rs1057517008

Variant summary

Our verdict is Likely pathogenic. Variant got 9 ACMG points: 10P and 1B. PM2PP5_Very_StrongBP4

The NM_000151.4(G6PC1):c.161A>C(p.Gln54Pro) variant causes a missense change involving the alteration of a non-conserved nucleotide. The variant allele was found at a frequency of 0.00000186 in 1,614,050 control chromosomes in the GnomAD database, with no homozygous occurrence. In-silico tool predicts a benign outcome for this variant. 12/21 in silico tools predict a benign outcome for this variant. Variant has been reported in ClinVar as Likely pathogenic (★★).

Frequency

Genomes: 𝑓 0.0000066 ( 0 hom., cov: 32)

Exomes 𝑓: 0.0000014 ( 0 hom. )

Consequence

G6PC1
NM_000151.4 missense

Scores

Clinical Significance

Pathogenic/Likely pathogenic criteria provided, multiple submitters, no conflicts P:4

Conservation

PhyloP100: 0.767

Variant links:

Genes affected

G6PC1 (HGNC:4056): (glucose-6-phosphatase catalytic subunit 1) Glucose-6-phosphatase (G6Pase) is a multi-subunit integral membrane protein of the endoplasmic reticulum that is composed of a catalytic subunit and transporters for G6P, inorganic phosphate, and glucose. This gene (G6PC) is one of the three glucose-6-phosphatase catalytic-subunit-encoding genes in human: G6PC, G6PC2 and G6PC3. Glucose-6-phosphatase catalyzes the hydrolysis of D-glucose 6-phosphate to D-glucose and orthophosphate and is a key enzyme in glucose homeostasis, functioning in gluconeogenesis and glycogenolysis. Mutations in this gene cause glycogen storage disease type I (GSD1). This disease, also known as von Gierke disease, is a metabolic disorder characterized by severe hypoglycemia associated with the accumulation of glycogen and fat in the liver and kidneys.[provided by RefSeq, Feb 2011]

G6PC1 links:

Genome browser will be placed here

ACMG classification

Classification made for transcript

Verdict is Likely_pathogenic. Variant got 9 ACMG points.

PM2

Very rare variant in population databases, with high coverage;

PP5

Variant 17-42901037-A-C is Pathogenic according to our data. Variant chr17-42901037-A-C is described in ClinVar as [Likely_pathogenic]. Clinvar id is 371101.Status of the report is criteria_provided_multiple_submitters_no_conflicts, 2 stars.

BP4

Computational evidence support a benign effect (MetaRNN=0.40613902).. Strength limited to SUPPORTING due to the PP5.

Transcripts

RefSeq

Gene	Transcript	HGVSc	HGVSp	Effect	#exon/exons	MANE	UniProt
G6PC1	NM_000151.4 linkuse as main transcript	c.161A>C	p.Gln54Pro	missense_variant	1/5	ENST00000253801.7
G6PC1	NM_001270397.2 linkuse as main transcript	c.161A>C	p.Gln54Pro	missense_variant	1/5

Ensembl

Gene	Transcript	HGVSc	HGVSp	Effect	#exon/exons	TSL	MANE	Appris	UniProt
G6PC1	ENST00000253801.7 linkuse as main transcript	c.161A>C	p.Gln54Pro	missense_variant	1/5	1	NM_000151.4	P1	P35575-1
G6PC1	ENST00000592383.5 linkuse as main transcript	c.161A>C	p.Gln54Pro	missense_variant	1/5	2			P35575-2
G6PC1	ENST00000585489.1 linkuse as main transcript	c.161A>C	p.Gln54Pro	missense_variant	1/4	5
G6PC1	ENST00000588481.1 linkuse as main transcript	n.226A>C		non_coding_transcript_exon_variant	1/2	2

Frequencies

GnomAD3 genomes

AF:

0.00000657

AC:

AN:

152164

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:

0.0000147

Gnomad OTH

AF:

