Genetic Variant KRTAP4-4:p.Pro108Ser (chr17-41160370-G-A) – 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_032524.2(KRTAP4-4):c.322C>T(p.Pro108Ser) variant causes a missense change involving the alteration of a non-conserved nucleotide. The variant allele was found at a frequency of 0.00000137 in 1,460,384 control chromosomes in the GnomAD database, with no homozygous occurrence. In-silico tool predicts a benign outcome for this variant. 14/22 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. P108T) has been classified as Uncertain significance.

Frequency

Genomes: not found (cov: 31)

Exomes 𝑓: 0.0000014 ( 0 hom. )

Consequence

KRTAP4-4
NM_032524.2 missense

Scores

Clinical Significance

Not reported in ClinVar

Conservation

PhyloP100: -0.0500

Publications

0 publications found

Variant links:

Genes affected

KRTAP4-4 (HGNC:16928): (keratin associated protein 4-4) 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 ultrahigh sulfur KAP family and the gene is localized to a cluster of KAPs at 17q12-q21. [provided by RefSeq, Jul 2008]

KRTAP4-4 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=0.084320605).

Variant Effect in Transcripts

ACMG analysis was done for transcript: NM_032524.2. 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
	KRTAP4-4	NM_032524.2	MANE Select	c.322C>T	p.Pro108Ser	missense	Exon 1 of 1	NP_115913.1	Q9BYR3

Ensembl Transcripts

Sel.	Gene	Transcript	Tags	HGVSc	HGVSp	Effect	Exon Rank	Protein	UniProt
	KRTAP4-4	ENST00000390661.5	TSL:6 MANE Select	c.322C>T	p.Pro108Ser	missense	Exon 1 of 1	ENSP00000375076.3	Q9BYR3

Frequencies

GnomAD3 genomes

Cov.:

GnomAD4 exome

AF:

0.00000137

AC:

AN:

1460384

Hom.:

Cov.:

AF XY:

0.00

AC XY:

AN XY:

726554

show subpopulations

African (AFR)

AF:

0.00

AC:

AN:

32734

American (AMR)

AF:

0.00

AC:

AN:

44626

Ashkenazi Jewish (ASJ)

AF:

0.00

AC:

AN:

26102

East Asian (EAS)

AF:

0.00

AC:

AN:

39652

South Asian (SAS)

AF:

0.00

AC:

AN:

86218

European-Finnish (FIN)

AF:

0.00

AC:

AN:

53408

Middle Eastern (MID)

AF:

0.00

AC:

AN:

5654

European-Non Finnish (NFE)

AF:

8.99e-7

AC:

AN:

1111752

Other (OTH)

AF:

0.0000166

AC:

AN:

60238

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

Age Distribution

Exome 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

GnomAD4 genome

Cov.:

Alfa

AF:

0.00

Hom.:

Bravo

AF:

0.00000378

ClinVar

Not reported in ClinVar

Computational scores

Source: dbNSFP v4.9

Name

Calibrated prediction

Score

Prediction

AlphaMissense

Benign

0.16

BayesDel_addAF

Benign

-0.29

BayesDel_noAF

Benign

-0.65

CADD

Benign

1.0

(source)

DANN

Benign

0.58

DEOGEN2

Benign

0.0043

Eigen

Benign

-1.3

Eigen_PC

Benign

-1.3

FATHMM_MKL

Benign

0.073

LIST_S2

Benign

0.51

M_CAP

Benign

0.012

MetaRNN

Benign

0.084

MetaSVM

Benign

-0.91

MutationAssessor

Uncertain

2.3

PhyloP100

-0.050

PrimateAI

Benign

0.20

PROVEAN

Uncertain

-3.8

REVEL

Benign

0.028

Sift

Benign

0.14

Sift4G

Benign

0.13

Polyphen

0.0070

Vest4

0.095

MutPred

0.48

Loss of loop (P = 0.0603)

MVP

0.11

MPC

0.0083

ClinPred

0.068

GERP RS

-0.67

PromoterAI

-0.014

Neutral

(source)

Varity_R

0.064

gMVP

0.055

Splicing

Name

Calibrated prediction

Score

Prediction

SpliceAI score (max)

0.090

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