21-44600726-C-A

Position:

• chr21-44600726-C-A

Variant summary

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

The NM_198689.3(KRTAP10-7):​c.105C>A​(p.Asp35Glu) 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. 12/17 in silico tools predict a benign outcome for this variant. Variant has been reported in ClinVar as Uncertain significance (★).

• Frequency: Genomes: not found (cov: 32)
• Consequence: KRTAP10-7 NM_198689.3 missense
• Clinical Significance: Uncertain significance criteria provided, single submitter U:1
• Conservation: PhyloP100: -0.331

Genes affected

KRTAP10-7 (HGNC:22970): (keratin associated protein 10-7) Enables identical protein binding activity. Predicted to be located in cytosol. [provided by Alliance of Genome Resources, Apr 2022]

TSPEAR (HGNC:1268): (thrombospondin type laminin G domain and EAR repeats) This gene encodes a protein that contains a N-terminal thrombospondin-type laminin G domain and several tandem arranged epilepsy-associated repeats (EARs). A mutation in this gene is the cause of autosomal recessive deafness-98. Alternate splicing results in multiple transcript variants. [provided by RefSeq, Dec 2012]

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=0.14018077).

Transcripts

RefSeq

Gene	Transcript	HGVSc	HGVSp	Effect	#exon/exons	MANE	Protein	UniProt
KRTAP10-7	NM_198689.3	c.105C>A	p.Asp35Glu	missense_variant	1/1	ENST00000609664.2	NP_941962.1
TSPEAR	NM_144991.3	c.83-32721G>T		intron_variant		ENST00000323084.9	NP_659428.2
TSPEAR	NM_001272037.2	c.-122-32721G>T		intron_variant			NP_001258966.1

Ensembl

Gene	Transcript	HGVSc	HGVSp	Effect	#exon/exons	TSL	MANE	Protein	Appris	UniProt
KRTAP10-7	ENST00000609664.2	c.105C>A	p.Asp35Glu	missense_variant	1/1		NM_198689.3	ENSP00000476821	P1
TSPEAR	ENST00000323084.9	c.83-32721G>T		intron_variant		1	NM_144991.3	ENSP00000321987	P1
TSPEAR	ENST00000642437.1	c.*28-32721G>T		intron_variant, NMD_transcript_variant				ENSP00000496535

Frequencies

GnomAD3 genomes Cov.: 32

GnomAD4 exome Cov.: 32

GnomAD4 genome Cov.: 32

ClinVar

Significance: Uncertain significance

Submissions summary: Uncertain:1

Revision: criteria provided, single submitter

Submissions by phenotype

not specified Uncertain:1

Uncertain significance, criteria provided, single submitter

clinical testing

Ambry Genetics

Oct 27, 2023

The c.105C>A (p.D35E) alteration is located in exon 1 (coding exon 1) of the KRTAP10-7 gene. This alteration results from a C to A substitution at nucleotide position 105, causing the aspartic acid (D) at amino acid position 35 to be replaced by a glutamic acid (E). 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	0.25
BayesDel_addAF	Benign	-0.22	T
BayesDel_noAF	Benign	-0.56
CADD	Benign	7.0
DANN	Benign	0.97
DEOGEN2	Benign	0.18	T
Eigen	Benign	-1.0
Eigen_PC	Benign	-1.1
FATHMM_MKL	Benign	0.090	N
LIST_S2	Benign	0.74	T
M_CAP	Benign	0.0057	T
MetaRNN	Benign	0.14	T
MetaSVM	Benign	-0.99	T
MutationAssessor	Uncertain	2.4	M
MutationTaster	Benign	1.0	D;N
PrimateAI	Benign	0.31	T
Sift4G	Benign	0.19	T
Vest4		0.20
MutPred		0.21		Gain of solvent accessibility (P = 0.0374);
MVP		0.35
ClinPred		0.14	T
GERP RS		-0.50
Varity_R		0.034
gMVP		0.039

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

No publications associated with this variant yet.

Other links and lift over

hg19: chr21-46020626;