Genetic Variant KRTAP2-1:p.Thr97Ser (chr17-41046978-G-C) – ACMG Classification: Uncertain_significance (0 pts)

Variant summary

Our verdict is Uncertain significance. The variant received 0 ACMG points: 2P and 2B. PM2BP4_Moderate

The NM_001123387.1(KRTAP2-1):c.290C>G(p.Thr97Ser) variant causes a missense change involving the alteration of a non-conserved nucleotide. The variant allele was found at a frequency of 0.00000657 in 152,200 control chromosomes in the GnomAD database, with no homozygous occurrence. In-silico tool predicts a benign outcome for this variant. 13/21 in silico tools predict a benign outcome for this variant. No clinical diagnostic laboratories have submitted clinical-significance assessments for this variant to ClinVar. Another variant affecting the same amino acid position, but resulting in a different missense (i.e. T97N) has been classified as Uncertain significance.

Frequency

Genomes: 𝑓 0.0000066 ( 0 hom., cov: 31)

Consequence

KRTAP2-1
NM_001123387.1 missense

Scores

Clinical Significance

Not reported in ClinVar

Conservation

PhyloP100: 1.72

Publications

0 publications found

Variant links:

Genes affected

KRTAP2-1 (HGNC:16775): (keratin associated protein 2-1) Predicted to be located in cytosol. [provided by Alliance of Genome Resources, Apr 2022]

KRTAP2-1 links:

ENSG00000306126 (HGNC:):

ENSG00000306126 links:

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ACMG classification

Classification was made for transcript

Our verdict: Uncertain_significance. The variant received 0 ACMG points.

PM2

Very rare variant in population databases, with high coverage;

BP4

Computational evidence support a benign effect (MetaRNN=0.15540555).

Variant Effect in Transcripts

ACMG analysis was done for transcript: NM_001123387.1. You can select a different transcript below to see updated ACMG assignments.

RefSeq Transcripts

Sel.	Gene	Transcript	Tags	HGVSc	HGVSp	Effect	Exon Rank	Protein	UniProt
	KRTAP2-1	NM_001123387.1	MANE Select	c.290C>G	p.Thr97Ser	missense	Exon 1 of 1	NP_001116859.1	Q9BYU5

Ensembl Transcripts

Gene	Transcript	Tags	HGVSc	HGVSp	Effect	Exon Rank	Protein	UniProt
KRTAP2-1	ENST00000391419.3	TSL:6 MANE Select	c.290C>G	p.Thr97Ser	missense	Exon 1 of 1	ENSP00000375238.3	Q9BYU5
ENSG00000306126	ENST00000815517.1		n.220-13321G>C		intron	N/A
ENSG00000306126	ENST00000815518.1		n.160-13321G>C		intron	N/A

Frequencies

GnomAD3 genomes

AF:

0.00000657

AC:

AN:

152200

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:

0.00

Gnomad SAS

AF:

0.000207

Gnomad FIN

AF:

0.00

Gnomad MID

AF:

0.00

Gnomad NFE

AF:

0.00

Gnomad OTH

AF:

0.00

GnomAD4 exome

Cov.:

GnomAD4 genome

AF:

0.00000657

AC:

AN:

152200

Hom.:

Cov.:

AF XY:

0.00

AC XY:

AN XY:

74344

show subpopulations

⚠️ The allele balance in gnomAD version 4 Genomes is significantly skewed from the expected value of 0.5.

African (AFR)

AF:

0.00

AC:

AN:

41454

American (AMR)

AF:

0.00

AC:

AN:

15288

Ashkenazi Jewish (ASJ)

AF:

0.00

AC:

AN:

3472

East Asian (EAS)

AF:

0.00

AC:

AN:

5192

South Asian (SAS)

AF:

0.000207

AC:

AN:

4820

European-Finnish (FIN)

AF:

0.00

AC:

AN:

10624

Middle Eastern (MID)

AF:

0.00

AC:

AN:

316

European-Non Finnish (NFE)

AF:

0.00

AC:

AN:

68028

Other (OTH)

AF:

0.00

AC:

AN:

2094

⚠️ The allele balance in gnomAD version 4 Genomes is significantly skewed from the expected value of 0.5. (p-value = 0), which strongly suggests a high chance of mosaicism in these individuals.

Allele Balance Distribution

Red line indicates average allele balance

Average allele balance: 0.275

Heterozygous variant carriers

0.00

0.20

0.40

0.60

0.80

0.95

Allele balance

Age Distribution

Genome Het

Variant carriers

<30

30-35

35-40

40-45

45-50

50-55

55-60

60-65

65-70

70-75

75-80

>80

Age

Alfa

AF:

0.00

Hom.:

ClinVar

Not reported in ClinVar

Computational scores

Source: dbNSFP v4.9

Name

Calibrated prediction

Score

Prediction

AlphaMissense

Benign

0.097

BayesDel_addAF

Benign

-0.052

BayesDel_noAF

Benign

-0.31

CADD

Benign

(source)

DANN

Uncertain

0.98

DEOGEN2

Benign

0.0018

Eigen

Uncertain

0.33

Eigen_PC

Uncertain

0.40

FATHMM_MKL

Uncertain

0.85

M_CAP

Benign

0.0028

MetaRNN

Benign

0.16

MetaSVM

Benign

-0.92

MutationAssessor

Benign

1.5

PhyloP100

1.7

PrimateAI

Uncertain

0.63

PROVEAN

Benign

-0.48

REVEL

Benign

0.20

Sift

Benign

0.43

Sift4G

Benign

1.0

Polyphen

1.0

Vest4

0.27

MutPred

0.42

Loss of solvent accessibility (P = 0.1459)

MVP

0.12

ClinPred

0.76

GERP RS

5.8

PromoterAI

-0.0028

Neutral

(source)

Varity_R

0.049

gMVP

0.054

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

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Variant summary

Frequency

Consequence

Scores

Clinical Significance

Conservation

Publications

ACMG classification

Variant Effect in Transcripts

RefSeq Transcripts

Ensembl Transcripts

Frequencies

Age Distribution

ClinVar

Computational scores

Splicing

Publications

Other links and lift over