Genetic Variant TMC6:p.Ala793Ala (chr17-78113187-C-G) – ACMG Classification: Likely_benign (-3 pts)

Variant summary

Our verdict is Likely benign. The variant received -3 ACMG points: 2P and 5B. PM2BP4_StrongBP7

The NM_001127198.5(TMC6):c.2379G>C(p.Ala793Ala) variant causes a synonymous change involving the alteration of a non-conserved nucleotide. The variant allele was found at a frequency of 0.00000854 in 1,405,756 control chromosomes in the GnomAD database, with no homozygous occurrence. In-silico tool predicts a benign outcome for this variant. No clinical diagnostic laboratories have submitted clinical-significance assessments for this variant to ClinVar. Synonymous variant affecting the same amino acid position (i.e. A793A) has been classified as Likely benign.

Frequency

Genomes: not found (cov: 33)

Exomes 𝑓: 0.0000085 ( 0 hom. )

Consequence

TMC6
NM_001127198.5 synonymous

Scores

Clinical Significance

Not reported in ClinVar

Conservation

PhyloP100: -1.23

Publications

0 publications found

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 Gene-Disease associations (from GenCC):

epidermodysplasia verruciformis, susceptibility to, 1
Inheritance: AR Classification: DEFINITIVE, STRONG Submitted by: Labcorp Genetics (formerly Invitae), G2P, Ambry Genetics
epidermodysplasia verruciformis
Inheritance: AR Classification: STRONG, SUPPORTIVE Submitted by: Genomics England PanelApp, Orphanet

TMC6 links:

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ACMG classification

Classification was made for transcript

Our verdict: Likely_benign. The variant received -3 ACMG points.

PM2

Very rare variant in population databases, with high coverage;

BP4

Computational evidence support a benign effect (BayesDel_noAF=-0.85).

BP7

Synonymous conserved (PhyloP=-1.23 with no splicing effect.

Transcripts

RefSeq

Gene	Transcript	HGVSc	HGVSp	Effect	Exon rank	MANE	Protein	UniProt
TMC6	NM_001127198.5 link	c.2379G>C	p.Ala793Ala	synonymous_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.2379G>C	p.Ala793Ala	synonymous_variant	Exon 20 of 20	2	NM_001127198.5	ENSP00000465261.1		Q7Z403-1

Frequencies

GnomAD3 genomes

Cov.:

GnomAD2 exomes

AF:

0.0000119

AC:

AN:

167920

AF XY:

0.0000112

show subpopulations

Gnomad AFR exome

AF:

0.00

Gnomad AMR exome

AF:

0.00

Gnomad ASJ exome

AF:

0.00

Gnomad EAS 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:

0.00000854

AC:

AN:

1405756

Hom.:

Cov.:

AF XY:

0.0000115

AC XY:

AN XY:

693856

show subpopulations

African (AFR)

AF:

0.00

AC:

AN:

32456

American (AMR)

AF:

0.00

AC:

AN:

36634

Ashkenazi Jewish (ASJ)

AF:

0.00

AC:

AN:

25104

East Asian (EAS)

AF:

0.00

AC:

AN:

37168

South Asian (SAS)

AF:

0.000150

AC:

AN:

79758

European-Finnish (FIN)

AF:

0.00

AC:

AN:

48904

Middle Eastern (MID)

AF:

0.00

AC:

AN:

5680

European-Non Finnish (NFE)

AF:

0.00

AC:

AN:

1081878

Other (OTH)

AF:

0.00

AC:

AN:

58174

Allele Balance Distribution

Red line indicates average allele balance

Average allele balance: 0.488

Heterozygous variant carriers

0.00

0.20

0.40

0.60

0.80

0.95

Allele balance

GnomAD4 genome

Cov.:

Alfa

AF:

0.00

Hom.:

ClinVar

Not reported in ClinVar

Computational scores

Source: dbNSFP v4.3

Name

Calibrated prediction

Score

Prediction

BayesDel_noAF

Benign

-0.85

CADD

Benign

0.73

(source)

DANN

Benign

0.37

PhyloP100

-1.2

Splicing

Name

Calibrated prediction

Score

Prediction

SpliceAI score (max)

0.030

Details are displayed if max score is > 0.2

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

Publications

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17-78113187-C-G

Variant summary

Frequency

Consequence

Scores

Clinical Significance

Conservation

Publications

ACMG classification

Transcripts

RefSeq

Ensembl

Frequencies

Age Distribution

ClinVar

Computational scores

Splicing

Publications

Other links and lift over