21-44591821-A-G

Variant names:

• chr21-44591821-A-G
• rs1601457139
• NM_198688.3:c.664T>C

Variant summary

Our verdict is Uncertain significance. The variant received 0 ACMG points: 2P and 2B. PM2 BP4_Moderate

The NM_198688.3(KRTAP10-6):​c.664T>C​(p.Ser222Pro) 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. 13/19 in silico tools predict a benign outcome for this variant. Variant has been reported in ClinVar as Uncertain significance (★). Another variant affecting the same amino acid position, but resulting in a different missense (i.e. S222A) has been classified as Uncertain significance.

• Frequency: Genomes: not found (cov: 31)
• Consequence: KRTAP10-6 NM_198688.3 missense
• Clinical Significance: Uncertain significance criteria provided, single submitter U:1
• Conservation: PhyloP100: 0.605
• Publications: 0 publications found

Genes affected

KRTAP10-6 (HGNC:20523): (keratin associated protein 10-6) 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]

TSPEAR Gene-Disease associations (from GenCC):

• ectodermal dysplasia 14, hair/tooth type with or without hypohidrosis

  Inheritance: AR Classification: STRONG, MODERATE Submitted by: Ambry Genetics, Labcorp Genetics (formerly Invitae)
• hearing loss, autosomal recessive

  Inheritance: AR Classification: SUPPORTIVE Submitted by: Orphanet
• autosomal recessive nonsyndromic hearing loss 98

  Inheritance: AR Classification: LIMITED Submitted by: Ambry Genetics, Labcorp Genetics (formerly Invitae)
• nonsyndromic genetic hearing loss

  Inheritance: AR Classification: NO_KNOWN Submitted by: ClinGen

ACMG classification

Our verdict: Uncertain_significance. The variant received 0 ACMG points.

• PM2: Very rare variant in population databases, with high coverage
• BP4: Computational evidence support a benign effect (MetaRNN=0.10370612).

Variant Effect in Transcripts

ACMG analysis was done for transcript: NM_198688.3. You can select a different transcript below to see updated ACMG assignments.

RefSeq Transcripts

Sel.	Gene	Transcript	Tags	HGVSc	HGVSp	Effect	Exon Rank	Protein	UniProt
	KRTAP10-6	NM_198688.3	MANE Select	c.664T>C	p.Ser222Pro	missense	Exon 1 of 1	NP_941961.3	P60371
	TSPEAR	NM_144991.3	MANE Select	c.83-23816T>C		intron	N/A	NP_659428.2
	TSPEAR	NM_001272037.2		c.-122-23816T>C		intron	N/A	NP_001258966.1

Ensembl Transcripts

Sel.	Gene	Transcript	Tags	HGVSc	HGVSp	Effect	Exon Rank	Protein	UniProt
	KRTAP10-6	ENST00000400368.1	TSL:6 MANE Select	c.664T>C	p.Ser222Pro	missense	Exon 1 of 1	ENSP00000383219.1	P60371
	TSPEAR	ENST00000323084.9	TSL:1 MANE Select	c.83-23816T>C		intron	N/A	ENSP00000321987.4	Q8WU66-1
	TSPEAR	ENST00000943283.1		c.83-23816T>C		intron	N/A	ENSP00000613342.1

Frequencies

GnomAD3 genomes Cov.: 31

GnomAD4 exome Cov.: 143

GnomAD4 genome Cov.: 31

ClinVar

ClinVar submissions

Significance: Uncertain significance

Revision: criteria provided, single submitter

Pathogenic	VUS	Benign	Condition
-	1	-	not specified (1)

Computational scores

Source: dbNSFP v4.9

Name	Calibrated prediction	Score	Prediction
AlphaMissense	Benign	0.19
BayesDel_addAF	Benign	-0.25	T
BayesDel_noAF	Benign	-0.60
CADD	Benign	16
DANN	Benign	0.75
Eigen	Benign	-1.1
Eigen_PC	Benign	-1.3
FATHMM_MKL	Benign	0.045	N
M_CAP	Benign	0.00097	T
MetaRNN	Benign	0.10	T
MetaSVM	Benign	-0.92	T
PhyloP100		0.60
PROVEAN	Uncertain	-3.3	D
REVEL	Benign	0.050
Sift	Benign	0.030	D
Sift4G	Uncertain	0.0040	D
Vest4		0.17
MutPred		0.23		Gain of catalytic residue at S222 (P = 0.0873)
MVP		0.085
MPC		0.61
ClinPred		0.13	T
GERP RS		-5.2
gMVP		0.025
Mutation Taster		=96/4	polymorphism

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

Other links and lift over

dbSNP: rs1601457139; hg19: chr21-46011702;