chr21-44573913-G-C

Position:

chr21-44573913-G-C

Variant summary

Our verdict is Likely benign. Variant got -4 ACMG points: 0P and 4B. BP4_Strong

The NM_198687.2(KRTAP10-4):c.155G>C(p.Cys52Ser) variant causes a missense change involving the alteration of a non-conserved nucleotide. The variant allele was found at a frequency of 0.000125 in 152,178 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 0.00012 ( 0 hom., cov: 47)

Exomes 𝑓: 0.000030 ( 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: 0.0930

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 Likely_benign. Variant got -4 ACMG points.

BP4

Computational evidence support a benign effect (MetaRNN=0.065803915).

Transcripts

RefSeq

Gene	Transcript	HGVSc	HGVSp	Effect	#exon/exons	MANE	Protein
KRTAP10-4	NM_198687.2 linkuse as main transcript	c.155G>C	p.Cys52Ser	missense_variant	1/1	ENST00000400374.4	NP_941960.2
TSPEAR	NM_144991.3 linkuse as main transcript	c.83-5908C>G		intron_variant		ENST00000323084.9	NP_659428.2
TSPEAR	NM_001272037.2 linkuse as main transcript	c.-122-5908C>G		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.155G>C	p.Cys52Ser	missense_variant	1/1		NM_198687.2	ENSP00000383225	P1
TSPEAR	ENST00000323084.9 linkuse as main transcript	c.83-5908C>G		intron_variant		1	NM_144991.3	ENSP00000321987	P1	Q8WU66-1
TSPEAR	ENST00000642437.1 linkuse as main transcript	c.*28-5908C>G		intron_variant, NMD_transcript_variant				ENSP00000496535

Frequencies

GnomAD3 genomes

AF:

0.000132

AC:

AN:

152062

Hom.:

Cov.:

show subpopulations

Gnomad AFR

AF:

0.000388

Gnomad AMI

AF:

0.00

Gnomad AMR

AF:

0.000131

Gnomad ASJ

AF:

0.00

Gnomad EAS

AF:

0.00

Gnomad SAS

AF:

0.000414

Gnomad FIN

AF:

0.00

Gnomad MID

AF:

0.00

Gnomad NFE

AF:

0.00

Gnomad OTH

AF:

0.00

GnomAD3 exomes

AF:

0.0000536

AC:

AN:

242656

Hom.:

AF XY:

0.0000529

AC XY:

AN XY:

132274

show subpopulations

Gnomad AFR exome

AF:

0.000713

Gnomad AMR exome

AF:

0.00

Gnomad ASJ exome

AF:

0.00

Gnomad EAS exome

AF:

0.0000570

Gnomad SAS exome

AF:

0.00

Gnomad FIN exome

AF:

0.00

Gnomad NFE exome

AF:

0.0000181

Gnomad OTH exome

AF:

0.00

GnomAD4 exome

Data not reliable, filtered out with message: AS_VQSR

AF:

0.0000301

AC:

AN:

1460606

Hom.:

Cov.:

232

AF XY:

0.0000385

AC XY:

AN XY:

726622

show subpopulations

Gnomad4 AFR exome

AF:

0.000449

Gnomad4 AMR exome

AF:

0.0000448

Gnomad4 ASJ exome

AF:

0.00

Gnomad4 EAS exome

AF:

0.0000756

Gnomad4 SAS exome

AF:

0.000209

Gnomad4 FIN exome

AF:

0.00

Gnomad4 NFE exome

AF:

0.00000270

Gnomad4 OTH exome

AF:

0.0000498

GnomAD4 genome

AF:

0.000125

AC:

AN:

152178

Hom.:

Cov.:

AF XY:

0.000121

AC XY:

AN XY:

74416

show subpopulations

Gnomad4 AFR

AF:

0.000387

Gnomad4 AMR

AF:

0.000131

Gnomad4 ASJ

AF:

0.00

Gnomad4 EAS

AF:

0.00

Gnomad4 SAS

AF:

0.000207

Gnomad4 FIN

AF:

0.00

Gnomad4 NFE

AF:

0.00

Gnomad4 OTH

AF:

0.00

Alfa

AF:

0.0000843

Hom.:

ExAC

AF:

0.0000665

AC:

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

Jul 14, 2021

The c.155G>C (p.C52S) alteration is located in exon 1 (coding exon 1) of the KRTAP10-4 gene. This alteration results from a G to C substitution at nucleotide position 155, causing the cysteine (C) at amino acid position 52 to be replaced by a serine (S). 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

0.12

BayesDel_addAF

Benign

-0.40

BayesDel_noAF

Benign

-0.45

CADD

Benign

DANN

Benign

0.96

Eigen

Benign

-0.35

Eigen_PC

Benign

-0.49

FATHMM_MKL

Benign

0.085

LIST_S2

Benign

0.55

T;.;T

M_CAP

Benign

0.020

MetaRNN

Benign

0.066

T;T;T

MetaSVM

Benign

-1.1

MutationTaster

Benign

1.0

D;N

PrimateAI

Benign

0.24

PROVEAN

Pathogenic

-5.9

.;D;.

REVEL

Benign

0.086

Sift

Benign

0.054

.;T;.

Sift4G

Uncertain

0.056

.;T;.

Vest4

0.21

MutPred

0.49

.;Gain of glycosylation at C52 (P = 0.0157);.;

MVP

0.14

MPC

0.86

ClinPred

0.17

GERP RS

2.8

gMVP

0.17

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