11-121190739-C-T

Position:

• chr11-121190739-C-T

Variant summary

Our verdict is Likely benign. Variant got -5 ACMG points: 0P and 5B. BP4_Strong BP6

The NM_005422.4(TECTA):​c.6401C>T​(p.Thr2134Met) variant causes a missense change involving the alteration of a non-conserved nucleotide. The variant allele was found at a frequency of 0.0000304 in 1,613,706 control chromosomes in the GnomAD database, with no homozygous occurrence. In-silico tool predicts a benign outcome for this variant. 15/21 in silico tools predict a benign outcome for this variant. Variant has been reported in ClinVar as Conflicting classifications of pathogenicity (no stars).

• Frequency:
  • Genomes: 𝑓 0.000059 (0 hom., cov: 32)
  • Exomes 𝑓: 0.000027 (0 hom.)
• Consequence: TECTA NM_005422.4 missense
• Clinical Significance: Conflicting classifications of pathogenicity criteria provided, conflicting classifications U:2 B:2
• Conservation: PhyloP100: -0.279

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]

TECTA (HGNC:):

ACMG classification

Verdict is Likely_benign. Variant got -5 ACMG points.

• BP4: Computational evidence support a benign effect (MetaRNN=0.027450413).
• BP6: Variant 11-121190739-C-T is Benign according to our data. Variant chr11-121190739-C-T is described in ClinVar as [Conflicting_classifications_of_pathogenicity]. Clinvar id is 504680.We mark this variant Likely_benign, oryginal submissions are: {Likely_benign=2, Uncertain_significance=2}.

Transcripts

RefSeq

Gene	Transcript	HGVSc	HGVSp	Effect	#exon/exons	MANE	Protein	UniProt
TECTA	NM_005422.4	c.6401C>T	p.Thr2134Met	missense_variant	24/24	ENST00000392793.6	NP_005413.2
TBCEL-TECTA	NM_001378761.1	c.7343C>T	p.Thr2448Met	missense_variant	30/30		NP_001365690.1

Ensembl

Gene	Transcript	HGVSc	HGVSp	Effect	#exon/exons	TSL	MANE	Protein	Appris	UniProt
TECTA	ENST00000392793.6	c.6401C>T	p.Thr2134Met	missense_variant	24/24	5	NM_005422.4	ENSP00000376543.1

Frequencies

GnomAD3 genomes AF: 0.0000592 AC: 9 AN: 152132 Hom.: 0 Cov.: 32

Gnomad AFR AF: 0.000145

Gnomad AMI AF: 0.00

Gnomad AMR AF: 0.0000655

Gnomad ASJ AF: 0.00

Gnomad EAS AF: 0.00

Gnomad SAS AF: 0.00

Gnomad FIN AF: 0.00

Gnomad MID AF: 0.00

Gnomad NFE AF: 0.0000294

Gnomad OTH AF: 0.00

GnomAD3 exomes AF: 0.0000159 AC: 4 AN: 251384 Hom.: 0 AF XY: 0.00000736 AC XY: 1 AN XY: 135866

Gnomad AFR exome AF: 0.00

Gnomad AMR exome AF: 0.00

Gnomad ASJ exome AF: 0.00

Gnomad EAS exome AF: 0.0000544

Gnomad SAS exome AF: 0.00

Gnomad FIN exome AF: 0.00

Gnomad NFE exome AF: 0.0000264

Gnomad OTH exome AF: 0.00

GnomAD4 exome AF: 0.0000274 AC: 40 AN: 1461574 Hom.: 0 Cov.: 30 AF XY: 0.0000330 AC XY: 24 AN XY: 727078

Gnomad4 AFR exome AF: 0.00

Gnomad4 AMR exome AF: 0.00

Gnomad4 ASJ exome AF: 0.00

Gnomad4 EAS exome AF: 0.0000756

Gnomad4 SAS exome AF: 0.0000464

Gnomad4 FIN exome AF: 0.0000187

Gnomad4 NFE exome AF: 0.0000261

Gnomad4 OTH exome AF: 0.0000497

GnomAD4 genome AF: 0.0000592 AC: 9 AN: 152132 Hom.: 0 Cov.: 32 AF XY: 0.0000404 AC XY: 3 AN XY: 74318

