chr21-44573877-C-A

Position:

chr21-44573877-C-A

Variant summary

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

The NM_198687.2(KRTAP10-4):c.119C>A(p.Pro40His) variant causes a missense change involving the alteration of a non-conserved nucleotide. The variant allele was found at a frequency of 0.0000527 in 1,612,786 control chromosomes in the GnomAD database, with no homozygous occurrence. In-silico tool predicts a benign outcome for this variant. 13/19 in silico tools predict a benign outcome for this variant. Variant has been reported in ClinVar as Uncertain significance (★).

Frequency

Genomes: 𝑓 0.00019 ( 0 hom., cov: 49)

Exomes 𝑓: 0.000038 ( 0 hom. )

Consequence

KRTAP10-4
NM_198687.2 missense

Scores

Clinical Significance

Uncertain significance criteria provided, single submitter U:1

Conservation

PhyloP100: -0.277

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 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=0.2156373).

Transcripts

RefSeq

Gene	Transcript	HGVSc	HGVSp	Effect	#exon/exons	MANE	Protein
KRTAP10-4	NM_198687.2 linkuse as main transcript	c.119C>A	p.Pro40His	missense_variant	1/1	ENST00000400374.4	NP_941960.2
TSPEAR	NM_144991.3 linkuse as main transcript	c.83-5872G>T		intron_variant		ENST00000323084.9	NP_659428.2
TSPEAR	NM_001272037.2 linkuse as main transcript	c.-122-5872G>T		intron_variant			NP_001258966.1

Ensembl

Gene	Transcript	HGVSc	HGVSp	Effect	#exon/exons	TSL	MANE	Protein	Appris	UniProt
KRTAP10-4	ENST00000400374.4 linkuse as main transcript	c.119C>A	p.Pro40His	missense_variant	1/1		NM_198687.2	ENSP00000383225	P1
TSPEAR	ENST00000323084.9 linkuse as main transcript	c.83-5872G>T		intron_variant		1	NM_144991.3	ENSP00000321987	P1	Q8WU66-1
TSPEAR	ENST00000642437.1 linkuse as main transcript	c.*28-5872G>T		intron_variant, NMD_transcript_variant				ENSP00000496535

Frequencies

GnomAD3 genomes

AF:

0.000191

AC:

AN:

151562

Hom.:

Cov.:

show subpopulations

Gnomad AFR

AF:

0.000613

Gnomad AMI

AF:

0.00

Gnomad AMR

AF:

0.00

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:

0.0000588

Gnomad OTH

AF:

0.00

GnomAD3 exomes

AF:

0.0000122

AC:

AN:

245756

Hom.:

AF XY:

0.00

AC XY:

AN XY:

133554

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:

0.00

Gnomad FIN exome

AF:

0.00

Gnomad NFE exome

AF:

0.0000268

Gnomad OTH exome

AF:

0.00

GnomAD4 exome

AF:

0.0000383

AC:

AN:

1461114

Hom.:

Cov.:

233

AF XY:

0.0000358

AC XY:

AN XY:

726874

show subpopulations

Gnomad4 AFR exome

AF:

0.000542

Gnomad4 AMR exome

AF:

0.0000448

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:

0.0000279

Gnomad4 OTH exome

AF:

0.0000166

GnomAD4 genome

AF:

0.000191

AC:

AN:

151672

Hom.:

Cov.:

AF XY:

0.000202

AC XY:

AN XY:

74206

show subpopulations

Gnomad4 AFR

AF:

0.000611

Gnomad4 AMR

AF:

0.00

Gnomad4 ASJ

AF:

0.00

Gnomad4 EAS

AF:

0.00

Gnomad4 SAS

AF:

0.00

Gnomad4 FIN

AF:

0.00

Gnomad4 NFE

AF:

0.0000588

Gnomad4 OTH

AF:

0.00

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 02, 2024

The c.119C>A (p.P40H) alteration is located in exon 1 (coding exon 1) of the KRTAP10-4 gene. This alteration results from a C to A substitution at nucleotide position 119, causing the proline (P) at amino acid position 40 to be replaced by a histidine (H). 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

0.15

BayesDel_addAF

Benign

-0.24

BayesDel_noAF

Benign

-0.51

CADD

Benign

DANN

Benign

0.96

Eigen

Benign

-0.69

Eigen_PC

Benign

-0.88

FATHMM_MKL

Benign

0.028

LIST_S2

Benign

0.089

T;.;T

M_CAP

Benign

0.0063

MetaRNN

Benign

0.22

T;T;T

MetaSVM

Benign

-1.1

MutationTaster

Benign

0.95

D;N

PrimateAI

Benign

0.19

PROVEAN

Pathogenic

-7.5

.;D;.

REVEL

Benign

0.091

Sift

Uncertain

0.0020

.;D;.

Sift4G

Uncertain

0.020

.;D;.

Vest4

0.086

MutPred

0.48

.;Loss of catalytic residue at P39 (P = 0.0488);.;

MVP

0.12

MPC

1.4

ClinPred

0.92

GERP RS

-1.3

gMVP

0.071

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