NM_001114748.2:c.442T>C

Variant names:

• chr1-1535439-A-G
• NM_001114748.2:c.442T>C

Variant summary

Our verdict is Uncertain significance. Variant got 0 ACMG points: 2P and 2B. PM2 BP4_Moderate

The NM_001114748.2(TMEM240):​c.442T>C​(p.Phe148Leu) variant causes a missense change involving the alteration of a non-conserved nucleotide. The variant was absent in control chromosomes in GnomAD project. In-silico tool predicts a benign outcome for this variant. 12/19 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. F148S) has been classified as Uncertain significance.

• Frequency: Genomes: not found (cov: 32)
• Consequence: TMEM240 NM_001114748.2 missense
• Clinical Significance: Uncertain significance criteria provided, single submitter U:1
• Conservation: PhyloP100: 1.55

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 0 ACMG points.

• PM2: Very rare variant in population databases, with high coverage
• BP4: Computational evidence support a benign effect (MetaRNN=0.10440156).

Transcripts

RefSeq

Gene	Transcript	HGVSc	HGVSp	Effect	Exon rank	MANE	Protein	UniProt
TMEM240	NM_001114748.2	c.442T>C	p.Phe148Leu	missense_variant	Exon 4 of 4	ENST00000378733.9	NP_001108220.1

Ensembl

Gene	Transcript	HGVSc	HGVSp	Effect	Exon rank	TSL	MANE	Protein	Appris	UniProt
TMEM240	ENST00000378733.9	c.442T>C	p.Phe148Leu	missense_variant	Exon 4 of 4	2	NM_001114748.2	ENSP00000368007.4

Frequencies

GnomAD3 genomes Cov.: 32

GnomAD4 exome Cov.: 33

GnomAD4 genome Cov.: 32

ClinVar

Significance: Uncertain significance

Submissions summary: Uncertain:1

Revision: criteria provided, single submitter

Submissions by phenotype

not provided Uncertain:1

May 14, 2020

AiLife Diagnostics, AiLife Diagnostics

Significance: Uncertain significance

Review Status: criteria provided, single submitter

Collection Method: clinical testing

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Computational scores

Source: dbNSFP v4.3

Name	Calibrated prediction	Score	Prediction
AlphaMissense	Pathogenic	0.58
BayesDel_addAF	Benign	-0.24	T
BayesDel_noAF	Benign	-0.58
CADD	Benign	19
DANN	Benign	0.51
DEOGEN2	Benign	0.37	T;T
Eigen	Benign	-0.63
Eigen_PC	Benign	-0.48
FATHMM_MKL	Benign	0.70	D
LIST_S2	Benign	0.67	.;T
M_CAP	Pathogenic	0.63	D
MetaRNN	Benign	0.10	T;T
MetaSVM	Benign	-1.0	T
MutationAssessor	Benign	-0.34	N;N
PrimateAI	Pathogenic	0.90	D
PROVEAN	Benign	-2.0	N;N
REVEL	Benign	0.063
Sift	Benign	0.53	T;T
Sift4G	Benign	0.74	T;T
Polyphen		0.0	B;B
Vest4		0.057
MutPred		0.24		Gain of disorder (P = 0.0878);Gain of disorder (P = 0.0878);
MVP		0.055
ClinPred		0.043	T
GERP RS		2.6
Varity_R		0.14
gMVP		0.33

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

No publications associated with this variant yet.

Other links and lift over

hg19: chr1-1470819;