chr9-72694227-G-A

Variant names:

• chr9-72694227-G-A
• rs1663742
• NM_138691.3:c.65-316G>A

Variant summary

Our verdict is Benign. The variant received -14 ACMG points: 0P and 14B. BP4_Strong BP6_Moderate BA1

The NM_138691.3(TMC1):​c.65-316G>A variant causes a intron change involving the alteration of a non-conserved nucleotide. The variant allele was found at a frequency of 0.513 in 151,970 control chromosomes in the GnomAD database, including 21,287 homozygotes. In-silico tool predicts a benign outcome for this variant. Variant has been reported in ClinVar as Benign (★).

• Frequency: Genomes: 𝑓 0.51 (21287 hom., cov: 32)
• Consequence: TMC1 NM_138691.3 intron
• Clinical Significance: Benign criteria provided, single submitter B:1
• Conservation: PhyloP100: -2.17
• Publications: 1 publications found

Genes affected

TMC1 (HGNC:16513): (transmembrane channel like 1) This gene is considered a member of a gene family predicted to encode transmembrane proteins. The specific function of this gene is unknown; however, it is known to be required for normal function of cochlear hair cells. Mutations in this gene have been associated with progressive postlingual hearing loss and profound prelingual deafness. [provided by RefSeq, Jul 2008]

TMC1 Gene-Disease associations (from GenCC):

• autosomal recessive nonsyndromic hearing loss 7

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

  Inheritance: SD, AD Classification: DEFINITIVE, STRONG Submitted by: Ambry Genetics, ClinGen
• autosomal dominant nonsyndromic hearing loss 36

  Inheritance: AD, AR Classification: STRONG, MODERATE Submitted by: Ambry Genetics, Labcorp Genetics (formerly Invitae), PanelApp Australia
• autosomal dominant nonsyndromic hearing loss

  Inheritance: AD Classification: SUPPORTIVE Submitted by: Orphanet
• hearing loss, autosomal recessive

  Inheritance: AR Classification: SUPPORTIVE Submitted by: Orphanet

ACMG classification

Our verdict: Benign. The variant received -14 ACMG points.

• BP4: Computational evidence support a benign effect (BayesDel_noAF=-0.87).
• BP6: Variant 9-72694227-G-A is Benign according to our data. Variant chr9-72694227-G-A is described in ClinVar as [Benign]. Clinvar id is 1276260.Status of the report is criteria_provided_single_submitter, 1 stars.
• BA1: GnomAd4 highest subpopulation (AFR) allele frequency at 95% confidence interval = 0.719 is higher than 0.05.

Transcripts

RefSeq

Gene	Transcript	HGVSc	HGVSp	Effect	Exon rank	MANE	Protein	UniProt
TMC1	NM_138691.3	c.65-316G>A		intron_variant	Intron 6 of 23	ENST00000297784.10	NP_619636.2
TMC1	XM_017014256.2	c.68-316G>A		intron_variant	Intron 3 of 20		XP_016869745.1

Ensembl

Gene	Transcript	HGVSc	HGVSp	Effect	Exon rank	TSL	MANE	Protein	Appris	UniProt
TMC1	ENST00000297784.10	c.65-316G>A		intron_variant	Intron 6 of 23	1	NM_138691.3	ENSP00000297784.6

Frequencies

GnomAD3 genomes AF: 0.512 AC: 77814 AN: 151850 Hom.: 21260 Cov.: 32

Gnomad AFR AF: 0.726

Gnomad AMI AF: 0.448

Gnomad AMR AF: 0.463

Gnomad ASJ AF: 0.470

Gnomad EAS AF: 0.432

Gnomad SAS AF: 0.443

Gnomad FIN AF: 0.423

Gnomad MID AF: 0.522

Gnomad NFE AF: 0.422

Gnomad OTH AF: 0.512

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

GnomAD4 genome AF: 0.513 AC: 77893 AN: 151970 Hom.: 21287 Cov.: 32 AF XY: 0.510 AC XY: 37878 AN XY: 74252

African (AFR) AF: 0.726 AC: 30097 AN: 41476

American (AMR) AF: 0.462 AC: 7049 AN: 15248

Ashkenazi Jewish (ASJ) AF: 0.470 AC: 1630 AN: 3468

East Asian (EAS) AF: 0.432 AC: 2222 AN: 5144

South Asian (SAS) AF: 0.443 AC: 2141 AN: 4828

European-Finnish (FIN) AF: 0.423 AC: 4464 AN: 10548

Middle Eastern (MID) AF: 0.517 AC: 151 AN: 292

European-Non Finnish (NFE) AF: 0.422 AC: 28656 AN: 67962

Other (OTH) AF: 0.513 AC: 1076 AN: 2096

Alfa AF: 0.307 Hom.: 694

Bravo AF: 0.525

Asia WGS AF: 0.459 AC: 1590 AN: 3470

ClinVar

Significance: Benign

Submissions summary: Benign:1

Revision: criteria provided, single submitter

Submissions by phenotype

not provided Benign:1

Nov 12, 2018

GeneDx

Significance: Benign

Review Status: criteria provided, single submitter

Collection Method: clinical testing

- -

Computational scores

Source: dbNSFP v4.3

Name	Calibrated prediction	Score	Prediction
BayesDel_noAF	Benign	-0.87
CADD	Benign	0.018
DANN	Benign	0.55
PhyloP100		-2.2
Mutation Taster		=100/0	polymorphism (auto)

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: rs1663742; hg19: chr9-75309143;