17-41105698-T-C

Variant names:

• chr17-41105698-T-C
• rs1437805128
• NM_001146041.1:c.310T>C

Variant summary

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

The NM_001146041.1(KRTAP4-9):​c.310T>C​(p.Cys104Arg) 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: 29)
  • Exomes 𝑓: 7.0e-7 (0 hom.)
  • Failed GnomAD Quality Control
• Consequence: KRTAP4-9 NM_001146041.1 missense
• Clinical Significance: Uncertain significance criteria provided, single submitter U:1
• Conservation: PhyloP100: 0.925

Genes affected

KRTAP4-9 (HGNC:18910): (keratin associated protein 4-9) Involved in aging and hair cycle. Predicted to be located in cytosol. [provided by Alliance of Genome Resources, Apr 2022]

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
KRTAP4-9	NM_001146041.1	c.310T>C	p.Cys104Arg	missense_variant	Exon 1 of 1	ENST00000391415.2	NP_001139513.1

Ensembl

Gene	Transcript	HGVSc	HGVSp	Effect	Exon rank	TSL	MANE	Protein	Appris	UniProt
KRTAP4-9	ENST00000391415.2	c.310T>C	p.Cys104Arg	missense_variant	Exon 1 of 1	6	NM_001146041.1	ENSP00000375234.1

Frequencies

GnomAD3 genomes Cov.: 29

GnomAD3 exomes AF: 0.00000806 AC: 2 AN: 247986 Hom.: 0 AF XY: 0.00000741 AC XY: 1 AN XY: 134934

Gnomad AFR exome AF: 0.00

Gnomad AMR exome AF: 0.0000582

Gnomad ASJ exome AF: 0.00

Gnomad EAS exome AF: 0.00

Gnomad SAS exome AF: 0.00

Gnomad FIN exome AF: 0.00

Gnomad NFE exome AF: 0.00

Gnomad OTH exome AF: 0.00

GnomAD4 exome Data not reliable, filtered out with message: AS_VQSR AF: 7.04e-7 AC: 1 AN: 1420196 Hom.: 0 Cov.: 34 AF XY: 0.00 AC XY: 0 AN XY: 705798

Gnomad4 AFR exome AF: 0.00

Gnomad4 AMR exome AF: 0.0000248

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: 0.00

Gnomad4 OTH exome AF: 0.00

GnomAD4 genome Cov.: 29

Bravo AF: 0.00000756

ClinVar

Significance: Uncertain significance

Submissions summary: Uncertain:1

Revision: criteria provided, single submitter

Submissions by phenotype

not specified Uncertain:1

May 10, 2024

Ambry Genetics

Significance: Uncertain significance

Review Status: criteria provided, single submitter

Collection Method: clinical testing

The c.310T>C (p.C104R) alteration is located in exon 1 (coding exon 1) of the KRTAP4-9 gene. This alteration results from a T to C substitution at nucleotide position 310, causing the cysteine (C) at amino acid position 104 to be replaced by an arginine (R). 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	0.42
BayesDel_addAF	Benign	-0.18	T
BayesDel_noAF	Benign	-0.32
CADD	Benign	19
DANN	Benign	0.90
DEOGEN2	Benign	0.19	T;.
Eigen	Uncertain	0.20
Eigen_PC	Benign	-0.069
FATHMM_MKL	Benign	0.71	D
LIST_S2	Benign	0.63	T;D
M_CAP	Benign	0.027	D
MetaRNN	Uncertain	0.53	D;D
MetaSVM	Benign	-0.38	T
MutationAssessor	Pathogenic	4.0	H;.
PrimateAI	Benign	0.29	T
PROVEAN	Pathogenic	-9.3	D;.
REVEL	Benign	0.12
Sift	Uncertain	0.0020	D;.
Sift4G	Pathogenic	0.0	D;D
Polyphen		1.0	D;.
Vest4		0.45
MutPred		0.54		Gain of solvent accessibility (P = 0.0971);.;
MVP		0.33
MPC		0.31
ClinPred		0.47	T
GERP RS		2.1
Varity_R		0.69
gMVP		0.083

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: rs1437805128; hg19: chr17-39261950;