, filtered out with message: AS_VQSR

AF:

0.00000137

AC:

AN:

1460344

Hom.:

Cov.:

176

AF XY:

0.00000275

AC XY:

AN XY:

726526

show subpopulations

⚠️ The allele balance in gnomAD version 4 Exomes is significantly skewed from the expected value of 0.5.

African (AFR)

AF:

0.00

AC:

AN:

33444

American (AMR)

AF:

0.00

AC:

AN:

44684

Ashkenazi Jewish (ASJ)

AF:

0.00

AC:

AN:

26090

East Asian (EAS)

AF:

0.00

AC:

AN:

39692

South Asian (SAS)

AF:

0.00

AC:

AN:

86162

European-Finnish (FIN)

AF:

0.00

AC:

AN:

53342

Middle Eastern (MID)

AF:

0.00

AC:

AN:

4942

European-Non Finnish (NFE)

AF:

0.00000180

AC:

AN:

1111716

Other (OTH)

AF:

0.00

AC:

AN:

60272

⚠️ The allele balance in gnomAD4 Exomes is highly skewed from 0.5 (p-value = 0.000000), which strongly suggests a high chance of mosaicism in these individuals.

Allele Balance Distribution

Red line indicates average allele balance

Average allele balance: 0.300

Heterozygous variant carriers

0.00

0.20

0.40

0.60

0.80

0.95

Allele balance

GnomAD4 genome

Cov.:

Alfa

AF:

0.00

Hom.:

ClinVar

Significance: Uncertain significance

Submissions summary: Uncertain:1

Revision: criteria provided, single submitter

LINK: link

Submissions by phenotype

not specified

Uncertain:1

Dec 21, 2024

Ambry Genetics

Significance:Uncertain significance

Review Status:criteria provided, single submitter

Collection Method:clinical testing

The c.230G>A (p.C77Y) alteration is located in exon 1 (coding exon 1) of the KRTAP10-4 gene. This alteration results from a G to A substitution at nucleotide position 230, causing the cysteine (C) at amino acid position 77 to be replaced by a tyrosine (Y). 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

0.17

BayesDel_addAF

Benign

-0.063

BayesDel_noAF

Benign

-0.33

CADD

Benign

(source)

DANN

Benign

0.92

Eigen

Benign

-0.092

Eigen_PC

Benign

-0.22

FATHMM_MKL

Benign

0.11

LIST_S2

Uncertain

0.95

D;.;D

M_CAP

Benign

0.011

MetaRNN

Benign

0.17

T;T;T

MetaSVM

Benign

-1.0

PhyloP100

2.5

PrimateAI

Benign

0.32

PROVEAN

Pathogenic

-5.1

.;D;.

REVEL

Benign

0.077

Sift

Uncertain

0.0010

.;D;.

Sift4G

Uncertain

0.022

.;D;.

Vest4

0.35

MutPred

0.22

.;Gain of phosphorylation at C77 (P = 0.111);.;

MVP

0.22

MPC

0.77

ClinPred

0.59

GERP RS

3.1

PromoterAI

0.0070

Neutral

(source)

gMVP

0.24

Mutation Taster

=96/4

polymorphism

(source)

Splicing

Name

Calibrated prediction

Score

Prediction

SpliceAI score (max)

0.030

Details are displayed if max score is > 0.2

Find out detailed SpliceAI scores and Pangolin per-transcript scores at spliceailookup.broadinstitute.org

Publications

You must be logged in to view publications. This limit was set because tens of millions (!) of queries from AI bots are generated daily.

21-44573988-G-A

Variant summary

Frequency

Consequence

Scores

Clinical Significance

Conservation

Publications

ACMG classification

Transcripts

RefSeq

Ensembl

Frequencies

Age Distribution

ClinVar

Submissions by phenotype

Computational scores

Splicing

Publications

Other links and lift over