17-78113187-C-T

Variant names:

• chr17-78113187-C-T
• rs1252137655
• NM_001127198.5:c.2379G>A

Variant summary

Our verdict is Likely benign. The variant received -5 ACMG points: 2P and 7B. PM2 BP4_Strong BP6_Moderate BP7

The NM_001127198.5(TMC6):​c.2379G>A​(p.Ala793Ala) variant causes a synonymous change involving the alteration of a non-conserved nucleotide. The variant allele was found at a frequency of 0.0000064 in 1,405,756 control chromosomes in the GnomAD database, with no homozygous occurrence. In-silico tool predicts a benign outcome for this variant. Variant has been reported in ClinVar as Likely benign (★).

• Frequency:
  • Genomes: not found (cov: 33)
  • Exomes 𝑓: 0.0000064 (0 hom.)
• Consequence: TMC6 NM_001127198.5 synonymous
• Clinical Significance: Likely benign criteria provided, single submitter B:1
• Conservation: PhyloP100: -1.23
• Publications: 0 publications found

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: Ambry Genetics, PanelApp Australia, G2P, Labcorp Genetics (formerly Invitae)
• epidermodysplasia verruciformis

  Inheritance: AR Classification: STRONG, SUPPORTIVE Submitted by: Genomics England PanelApp, Orphanet

ACMG classification

Our verdict: Likely_benign. The variant received -5 ACMG points.

• PM2: Very rare variant in population databases, with high coverage
• BP4: Computational evidence support a benign effect (BayesDel_noAF=-0.77).
• BP6: Variant 17-78113187-C-T is Benign according to our data. Variant chr17-78113187-C-T is described in ClinVar as Likely_benign. ClinVar VariationId is 3696548.Status of the report is criteria_provided_single_submitter, 1 stars.
• BP7: Synonymous conserved (PhyloP=-1.23 with no splicing effect.

Variant Effect in Transcripts

ACMG analysis was done for transcript: NM_001127198.5. You can select a different transcript below to see updated ACMG assignments.

RefSeq Transcripts

Sel.	Gene	Transcript	Tags	HGVSc	HGVSp	Effect	Exon Rank	Protein	UniProt
	TMC6	NM_001127198.5	MANE Select	c.2379G>A	p.Ala793Ala	synonymous	Exon 20 of 20	NP_001120670.1	Q7Z403-1
	TMC6	NM_001321185.1		c.2379G>A	p.Ala793Ala	synonymous	Exon 20 of 20	NP_001308114.1	Q7Z403-1
	TMC6	NM_001374596.1		c.2379G>A	p.Ala793Ala	synonymous	Exon 20 of 20	NP_001361525.1	Q7Z403-1

Ensembl Transcripts

Sel.	Gene	Transcript	Tags	HGVSc	HGVSp	Effect	Exon Rank	Protein	UniProt
	TMC6	ENST00000590602.6	TSL:2 MANE Select	c.2379G>A	p.Ala793Ala	synonymous	Exon 20 of 20	ENSP00000465261.1	Q7Z403-1
	TMC6	ENST00000322914.7	TSL:1	c.2379G>A	p.Ala793Ala	synonymous	Exon 20 of 20	ENSP00000313408.2	Q7Z403-1
	TMC6	ENST00000392467.7	TSL:1	c.2379G>A	p.Ala793Ala	synonymous	Exon 19 of 19	ENSP00000376260.2	Q7Z403-1

Frequencies

GnomAD3 genomes Cov.: 33

GnomAD2 exomes AF: 0.0000119 AC: 2 AN: 167920 AF XY: 0.0000224

Gnomad AFR exome AF: 0.0000963

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: 0.0000150

Gnomad OTH exome AF: 0.00

GnomAD4 exome AF: 0.00000640 AC: 9 AN: 1405756 Hom.: 0 Cov.: 31 AF XY: 0.00000865 AC XY: 6 AN XY: 693856

African (AFR) AF: 0.0000308 AC: 1 AN: 32456

American (AMR) AF: 0.0000273 AC: 1 AN: 36634

Ashkenazi Jewish (ASJ) AF: 0.00 AC: 0 AN: 25104

East Asian (EAS) AF: 0.00 AC: 0 AN: 37168

South Asian (SAS) AF: 0.00 AC: 0 AN: 79758

European-Finnish (FIN) AF: 0.00 AC: 0 AN: 48904

Middle Eastern (MID) AF: 0.00 AC: 0 AN: 5680

European-Non Finnish (NFE) AF: 0.00000555 AC: 6 AN: 1081878

Other (OTH) AF: 0.0000172 AC: 1 AN: 58174

GnomAD4 genome Cov.: 33

Alfa AF: 0.0000450 Hom.: 0

Bravo AF: 0.00000756

ClinVar

ClinVar submissions

Significance: Likely benign

Revision: criteria provided, single submitter

Pathogenic	VUS	Benign	Condition
-	-	1	Epidermodysplasia verruciformis (1)

Computational scores

Source: dbNSFP v4.9

Name	Calibrated prediction	Score	Prediction
BayesDel_noAF	Benign	-0.77
CADD	Benign	5.8
DANN	Benign	0.56
PhyloP100		-1.2
RBP_binding_hub_radar		1.0
RBP_regulation_power_radar		2.1
Mutation Taster		=100/0	polymorphism

Splicing

Name	Calibrated prediction	Score	Prediction
SpliceAI score (max)		0.080		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: rs1252137655; hg19: chr17-76109268;