rs151076155

Variant summary

Our verdict is Benign. Variant got -9 ACMG points: 0P and 9B. BP4_StrongBP6BS1

The NM_152468.5(TMC8):c.1364G>A(p.Arg455Gln) variant causes a missense change involving the alteration of a non-conserved nucleotide. The variant allele was found at a frequency of 0.00228 in 1,613,946 control chromosomes in the GnomAD database, including 5 homozygotes. In-silico tool predicts a benign outcome for this variant. 14/21 in silico tools predict a benign outcome for this variant. Variant has been reported in ClinVar as Conflicting classifications of pathogenicity (no stars). Another variant affecting the same amino acid position, but resulting in a different missense (i.e. R455W) has been classified as Uncertain significance.

Frequency

Genomes: 𝑓 0.0015 ( 0 hom., cov: 33)

Exomes 𝑓: 0.0024 ( 5 hom. )

Consequence

TMC8
NM_152468.5 missense

Scores

Clinical Significance

Conflicting classifications of pathogenicity criteria provided, conflicting classifications U:2B:3

Conservation

PhyloP100: 1.38

Variant links:

Genes affected

TMC8 (HGNC:20474): (transmembrane channel like 8) 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 8 predicted transmembrane domains and 3 leucine zipper motifs. [provided by RefSeq, Jul 2008]

TMC8 links:

Genome browser will be placed here

ACMG classification

Classification made for transcript

Verdict is Benign. Variant got -9 ACMG points.

BP4

Computational evidence support a benign effect (MetaRNN=0.009988368).

BP6

Variant 17-78138019-G-A is Benign according to our data. Variant chr17-78138019-G-A is described in ClinVar as [Conflicting_classifications_of_pathogenicity]. Clinvar id is 526232.We mark this variant Likely_benign, oryginal submissions are: {Likely_benign=1, Uncertain_significance=2}. Variant chr17-78138019-G-A is described in Lovd as [Likely_benign].

BS1

Variant frequency is greater than expected in population nfe. gnomad4 allele frequency = 0.00152 (232/152284) while in subpopulation NFE AF= 0.00272 (185/68018). AF 95% confidence interval is 0.0024. There are 0 homozygotes in gnomad4. There are 107 alleles in male gnomad4 subpopulation. This position pass quality control queck.

Transcripts

RefSeq

Gene	Transcript	HGVSc	HGVSp	Effect	#exon/exons	MANE	UniProt
TMC8	NM_152468.5 linkuse as main transcript	c.1364G>A	p.Arg455Gln	missense_variant	12/16	ENST00000318430.10

Ensembl

Gene	Transcript	HGVSc	HGVSp	Effect	#exon/exons	TSL	MANE	Appris	UniProt
TMC8	ENST00000318430.10 linkuse as main transcript	c.1364G>A	p.Arg455Gln	missense_variant	12/16	1	NM_152468.5	P2	Q8IU68-1

Frequencies

GnomAD3 genomes

AF:

0.00152

AC:

232

AN:

152166

Hom.:

Cov.:

show subpopulations

Gnomad AFR

AF:

0.000579

Gnomad AMI

AF:

0.00

Gnomad AMR

AF:

0.000589

Gnomad ASJ

AF:

0.00115

Gnomad EAS

AF:

0.00

Gnomad SAS

AF:

0.00

Gnomad FIN

AF:

0.000565

Gnomad MID

AF:

0.00

Gnomad NFE

AF:

0.00272

Gnomad OTH

AF:

0.00191

GnomAD3 exomes

AF:

0.00126

AC:

315

AN:

250530

Hom.:

AF XY:

0.00133

AC XY:

180

AN XY:

135714

show subpopulations

Gnomad AFR exome

AF:

0.000433

Gnomad AMR exome

AF:

0.000376

Gnomad ASJ exome

AF:

0.00249

Gnomad EAS exome

AF:

0.000163

Gnomad SAS exome

AF:

0.00

Gnomad FIN exome

AF:

0.000417

Gnomad NFE exome

AF:

0.00223

Gnomad OTH exome

AF:

0.000980

GnomAD4 exome

AF:

0.00236

AC:

3446

AN:

1461662

Hom.:

Cov.:

AF XY:

0.00227

AC XY:

1648

AN XY:

727128

show subpopulations

Gnomad4 AFR exome

AF:

0.000448

Gnomad4 AMR exome

AF:

0.000537

Gnomad4 ASJ exome

AF:

0.00184

Gnomad4 EAS exome

AF:

