Genetic Variant NM_006931.3:c.1459G>C (chr12-7921445-C-G) – ACMG Classification: Likely_benign (-2 pts)

Variant summary

Our verdict is Likely benign. The variant received -2 ACMG points: 2P and 4B. PM2BP4_Strong

The NM_006931.3(SLC2A3):c.1459G>C(p.Glu487Gln) variant causes a missense change involving the alteration of a non-conserved nucleotide. The variant allele was found at a frequency of 0.00000137 in 1,461,712 control chromosomes in the GnomAD database, with no homozygous occurrence. In-silico tool predicts a benign outcome for this variant. 17/22 in silico tools predict a benign 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. E487K) has been classified as Uncertain significance.

Frequency

Genomes: not found (cov: 34)

Exomes 𝑓: 0.0000014 ( 0 hom. )

Consequence

SLC2A3
NM_006931.3 missense

Scores

Clinical Significance

Not reported in ClinVar

Conservation

PhyloP100: 0.464

Publications

5 publications found

Variant links:

Genes affected

SLC2A3 (HGNC:11007): (solute carrier family 2 member 3) Enables dehydroascorbic acid transmembrane transporter activity; glucose binding activity; and glucose transmembrane transporter activity. Involved in glucose import across plasma membrane and transport across blood-brain barrier. Is integral component of plasma membrane. Biomarker of Alzheimer's disease; acanthosis nigricans; diabetes mellitus; and type 2 diabetes mellitus. [provided by Alliance of Genome Resources, Apr 2022]

SLC2A3 Gene-Disease associations (from GenCC):

Huntington disease
Inheritance: AD Classification: SUPPORTIVE Submitted by: Orphanet

SLC2A3 links:

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ACMG classification

Classification was made for transcript

Our verdict: Likely_benign. The variant received -2 ACMG points.

PM2

Very rare variant in population databases, with high coverage;

BP4

Computational evidence support a benign effect (MetaRNN=0.034848362).

Variant Effect in Transcripts

ACMG analysis was done for transcript: NM_006931.3. You can select a different transcript below to see updated ACMG assignments.

RefSeq Transcripts

Sel.	Gene	Transcript	Tags	HGVSc	HGVSp	Effect	Exon Rank	Protein	UniProt
	SLC2A3	NM_006931.3	MANE Select	c.1459G>C	p.Glu487Gln	missense	Exon 10 of 10	NP_008862.1	P11169

Ensembl Transcripts

Gene	Transcript	Tags	HGVSc	HGVSp	Effect	Exon Rank	Protein	UniProt
SLC2A3	ENST00000075120.12	TSL:1 MANE Select	c.1459G>C	p.Glu487Gln	missense	Exon 10 of 10	ENSP00000075120.7	P11169
SLC2A3	ENST00000486749.5	TSL:1	n.2200G>C		non_coding_transcript_exon	Exon 9 of 9
SLC2A3	ENST00000926562.1		c.1492G>C	p.Glu498Gln	missense	Exon 10 of 10	ENSP00000596621.1

Frequencies

GnomAD3 genomes

Cov.:

GnomAD2 exomes

AF:

0.00000398

AC:

AN:

251288

AF XY:

0.00

show subpopulations

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 FIN exome

AF:

0.00

Gnomad NFE exome

AF:

0.00000880

Gnomad OTH exome

AF:

0.00

GnomAD4 exome

AF:

0.00000137

AC:

AN:

1461712

Hom.:

Cov.:

AF XY:

0.00

AC XY:

AN XY:

727152

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:

33472

American (AMR)

AF:

0.00

AC:

AN:

44716

Ashkenazi Jewish (ASJ)

AF:

0.00

AC:

AN:

26132

East Asian (EAS)

AF:

0.00

AC:

AN:

39700

South Asian (SAS)

AF:

0.00

AC:

AN:

86250

European-Finnish (FIN)

AF:

0.00

AC:

AN:

53420

Middle Eastern (MID)

AF:

0.00

AC:

AN:

5762

European-Non Finnish (NFE)

AF:

8.99e-7

AC:

AN:

1111882

Other (OTH)

AF:

0.0000166

AC:

AN:

60378

⚠️ The allele balance in gnomAD4 Exomes is highly skewed from 0.5 (p-value = 0.0385499), which strongly suggests a high chance of mosaicism in these individuals.

Allele Balance Distribution

Red line indicates average allele balance

Average allele balance: 0.375

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 v4.9

Name

Calibrated prediction

Score

Prediction

AlphaMissense

Benign

0.064

BayesDel_addAF

Benign

-0.19

BayesDel_noAF

Benign

-0.51

CADD

Benign

3.3

(source)

DANN

Benign

0.58

DEOGEN2

Benign

0.074

Eigen

Benign

-1.8

Eigen_PC

Benign

-1.8

FATHMM_MKL

Benign

0.11

LIST_S2

Benign

0.51

M_CAP

Benign

0.014

MetaRNN

Benign

0.035

MetaSVM

Benign

-0.85

MutationAssessor

Benign

0.0

PhyloP100

0.46

PrimateAI

Benign

0.26

PROVEAN

Benign

-0.23

REVEL

Benign

0.23

Sift

Benign

1.0

Sift4G

Benign

0.88

Polyphen

0.0

Vest4

0.022

MutPred

0.30

Gain of catalytic residue at P488 (P = 0.0031)

MVP

0.26

MPC

0.78

ClinPred

0.010

GERP RS

-1.7

Varity_R

0.026

gMVP

0.40

Mutation Taster

=99/1

polymorphism

(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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Variant summary

Frequency

Consequence

Scores

Clinical Significance

Conservation

Publications

ACMG classification

Variant Effect in Transcripts

RefSeq Transcripts

Ensembl Transcripts

Frequencies

ClinVar

Computational scores

Splicing

Publications

Other links and lift over