Genetic Variant KRTAP4-3:p.Cys135Arg (chr17-41167770-A-G) – ACMG Classification: Uncertain_significance (1 pts)

Variant summary

Our verdict is Uncertain significance. The variant received 1 ACMG points: 2P and 1B. PM2BP4

The NM_033187.2(KRTAP4-3):c.403T>C(p.Cys135Arg) variant causes a missense change involving the alteration of a non-conserved nucleotide. The variant allele was found at a frequency of 0.000000684 in 1,461,250 control chromosomes in the GnomAD database, with no homozygous occurrence. In-silico tool predicts a benign outcome for this variant. Variant has been reported in ClinVar as Uncertain significance (★).

Frequency

Genomes: not found (cov: 32)

Exomes 𝑓: 6.8e-7 ( 0 hom. )

Consequence

KRTAP4-3
NM_033187.2 missense

Scores

Clinical Significance

Uncertain significance criteria provided, single submitter U:1

Conservation

PhyloP100: -0.178

Publications

0 publications found

Variant links:

Genes affected

KRTAP4-3 (HGNC:18908): (keratin associated protein 4-3) Involved in aging and hair cycle. Predicted to be located in cytosol. [provided by Alliance of Genome Resources, Apr 2022]

KRTAP4-3 links:

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ACMG classification

Classification was made for transcript

Our verdict: Uncertain_significance. The variant received 1 ACMG points.

PM2

Very rare variant in population databases, with high coverage;

BP4

Computational evidence support a benign effect (MetaRNN=0.330634).

Transcripts

RefSeq

Gene	Transcript	HGVSc	HGVSp	Effect	Exon rank	MANE	Protein	UniProt
KRTAP4-3	NM_033187.2 link	c.403T>C	p.Cys135Arg	missense_variant	Exon 1 of 1	ENST00000391356.4	NP_149443.1	Q9BYR4

Ensembl

Gene	Transcript	HGVSc	HGVSp	Effect	Exon rank	TSL	MANE	Protein	Appris	UniProt
KRTAP4-3	ENST00000391356.4 link	c.403T>C	p.Cys135Arg	missense_variant	Exon 1 of 1	6	NM_033187.2	ENSP00000375151.2		Q9BYR4

Frequencies

GnomAD3 genomes

Cov.:

GnomAD2 exomes

AF:

0.00

AC:

AN:

249036

AF XY:

0.00

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 FIN exome

AF:

0.00

Gnomad NFE exome

AF:

0.00

Gnomad OTH exome

AF:

0.00

GnomAD4 exome

AF:

6.84e-7

AC:

AN:

1461250

Hom.:

Cov.:

AF XY:

0.00000138

AC XY:

AN XY:

726874

show subpopulations

African (AFR)

AF:

0.00

AC:

AN:

33450

American (AMR)

AF:

0.00

AC:

AN:

44572

Ashkenazi Jewish (ASJ)

AF:

0.00

AC:

AN:

26122

East Asian (EAS)

AF:

0.00

AC:

AN:

39670

South Asian (SAS)

AF:

0.00

AC:

AN:

86206

European-Finnish (FIN)

AF:

0.00

AC:

AN:

53412

Middle Eastern (MID)

AF:

0.00

AC:

AN:

5702

European-Non Finnish (NFE)

AF:

8.99e-7

AC:

AN:

1111756

Other (OTH)

AF:

0.00

AC:

AN:

60360

Allele Balance Distribution

Red line indicates average allele balance

Average allele balance: 0.475

Heterozygous variant carriers

0.00

0.20

0.40

0.60

0.80

0.95

Allele balance

GnomAD4 genome

Cov.:

ExAC

AF:

0.00000825

AC:

ClinVar

Significance: Uncertain significance

Submissions summary: Uncertain:1

Revision: criteria provided, single submitter

LINK: link

Submissions by phenotype

not specified

Uncertain:1

Oct 25, 2024

Ambry Genetics

Significance:Uncertain significance

Review Status:criteria provided, single submitter

Collection Method:clinical testing

The c.403T>C (p.C135R) alteration is located in exon 1 (coding exon 1) of the KRTAP4-3 gene. This alteration results from a T to C substitution at nucleotide position 403, causing the cysteine (C) at amino acid position 135 to be replaced by an arginine (R). 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

Uncertain

0.47

BayesDel_addAF

Benign

-0.17

BayesDel_noAF

Benign

-0.49

CADD

Benign

(source)

DANN

Benign

0.87

DEOGEN2

Benign

0.046

Eigen

Uncertain

0.20

Eigen_PC

Benign

0.045

FATHMM_MKL

Benign

0.65

LIST_S2

Benign

0.16

M_CAP

Benign

0.0047

MetaRNN

Benign

0.33

MetaSVM

Benign

-1.2

MutationAssessor

Pathogenic

3.9

PhyloP100

-0.18

PrimateAI

Benign

0.26

PROVEAN

Pathogenic

-7.4

REVEL

Benign

0.15

Sift

Uncertain

0.027

Sift4G

Pathogenic

0.0010

Polyphen

0.90

Vest4

0.12

MutPred

0.75

Gain of solvent accessibility (P = 0.0584);

MVP

0.27

MPC

0.031

ClinPred

0.49

GERP RS

4.0

PromoterAI

0.018

Neutral

(source)

Varity_R

0.68

gMVP

0.11

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

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Variant summary

Frequency

Consequence

Scores

Clinical Significance

Conservation

Publications

ACMG classification

Transcripts

RefSeq

Ensembl

Frequencies

ClinVar

Submissions by phenotype

Computational scores

Splicing

Publications

Other links and lift over