0.0000504

Gnomad4 SAS exome

AF:

0.0000232

Gnomad4 FIN exome

AF:

0.000676

Gnomad4 NFE exome

AF:

0.00288

Gnomad4 OTH exome

AF:

0.00185

GnomAD4 genome

AF:

0.00152

AC:

232

AN:

152284

Hom.:

Cov.:

AF XY:

0.00144

AC XY:

107

AN XY:

74444

show subpopulations

Gnomad4 AFR

AF:

0.000578

Gnomad4 AMR

AF:

0.000588

Gnomad4 ASJ

AF:

0.00115

Gnomad4 EAS

AF:

0.00

Gnomad4 SAS

AF:

0.00

Gnomad4 FIN

AF:

0.000565

Gnomad4 NFE

AF:

0.00272

Gnomad4 OTH

AF:

0.00189

Alfa

AF:

0.00202

Hom.:

Bravo

AF:

0.00142

TwinsUK

AF:

0.00216

AC:

ALSPAC

AF:

0.00337

AC:

ESP6500AA

AF:

0.000454

AC:

ESP6500EA

AF:

0.00267

AC:

ExAC

AF:

0.00119

AC:

145

EpiCase

AF:

0.00202

EpiControl

AF:

0.00243

ClinVar

Significance: Conflicting classifications of pathogenicity

Submissions summary: Uncertain:2Benign:3

Revision: criteria provided, conflicting classifications

LINK: link

Submissions by phenotype

not provided

Benign:2

Likely benign, no assertion criteria provided	clinical testing	Clinical Genetics DNA and cytogenetics Diagnostics Lab, Erasmus MC, Erasmus Medical Center	-	- -
Likely benign, no assertion criteria provided	clinical testing	Genome Diagnostics Laboratory, University Medical Center Utrecht	-	- -

Epidermodysplasia verruciformis, susceptibility to, 2

Uncertain:1

Uncertain significance, criteria provided, single submitter

clinical testing

Center for Genomics, Ann and Robert H. Lurie Children's Hospital of Chicago

Mar 30, 2021

TMC8 NM_152468.4 exon 12 p.Arg455Gln (c.1364G>A): This variant has not been reported in the literature but is present in 0.2% (25/10312) of Ashkenazi Jewish alleles in the Genome Aggregation Database (https://gnomad.broadinstitute.org/variant/17-76134100-G-A?dataset=gnomad_r2_1). This variant is present in ClinVar (Variation ID: 526232). This variant amino acid glutamine (Gln) is present in 2 species (Rhesus and Macaque) is not well conserved among evolutionarily distant species; this suggests that this variant may not impact the protein. Additional computational prediction tools do not suggest an impact. In summary, data on this variant is insufficient for disease classification. Therefore, the clinical significance of this variant is uncertain. -

Epidermodysplasia verruciformis, susceptibility to, 1

Uncertain:1

Uncertain significance, criteria provided, single submitter

clinical testing

Center for Genomics, Ann and Robert H. Lurie Children's Hospital of Chicago

Feb 12, 2020

Epidermodysplasia verruciformis

Benign:1

Likely benign, criteria provided, single submitter

clinical testing

Invitae

Jan 19, 2024

- -

Computational scores

Source: dbNSFP v4.3

Name

Calibrated prediction

Score

Prediction

AlphaMissense

Benign

0.079

BayesDel_addAF

Benign

-0.47

BayesDel_noAF

Benign

-0.46

Cadd

Benign

Dann

Uncertain

0.97

DEOGEN2

Benign

0.0077

T;.

Eigen

Benign

-0.68

Eigen_PC

Benign

-0.64

FATHMM_MKL

Benign

0.11

LIST_S2

Benign

0.75

T;T

M_CAP

Benign

0.023

MetaRNN

Benign

0.010

T;T

MetaSVM

Benign

-0.94

MutationAssessor

Uncertain

2.0

M;.

MutationTaster

Benign

1.0

N;N

PrimateAI

Benign

0.47

PROVEAN

Benign

-0.83

N;.

REVEL

Benign

0.060

Sift

Benign

0.28

T;.

Sift4G

Benign

0.31

T;T

Polyphen

0.039

B;.

Vest4

0.14

MVP

0.55

MPC

0.23

ClinPred

0.0049

GERP RS

2.4

RBP_binding_hub_radar

0.0

RBP_regulation_power_radar

1.0

Varity_R

0.039

gMVP

0.16

Splicing

Name

Calibrated prediction

Score

Prediction

SpliceAI score (max)

0.010

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