Gnomad4 AFR AF: 0.000145

Gnomad4 AMR AF: 0.0000655

Gnomad4 ASJ AF: 0.00

Gnomad4 EAS AF: 0.00

Gnomad4 SAS AF: 0.00

Gnomad4 FIN AF: 0.00

Gnomad4 NFE AF: 0.0000294

Gnomad4 OTH AF: 0.00

Alfa AF: 0.0000573 Hom.: 0

Bravo AF: 0.0000567

ESP6500AA AF: 0.00 AC: 0

ESP6500EA AF: 0.000116 AC: 1

ExAC AF: 0.0000247 AC: 3

Asia WGS AF: 0.000289 AC: 1 AN: 3478

EpiCase AF: 0.0000545

EpiControl AF: 0.0000593

ClinVar

Significance: Conflicting classifications of pathogenicity

Submissions summary: Uncertain:2 Benign:2

Revision: criteria provided, conflicting classifications

Submissions by phenotype

not provided Uncertain:2 Benign:1

Likely benign, criteria provided, single submitter	clinical testing	CeGaT Center for Human Genetics Tuebingen	Jun 01, 2019	- -
Uncertain significance, criteria provided, single submitter	clinical testing	GeneDx	Jan 08, 2023	In silico analysis supports that this missense variant does not alter protein structure/function; Has not been previously published as pathogenic or benign to our knowledge -
Uncertain significance, criteria provided, single submitter	clinical testing	Labcorp Genetics (formerly Invitae), Labcorp	Aug 24, 2022	In summary, the available evidence is currently insufficient to determine the role of this variant in disease. Therefore, it has been classified as a Variant of Uncertain Significance. Algorithms developed to predict the effect of missense changes on protein structure and function output the following: SIFT: "Tolerated"; PolyPhen-2: "Benign"; Align-GVGD: "Class C0". The methionine amino acid residue is found in multiple mammalian species, which suggests that this missense change does not adversely affect protein function. ClinVar contains an entry for this variant (Variation ID: 504680). This variant has not been reported in the literature in individuals affected with TECTA-related conditions. This variant is present in population databases (rs372282487, gnomAD 0.008%). This sequence change replaces threonine, which is neutral and polar, with methionine, which is neutral and non-polar, at codon 2134 of the TECTA protein (p.Thr2134Met). -

not specified Benign:1

Likely benign, criteria provided, single submitter

clinical testing

Laboratory for Molecular Medicine, Mass General Brigham Personalized Medicine

Jun 09, 2016

p.Thr2134Met in exon 23 of TECTA: This variant is not expected to have clinical significance because the threonine (Thr) at position 2134 is not conserved in ma mmals or evolutionary distant species, with 10 mammals having a methionine (Met) at this position. It has been identified in 3/66304 European chromosomes by t he Exome Aggregation Consortium (ExAC, http://exac.broadinstitute.org). -

Computational scores

Source: dbNSFP v4.3

Name	Calibrated prediction	Score	Prediction
AlphaMissense	Benign	0.071
BayesDel_addAF	Benign	-0.40	T
BayesDel_noAF	Benign	-0.65
CADD	Benign	2.5
DANN	Benign	0.89
DEOGEN2	Benign	0.20	T;.;T
Eigen	Benign	-1.4
Eigen_PC	Benign	-1.4
FATHMM_MKL	Benign	0.015	N
LIST_S2	Benign	0.68	.;T;T
M_CAP	Benign	0.0042	T
MetaRNN	Benign	0.027	T;T;T
MetaSVM	Benign	-1.0	T
MutationAssessor	Benign	1.1	L;.;L
PrimateAI	Benign	0.27	T
PROVEAN	Benign	-0.70	N;.;N
REVEL	Benign	0.014
Sift	Benign	0.26	T;.;T
Sift4G	Benign	0.13	T;.;T
Polyphen		0.0	B;.;B
Vest4		0.12
MVP		0.34
MPC		0.34
ClinPred		0.032	T
GERP RS		-2.4
Varity_R		0.021
gMVP		0.52

Splicing

Name	Calibrated prediction	Score	Prediction
SpliceAI score (max)		0.040		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: rs372282487; hg19: chr11-121061448;