Genetic Variant TMC6:p.Glu791Ala (chr17-78113194-T-G) – ACMG Classification: Likely_benign (-2 pts)

Variant summary

Our verdict is Likely benign. Variant got -2 ACMG points: 2P and 4B. PM2BP4_Strong

The NM_001127198.5(TMC6):c.2372A>C(p.Glu791Ala) variant causes a missense change involving the alteration of a non-conserved nucleotide. The variant allele was found at a frequency of 0.0000045 in 1,556,502 control chromosomes in the GnomAD database, with no homozygous occurrence. In-silico tool predicts a benign outcome for this variant. 16/21 in silico tools predict a benign outcome for this variant. No clinical diagnostic laboratories have submitted clinical-significance assessments for this variant to ClinVar.

Frequency

Genomes: 𝑓 0.0000066 ( 0 hom., cov: 33)

Exomes 𝑓: 0.0000043 ( 0 hom. )

Consequence

TMC6
NM_001127198.5 missense

Scores

Clinical Significance

Uncertain significance criteria provided, single submitter U:1

Conservation

PhyloP100: -0.199

Variant links:

Genes affected

TMC6 (HGNC:18021): (transmembrane channel like 6) Epidermodysplasia verruciformis (EV) is an autosomal recessive dermatosis characterized by abnormal susceptibility to human papillomaviruses (HPVs) and a high rate of progression to squamous cell carcinoma on sun-exposed skin. EV is caused by mutations in either of two adjacent genes located on chromosome 17q25.3. Both of these genes encode integral membrane proteins that localize to the endoplasmic reticulum and are predicted to form transmembrane channels. This gene encodes a transmembrane channel-like protein with 10 transmembrane domains and 2 leucine zipper motifs. [provided by RefSeq, Jul 2008]

TMC6 links:

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ACMG classification

Classification made for transcript

Verdict is Likely_benign. Variant got -2 ACMG points.

PM2

Very rare variant in population databases, with high coverage;

BP4

Computational evidence support a benign effect (MetaRNN=0.05473417).

Transcripts

RefSeq

Gene	Transcript	HGVSc	HGVSp	Effect	Exon rank	MANE	Protein	UniProt
TMC6	NM_001127198.5 link	c.2372A>C	p.Glu791Ala	missense_variant	Exon 20 of 20	ENST00000590602.6	NP_001120670.1	Q7Z403-1A0A024R8V2

Ensembl

Gene	Transcript	HGVSc	HGVSp	Effect	Exon rank	TSL	MANE	Protein	Appris	UniProt
TMC6	ENST00000590602.6 link	c.2372A>C	p.Glu791Ala	missense_variant	Exon 20 of 20	2	NM_001127198.5	ENSP00000465261.1		Q7Z403-1

Frequencies

GnomAD3 genomes

AF:

0.00000657

AC:

AN:

152158

Hom.:

Cov.:

show subpopulations

Gnomad AFR

AF:

0.0000241

Gnomad AMI

AF:

0.00

Gnomad AMR

AF:

0.00

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:

0.00

Gnomad OTH

AF:

0.00

GnomAD3 exomes

AF:

0.0000121

AC:

AN:

165158

Hom.:

AF XY:

0.00

AC XY:

AN XY:

87516

show subpopulations

Gnomad AFR exome

AF:

0.000198

Gnomad AMR exome

AF:

0.00

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:

0.00000427

AC:

AN:

1404344

Hom.:

Cov.:

AF XY:

0.00000289

AC XY:

AN XY:

693058

show subpopulations

Gnomad4 AFR exome

AF:

0.0000617

Gnomad4 AMR exome

AF:

0.00

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:

0.00000278

Gnomad4 OTH exome

AF:

0.0000172

GnomAD4 genome

AF:

0.00000657

AC:

AN:

152158

Hom.:

Cov.:

AF XY:

0.00

AC XY:

AN XY:

74324

show subpopulations

Gnomad4 AFR

AF:

0.0000241

Gnomad4 AMR

AF:

0.00

Gnomad4 ASJ

AF:

0.00

Gnomad4 EAS

AF:

0.00

Gnomad4 SAS

AF:

0.00

Gnomad4 FIN

AF:

0.00

Gnomad4 NFE

AF:

0.00

Gnomad4 OTH

AF:

0.00

Bravo

AF:

0.00000756

ClinVar

Significance: Uncertain significance

Submissions summary: Uncertain:1

Revision: criteria provided, single submitter

LINK: link

Submissions by phenotype

Inborn genetic diseases

Uncertain:1

Feb 06, 2025

Ambry Genetics

Significance: Uncertain significance

Review Status: criteria provided, single submitter

Collection Method: clinical testing

The c.2372A>C (p.E791A) alteration is located in exon 20 (coding exon 19) of the TMC6 gene. This alteration results from a A to C substitution at nucleotide position 2372, causing the glutamic acid (E) at amino acid position 791 to be replaced by an alanine (A). Based on insufficient or conflicting evidence, the clinical significance of this alteration remains unclear. -

Computational scores

Source: dbNSFP v4.3

Name

Calibrated prediction

Score

Prediction

AlphaMissense

Benign

0.063

BayesDel_addAF

Benign

-0.067

BayesDel_noAF

Benign

-0.33

CADD

Benign

6.5

DANN

Benign

0.92

DEOGEN2

Benign

0.027

T;T;T;.;.

Eigen

Benign

-0.94

Eigen_PC

Benign

-1.0

FATHMM_MKL

Benign

0.036

LIST_S2

Benign

0.62

.;.;T;T;T

M_CAP

Benign

0.050

MetaRNN

Benign

0.055

T;T;T;T;T

MetaSVM

Benign

-0.91

MutationAssessor

Benign

0.81

L;L;L;.;.

PrimateAI

Benign

0.40

PROVEAN

Benign

-1.2

.;N;N;N;.

REVEL

Benign

0.077

Sift

Benign

0.34

.;T;T;D;.

Sift4G

Benign

0.16

T;T;T;T;T

Polyphen

0.0

B;B;B;B;B

Vest4

0.16

MutPred

0.27

Loss of solvent accessibility (P = 0.0062);Loss of solvent accessibility (P = 0.0062);Loss of solvent accessibility (P = 0.0062);.;.;

MVP

0.42

MPC

0.17

ClinPred

0.031

GERP RS

0.49

RBP_binding_hub_radar

1.0

RBP_regulation_power_radar

2.7

Varity_R

0.10

gMVP

0.25

Splicing

Name

Calibrated prediction

Score

Prediction

SpliceAI score (max)

0.020

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

Below is the list of publications found by LitVar. It may be empty.

Variant summary

Frequency

Consequence

Scores

Clinical Significance

Conservation

ACMG classification

Transcripts

RefSeq

Ensembl

Frequencies

ClinVar

Submissions by phenotype

Computational scores

Splicing

Publications

LitVar

Other links and lift over