21-44697328-G-T

Variant names:

• chr21-44697328-G-T
• rs199900483
• NM_198699.1:c.127G>T

Variant summary

Our verdict is Likely benign. The variant received -2 ACMG points: 2P and 4B. PM2 BP4_Strong

The NM_198699.1(KRTAP10-12):​c.127G>T​(p.Ala43Ser) 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. 14/22 in silico tools predict a benign outcome for this variant. No clinical diagnostic laboratories have submitted clinical-significance assessments for this variant to ClinVar. Another variant affecting the same amino acid position, but resulting in a different missense (i.e. A43T) has been classified as Uncertain significance.

• Frequency: Genomes: not found (cov: 32)
• Consequence: KRTAP10-12 NM_198699.1 missense
• Clinical Significance: Not reported in ClinVar
• Conservation: PhyloP100: -0.347
• Publications: 0 publications found

Genes affected

KRTAP10-12 (HGNC:20533): (keratin associated protein 10-12) 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: Likely_benign. The variant received -2 ACMG points.

• PM2: Very rare variant in population databases, with high coverage
• BP4: Computational evidence support a benign effect (MetaRNN=0.063417494).

Variant Effect in Transcripts

ACMG analysis was done for transcript: NM_198699.1. 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
	KRTAP10-12	NM_198699.1	MANE Select	c.127G>T	p.Ala43Ser	missense	Exon 1 of 1	NP_941972.1	P60413
	TSPEAR	NM_144991.3	MANE Select	c.82+14105C>A		intron	N/A	NP_659428.2
	TSPEAR	NM_001272037.2		c.-184-6722C>A		intron	N/A	NP_001258966.1

Ensembl Transcripts

Sel.	Gene	Transcript	Tags	HGVSc	HGVSp	Effect	Exon Rank	Protein	UniProt
	KRTAP10-12	ENST00000400365.3	TSL:6 MANE Select	c.127G>T	p.Ala43Ser	missense	Exon 1 of 1	ENSP00000383216.3	P60413
	TSPEAR	ENST00000323084.9	TSL:1 MANE Select	c.82+14105C>A		intron	N/A	ENSP00000321987.4	Q8WU66-1
	TSPEAR	ENST00000943283.1		c.82+14105C>A		intron	N/A	ENSP00000613342.1

Frequencies

GnomAD3 genomes Cov.: 32

GnomAD4 exome Cov.: 33

GnomAD4 genome Cov.: 32

ClinVar

Not reported in ClinVar

Computational scores

Source: dbNSFP v4.9

Name	Calibrated prediction	Score	Prediction
AlphaMissense	Benign	0.081
BayesDel_addAF	Benign	-0.25	T
BayesDel_noAF	Benign	-0.59
CADD	Benign	7.5
DANN	Benign	0.92
DEOGEN2	Benign	0.077	T
Eigen	Benign	-1.1
Eigen_PC	Benign	-1.1
FATHMM_MKL	Benign	0.083	N
LIST_S2	Benign	0.041	T
M_CAP	Benign	0.0051	T
MetaRNN	Benign	0.063	T
MetaSVM	Benign	-0.99	T
MutationAssessor	Pathogenic	3.4	M
PhyloP100		-0.35
PrimateAI	Benign	0.20	T
PROVEAN	Uncertain	-2.7	D
REVEL	Benign	0.032
Sift	Benign	0.070	T
Sift4G	Benign	0.13	T
Polyphen		0.043	B
Vest4		0.31
MutPred		0.21		Gain of relative solvent accessibility (P = 0.0104)
MVP		0.067
MPC		0.52
ClinPred		0.50	D
GERP RS		0.51
PromoterAI		-0.010	Neutral
Varity_R		0.10
gMVP		0.029
Mutation Taster		=100/0	polymorphism

Splicing

Name	Calibrated prediction	Score	Prediction
SpliceAI score (max)		0.030		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: rs199900483; hg19: chr21-46117243;