chr21-44627256-C-G

Variant names:

• chr21-44627256-C-G
• rs200057010
• NM_198690.3:c.85C>G

Variant summary

Our verdict is Uncertain significance. The variant received 1 ACMG points: 2P and 1B. PM2 BP4

The NM_198690.3(KRTAP10-9):​c.85C>G​(p.Pro29Ala) variant causes a missense change involving the alteration of a non-conserved nucleotide. The variant allele was found at a frequency of 0.00000205 in 1,460,338 control chromosomes in the GnomAD database, with no homozygous occurrence. In-silico tool predicts 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. P29S) has been classified as Uncertain significance.

• Frequency:
  • Genomes: not found (cov: 33)
  • Exomes 𝑓: 0.0000021 (0 hom.)
• Consequence: KRTAP10-9 NM_198690.3 missense
• Clinical Significance: Uncertain significance criteria provided, single submitter U:1
• Conservation: PhyloP100: 0.597
• Publications: 1 publications found

Genes affected

KRTAP10-9 (HGNC:22971): (keratin associated protein 10-9) 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 1 ACMG points.

• PM2: Very rare variant in population databases, with high coverage
• BP4: Computational evidence support a benign effect (MetaRNN=0.27696842).

Variant Effect in Transcripts

ACMG analysis was done for transcript: NM_198690.3. 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
	KRTAP10-9	NM_198690.3	MANE Select	c.85C>G	p.Pro29Ala	missense	Exon 1 of 1	NP_941963.2	P60411-1
	TSPEAR	NM_144991.3	MANE Select	c.83-59251G>C		intron	N/A	NP_659428.2
	TSPEAR	NM_001272037.2		c.-122-59251G>C		intron	N/A	NP_001258966.1

Ensembl Transcripts

Sel.	Gene	Transcript	Tags	HGVSc	HGVSp	Effect	Exon Rank	Protein	UniProt
	KRTAP10-9	ENST00000397911.5	TSL:6 MANE Select	c.85C>G	p.Pro29Ala	missense	Exon 1 of 1	ENSP00000381009.3	P60411-1
	TSPEAR	ENST00000323084.9	TSL:1 MANE Select	c.83-59251G>C		intron	N/A	ENSP00000321987.4	Q8WU66-1
	KRTAP10-9	ENST00000484861.1	TSL:1	n.134C>G		non_coding_transcript_exon	Exon 1 of 2

Frequencies

GnomAD3 genomes Cov.: 33

GnomAD2 exomes AF: 0.0000120 AC: 3 AN: 249330 AF XY: 0.00

Gnomad AFR exome AF: 0.00

Gnomad AMR exome AF: 0.0000580

Gnomad ASJ exome AF: 0.00

Gnomad EAS exome AF: 0.00

Gnomad FIN exome AF: 0.00

Gnomad NFE exome AF: 0.00000884

Gnomad OTH exome AF: 0.00

GnomAD4 exome AF: 0.00000205 AC: 3 AN: 1460338 Hom.: 0 Cov.: 31 AF XY: 0.00 AC XY: 0 AN XY: 726510

African (AFR) AF: 0.00 AC: 0 AN: 33442

American (AMR) AF: 0.0000447 AC: 2 AN: 44710

Ashkenazi Jewish (ASJ) AF: 0.00 AC: 0 AN: 26118

East Asian (EAS) AF: 0.00 AC: 0 AN: 39694

South Asian (SAS) AF: 0.00 AC: 0 AN: 86180

European-Finnish (FIN) AF: 0.00 AC: 0 AN: 53342

Middle Eastern (MID) AF: 0.00 AC: 0 AN: 4624

European-Non Finnish (NFE) AF: 8.99e-7 AC: 1 AN: 1111960

Other (OTH) AF: 0.00 AC: 0 AN: 60268

GnomAD4 genome Cov.: 33

Alfa AF: 0.00 Hom.: 0

Bravo AF: 0.00000378

ExAC AF: 0.00000824 AC: 1

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	0.086
BayesDel_addAF	Benign	-0.26	T
BayesDel_noAF	Benign	-0.44
CADD	Benign	15
DANN	Uncertain	0.98
DEOGEN2	Benign	0.078	T
Eigen	Uncertain	0.34
Eigen_PC	Benign	0.21
FATHMM_MKL	Benign	0.26	N
LIST_S2	Benign	0.83	T
M_CAP	Benign	0.0051	T
MetaRNN	Benign	0.28	T
MetaSVM	Benign	-1.0	T
MutationAssessor	Pathogenic	3.2	M
PhyloP100		0.60
PrimateAI	Benign	0.23	T
PROVEAN	Pathogenic	-7.3	D
REVEL	Benign	0.27
Sift	Benign	0.034	D
Sift4G	Uncertain	0.032	D
Polyphen		0.97	D
Vest4		0.28
MutPred		0.54		Loss of catalytic residue at P29 (P = 0.0658)
MVP		0.30
ClinPred		0.65	D
GERP RS		3.5
PromoterAI		0.0020	Neutral
Varity_R		0.15
gMVP		0.083
Mutation Taster		=79/21	polymorphism

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

Other links and lift over

dbSNP: rs200057010; hg19: chr21-46047173;