chr17-41084289-G-A

Position:

• chr17-41084289-G-A

Variant summary

Our verdict is Uncertain significance. Variant got 0 ACMG points: 2P and 2B. PM2 BP4_Moderate

The NM_033061.4(KRTAP4-7):​c.83G>A​(p.Ser28Asn) 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. 13/18 in silico tools predict a benign outcome for this variant. No clinical diagnostic laboratories have submitted clinical-significance assessments for this variant to ClinVar.

• Frequency: Genomes: not found (cov: 32)
• Consequence: KRTAP4-7 NM_033061.4 missense
• Clinical Significance: Likely benign criteria provided, single submitter B:1
• Conservation: PhyloP100: -0.461

Genes affected

KRTAP4-7 (HGNC:18898): (keratin associated protein 4-7) 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, Mar 2009]

ACMG classification

Verdict is Uncertain_significance. Variant got 0 ACMG points.

• PM2: Very rare variant in population databases, with high coverage
• BP4: Computational evidence support a benign effect (MetaRNN=0.12972361).

Transcripts

RefSeq

Gene	Transcript	HGVSc	HGVSp	Effect	#exon/exons	MANE	Protein	UniProt
KRTAP4-7	NM_033061.4	c.83G>A	p.Ser28Asn	missense_variant	1/1	ENST00000391417.6	NP_149050.3

Ensembl

Gene	Transcript	HGVSc	HGVSp	Effect	#exon/exons	TSL	MANE	Protein	Appris	UniProt
KRTAP4-7	ENST00000391417.6	c.83G>A	p.Ser28Asn	missense_variant	1/1	6	NM_033061.4	ENSP00000375236.4

Frequencies

GnomAD3 genomes Cov.: 32

GnomAD4 exome Cov.: 152

GnomAD4 genome Cov.: 32

Bravo AF: 0.00000378

ClinVar

Significance: Likely benign

Submissions summary: Benign:1

Revision: criteria provided, single submitter

Submissions by phenotype

not specified Benign:1

Likely benign, criteria provided, single submitter

clinical testing

Ambry Genetics

Nov 26, 2024

This alteration is classified as likely benign based on a combination of the following: seen in unaffected individuals, population frequency, intact protein function, lack of segregation with disease, co-occurrence, RNA analysis, in silico models, amino acid conservation, lack of disease association in case-control studies, and/or the mechanism of disease or impacted region is inconsistent with a known cause of pathogenicity. -

Computational scores

Source: dbNSFP v4.3

Name	Calibrated prediction	Score	Prediction
BayesDel_addAF	Benign	-0.35	T
BayesDel_noAF	Benign	-0.73
CADD	Benign	9.3
DANN	Benign	0.59
Eigen	Benign	-1.4
Eigen_PC	Benign	-1.5
FATHMM_MKL	Benign	0.090	N
LIST_S2	Benign	0.20	.;T
M_CAP	Benign	0.0018	T
MetaRNN	Benign	0.13	T;T
MetaSVM	Benign	-0.96	T
PrimateAI	Benign	0.21	T
PROVEAN	Benign	-2.1	N;.
REVEL	Benign	0.077
Sift	Benign	0.042	D;.
Sift4G	Uncertain	0.033	D;D
Vest4		0.19
MutPred		0.32		Gain of relative solvent accessibility (P = 0.0522);Gain of relative solvent accessibility (P = 0.0522);
MVP		0.085
MPC		0.033
ClinPred		0.072	T
GERP RS		-4.4
gMVP		0.091

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

LitVar

Other links and lift over

dbSNP: rs2013597632; hg19: chr17-39240541;