17-41065667-C-T

Variant names:

• chr17-41065667-C-T
• NM_033184.4:c.179G>A

Variant summary

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

The NM_033184.4(KRTAP2-4):​c.179G>A​(p.Arg60His) variant causes a missense change involving the alteration of a non-conserved nucleotide. The variant was absent in control chromosomes in GnomAD project. Variant has been reported in ClinVar as Uncertain significance (★).

• Frequency:
  • Genomes: not found (cov: 30)
  • Exomes 𝑓: 7.6e-7 (0 hom.)
  • Failed GnomAD Quality Control
• Consequence: KRTAP2-4 NM_033184.4 missense
• Clinical Significance: Uncertain significance criteria provided, single submitter U:1
• Conservation: PhyloP100: 0.260

Genes affected

KRTAP2-4 (HGNC:18891): (keratin associated protein 2-4) 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 high sulfur KAP family and the gene is localized to a cluster of KAPs at 17q12-q21. [provided by RefSeq, Jul 2008]

ACMG classification

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
KRTAP2-4	NM_033184.4	c.179G>A	p.Arg60His	missense_variant	Exon 1 of 1	ENST00000394015.3	NP_149440.1

Ensembl

Gene	Transcript	HGVSc	HGVSp	Effect	Exon rank	TSL	MANE	Protein	Appris	UniProt
KRTAP2-4	ENST00000394015.3	c.179G>A	p.Arg60His	missense_variant	Exon 1 of 1	6	NM_033184.4	ENSP00000377583.2

Frequencies

GnomAD3 genomes Cov.: 30

GnomAD4 exome Data not reliable, filtered out with message: AS_VQSR AF: 7.61e-7 AC: 1 AN: 1314260 Hom.: 0 Cov.: 30 AF XY: 0.00000156 AC XY: 1 AN XY: 642148

Gnomad4 AFR exome AF: 0.00

Gnomad4 AMR exome AF: 0.00

Gnomad4 ASJ exome AF: 0.00

Gnomad4 EAS exome AF: 0.00

Gnomad4 SAS exome AF: 0.00

Gnomad4 FIN exome AF: 0.00

Gnomad4 NFE exome AF: 9.62e-7

Gnomad4 OTH exome AF: 0.00

GnomAD4 genome Cov.: 30

ClinVar

Significance: Uncertain significance

Submissions summary: Uncertain:1

Revision: criteria provided, single submitter

Submissions by phenotype

not specified Uncertain:1

Nov 22, 2024

Ambry Genetics

Significance: Uncertain significance

Review Status: criteria provided, single submitter

Collection Method: clinical testing

The c.179G>A (p.R60H) alteration is located in exon 1 (coding exon 1) of the KRTAP2-4 gene. This alteration results from a G to A substitution at nucleotide position 179, causing the arginine (R) at amino acid position 60 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	0.13
BayesDel_addAF	Benign	-0.12	T
BayesDel_noAF	Benign	-0.41
CADD	Uncertain	24
DANN	Pathogenic	1.0
DEOGEN2	Benign	0.080	T
Eigen	Uncertain	0.41
Eigen_PC	Uncertain	0.43
FATHMM_MKL	Uncertain	0.78	D
M_CAP	Benign	0.014	T
MetaRNN	Uncertain	0.44	T
MetaSVM	Benign	-0.81	T
PrimateAI	Uncertain	0.61	T
PROVEAN	Uncertain	-3.0	D
REVEL	Benign	0.28
Sift	Uncertain	0.018	D
Sift4G	Uncertain	0.016	D
Vest4		0.27
MutPred		0.61		Loss of sheet (P = 0.1907);
MVP		0.45
MPC		1.7
ClinPred		0.95	D
GERP RS		5.2
Varity_R		0.15
gMVP		0.054

Splicing

Name	Calibrated prediction	Score	Prediction
SpliceAI score (max)		0.12		Details are displayed if max score is > 0.2

Find out detailed SpliceAI scores and Pangolin per-transcript scores at spliceailookup.broadinstitute.org

Publications

No publications associated with this variant yet.

Other links and lift over

hg19: chr17-39221919;