ENST00000330775.9:c.59G>A

Variant names:

Variant summary

Our verdict is Pathogenic. Variant got 14 ACMG points: 14P and 0B. PM1PM2PP3_ModeratePP5_Very_Strong

The ENST00000330775.9(SLC37A4):c.59G>A(p.Gly20Asp) variant causes a missense change. The variant allele was found at a frequency of 0.0000186 in 1,613,696 control chromosomes in the GnomAD database, with no homozygous occurrence. In-silico tool predicts a pathogenic outcome for this variant. Variant has been reported in ClinVar as Likely pathogenic (★★). Another variant affecting the same amino acid position, but resulting in a different missense (i.e. G20A) has been classified as Uncertain significance.

Frequency

Genomes: 𝑓 0.000020 ( 0 hom., cov: 33)

Exomes 𝑓: 0.000018 ( 0 hom. )

Consequence

SLC37A4
ENST00000330775.9 missense

Scores

Clinical Significance

Pathogenic/Likely pathogenic criteria provided, multiple submitters, no conflicts P:8O:1

Conservation

PhyloP100: 7.12

Variant links:

Genes affected

SLC37A4 (HGNC:4061): (solute carrier family 37 member 4) This gene regulates glucose-6-phosphate transport from the cytoplasm to the lumen of the endoplasmic reticulum, in order to maintain glucose homeostasis. It also plays a role in ATP-mediated calcium sequestration in the lumen of the endoplasmic reticulum. Mutations in this gene have been associated with various forms of glycogen storage disease. Alternative splicing in this gene results in multiple transcript variants.[provided by RefSeq, Aug 2009]

SLC37A4 links:

Genome browser will be placed here

ACMG classification

Classification made for transcript

Verdict is Pathogenic. Variant got 14 ACMG points.

PM1

In a hotspot region, there are 3 aminoacids with missense pathogenic changes in the window of +-8 aminoacids around while only 1 benign, 12 uncertain in ENST00000330775.9

PM2

Very rare variant in population databases, with high coverage;

PP3

MetaRNN computational evidence supports a deleterious effect, 0.867

PP5

Variant 11-119029311-C-T is Pathogenic according to our data. Variant chr11-119029311-C-T is described in ClinVar as [Likely_pathogenic]. Clinvar id is 68286.Status of the report is criteria_provided_multiple_submitters_no_conflicts, 2 stars. Variant chr11-119029311-C-T is described in Lovd as [Pathogenic].

Transcripts

RefSeq

Gene	Transcript	HGVSc	HGVSp	Effect	Exon rank	Protein	UniProt
SLC37A4	NM_001164278.2 link	c.59G>A	p.Gly20Asp	missense_variant	Exon 3 of 12	NP_001157750.1	O43826-2A0A024R3L1
SLC37A4	NM_001164277.2 link	c.59G>A	p.Gly20Asp	missense_variant	Exon 3 of 11	NP_001157749.1	O43826-1A0A024R3H9A8K0S7
SLC37A4	NM_001164280.2 link	c.59G>A	p.Gly20Asp	missense_variant	Exon 1 of 9	NP_001157752.1	O43826-1A0A024R3H9

Ensembl

Gene	Transcript	HGVSc	HGVSp	Effect	Exon rank	TSL	MANE	Protein	Appris	UniProt
SLC37A4	ENST00000330775.9 link	c.59G>A	p.Gly20Asp	missense_variant	Exon 2 of 10	5		ENSP00000476242.2		U3KPU7

Frequencies

GnomAD3 genomes

AF:

0.0000197

AC:

AN:

152242

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:

0.0000441

Gnomad OTH

AF:

0.00

GnomAD3 exomes

AF:

0.0000161

AC:

AN:

248896

Hom.:

AF XY:

0.0000222

AC XY:

AN XY:

135064

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 SAS exome

AF:

0.0000327

Gnomad FIN exome

AF:

0.00

Gnomad NFE exome

AF:

0.0000266

Gnomad OTH exome

AF:

0.00

GnomAD4 exome

AF:

0.0000185

AC:

AN:

1461454

Hom.:

Cov.:

AF XY:

0.0000220

AC XY:

AN XY:

727014

show subpopulations

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:

0.0000232

Gnomad4 FIN exome

AF:

0.00

Gnomad4 NFE exome

AF:

0.0000207

Gnomad4 OTH exome

AF:

0.0000331

GnomAD4 genome

AF:

0.0000197

AC:

AN:

152242

Hom.:

Cov.:

AF XY:

0.0000269

AC XY:

AN XY:

74384

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:

0.0000441

Gnomad4 OTH

AF:

0.00

Bravo

AF:

0.0000151

EpiCase

AF:

0.00

EpiControl

AF:

