chr11-121168184-TC-GA

Position:

• chr11-121168184-TC-GA

Variant summary

Our verdict is Uncertain significance. Variant got 5 ACMG points: 5P and 0B. PM1 PM2 PP3

The NM_005422.4(TECTA):​c.5717_5718inv​(p.Ile1906Arg) variant causes a missense change involving the alteration of a conserved nucleotide. The variant was absent in control chromosomes in GnomAD project. Variant has been reported in ClinVar as Uncertain significance (★).

• Frequency: Genomes: not found (cov: 33)
• Consequence: TECTA NM_005422.4 missense
• Clinical Significance: Uncertain significance criteria provided, single submitter U:1
• Conservation: PhyloP100: 7.64

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:):

ACMG classification

Verdict is Uncertain_significance. Variant got 5 ACMG points.

• PM1: In a domain ZP (size 254) in uniprot entity TECTA_HUMAN there are 13 pathogenic changes around while only 3 benign (81%) in NM_005422.4
• PM2: Very rare variant in population databases, with high coverage
• PP3: No computational evidence supports a deleterious effect, but strongly conserved according to phyloP

Transcripts

RefSeq

Gene	Transcript	HGVSc	HGVSp	Effect	#exon/exons	MANE	Protein	UniProt
TECTA	NM_005422.4	c.5717_5718inv	p.Ile1906Arg	missense_variant	19/24	ENST00000392793.6	NP_005413.2
TBCEL-TECTA	NM_001378761.1	c.6659_6660inv	p.Ile2220Arg	missense_variant	25/30		NP_001365690.1

Ensembl

Gene	Transcript	HGVSc	HGVSp	Effect	#exon/exons	TSL	MANE	Protein	Appris	UniProt
TECTA	ENST00000392793.6	c.5717_5718inv	p.Ile1906Arg	missense_variant	19/24	5	NM_005422.4	ENSP00000376543	P4

Frequencies

GnomAD3 genomes Cov.: 33

We have no GnomAD4 exomes data on this position. Probably position not covered by the project.

GnomAD4 genome Cov.: 33

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

Feb 01, 2014

Variant classified as Uncertain Significance - Favor Pathogenic. The Ile1906Arg variant in TECTA has not been previously reported in individuals with hearing lo ss or in large population studies. Computational analyses (biochemical amino aci d properties, conservation, AlignGVGD, PolyPhen2, and SIFT) suggest that the Ile 1906Arg variant may impact the protein, though this information is not predictiv e enough to determine pathogenicity. In summary, the clinical significance of t his variant cannot be determined without additional data. -

Computational scores

Source: dbNSFP v4.3

Splicing

Find out detailed SpliceAI scores and Pangolin per-transcript scores at spliceailookup.broadinstitute.org

Publications

LitVar

Other links and lift over

dbSNP: rs727504731; hg19: chr11-121038893;