17-41315502-C-T

Variant names:

• chr17-41315502-C-T
• NM_031964.2:c.149G>A

Variant summary

Our verdict is Likely benign. Variant got -2 ACMG points: 2P and 4B. PM2 BP4_Strong

The NM_031964.2(KRTAP17-1):​c.149G>A​(p.Gly50Asp) variant causes a missense change involving the alteration of a non-conserved nucleotide. The variant was absent in control chromosomes in GnomAD project. In-silico tool predicts a benign outcome for this variant. 13/20 in silico tools predict a benign outcome for this variant. Variant has been reported in ClinVar as Uncertain significance (★).

• Frequency: Genomes: not found (cov: 28)
• Consequence: KRTAP17-1 NM_031964.2 missense
• Clinical Significance: Uncertain significance criteria provided, single submitter U:1
• Conservation: PhyloP100: -1.61

Genes affected

KRTAP17-1 (HGNC:18917): (keratin associated protein 17-1) 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]

ACMG classification

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=0.056953102).

Transcripts

RefSeq

Gene	Transcript	HGVSc	HGVSp	Effect	Exon rank	MANE	Protein	UniProt
KRTAP17-1	NM_031964.2	c.149G>A	p.Gly50Asp	missense_variant	Exon 1 of 1	ENST00000334202.5	NP_114170.1

Ensembl

Gene	Transcript	HGVSc	HGVSp	Effect	Exon rank	TSL	MANE	Protein	Appris	UniProt
KRTAP17-1	ENST00000334202.5	c.149G>A	p.Gly50Asp	missense_variant	Exon 1 of 1	6	NM_031964.2	ENSP00000333993.3

Frequencies

GnomAD3 genomes Cov.: 28

GnomAD4 exome Cov.: 28

GnomAD4 genome Cov.: 28

ClinVar

Significance: Uncertain significance

Submissions summary: Uncertain:1

Revision: criteria provided, single submitter

Submissions by phenotype

not specified Uncertain:1

Mar 20, 2023

Ambry Genetics

Significance: Uncertain significance

Review Status: criteria provided, single submitter

Collection Method: clinical testing

The c.149G>A (p.G50D) alteration is located in exon 1 (coding exon 1) of the KRTAP17-1 gene. This alteration results from a G to A substitution at nucleotide position 149, causing the glycine (G) at amino acid position 50 to be replaced by an aspartic acid (D). 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	0.37
BayesDel_addAF	Benign	-0.15	T
BayesDel_noAF	Benign	-0.45
CADD	Benign	6.1
DANN	Benign	0.86
DEOGEN2	Benign	0.0042	T
Eigen	Benign	-0.84
Eigen_PC	Benign	-0.83
FATHMM_MKL	Benign	0.023	N
M_CAP	Benign	0.0057	T
MetaRNN	Benign	0.057	T
MetaSVM	Benign	-1.0	T
MutationAssessor	Uncertain	2.1	M
PrimateAI	Benign	0.34	T
PROVEAN	Benign	0.50	N
REVEL	Benign	0.084
Sift4G	Benign	0.063	T
Polyphen		0.0020	B
Vest4		0.23
MutPred		0.17		Gain of loop (P = 0.0851);
MVP		0.043
MPC		0.30
ClinPred		0.042	T
GERP RS		1.9
Varity_R		0.13
gMVP		0.051

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

No publications associated with this variant yet.

Other links and lift over

hg19: chr17-39471754;