Genetic Variant TMEM63B:p.Ser17Asn (chr6-44134634-G-A) – 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_018426.3(TMEM63B):c.50G>A(p.Ser17Asn) variant causes a missense change involving the alteration of a non-conserved nucleotide. The variant allele was found at a frequency of 0.00000657 in 152,266 control chromosomes in the GnomAD database, with no homozygous occurrence. In-silico tool predicts a benign outcome for this variant. 13/21 in silico tools predict a benign outcome for this variant. Variant has been reported in ClinVar as Uncertain significance (★).

Frequency

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

Consequence

TMEM63B
NM_018426.3 missense

Scores

Clinical Significance

Uncertain significance criteria provided, single submitter U:1

Conservation

PhyloP100: 0.828

Variant links:

Genes affected

TMEM63B (HGNC:17735): (transmembrane protein 63B) Predicted to enable calcium activated cation channel activity; mechanosensitive ion channel activity; and osmolarity-sensing cation channel activity. Predicted to be involved in cation transmembrane transport. Located in actin cytoskeleton and plasma membrane. [provided by Alliance of Genome Resources, Apr 2022]

TMEM63B 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=0.04944539).

Transcripts

RefSeq

Gene	Transcript	HGVSc	HGVSp	Effect	Exon rank	MANE	Protein	UniProt
TMEM63B	NM_018426.3 link	c.50G>A	p.Ser17Asn	missense_variant	Exon 2 of 24	ENST00000323267.11	NP_060896.1	Q5T3F8-1

Ensembl

Gene	Transcript	HGVSc	HGVSp	Effect	Exon rank	TSL	MANE	Protein	Appris	UniProt
TMEM63B	ENST00000323267.11 link	c.50G>A	p.Ser17Asn	missense_variant	Exon 2 of 24	5	NM_018426.3	ENSP00000327154.6		Q5T3F8-1

Frequencies

GnomAD3 genomes

AF:

0.00000657

AC:

AN:

152266

Hom.:

Cov.:

show subpopulations

Gnomad AFR

AF:

0.00

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:

0.0000147

Gnomad OTH

AF:

0.00

GnomAD4 exome

Cov.:

GnomAD4 genome

AF:

0.00000657

AC:

AN:

152266

Hom.:

Cov.:

AF XY:

0.00

AC XY:

AN XY:

74392

show subpopulations

Gnomad4 AFR

AF:

0.00

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:

0.0000147

Gnomad4 OTH

AF:

0.00

Bravo

AF:

0.00000378

ClinVar

Significance: Uncertain significance

Submissions summary: Uncertain:1

Revision: criteria provided, single submitter

LINK: link

Submissions by phenotype

Inborn genetic diseases

Uncertain:1

Jan 08, 2025

Ambry Genetics

Significance: Uncertain significance

Review Status: criteria provided, single submitter

Collection Method: clinical testing

The c.50G>A (p.S17N) alteration is located in exon 2 (coding exon 1) of the TMEM63B gene. This alteration results from a G to A substitution at nucleotide position 50, causing the serine (S) at amino acid position 17 to be replaced by an asparagine (N). 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

0.065

BayesDel_addAF

Benign

-0.33

BayesDel_noAF

Benign

-0.71

CADD

Benign

DANN

Uncertain

0.98

DEOGEN2

Benign

0.013

T;.;T

Eigen

Benign

-0.63

Eigen_PC

Benign

-0.47

FATHMM_MKL

Benign

0.16

LIST_S2

Benign

0.68

.;T;T

M_CAP

Benign

0.0060

MetaRNN

Benign

0.049

T;T;T

MetaSVM

Benign

-0.97

MutationAssessor

Benign

-0.86

N;.;N

PrimateAI

Uncertain

0.57

PROVEAN

Benign

-0.34

N;N;N

REVEL

Benign

0.085

Sift

Benign

0.29

T;T;T

Sift4G

Benign

0.26

T;T;T

Polyphen

0.0

B;.;B

Vest4

0.089

MutPred

0.23

Loss of glycosylation at S17 (P = 0.0572);Loss of glycosylation at S17 (P = 0.0572);Loss of glycosylation at S17 (P = 0.0572);

MVP

0.068

MPC

1.0

ClinPred

0.078

GERP RS

3.2

Varity_R

0.069

gMVP

0.49

Splicing

Name

Calibrated prediction

Score

Prediction

SpliceAI score (max)

0.0

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