0.0000593

ClinVar

Significance: Pathogenic/Likely pathogenic

Submissions summary: Pathogenic:8Other:1

Revision: criteria provided, multiple submitters, no conflicts

LINK: link

Submissions by phenotype

Glucose-6-phosphate transport defect

Pathogenic:4

Apr 04, 2024

Labcorp Genetics (formerly Invitae), Labcorp

Significance: Pathogenic

Review Status: criteria provided, single submitter

Collection Method: clinical testing

This sequence change replaces glycine, which is neutral and non-polar, with aspartic acid, which is acidic and polar, at codon 20 of the SLC37A4 protein (p.Gly20Asp). This variant is present in population databases (rs193302881, gnomAD 0.003%). This missense change has been observed in individual(s) with glycogen-storage disease type Ib (GSD Ib) (PMID: 9758626, 10518030, 12373566; Invitae). In at least one individual the data is consistent with being in trans (on the opposite chromosome) from a pathogenic variant. ClinVar contains an entry for this variant (Variation ID: 68286). Advanced modeling of protein sequence and biophysical properties (such as structural, functional, and spatial information, amino acid conservation, physicochemical variation, residue mobility, and thermodynamic stability) performed at Invitae indicates that this missense variant is expected to disrupt SLC37A4 protein function with a positive predictive value of 80%. Experimental studies have shown that this missense change affects SLC37A4 function (PMID: 12444104). For these reasons, this variant has been classified as Pathogenic. -

Mar 14, 2024

Baylor Genetics

Significance: Pathogenic

Review Status: criteria provided, single submitter

Collection Method: clinical testing

- -

Aug 27, 2018

Women's Health and Genetics/Laboratory Corporation of America, LabCorp

Significance: Pathogenic

Review Status: criteria provided, single submitter

Collection Method: clinical testing

Variant summary: SLC37A4 c.59G>A (p.Gly20Asp) results in a non-conservative amino acid change located in the Major facilitator superfamily domain (IPR020846) of the encoded protein sequence. Two of two in-silico tools predict a damaging effect of the variant on protein function. The variant allele was found at a frequency of 1.4e-05 in 276916 control chromosomes (gnomAD). c.59G>A has been reported in the literature in multiple individuals affected with Glycogen Storage Disease Type Ib and Type Ic (Veiga-da-Cunha 1998, Galli 1999, Jun 2014). These data indicate that the variant is very likely to be associated with disease. At least one publication reports experimental evidence evaluating an impact on protein function (Chen 2002). The most pronounced variant effect results in <10% of normal microsomal G6P uptake activity. No clinical diagnostic laboratories have submitted clinical-significance assessments for this variant to ClinVar after 2014. Based on the evidence outlined above, the variant was classified as pathogenic. -

May 20, 2023

Neuberg Centre For Genomic Medicine, NCGM

Significance: Pathogenic

Review Status: criteria provided, single submitter

Collection Method: clinical testing

The observed missense variant c.59G>A (p.Gly20Asp) in SLC37A4 gene has been reported previously in multiple individuals affected with Glycogen storage disease Ib (Jun et al. 2014; Wortmann et al. 2020). Experimental evidence shows that this variant destabilizes the glucose-6-phosphate transporter (G6PT) activity to <10% of normal microsomal G6P uptake activity (Chen et al. 2002). The p.Gly20Asp variant is present with an allele frequency of 0.002% on gnomAD exomes database. This variant has been submitted to the ClinVar database as Likely Pathogenic / Pathogenic (multiple submissions). Computational evidence (SIFT - damaging) predict a damaging effect on protein structure and function for this variant. The reference amino acid at this position on SLC37A4 gene is predicted as conserved by GERP++ and PhyloP across 100 vertebrates. The amino acid Gly at position 20 is changed to a Asp changing protein sequence and it might alter its composition and physico-chemical properties. For these reasons, this variant has been classified as Pathogenic. -

not provided

Pathogenic:3Other:1

May 28, 2019

Mendelics

Significance: Likely pathogenic

Review Status: criteria provided, single submitter

Collection Method: clinical testing

- -

Nov 01, 2024

CeGaT Center for Human Genetics Tuebingen

Significance: Likely pathogenic

Review Status: criteria provided, single submitter

Collection Method: clinical testing

SLC37A4: PM3:Strong, PM2, PS3:Supporting -

UniProtKB/Swiss-Prot

Significance: not provided

Review Status: no classification provided

Collection Method: literature only

- -

Nov 01, 2023

Mayo Clinic Laboratories, Mayo Clinic

Significance: Pathogenic

Review Status: criteria provided, single submitter

Collection Method: clinical testing

PP3, PM2, PM3, PS3, PS4_moderate -

Glucose-6-phosphate transport defect;C0342749:Phosphate transport defect;C5561986:Congenital disorder of glycosylation, type IIw

Pathogenic:1

May 12, 2022

Fulgent Genetics, Fulgent Genetics

Significance: Pathogenic

Review Status: criteria provided, single submitter

Collection Method: clinical testing

- -

Computational scores

Source: dbNSFP v4.3

Name

Calibrated prediction

Score

Prediction

AlphaMissense

Pathogenic

0.99

BayesDel_addAF

Pathogenic

0.51

BayesDel_noAF

Pathogenic

0.60

CADD

Pathogenic

DANN

Benign

0.92

DEOGEN2

Uncertain

0.55

D;D;D

FATHMM_MKL

Uncertain

0.97

LIST_S2

Uncertain

0.97

.;D;D

M_CAP

Benign

0.050

MetaRNN

Pathogenic

0.87

D;D;D

Sift4G

Pathogenic

0.0

D;D;D

Vest4

0.97

MVP

0.42

MPC

0.23

GERP RS

5.0

gMVP

0.99

Splicing

Name

Calibrated prediction

Score

Prediction

SpliceAI score (max)

0.090

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