Genetic Variant TMC6:p.Thr654Lys (chr17-78117862-G-T) – ACMG Classification: Uncertain_significance (2 pts)

Variant summary

Our verdict is Uncertain significance. The variant received 2 ACMG points: 2P and 0B. PM2

The NM_001127198.5(TMC6):c.1961C>A(p.Thr654Lys) variant causes a missense change. The variant allele was found at a frequency of 0.00000206 in 1,455,692 control chromosomes in the GnomAD database, with no homozygous occurrence. No clinical diagnostic laboratories have submitted clinical-significance assessments for this variant to ClinVar. Another variant affecting the same amino acid position, but resulting in a different missense (i.e. T654M) has been classified as Uncertain significance.

Frequency

Genomes: not found (cov: 33)

Exomes 𝑓: 0.0000021 ( 0 hom. )

Consequence

TMC6
NM_001127198.5 missense

Scores

Clinical Significance

Not reported in ClinVar

Conservation

PhyloP100: 6.06

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: Uncertain_significance. The variant received 2 ACMG points.

PM2

Very rare variant in population databases, with high coverage;

Transcripts

RefSeq

Gene	Transcript	HGVSc	HGVSp	Effect	Exon rank	MANE	Protein	UniProt
TMC6	NM_001127198.5 link	c.1961C>A	p.Thr654Lys	missense_variant	Exon 16 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.1961C>A	p.Thr654Lys	missense_variant	Exon 16 of 20	2	NM_001127198.5	ENSP00000465261.1		Q7Z403-1

Frequencies

GnomAD3 genomes

Cov.:

GnomAD4 exome

AF:

0.00000206

AC:

AN:

1455692

Hom.:

Cov.:

AF XY:

0.00000138

AC XY:

AN XY:

723662

show subpopulations

African (AFR)

AF:

0.00

AC:

AN:

33436

American (AMR)

AF:

0.00

AC:

AN:

43932

Ashkenazi Jewish (ASJ)

AF:

0.00

AC:

AN:

25940

East Asian (EAS)

AF:

0.00

AC:

AN:

39538

South Asian (SAS)

AF:

0.00

AC:

AN:

85356

European-Finnish (FIN)

AF:

0.00

AC:

AN:

52052

Middle Eastern (MID)

AF:

0.00

AC:

AN:

5750

European-Non Finnish (NFE)

AF:

0.00000270

AC:

AN:

1109540

Other (OTH)

AF:

0.00

AC:

AN:

60148

Allele Balance Distribution

Red line indicates average allele balance

Average allele balance: 0.492

Heterozygous variant carriers

0.00

0.20

0.40

0.60

0.80

0.95

Allele balance

Age Distribution

Exome Het

Variant carriers

<30

30-35

35-40

40-45

45-50

50-55

55-60

60-65

65-70

70-75

75-80

>80

Age

GnomAD4 genome

Cov.:

ClinVar

Not reported in ClinVar

Computational scores

Source: dbNSFP v4.3

Name

Calibrated prediction

Score

Prediction

AlphaMissense

Pathogenic

0.75

BayesDel_addAF

Uncertain

0.057

BayesDel_noAF

Benign

-0.16

CADD

Pathogenic

(source)

DANN

Uncertain

0.98

DEOGEN2

Benign

0.15

T;T;T;.

Eigen

Benign

0.032

Eigen_PC

Benign

0.11

FATHMM_MKL

Uncertain

0.95

LIST_S2

Uncertain

0.86

.;.;D;T

M_CAP

Benign

0.054

MetaRNN

Uncertain

0.58

D;D;D;D

MetaSVM

Benign

-0.68

MutationAssessor

Uncertain

2.5

M;M;M;.

PhyloP100

6.1

PrimateAI

Uncertain

0.49

PROVEAN

Uncertain

-3.9

.;D;D;.

REVEL

Uncertain

0.32

Sift

Benign

0.13

.;T;T;.

Sift4G

Benign

0.13

T;T;T;T

Polyphen

0.41

B;B;B;B

Vest4

0.66

MutPred

0.67

Gain of ubiquitination at T654 (P = 0.0258);Gain of ubiquitination at T654 (P = 0.0258);Gain of ubiquitination at T654 (P = 0.0258);.;

MVP

0.73

MPC

0.57

ClinPred

0.97

GERP RS

3.9

Varity_R

0.34

gMVP

0.71

Mutation Taster

=67/33

polymorphism

(source)

Splicing

Name

Calibrated prediction

Score

Prediction

SpliceAI score (max)

0.28

Details are displayed if max score is > 0.2

DS_AG_spliceai

0.28

Position offset: -2

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

Publications

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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