0.00

GnomAD4 exome

AF:

0.00000137

AC:

AN:

1461886

Hom.:

Cov.:

AF XY:

0.00

AC XY:

AN XY:

727246

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:

0.00

Gnomad4 FIN exome

AF:

0.00

Gnomad4 NFE exome

AF:

0.00000180

Gnomad4 OTH exome

AF:

0.00

GnomAD4 genome

AF:

0.00000657

AC:

AN:

152164

Hom.:

Cov.:

AF XY:

0.0000135

AC XY:

AN XY:

74330

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:

0.0000147

Gnomad4 OTH

AF:

0.00

Bravo

AF:

0.00000378

ClinVar

Significance: Pathogenic/Likely pathogenic

Submissions summary: Pathogenic:4

Revision: criteria provided, multiple submitters, no conflicts

LINK: link

Submissions by phenotype

Glycogen storage disease due to glucose-6-phosphatase deficiency type IA

Pathogenic:4

Pathogenic, no assertion criteria provided	clinical testing	Natera, Inc.	Mar 17, 2017	- -
Likely pathogenic, criteria provided, single submitter	clinical testing	Counsyl	Jun 27, 2016	- -
Pathogenic, criteria provided, single submitter	clinical testing	Invitae	Nov 11, 2023	This sequence change replaces glutamine, which is neutral and polar, with proline, which is neutral and non-polar, at codon 54 of the G6PC protein (p.Gln54Pro). This variant is not present in population databases (gnomAD no frequency). This missense change has been observed in individuals with glycogen storage disease type 1a (PMID: 10447271, 15542400). It has also been observed to segregate with disease in related individuals. ClinVar contains an entry for this variant (Variation ID: 371101). 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 G6PC protein function with a positive predictive value of 80%. Experimental studies have shown that this missense change affects G6PC function (PMID: 11739393). For these reasons, this variant has been classified as Pathogenic. -
Pathogenic, criteria provided, single submitter	clinical testing	Women's Health and Genetics/Laboratory Corporation of America, LabCorp	Jun 07, 2019	Variant summary: G6PC c.161A>C (p.Gln54Pro) results in a non-conservative amino acid change in the encoded protein sequence. Four of five in-silico tools predict a benign effect of the variant on protein function. The variant was absent in 251444 control chromosomes (gnomAD). The variant, c.161A>C, has been reported in the literature in multiple individuals affected with Glycogen Storage Disease Type Ia (Trioche_1999, Angaroni_2004). These data indicate that the variant is very likely to be associated with disease. One publication, Shieh_2002, reports G6Pase activity of this residual variant remained <10% of normal activity. One ClinVar submissions from other clinical diagnostic laboratories (evaluation after 2014) cites the variant as likely pathogenic. Based on the evidence outlined above, the variant was classified as pathogenic. -

Computational scores

Source: dbNSFP v4.3

Name

Calibrated prediction

Score

Prediction

AlphaMissense

Uncertain

0.37

BayesDel_addAF

Pathogenic

0.18

BayesDel_noAF

Uncertain

0.030

Cadd

Benign

Dann

Benign

0.92

Eigen

Benign

-0.71

Eigen_PC

Benign

-0.72

FATHMM_MKL

Benign

0.30

LIST_S2

Uncertain

0.86

D;D;D

M_CAP

Benign

0.062

MetaRNN

Benign

0.41

T;T;T

MetaSVM

Benign

-0.85

MutationAssessor

Benign

1.2

L;L;.

MutationTaster

Benign

1.0

N;N;N

PrimateAI

Benign

0.23

Sift4G

Benign

0.14

T;T;T

Polyphen

0.031

.;B;.

Vest4

0.59

MutPred

0.66

Gain of helix (P = 0.132);Gain of helix (P = 0.132);Gain of helix (P = 0.132);

MVP

0.71

MPC

0.27

ClinPred

0.17

GERP RS

-0.74

Varity_R

0.74

gMVP

0.91

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