rs1555132232

Variant names:

• chr11-121187966-G-T
• rs1555132232
• NM_005422.4:c.6134G>T

Variant summary

Our verdict is Likely pathogenic. The variant received 8 ACMG points: 8P and 0B. PM1 PM2 PP3_Strong

The NM_005422.4(TECTA):​c.6134G>T​(p.Cys2045Phe) variant causes a missense change involving the alteration of a conserved nucleotide. The variant was absent in control chromosomes in GnomAD project. In-silico tool predicts a pathogenic outcome for this variant. Variant has been reported in ClinVar as Uncertain significance (★). Synonymous variant affecting the same amino acid position (i.e. C2045C) has been classified as Likely benign.

• Frequency: Genomes: not found (cov: 33)
• Consequence: TECTA NM_005422.4 missense
• Clinical Significance: Uncertain significance criteria provided, single submitter U:1
• Conservation: PhyloP100: 9.56
• Publications: 0 publications found

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]

ENSG00000299284 (HGNC:):

ACMG classification

Our verdict: Likely_pathogenic. The variant received 8 ACMG points.

• PM1: In a domain ZP (size 254) in uniprot entity TECTA_HUMAN there are 19 pathogenic changes around while only 8 benign (70%) in NM_005422.4
• PM2: Very rare variant in population databases, with high coverage
• PP3: MetaRNN computational evidence supports a deleterious effect, 0.988

Transcripts

RefSeq

Gene	Transcript	HGVSc	HGVSp	Effect	Exon rank	MANE	Protein	UniProt
TECTA	NM_005422.4	c.6134G>T	p.Cys2045Phe	missense_variant	Exon 21 of 24	ENST00000392793.6	NP_005413.2
TBCEL-TECTA	NM_001378761.1	c.7076G>T	p.Cys2359Phe	missense_variant	Exon 27 of 30		NP_001365690.1

Ensembl

Gene	Transcript	HGVSc	HGVSp	Effect	Exon rank	TSL	MANE	Protein	Appris	UniProt
TECTA	ENST00000392793.6	c.6134G>T	p.Cys2045Phe	missense_variant	Exon 21 of 24	5	NM_005422.4	ENSP00000376543.1

Frequencies

GnomAD3 genomes Cov.: 33

GnomAD4 exome Cov.: 31

GnomAD4 genome Cov.: 33

ClinVar

Significance: Uncertain significance

Submissions summary: Uncertain:1

Revision: criteria provided, single submitter

Submissions by phenotype

not specified Uncertain:1

Jun 20, 2016

Laboratory for Molecular Medicine, Mass General Brigham Personalized Medicine

Significance: Uncertain significance

Review Status: criteria provided, single submitter

Collection Method: clinical testing

The p.Cys2045Phe variant in TECTA has not been previously reported in individual s with hearing loss and was absent from large population studies. Computational prediction tools and conservation analyses suggest that this variant may impact the protein, though this information is not predictive enough to determine patho genicity. In summary, the clinical significance of the p.Cys2045Phe variant is u ncertain. -

Computational scores

Source: dbNSFP v4.3

Name	Calibrated prediction	Score	Prediction
AlphaMissense	Pathogenic	0.99
BayesDel_addAF	Pathogenic	0.45	D
BayesDel_noAF	Pathogenic	0.40
CADD	Pathogenic	31
DANN	Uncertain	0.99
DEOGEN2	Pathogenic	0.87	D;.;D
Eigen	Pathogenic	0.97
Eigen_PC	Pathogenic	0.93
FATHMM_MKL	Pathogenic	0.99	D
LIST_S2	Uncertain	0.90	.;D;D
M_CAP	Pathogenic	0.41	D
MetaRNN	Pathogenic	0.99	D;D;D
MetaSVM	Pathogenic	0.85	D
MutationAssessor	Uncertain	2.4	M;.;M
PhyloP100		9.6
PrimateAI	Pathogenic	0.83	D
PROVEAN	Uncertain	-4.0	D;.;D
REVEL	Pathogenic	0.92
Sift	Uncertain	0.0010	D;.;D
Sift4G	Pathogenic	0.0010	D;.;D
Polyphen		1.0	D;.;D
Vest4		0.98
MutPred		0.96		Gain of catalytic residue at C2045 (P = 0.0412);.;Gain of catalytic residue at C2045 (P = 0.0412);
MVP		0.98
MPC		1.3
ClinPred		1.0	D
GERP RS		5.7
Varity_R		0.96
gMVP		0.99
Mutation Taster		=5/95	disease causing

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

Other links and lift over

dbSNP: rs1555132232; hg19: chr11-121058675;