Genetic Variant TMEM38A:p.Asn83Lys (chr19-16680108-C-G) – ACMG Classification: Uncertain_significance (2 pts)

Variant summary

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

The NM_024074.4(TMEM38A):c.249C>G(p.Asn83Lys) variant causes a missense change involving the alteration of a non-conserved nucleotide. The variant allele was found at a frequency of 0.0000379 in 1,610,212 control chromosomes in the GnomAD database, with no homozygous occurrence. Variant has been reported in ClinVar as Uncertain significance (★).

Frequency

Genomes: 𝑓 0.000013 ( 0 hom., cov: 32)

Exomes 𝑓: 0.000040 ( 0 hom. )

Consequence

TMEM38A
NM_024074.4 missense

Scores

Clinical Significance

Uncertain significance criteria provided, single submitter U:1

Conservation

PhyloP100: 0.949

Variant links:

Genes affected

TMEM38A (HGNC:28462): (transmembrane protein 38A) Predicted to enable potassium channel activity. Predicted to act upstream of or within several processes, including cellular response to caffeine; inorganic cation transmembrane transport; and regulation of cardiac muscle contraction by regulation of the release of sequestered calcium ion. Located in extracellular exosome. [provided by Alliance of Genome Resources, Apr 2022]

TMEM38A links:

Genome browser will be placed here

ACMG classification

Classification made for transcript

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 rank	MANE	Protein	UniProt
TMEM38A	NM_024074.4 link	c.249C>G	p.Asn83Lys	missense_variant	Exon 2 of 6	ENST00000187762.7	NP_076979.1	Q9H6F2

Ensembl

Gene	Transcript	HGVSc	HGVSp	Effect	Exon rank	TSL	MANE	Protein	UniProt
TMEM38A	ENST00000187762.7 link	c.249C>G	p.Asn83Lys	missense_variant	Exon 2 of 6	1	NM_024074.4	ENSP00000187762.1	Q9H6F2
TMEM38A	ENST00000599479.1 link	c.204C>G	p.Asn68Lys	missense_variant	Exon 2 of 4	3		ENSP00000469721.1	M0QYB6
TMEM38A	ENST00000595452.1 link	n.225C>G		non_coding_transcript_exon_variant	Exon 2 of 3	2

Frequencies

GnomAD3 genomes

AF:

0.0000131

AC:

AN:

152250

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:

0.0000294

Gnomad OTH

AF:

0.00

GnomAD3 exomes

AF:

0.0000161

AC:

AN:

248146

Hom.:

AF XY:

0.0000223

AC XY:

AN XY:

134418

show subpopulations

Gnomad AFR exome

AF:

0.0000617

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:

0.0000265

Gnomad OTH exome

AF:

0.00

GnomAD4 exome

AF:

0.0000405

AC:

AN:

1457962

Hom.:

Cov.:

AF XY:

0.0000386

AC XY:

AN XY:

725486

show subpopulations

Gnomad4 AFR exome

AF:

0.0000299

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:

0.0000486

Gnomad4 OTH exome

AF:

0.0000663

GnomAD4 genome

AF:

0.0000131

AC:

AN:

152250

Hom.:

Cov.:

AF XY:

0.0000134

AC XY:

AN XY:

74380

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:

0.0000294

Gnomad4 OTH

AF:

0.00

Alfa

AF:

0.0000930

Hom.:

Bravo

AF:

0.0000189

ExAC

AF:

0.00000824

AC:

ClinVar

Significance: Uncertain significance

Submissions summary: Uncertain:1

Revision: criteria provided, single submitter

LINK: link

Submissions by phenotype

not specified

Uncertain:1

Feb 24, 2022

Ambry Genetics

Significance: Uncertain significance

Review Status: criteria provided, single submitter

Collection Method: clinical testing

The c.249C>G (p.N83K) alteration is located in exon 2 (coding exon 2) of the TMEM38A gene. This alteration results from a C to G substitution at nucleotide position 249, causing the asparagine (N) at amino acid position 83 to be replaced by a lysine (K). 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

Uncertain

0.51

BayesDel_addAF

Benign

-0.19

BayesDel_noAF

Benign

-0.33

CADD

Benign

DANN

Uncertain

1.0

DEOGEN2

Benign

0.25

Eigen

Uncertain

0.43

Eigen_PC

Uncertain

0.45

FATHMM_MKL

Uncertain

0.87

LIST_S2

Uncertain

0.91

M_CAP

Benign

0.0043

MetaRNN

Uncertain

0.46

MetaSVM

Benign

-0.76

MutationAssessor

Benign

2.0

PrimateAI

Uncertain

0.55

PROVEAN

Uncertain

-3.6

REVEL

Benign

0.16

Sift

Benign

0.10

Sift4G

Benign

0.17

Polyphen

0.90

Vest4

0.54

MutPred

0.66

Gain of ubiquitination at N83 (P = 0.0162);

MVP

0.081

MPC

0.97

ClinPred

0.76

GERP RS

4.5

RBP_binding_hub_radar

0.0

RBP_regulation_power_radar

1.7

Varity_R

0.33

gMVP

0.86

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