9-137192674-G-T

Variant names:

• chr9-137192674-G-T
• rs146518581
• NM_001128228.3:c.1743C>A

Variant summary

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

The NM_001128228.3(TPRN):​c.1743C>A​(p.Asn581Lys) 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. 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. N581S) has been classified as Uncertain significance.

• Frequency: Genomes: not found (cov: 33)
• Consequence: TPRN NM_001128228.3 missense
• Clinical Significance: Not reported in ClinVar
• Conservation: PhyloP100: -1.78
• Publications: 2 publications found

Genes affected

TPRN (HGNC:26894): (taperin) This locus encodes a sensory epithelial protein. It was defined by linkage analysis in three Pakistani families to lie between D9S1818 (centromeric) and D9SH6 (telomeric). Mutations at this locus have been associated with autosomal recessive deafness. [provided by RefSeq, Oct 2010]

TPRN Gene-Disease associations (from GenCC):

• autosomal recessive nonsyndromic hearing loss 79

  Inheritance: AR Classification: DEFINITIVE, STRONG Submitted by: G2P, PanelApp Australia, Labcorp Genetics (formerly Invitae)
• nonsyndromic genetic hearing loss

  Inheritance: AR Classification: DEFINITIVE Submitted by: ClinGen
• hearing loss, autosomal recessive

  Inheritance: AR Classification: SUPPORTIVE Submitted by: Orphanet

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=0.37796134).

Variant Effect in Transcripts

ACMG analysis was done for transcript: NM_001128228.3. You can select a different transcript below to see updated ACMG assignments.

RefSeq Transcripts

Selected	Gene	Transcript	Tags	HGVSc	HGVSp	Effect	Exon Rank	Protein	UniProt
	TPRN	NM_001128228.3	MANE Select	c.1743C>A	p.Asn581Lys	missense	Exon 2 of 4	NP_001121700.2

Ensembl Transcripts

Selected	Gene	Transcript	Tags	HGVSc	HGVSp	Effect	Exon Rank	Protein	UniProt
	TPRN	ENST00000409012.6	TSL:1 MANE Select	c.1743C>A	p.Asn581Lys	missense	Exon 2 of 4	ENSP00000387100.4
	TPRN	ENST00000477345.1	TSL:1	n.2464C>A		non_coding_transcript_exon	Exon 1 of 3
	TPRN	ENST00000333046.8	TSL:2	c.1137C>A	p.Asn379Lys	missense	Exon 2 of 3	ENSP00000327617.4

Frequencies

GnomAD3 genomes Cov.: 33

GnomAD4 exome Cov.: 31

GnomAD4 genome Cov.: 33

Alfa AF: 0.00 Hom.: 0

Bravo AF: 0.00000378

ClinVar

Not reported in ClinVar

Computational scores

Source: dbNSFP v4.9

Name	Calibrated prediction	Score	Prediction
AlphaMissense	Pathogenic	0.94
BayesDel_addAF	Benign	-0.065	T
BayesDel_noAF	Benign	-0.33
CADD	Benign	14
DANN	Uncertain	0.98
DEOGEN2	Benign	0.22	T
Eigen	Benign	-0.58
Eigen_PC	Benign	-0.79
FATHMM_MKL	Benign	0.26	N
LIST_S2	Benign	0.63	T
M_CAP	Benign	0.060	D
MetaRNN	Benign	0.38	T
MetaSVM	Benign	-0.34	T
MutationAssessor	Pathogenic	3.0	M
PhyloP100		-1.8
PrimateAI	Uncertain	0.74	T
PROVEAN	Uncertain	-3.7	D
REVEL	Benign	0.27
Sift	Uncertain	0.0030	D
Sift4G	Benign	0.11	T
Polyphen		1.0	D
Vest4		0.79
MutPred		0.34		Gain of methylation at N581 (P = 5e-04)
MVP		0.030
ClinPred		0.99	D
GERP RS		-6.7
Varity_R		0.53
gMVP		0.62
Mutation Taster		=26/74	disease causing

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: rs146518581; hg19: chr9-140087126;