rs876658016

Positions:

• chr11-121130022-C-G
• chr11-121130022-C-T

Variant summary

Our verdict is Uncertain significance. Variant got 3 ACMG points: 3P and 0B. PM2 PP3

The NM_005422.4(TECTA):​c.2752C>G​(p.Pro918Ala) variant causes a missense change involving the alteration of a conserved nucleotide. The variant allele was found at a frequency of 0.00000137 in 1,458,882 control chromosomes in the GnomAD database, with no homozygous occurrence. In-silico tool predicts a pathogenic outcome for this variant. Variant has been reported in ClinVar as Uncertain significance (★).

• Frequency:
  • Genomes: not found (cov: 33)
  • Exomes 𝑓: 0.0000014 (0 hom.)
• Consequence: TECTA NM_005422.4 missense
• Clinical Significance: Uncertain significance criteria provided, single submitter U:1
• Conservation: PhyloP100: 7.74

Genes affected

TECTA (HGNC:11720): (tectorin alpha) The tectorial membrane is an extracellular matrix of the inner ear that contacts the stereocilia bundles of specialized sensory hair cells. Sound induces movement of these hair cells relative to the tectorial membrane, deflects the stereocilia, and leads to fluctuations in hair-cell membrane potential, transducing sound into electrical signals. Alpha-tectorin is one of the major noncollagenous components of the tectorial membrane. Mutations in the TECTA gene have been shown to be responsible for autosomal dominant nonsyndromic hearing impairment and a recessive form of sensorineural pre-lingual non-syndromic deafness. [provided by RefSeq, Jul 2008]

TBCEL-TECTA (HGNC:54857): (TBCEL-TECTA readthrough) Predicted to enable alpha-tubulin binding activity. Predicted to be involved in microtubule cytoskeleton organization; post-chaperonin tubulin folding pathway; and tubulin complex assembly. Predicted to be active in cytoplasm. [provided by Alliance of Genome Resources, Apr 2022]

ACMG classification

Verdict is Uncertain_significance. Variant got 3 ACMG points.

• PM2: Very rare variant in population databases, with high coverage
• PP3: MetaRNN computational evidence supports a deleterious effect, 0.824

Transcripts

RefSeq

Gene	Transcript	HGVSc	HGVSp	Effect	#exon/exons	MANE	Protein	UniProt
TECTA	NM_005422.4	c.2752C>G	p.Pro918Ala	missense_variant	10/24	ENST00000392793.6	NP_005413.2
TBCEL-TECTA	NM_001378761.1	c.3709C>G	p.Pro1237Ala	missense_variant	16/30		NP_001365690.1

Ensembl

Gene	Transcript	HGVSc	HGVSp	Effect	#exon/exons	TSL	MANE	Protein	Appris	UniProt
TECTA	ENST00000392793.6	c.2752C>G	p.Pro918Ala	missense_variant	10/24	5	NM_005422.4	ENSP00000376543.1
TECTA	ENST00000264037.2	c.2752C>G	p.Pro918Ala	missense_variant	9/23	1		ENSP00000264037.2
TECTA	ENST00000642222.1	c.2752C>G	p.Pro918Ala	missense_variant	10/24			ENSP00000493855.1
TECTA	ENST00000645008.1	c.58C>G	p.Pro20Ala	missense_variant	1/15			ENSP00000496274.1

Frequencies

GnomAD3 genomes Cov.: 33

GnomAD3 exomes AF: 0.00000800 AC: 2 AN: 250036 Hom.: 0 AF XY: 0.00000740 AC XY: 1 AN XY: 135094

Gnomad AFR exome AF: 0.00

Gnomad AMR exome AF: 0.0000581

Gnomad ASJ exome AF: 0.00

Gnomad EAS exome AF: 0.00

Gnomad SAS exome AF: 0.00

Gnomad FIN exome AF: 0.00

Gnomad NFE exome AF: 0.00

Gnomad OTH exome AF: 0.00

GnomAD4 exome AF: 0.00000137 AC: 2 AN: 1458882 Hom.: 0 Cov.: 31 AF XY: 0.00000138 AC XY: 1 AN XY: 725148

Gnomad4 AFR exome AF: 0.00

Gnomad4 AMR exome AF: 0.0000449

Gnomad4 ASJ exome AF: 0.00

Gnomad4 EAS exome AF: 0.00

Gnomad4 SAS exome AF: 0.00

Gnomad4 FIN exome AF: 0.00

Gnomad4 NFE exome AF: 0.00

Gnomad4 OTH exome AF: 0.00

GnomAD4 genome Cov.: 33

Bravo AF: 0.00000378

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

Laboratory for Molecular Medicine, Mass General Brigham Personalized Medicine

Jan 19, 2016

The p.Pro918Ala variant in TECTA has not been previously reported in individuals with hearing loss or in large population studies. Computational prediction tool s and conservation analysis suggest that this variant may impact the protein, th ough this information is not predictive enough to determine pathogenicity. In su mmary, the clinical significance of the p.Pro918Ala variant is uncertain. -

Computational scores

Source: dbNSFP v4.3

Name	Calibrated prediction	Score	Prediction
AlphaMissense	Benign	0.31
BayesDel_addAF	Uncertain	0.060	T
BayesDel_noAF	Uncertain	0.020
CADD	Uncertain	25
DANN	Uncertain	1.0
DEOGEN2	Benign	0.33	T;.;T
Eigen	Pathogenic	0.77
Eigen_PC	Pathogenic	0.79
FATHMM_MKL	Pathogenic	0.98	D
LIST_S2	Uncertain	0.90	.;D;D
M_CAP	Uncertain	0.087	D
MetaRNN	Pathogenic	0.82	D;D;D
MetaSVM	Uncertain	0.0028	D
MutationAssessor	Benign	1.6	L;.;L
PrimateAI	Uncertain	0.68	T
PROVEAN	Uncertain	-3.7	D;.;D
REVEL	Uncertain	0.64
Sift	Benign	0.16	T;.;T
Sift4G	Pathogenic	0.0	D;.;D
Polyphen		1.0	D;.;D
Vest4		0.72
MutPred		0.54		Gain of catalytic residue at P918 (P = 0.0366);Gain of catalytic residue at P918 (P = 0.0366);Gain of catalytic residue at P918 (P = 0.0366);
MVP		0.94
MPC		0.96
ClinPred		0.94	D
GERP RS		5.8
Varity_R		0.18
gMVP		0.73

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

Publications

LitVar

Other links and lift over

dbSNP: rs876658016; hg19: chr11-121000731;