Genetic Variant KRTAP3-1:p.Val11Phe (chr17-41009044-C-A) – ACMG Classification: Uncertain_significance (2 pts)

Variant summary

Our verdict is Uncertain significance. Variant got 2 ACMG points: 2P and 0B. PM2

The NM_031958.2(KRTAP3-1):c.31G>T(p.Val11Phe) variant causes a missense change involving the alteration of a non-conserved nucleotide. The variant allele was found at a frequency of 0.0000496 in 1,613,886 control chromosomes in the GnomAD database, with no homozygous occurrence. Variant has been reported in ClinVar as Uncertain significance (★).

Frequency

Genomes: 𝑓 0.000053 ( 0 hom., cov: 32)

Exomes 𝑓: 0.000049 ( 0 hom. )

Consequence

KRTAP3-1
NM_031958.2 missense

Scores

Clinical Significance

Uncertain significance criteria provided, single submitter U:1

Conservation

PhyloP100: 0.817

Variant links:

Genes affected

KRTAP3-1 (HGNC:16778): (keratin associated protein 3-1) This protein is a member of the keratin-associated protein (KAP) family. The KAP proteins form a matrix of keratin intermediate filaments which contribute to the structure of hair fibers. KAP family members appear to have unique, family-specific amino- and carboxyl-terminal regions and are subdivided into three multi-gene families according to amino acid composition: the high sulfur, the ultrahigh sulfur, and the high tyrosine/glycine KAPs. This protein is a member of the high sulfur KAP family and the gene is localized to a cluster of KAPs at 17q12-q21. [provided by RefSeq, Jul 2008]

KRTAP3-1 links:

Genome browser will be placed here

ACMG classification

Classification made for transcript

Verdict is Uncertain_significance. Variant got 2 ACMG points.

PM2

Very rare variant in population databases, with high coverage;

Transcripts

RefSeq

Gene	Transcript	HGVSc	HGVSp	Effect	Exon rank	MANE	Protein	UniProt
KRTAP3-1	NM_031958.2 link	c.31G>T	p.Val11Phe	missense_variant	Exon 1 of 1	ENST00000391588.3	NP_114164.1	Q9BYR8

Ensembl

Gene	Transcript	HGVSc	HGVSp	Effect	Exon rank	TSL	MANE	Protein	Appris	UniProt
KRTAP3-1	ENST00000391588.3 link	c.31G>T	p.Val11Phe	missense_variant	Exon 1 of 1	6	NM_031958.2	ENSP00000375430.1		Q9BYR8
KRTAP3-1	ENST00000581033.1 link	n.133G>T		splice_region_variant, non_coding_transcript_exon_variant	Exon 3 of 3	3

Frequencies

GnomAD3 genomes

AF:

0.0000526

AC:

AN:

152110

Hom.:

Cov.:

show subpopulations

Gnomad AFR

AF:

0.00

Gnomad AMI

AF:

0.00

Gnomad AMR

AF:

0.00

Gnomad ASJ

AF:

0.00

Gnomad EAS

AF:

0.00154

Gnomad SAS

AF:

0.00

Gnomad FIN

AF:

0.00

Gnomad MID

AF:

0.00

Gnomad NFE

AF:

0.00

Gnomad OTH

AF:

0.00

GnomAD3 exomes

AF:

0.0000959

AC:

AN:

250186

Hom.:

AF XY:

0.0000888

AC XY:

AN XY:

135202

show subpopulations

Gnomad AFR exome

AF:

0.00

Gnomad AMR exome

AF:

0.00

Gnomad ASJ exome

AF:

0.00

Gnomad EAS exome

AF:

0.00120

Gnomad SAS exome

AF:

0.00

Gnomad FIN exome

AF:

0.00

Gnomad NFE exome

AF:

0.00

Gnomad OTH exome

AF:

0.000328

GnomAD4 exome

AF:

0.0000493

AC:

AN:

1461776

Hom.:

Cov.:

AF XY:

0.0000564

AC XY:

AN XY:

727180

show subpopulations

Gnomad4 AFR exome

AF:

0.0000299

Gnomad4 AMR exome

AF:

0.00

Gnomad4 ASJ exome

AF:

0.00

Gnomad4 EAS exome

AF:

0.00171

Gnomad4 SAS exome

AF:

0.00

Gnomad4 FIN exome

AF:

0.00

Gnomad4 NFE exome

AF:

0.00

Gnomad4 OTH exome

AF:

0.0000497

GnomAD4 genome

AF:

0.0000526

AC:

AN:

152110

Hom.:

Cov.:

AF XY:

0.0000538

AC XY:

AN XY:

74308

show subpopulations

Gnomad4 AFR

AF:

0.00

Gnomad4 AMR

AF:

0.00

Gnomad4 ASJ

AF:

0.00

Gnomad4 EAS

AF:

0.00154

Gnomad4 SAS

AF:

0.00

Gnomad4 FIN

AF:

0.00

Gnomad4 NFE

AF:

0.00

Gnomad4 OTH

AF:

0.00

Bravo

AF:

0.000125

ExAC

AF:

0.0000659

AC:

ClinVar

Significance: Uncertain significance

Submissions summary: Uncertain:1

Revision: criteria provided, single submitter

LINK: link

Submissions by phenotype

not specified

Uncertain:1

Oct 04, 2022

Ambry Genetics

Significance: Uncertain significance

Review Status: criteria provided, single submitter

Collection Method: clinical testing

The c.31G>T (p.V11F) alteration is located in exon 1 (coding exon 1) of the KRTAP3-1 gene. This alteration results from a G to T substitution at nucleotide position 31, causing the valine (V) at amino acid position 11 to be replaced by a phenylalanine (F). 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

0.19

BayesDel_addAF

Benign

-0.13

BayesDel_noAF

Uncertain

-0.010

CADD

Benign

DANN

Uncertain

1.0

DEOGEN2

Benign

0.12

Eigen

Uncertain

0.52

Eigen_PC

Uncertain

0.50

FATHMM_MKL

Benign

0.64

M_CAP

Benign

0.023

MetaRNN

Uncertain

0.53

MetaSVM

Benign

-0.72

PrimateAI

Uncertain

0.61

PROVEAN

Uncertain

-4.3

REVEL

Benign

0.29

Sift

Uncertain

0.0010

Sift4G

Uncertain

0.010

Polyphen

1.0

Vest4

0.75

MutPred

0.76

Loss of sheet (P = 0.0457);

MVP

0.39

MPC

0.12

ClinPred

0.45

GERP RS

5.8

Varity_R

0.50

gMVP

0.31

Splicing

Name

Calibrated prediction

Score

Prediction

SpliceAI score (max)

0.010

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