Genetic Variant KRTAP13-3:p.Arg100Gln (chr21-30425614-C-T) – ACMG Classification: Likely_benign (-2 pts)

Variant summary

Our verdict is Likely benign. Variant got -2 ACMG points: 2P and 4B. PM2BP4_Strong

The NM_181622.2(KRTAP13-3):c.299G>A(p.Arg100Gln) variant causes a missense change involving the alteration of a non-conserved nucleotide. The variant allele was found at a frequency of 0.0000558 in 1,613,986 control chromosomes in the GnomAD database, with no homozygous occurrence. In-silico tool predicts a benign outcome for this variant. 15/21 in silico tools predict a benign outcome for this variant. Variant has been reported in ClinVar as Uncertain significance (★).

Frequency

Genomes: 𝑓 0.00013 ( 0 hom., cov: 32)

Exomes 𝑓: 0.000048 ( 0 hom. )

Consequence

KRTAP13-3
NM_181622.2 missense

Scores

Clinical Significance

Uncertain significance criteria provided, single submitter U:1

Conservation

PhyloP100: 0.265

Variant links:

Genes affected

KRTAP13-3 (HGNC:18925): (keratin associated protein 13-3) Predicted to be located in cytosol. [provided by Alliance of Genome Resources, Apr 2022]

KRTAP13-3 links:

LOC105372772 (HGNC:):

LOC105372772 links:

Genome browser will be placed here

ACMG classification

Classification made for transcript

Verdict is Likely_benign. Variant got -2 ACMG points.

PM2

Very rare variant in population databases, with high coverage;

BP4

Computational evidence support a benign effect (MetaRNN=0.062833846).

Transcripts

RefSeq

Gene	Transcript	HGVSc	HGVSp	Effect	Exon rank	MANE	Protein	UniProt
KRTAP13-3	NM_181622.2 link	c.299G>A	p.Arg100Gln	missense_variant	Exon 1 of 1	ENST00000390690.3	NP_853653.1	Q3SY46
LOC105372772	XR_937653.3 link	n.196-32254G>A		intron_variant	Intron 3 of 3

Ensembl

Gene	Transcript	HGVSc	HGVSp	Effect	Exon rank	TSL	MANE	Protein	Appris	UniProt
KRTAP13-3	ENST00000390690.3 link	c.299G>A	p.Arg100Gln	missense_variant	Exon 1 of 1	6	NM_181622.2	ENSP00000375109.2		Q3SY46

Frequencies

GnomAD3 genomes

AF:

0.000131

AC:

AN:

152128

Hom.:

Cov.:

show subpopulations

Gnomad AFR

AF:

0.000410

Gnomad AMI

AF:

0.00

Gnomad AMR

AF:

0.0000655

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:

0.0000839

AC:

AN:

250228

Hom.:

AF XY:

0.0000516

AC XY:

AN XY:

135716

show subpopulations

Gnomad AFR exome

AF:

0.000709

Gnomad AMR exome

AF:

0.0000868

Gnomad ASJ exome

AF:

0.00

Gnomad EAS exome

AF:

0.00

Gnomad SAS exome

AF:

0.000196

Gnomad FIN exome

AF:

0.00

Gnomad NFE exome

AF:

0.00000882

Gnomad OTH exome

AF:

0.00

GnomAD4 exome

AF:

0.0000479

AC:

AN:

1461858

Hom.:

Cov.:

AF XY:

0.0000440

AC XY:

AN XY:

727238

show subpopulations

Gnomad4 AFR exome

AF:

0.000597

Gnomad4 AMR exome

AF:

0.0000671

Gnomad4 ASJ exome

AF:

0.00

Gnomad4 EAS exome

AF:

0.00

Gnomad4 SAS exome

AF:

0.000336

Gnomad4 FIN exome

AF:

0.00

Gnomad4 NFE exome

AF:

0.0000135

Gnomad4 OTH exome

AF:

0.0000497

GnomAD4 genome

AF:

0.000131

AC:

AN:

152128

Hom.:

Cov.:

AF XY:

0.000108

AC XY:

AN XY:

74314

show subpopulations

Gnomad4 AFR

AF:

0.000410

Gnomad4 AMR

AF:

0.0000655

Gnomad4 ASJ

AF:

0.00

Gnomad4 EAS

AF:

0.00

Gnomad4 SAS

AF:

0.000414

Gnomad4 FIN

AF:

0.00

Gnomad4 NFE

AF:

0.00

Gnomad4 OTH

AF:

0.00

Alfa

AF:

0.000161

Hom.:

Bravo

AF:

0.000196

ESP6500AA

AF:

0.000460

AC:

ESP6500EA

AF:

0.00

AC:

ExAC

AF:

0.000115

AC:

Asia WGS

AF:

0.000289

AC:

AN:

3478

ClinVar

Significance: Uncertain significance

Submissions summary: Uncertain:1

Revision: criteria provided, single submitter

LINK: link

Submissions by phenotype

not specified

Uncertain:1

Apr 18, 2024

Ambry Genetics

Significance: Uncertain significance

Review Status: criteria provided, single submitter

Collection Method: clinical testing

The c.299G>A (p.R100Q) alteration is located in exon 1 (coding exon 1) of the KRTAP13-3 gene. This alteration results from a G to A substitution at nucleotide position 299, causing the arginine (R) at amino acid position 100 to be replaced by a glutamine (Q). 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

0.083

BayesDel_addAF

Benign

-0.68

BayesDel_noAF

Benign

-0.84

CADD

Benign

DANN

Benign

0.87

DEOGEN2

Benign

0.046

Eigen

Benign

-1.5

Eigen_PC

Benign

-1.6

FATHMM_MKL

Benign

0.011

LIST_S2

Benign

0.45

M_CAP

Benign

0.0047

MetaRNN

Benign

0.063

MetaSVM

Benign

-1.0

MutationAssessor

Benign

-0.12

PrimateAI

Benign

0.18

PROVEAN

Benign

0.14

REVEL

Benign

0.13

Sift

Benign

0.059

Sift4G

Benign

0.21

Polyphen

0.97

Vest4

0.19

MVP

0.072

MPC

0.0091

ClinPred

0.019

GERP RS

-1.0

Varity_R

0.024

gMVP

0.049

Splicing

Name

Calibrated prediction

Score

Prediction

SpliceAI score (max)

0.16

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