20-2816588-A-G

Position:

• chr20-2816588-A-G

Variant summary

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

The NM_001167670.3(TMEM239):​c.34A>G​(p.Ile12Val) variant causes a missense change involving the alteration of a non-conserved nucleotide. The variant allele was found at a frequency of 0.00000217 in 1,384,878 control chromosomes in the GnomAD database, with no homozygous occurrence. In-silico tool predicts a benign outcome for this variant. 11/15 in silico tools predict a benign outcome for this variant. Variant has been reported in ClinVar as Uncertain significance (★).

• Frequency:
  • Genomes: not found (cov: 32)
  • Exomes 𝑓: 0.0000022 (0 hom.)
• Consequence: TMEM239 NM_001167670.3 missense
• Clinical Significance: Uncertain significance criteria provided, single submitter U:1
• Conservation: PhyloP100: 1.56

Genes affected

TMEM239 (HGNC:40044): (transmembrane protein 239) Predicted to be integral component of membrane. [provided by Alliance of Genome Resources, Apr 2022]

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=0.07811287).

Transcripts

RefSeq

Gene	Transcript	HGVSc	HGVSp	Effect	#exon/exons	MANE	Protein	UniProt
TMEM239	NM_001167670.3	c.34A>G	p.Ile12Val	missense_variant	2/2	ENST00000380585.2	NP_001161142.1

Ensembl

Gene	Transcript	HGVSc	HGVSp	Effect	#exon/exons	TSL	MANE	Protein	Appris	UniProt
TMEM239	ENST00000380585.2	c.34A>G	p.Ile12Val	missense_variant	2/2	1	NM_001167670.3	ENSP00000369959	P1
TMEM239	ENST00000361033.1	c.163A>G	p.Ile55Val	missense_variant	2/2	2		ENSP00000354312

Frequencies

GnomAD3 genomes Cov.: 32

GnomAD3 exomes AF: 0.00000714 AC: 1 AN: 140040 Hom.: 0 AF XY: 0.0000132 AC XY: 1 AN XY: 75532

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: 0.00

Gnomad FIN exome AF: 0.00

Gnomad NFE exome AF: 0.0000179

Gnomad OTH exome AF: 0.00

GnomAD4 exome AF: 0.00000217 AC: 3 AN: 1384878 Hom.: 0 Cov.: 37 AF XY: 0.00000293 AC XY: 2 AN XY: 683380

Gnomad4 AFR exome AF: 0.00

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: 0.00000278

Gnomad4 OTH exome AF: 0.00

GnomAD4 genome Cov.: 32

ClinVar

Significance: Uncertain significance

Submissions summary: Uncertain:1

Revision: criteria provided, single submitter

Submissions by phenotype

not specified Uncertain:1

Uncertain significance, criteria provided, single submitter

clinical testing

Ambry Genetics

Jan 09, 2023

The c.34A>G (p.I12V) alteration is located in exon 2 (coding exon 1) of the TMEM239 gene. This alteration results from a A to G substitution at nucleotide position 34, causing the isoleucine (I) at amino acid position 12 to be replaced by a valine (V). 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	0.10
BayesDel_addAF	Uncertain	0.072	D
BayesDel_noAF	Benign	-0.47
CADD	Benign	16
DANN	Uncertain	1.0
Eigen	Benign	-0.31
Eigen_PC	Benign	-0.17
FATHMM_MKL	Benign	0.22	N
LIST_S2	Benign	0.23	T
M_CAP	Benign	0.0061	T
MetaRNN	Benign	0.078	T
MetaSVM	Benign	-1.1	T
MutationTaster	Benign	1.0	N;N;N
PROVEAN	Benign	-0.13	N
REVEL	Benign	0.20
Sift	Pathogenic	0.0	D
Sift4G	Benign	0.74	T
Vest4		0.23
MutPred		0.19		Gain of MoRF binding (P = 0.0177);
MVP		0.030
ClinPred		0.085	T
GERP RS		3.5

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

Other links and lift over

dbSNP: rs966535233; hg19: chr20-2797234;