chr1-225847207-C-T

Position:

chr1-225847207-C-T

Variant summary

Our verdict is Benign. Variant got -8 ACMG points: 0P and 8B. BP4_StrongBS2

The NM_014698.3(TMEM63A):c.2257G>A(p.Val753Met) variant causes a missense change involving the alteration of a non-conserved nucleotide. The variant allele was found at a frequency of 0.0000434 in 1,612,890 control chromosomes in the GnomAD database, with no homozygous occurrence. In-silico tool predicts a benign outcome for this variant. 12/21 in silico tools predict a benign outcome for this variant. Variant has been reported in ClinVar as Uncertain significance (★). Another variant affecting the same amino acid position, but resulting in a different missense (i.e. V753L) has been classified as Uncertain significance.

Frequency

Genomes: 𝑓 0.000039 ( 0 hom., cov: 33)

Exomes 𝑓: 0.000044 ( 0 hom. )

Consequence

TMEM63A
NM_014698.3 missense

Scores

Clinical Significance

Uncertain significance criteria provided, single submitter U:1

Conservation

PhyloP100: 1.38

Variant links:

Genes affected

TMEM63A (HGNC:29118): (transmembrane protein 63A) Enables mechanosensitive ion channel activity. Predicted to be involved in cation transmembrane transport. Located in centriolar satellite and lysosomal membrane. Implicated in hypomyelinating leukodystrophy. [provided by Alliance of Genome Resources, Apr 2022]

TMEM63A links:

Genome browser will be placed here

ACMG classification

Classification made for transcript

Verdict is Benign. Variant got -8 ACMG points.

BP4

Computational evidence support a benign effect (MetaRNN=0.05269593).

BS2

High AC in GnomAd4 at 6 AD gene.

Transcripts

RefSeq

Gene	Transcript	HGVSc	HGVSp	Effect	#exon/exons	MANE	UniProt
TMEM63A	NM_014698.3 linkuse as main transcript	c.2257G>A	p.Val753Met	missense_variant	24/25	ENST00000366835.8

Ensembl

Gene	Transcript	HGVSc	HGVSp	Effect	#exon/exons	TSL	MANE	Appris
TMEM63A	ENST00000366835.8 linkuse as main transcript	c.2257G>A	p.Val753Met	missense_variant	24/25	1	NM_014698.3	P1
TMEM63A	ENST00000482753.1 linkuse as main transcript	n.337G>A		non_coding_transcript_exon_variant	4/4	3
TMEM63A	ENST00000496025.1 linkuse as main transcript	n.259G>A		non_coding_transcript_exon_variant	1/2	2

Frequencies

GnomAD3 genomes

AF:

0.0000394

AC:

AN:

152234

Hom.:

Cov.:

show subpopulations

Gnomad AFR

AF:

0.00

Gnomad AMI

AF:

0.00

Gnomad AMR

AF:

0.0000654

Gnomad ASJ

AF:

0.00

Gnomad EAS

AF:

0.00

Gnomad SAS

AF:

0.000414

Gnomad FIN

AF:

0.00

Gnomad MID

AF:

0.00

Gnomad NFE

AF:

0.0000441

Gnomad OTH

AF:

0.00

GnomAD3 exomes

AF:

0.0000921

AC:

AN:

249690

Hom.:

AF XY:

0.000111

AC XY:

AN XY:

135274

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 SAS exome

AF:

0.000556

Gnomad FIN exome

AF:

0.00

Gnomad NFE exome

AF:

0.0000534

Gnomad OTH exome

AF:

0.00

GnomAD4 exome

AF:

0.0000438

AC:

AN:

1460538

Hom.:

Cov.:

AF XY:

0.0000606

AC XY:

AN XY:

726486

show subpopulations

Gnomad4 AFR exome

AF:

0.00

Gnomad4 AMR exome

AF:

0.0000448

Gnomad4 ASJ exome

AF:

0.00

Gnomad4 EAS exome

AF:

0.00

Gnomad4 SAS exome

AF:

0.000533

Gnomad4 FIN exome

AF:

0.00

Gnomad4 NFE exome

AF:

0.00000810

Gnomad4 OTH exome

AF:

0.000116

GnomAD4 genome

AF:

0.0000394

AC:

AN:

152352

Hom.:

Cov.:

AF XY:

0.0000268

AC XY:

AN XY:

74504

show subpopulations

Gnomad4 AFR

AF:

0.00

Gnomad4 AMR

AF:

0.0000654

Gnomad4 ASJ

AF:

0.00

Gnomad4 EAS

AF:

0.00

Gnomad4 SAS

AF:

0.000414

Gnomad4 FIN

AF:

0.00

Gnomad4 NFE

AF:

0.0000441

Gnomad4 OTH

AF:

0.00

Alfa

AF:

0.0000966

Hom.:

Bravo

AF:

0.0000302

ExAC

AF:

0.000107

AC:

Asia WGS

AF:

0.000577

AC:

AN:

3478

ClinVar

Significance: Uncertain significance

Submissions summary: Uncertain:1

Revision: criteria provided, single submitter

LINK: link

Submissions by phenotype

Leukodystrophy, hypomyelinating, 19, transient infantile

Uncertain:1

Uncertain significance, criteria provided, single submitter

clinical testing

Neuberg Centre For Genomic Medicine, NCGM

The missense c.2257G>A p.Val753Met variant in TMEM63A gene has not been reported previously as a pathogenic variant nor as a benign variant, to our knowledge. The p.Val753Met variant is reported with an allele frequency of 0.009% [17/30594 in South Asian continental population] in the gnomAD exomes database. TMEM63A is associated disorder may resolve in individuals over time Yan et al. 2019, which could explain the high minor-allele frequency for this variant. This variant has not been reported to the ClinVar database. The amino acid change p.Val753Met in TMEM63A is predicted as conserved by GERP++ and PhyloP across 100 vertebrates. The amino acid Val at position 753 is changed to a Met changing protein sequence and it might alter its composition and physico-chemical properties. For these reasons, this variant has been classified as a Variant of Uncertain Significance VUS. -

Computational scores

Source: dbNSFP v4.3

Name

Calibrated prediction

Score

Prediction

AlphaMissense

Benign

0.16

BayesDel_addAF

Benign

-0.35

BayesDel_noAF

Benign

-0.39

CADD

Benign

DANN

Uncertain

0.99

DEOGEN2

Benign

0.0049

Eigen

Benign

-0.13

Eigen_PC

Benign

-0.017

FATHMM_MKL

Uncertain

0.82

LIST_S2

Benign

0.73

M_CAP

Benign

0.0080

MetaRNN

Benign

0.053

MetaSVM

Benign

-1.1

MutationAssessor

Uncertain

2.8

MutationTaster

Benign

1.0

PrimateAI

Uncertain

0.63

PROVEAN

Benign

-1.3

REVEL

Benign

0.061

Sift

Benign

0.037

Sift4G

Uncertain

0.022

Polyphen

0.39

Vest4

0.34

MVP

0.095

MPC

0.24

ClinPred

0.17

GERP RS

4.1

RBP_binding_hub_radar

0.0

RBP_regulation_power_radar

1.1

Varity_R

0.097

gMVP

0.44

Splicing

Name

Calibrated prediction

Score

Prediction

SpliceAI score (max)

0.020

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