1-1535618-A-C

Position:

• chr1-1535618-A-C

Variant summary

Our verdict is Uncertain significance. Variant got 2 ACMG points: 2P and 0B. PM2

The NM_001114748.2(TMEM240):​c.344T>G​(p.Val115Gly) variant causes a missense change. The variant allele was found at a frequency of 0.00000258 in 1,549,552 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. V115M) has been classified as Likely benign.

• Frequency:
  • Genomes: 𝑓 0.000020 (0 hom., cov: 32)
  • Exomes 𝑓: 7.2e-7 (0 hom.)
• Consequence: TMEM240 NM_001114748.2 missense
• Clinical Significance: Not reported in ClinVar
• Conservation: PhyloP100: 5.56

Genes affected

TMEM240 (HGNC:25186): (transmembrane protein 240) This gene encodes a transmembrane-domain containing protein found in the brain and cerebellum. Mutations in this gene result in spinocerebellar ataxia 21. [provided by RefSeq, Dec 2014]

ACMG classification

Verdict is Uncertain_significance. Variant got 2 ACMG points.

• PM2: Very rare variant in population databases, with high coverage

Transcripts

RefSeq

Gene	Transcript	HGVSc	HGVSp	Effect	#exon/exons	MANE	Protein	UniProt
TMEM240	NM_001114748.2	c.344T>G	p.Val115Gly	missense_variant	3/4	ENST00000378733.9	NP_001108220.1

Ensembl

Gene	Transcript	HGVSc	HGVSp	Effect	#exon/exons	TSL	MANE	Protein	Appris	UniProt
TMEM240	ENST00000378733.9	c.344T>G	p.Val115Gly	missense_variant	3/4	2	NM_001114748.2	ENSP00000368007.4

Frequencies

GnomAD3 genomes AF: 0.0000197 AC: 3 AN: 152112 Hom.: 0 Cov.: 32

Gnomad AFR AF: 0.0000724

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: 0.00

Gnomad OTH AF: 0.00

GnomAD3 exomes AF: 0.00000656 AC: 1 AN: 152346 Hom.: 0 AF XY: 0.00 AC XY: 0 AN XY: 81396

Gnomad AFR exome AF: 0.000129

Gnomad AMR exome AF: 0.00

Gnomad ASJ exome AF: 0.00

Gnomad EAS exome AF: 0.00

Gnomad SAS exome AF: 0.00

Gnomad FIN exome AF: 0.00

Gnomad NFE exome AF: 0.00

Gnomad OTH exome AF: 0.00

GnomAD4 exome AF: 7.16e-7 AC: 1 AN: 1397440 Hom.: 0 Cov.: 33 AF XY: 0.00 AC XY: 0 AN XY: 689292

Gnomad4 AFR exome AF: 0.0000317

Gnomad4 AMR exome AF: 0.00

Gnomad4 ASJ exome AF: 0.00

Gnomad4 EAS exome AF: 0.00

Gnomad4 SAS exome AF: 0.00

Gnomad4 FIN exome AF: 0.00

Gnomad4 NFE exome AF: 0.00

Gnomad4 OTH exome AF: 0.00

GnomAD4 genome AF: 0.0000197 AC: 3 AN: 152112 Hom.: 0 Cov.: 32 AF XY: 0.0000269 AC XY: 2 AN XY: 74288

Gnomad4 AFR AF: 0.0000724

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: 0.00

Gnomad4 OTH AF: 0.00

Alfa AF: 0.0000333 Hom.: 0

Bravo AF: 0.0000302

ClinVar

Not reported in ClinVar

Computational scores

Source: dbNSFP v4.3

Name	Calibrated prediction	Score	Prediction
AlphaMissense	Benign	0.28
BayesDel_addAF	Uncertain	0.14	D
BayesDel_noAF	Pathogenic	0.20
CADD	Uncertain	25
DANN	Uncertain	1.0
DEOGEN2	Uncertain	0.65	D;D
Eigen	Benign	-0.24
Eigen_PC	Benign	-0.14
FATHMM_MKL	Uncertain	0.90	D
LIST_S2	Benign	0.71	.;T
M_CAP	Pathogenic	0.41	D
MetaRNN	Uncertain	0.43	T;T
MetaSVM	Benign	-1.0	T
MutationAssessor	Benign	0.69	N;N
PrimateAI	Uncertain	0.75	T
PROVEAN	Pathogenic	-6.1	D;D
REVEL	Uncertain	0.40
Sift	Uncertain	0.0010	D;D
Sift4G	Uncertain	0.0030	D;D
Polyphen		0.21	B;B
Vest4		0.57
MVP		0.41
ClinPred		0.95	D
GERP RS		2.2
Varity_R		0.66
gMVP		0.83

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

Other links and lift over

dbSNP: rs948435492; hg19: chr1-1470998;