Genetic Variant KRTAP16-1:p.Arg450His (chr17-41307905-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_001146182.2(KRTAP16-1):c.1349G>A(p.Arg450His) variant causes a missense change involving the alteration of a non-conserved nucleotide. The variant allele was found at a frequency of 0.000119 in 1,550,538 control chromosomes in the GnomAD database, with no homozygous occurrence. 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 (★). Another variant affecting the same amino acid position, but resulting in a different missense (i.e. R450C) has been classified as Uncertain significance.

Frequency

Genomes: 𝑓 0.000079 ( 0 hom., cov: 32)

Exomes 𝑓: 0.00012 ( 0 hom. )

Consequence

KRTAP16-1
NM_001146182.2 missense

Scores

Clinical Significance

Uncertain significance criteria provided, single submitter U:1

Conservation

PhyloP100: -0.155

Variant links:

Genes affected

KRTAP16-1 (HGNC:18916): (keratin associated protein 16-1) Predicted to be located in cytosol. [provided by Alliance of Genome Resources, Apr 2022]

KRTAP16-1 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=0.007686019).

Transcripts

RefSeq

Gene	Transcript	HGVSc	HGVSp	Effect	Exon rank	MANE	Protein	UniProt
KRTAP16-1	NM_001146182.2 link	c.1349G>A	p.Arg450His	missense_variant	Exon 1 of 1	ENST00000391352.2	NP_001139654.1	A8MUX0

Ensembl

Gene	Transcript	HGVSc	HGVSp	Effect	Exon rank	TSL	MANE	Protein	Appris	UniProt
KRTAP16-1	ENST00000391352.2 link	c.1349G>A	p.Arg450His	missense_variant	Exon 1 of 1	6	NM_001146182.2	ENSP00000375147.1		A8MUX0

Frequencies

GnomAD3 genomes

AF:

0.0000855

AC:

AN:

152076

Hom.:

Cov.:

show subpopulations

Gnomad AFR

AF:

0.0000242

Gnomad AMI

AF:

0.00

Gnomad AMR

AF:

0.0000655

Gnomad ASJ

AF:

0.00

Gnomad EAS

AF:

0.000192

Gnomad SAS

AF:

0.00

Gnomad FIN

AF:

0.00

Gnomad MID

AF:

0.00318

Gnomad NFE

AF:

0.000118

Gnomad OTH

AF:

0.000478

GnomAD3 exomes

AF:

0.000161

AC:

AN:

148704

Hom.:

AF XY:

0.000138

AC XY:

AN XY:

79970

show subpopulations

Gnomad AFR exome

AF:

0.00

Gnomad AMR exome

AF:

0.0000815

Gnomad ASJ exome

AF:

0.00

Gnomad EAS exome

AF:

0.000556

Gnomad SAS exome

AF:

0.000133

Gnomad FIN exome

AF:

0.00

Gnomad NFE exome

AF:

0.000201

Gnomad OTH exome

AF:

0.000463

GnomAD4 exome

AF:

0.000124

AC:

173

AN:

1398344

Hom.:

Cov.:

AF XY:

0.000130

AC XY:

AN XY:

689678

show subpopulations

Gnomad4 AFR exome

AF:

0.0000316

Gnomad4 AMR exome

AF:

0.0000840

Gnomad4 ASJ exome

AF:

0.00

Gnomad4 EAS exome

AF:

0.000140

Gnomad4 SAS exome

AF:

0.0000883

Gnomad4 FIN exome

AF:

0.00

Gnomad4 NFE exome

AF:

0.000120

Gnomad4 OTH exome

AF:

0.000259

GnomAD4 genome

AF:

0.0000788

AC:

AN:

152194

Hom.:

Cov.:

AF XY:

0.0000403

AC XY:

AN XY:

74410

show subpopulations

Gnomad4 AFR

AF:

0.0000241

Gnomad4 AMR

AF:

0.0000655

Gnomad4 ASJ

AF:

0.00

Gnomad4 EAS

AF:

0.000193

Gnomad4 SAS

AF:

0.00

Gnomad4 FIN

AF:

0.00

Gnomad4 NFE

AF:

0.000118

Gnomad4 OTH

AF:

0.000473

Alfa

AF:

0.000115

Hom.:

Bravo

AF:

0.000113

ExAC

AF:

0.000170

AC:

ClinVar

Significance: Uncertain significance

Submissions summary: Uncertain:1

Revision: criteria provided, single submitter

LINK: link

Submissions by phenotype

not specified

Uncertain:1

Aug 11, 2024

Ambry Genetics

Significance: Uncertain significance

Review Status: criteria provided, single submitter

Collection Method: clinical testing

The c.1349G>A (p.R450H) alteration is located in exon 1 (coding exon 1) of the KRTAP16-1 gene. This alteration results from a G to A substitution at nucleotide position 1349, causing the arginine (R) at amino acid position 450 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

0.075

BayesDel_addAF

Benign

-0.52

BayesDel_noAF

Benign

-0.65

CADD

Benign

DANN

Uncertain

1.0

DEOGEN2

Benign

0.0072

Eigen

Benign

-0.46

Eigen_PC

Benign

-0.52

FATHMM_MKL

Benign

0.059

M_CAP

Benign

0.0084

MetaRNN

Benign

0.0077

MetaSVM

Benign

-0.86

MutationAssessor

Benign

0.81

PrimateAI

Benign

0.22

PROVEAN

Benign

-1.3

REVEL

Benign

0.074

Sift

Uncertain

0.0040

Sift4G

Uncertain

0.027

Vest4

0.059

MVP

0.048

ClinPred

0.059

GERP RS

3.3

Varity_R

0.046

gMVP

0.069

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