Genetic Variant NM_052885.4:c.1636G>A (chr12-39764544-C-T) – ACMG Classification: Uncertain_significance (4 pts)

Variant summary

Our verdict is Uncertain significance. The variant received 4 ACMG points: 4P and 0B. PM2PP3_Moderate

The NM_052885.4(SLC2A13):c.1636G>A(p.Ala546Thr) variant causes a missense change involving the alteration of a conserved nucleotide. The variant allele was found at a frequency of 0.00000137 in 1,459,846 control chromosomes in the GnomAD database, with no homozygous occurrence. In-silico tool predicts a pathogenic outcome for this variant. 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. A546S) has been classified as Uncertain significance.

Frequency

Genomes: not found (cov: 32)

Exomes 𝑓: 0.0000014 ( 0 hom. )

Consequence

SLC2A13
NM_052885.4 missense

Scores

Clinical Significance

Not reported in ClinVar

Conservation

PhyloP100: 7.50

Publications

3 publications found

Variant links:

Genes affected

SLC2A13 (HGNC:15956): (solute carrier family 2 member 13) Enables ATPase binding activity; myo-inositol:proton symporter activity; and protease binding activity. Involved in myo-inositol transport and positive regulation of amyloid-beta formation. Is integral component of plasma membrane. Part of cell body; cell periphery; and cell projection. [provided by Alliance of Genome Resources, Apr 2022]

SLC2A13 links:

REDIC1 (HGNC:26846): (regulator of DNA class I crossover intermediates 1)

REDIC1 links:

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ACMG classification

Classification was made for transcript

Our verdict: Uncertain_significance. The variant received 4 ACMG points.

PM2

Very rare variant in population databases, with high coverage;

PP3

MetaRNN computational evidence supports a deleterious effect, 0.902

Transcripts

RefSeq

Gene	Transcript	HGVSc	HGVSp	Effect	Exon rank	MANE	Protein	UniProt
SLC2A13	NM_052885.4 link	c.1636G>A	p.Ala546Thr	missense_variant	Exon 9 of 10	ENST00000280871.9	NP_443117.3	Q96QE2

Ensembl

Gene	Transcript	HGVSc	HGVSp	Effect	Exon rank	TSL	MANE	Protein	Appris	UniProt
SLC2A13	ENST00000280871.9 link	c.1636G>A	p.Ala546Thr	missense_variant	Exon 9 of 10	1	NM_052885.4	ENSP00000280871.4		Q96QE2
REDIC1	ENST00000468200.2 link	n.*725-196C>T		intron_variant	Intron 15 of 18	1		ENSP00000473371.1		Q86WS4-3

Frequencies

GnomAD3 genomes

Cov.:

GnomAD4 exome

AF:

0.00000137

AC:

AN:

1459846

Hom.:

Cov.:

AF XY:

0.00000138

AC XY:

AN XY:

726118

show subpopulations

⚠️ The allele balance in gnomAD version 4 Exomes is significantly skewed from the expected value of 0.5.

African (AFR)

AF:

0.00

AC:

AN:

33348

American (AMR)

AF:

0.00

AC:

AN:

44416

Ashkenazi Jewish (ASJ)

AF:

0.00

AC:

AN:

26048

East Asian (EAS)

AF:

0.00

AC:

AN:

39636

South Asian (SAS)

AF:

0.00

AC:

AN:

85782

European-Finnish (FIN)

AF:

0.00

AC:

AN:

53376

Middle Eastern (MID)

AF:

0.00

AC:

AN:

5750

European-Non Finnish (NFE)

AF:

0.00000180

AC:

AN:

1111198

Other (OTH)

AF:

0.00

AC:

AN:

60292

⚠️ The allele balance in gnomAD4 Exomes is highly skewed from 0.5 (p-value = 0.002339), which strongly suggests a high chance of mosaicism in these individuals.

Allele Balance Distribution

Red line indicates average allele balance

Average allele balance: 0.350

Heterozygous variant carriers

0.00

0.20

0.40

0.60

0.80

0.95

Allele balance

GnomAD4 genome

Cov.:

ClinVar

Not reported in ClinVar

Computational scores

Source: dbNSFP v4.3

Name

Calibrated prediction

Score

Prediction

AlphaMissense

Pathogenic

0.90

BayesDel_addAF

Pathogenic

0.31

BayesDel_noAF

Pathogenic

0.21

CADD

Pathogenic

(source)

DANN

Pathogenic

1.0

DEOGEN2

Benign

0.28

Eigen

Pathogenic

0.74

Eigen_PC

Pathogenic

0.75

FATHMM_MKL

Uncertain

0.93

LIST_S2

Uncertain

0.95

M_CAP

Benign

0.071

MetaRNN

Pathogenic

0.90

MetaSVM

Benign

-0.37

MutationAssessor

Benign

1.8

PhyloP100

7.5

PrimateAI

Pathogenic

0.81

PROVEAN

Benign

-2.2

REVEL

Uncertain

0.54

Sift

Uncertain

0.0050

Sift4G

Uncertain

0.0070

Polyphen

0.97

Vest4

0.95

MutPred

0.75

Gain of helix (P = 0.1736);

MVP

0.68

MPC

0.80

ClinPred

0.93

GERP RS

5.6

Varity_R

0.34

gMVP

0.89

Mutation Taster

=35/65

disease causing

(source)

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

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NM_052885.4:c.1636G>A

Variant summary

Frequency

Consequence

Scores

Clinical Significance

Conservation

Publications

ACMG classification

Transcripts

RefSeq

Ensembl

Frequencies

Age Distribution

ClinVar

Computational scores

Splicing

Publications

Other links and lift over