rs1555559733

Variant names:

Variant summary

Our verdict is Pathogenic. The variant received 13 ACMG points: 13P and 0B. PM1PM2PM5PP2PP3_StrongPP5_Moderate

The NM_000151.4(G6PC1):c.361A>G(p.Met121Val) variant causes a missense change involving the alteration of a conserved nucleotide. The variant allele was found at a frequency of 0.00000137 in 1,461,116 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. M121T) has been classified as Likely pathogenic.

Frequency

Genomes: not found (cov: 31)

Exomes 𝑓: 0.0000014 ( 0 hom. )

Consequence

G6PC1
NM_000151.4 missense

Scores

Clinical Significance

Likely pathogenic criteria provided, single submitter P:1U:1

Conservation

PhyloP100: 9.04

Publications

2 publications found

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 Gene-Disease associations (from GenCC):

glycogen storage disease due to glucose-6-phosphatase deficiency type IA
Inheritance: AR Classification: DEFINITIVE, STRONG Submitted by: Labcorp Genetics (formerly Invitae), G2P, PanelApp Australia, Myriad Women’s Health

G6PC1 links:

Genome browser will be placed here

ACMG classification

Classification was made for transcript

Our verdict: Pathogenic. The variant received 13 ACMG points.

PM1

In a hotspot region, there are 9 aminoacids with missense pathogenic changes in the window of +-8 aminoacids around while only 0 benign, 9 uncertain in NM_000151.4

PM2

Very rare variant in population databases, with high coverage;

PM5

Other missense variant is known to change same aminoacid residue: Variant chr17-42907544-T-C is described in ClinVar as Likely_pathogenic. ClinVar VariationId is 2085726.Status of the report is criteria_provided_single_submitter, 1 stars.

PP2

Missense variant in the gene, where a lot of missense mutations are associated with disease in ClinVar. The gene has 59 curated pathogenic missense variants (we use a threshold of 10). The gene has 19 curated benign missense variants. Gene score misZ: 0.2658 (below the threshold of 3.09). Trascript score misZ: 1.1659 (below the threshold of 3.09). GenCC associations: The gene is linked to glycogen storage disease due to glucose-6-phosphatase deficiency type IA.

PP3

MetaRNN computational evidence supports a deleterious effect, 0.942

PP5

Variant 17-42907543-A-G is Pathogenic according to our data. Variant chr17-42907543-A-G is described in ClinVar as Likely_pathogenic. ClinVar VariationId is 557664.Status of the report is criteria_provided_single_submitter, 1 stars.

Transcripts

RefSeq

Gene	Transcript	HGVSc	HGVSp	Effect	Exon rank	MANE	Protein	UniProt
G6PC1	NM_000151.4 link	c.361A>G	p.Met121Val	missense_variant	Exon 3 of 5	ENST00000253801.7	NP_000142.2	P35575-1
G6PC1	NM_001270397.2 link	c.341-57A>G		intron_variant	Intron 2 of 4		NP_001257326.1	P35575-2

Ensembl

Gene	Transcript	HGVSc	HGVSp	Effect	Exon rank	TSL	MANE	Protein	UniProt
G6PC1	ENST00000253801.7 link	c.361A>G	p.Met121Val	missense_variant	Exon 3 of 5	1	NM_000151.4	ENSP00000253801.1	P35575-1
G6PC1	ENST00000585489.1 link	c.361A>G	p.Met121Val	missense_variant	Exon 3 of 4	5		ENSP00000466202.1	K7ELS6
G6PC1	ENST00000592383.5 link	c.341-57A>G		intron_variant	Intron 2 of 4	2		ENSP00000465958.1	P35575-2

Frequencies

GnomAD3 genomes

Cov.:

GnomAD4 exome

AF:

0.00000137

AC:

AN:

1461116

Hom.:

Cov.:

AF XY:

0.00

AC XY:

AN XY:

726886

show subpopulations

African (AFR)

AF:

0.00

AC:

AN:

33462

American (AMR)

AF:

0.00

AC:

AN:

44716

Ashkenazi Jewish (ASJ)

AF:

0.00

AC:

AN:

26124

East Asian (EAS)

AF:

0.00

AC:

AN:

39696

South Asian (SAS)

AF:

0.00

AC:

AN:

86216

European-Finnish (FIN)

AF:

0.00

AC:

AN:

53412

Middle Eastern (MID)

AF:

0.00

AC:

AN:

5768

European-Non Finnish (NFE)

AF:

0.00000180

AC:

AN:

1111360

Other (OTH)

AF:

0.00

AC:

AN:

60362

Allele Balance Distribution

Red line indicates average allele balance

Average allele balance: 0.575

Heterozygous variant carriers

0.00

0.20

0.40

0.60

0.80

0.95

Allele balance

Age Distribution

Exome Het

Variant carriers

<30

30-35

35-40

40-45

45-50

50-55

55-60

60-65

65-70

70-75

75-80

>80

Age

GnomAD4 genome

Cov.:

ClinVar

Significance: Likely pathogenic

Submissions summary: Pathogenic:1Uncertain:1

Revision: criteria provided, single submitter

LINK: link

Submissions by phenotype

not provided

Pathogenic:1

Apr 05, 2024

Mayo Clinic Laboratories, Mayo Clinic

Significance:Likely pathogenic

Review Status:criteria provided, single submitter

Collection Method:clinical testing

PP3, PM2, PM3, PS3 -

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

Uncertain:1

Apr 11, 2018

Counsyl

Significance:Uncertain significance

Review Status:no assertion criteria provided

Collection Method:clinical testing

This submission and the accompanying classification are no longer maintained by the submitter. For more information on current observations and classification, please contact variantquestions@myriad.com. -

Computational scores

Source: dbNSFP v4.3

Name

Calibrated prediction

Score

Prediction

AlphaMissense

Pathogenic

0.57

BayesDel_addAF

Pathogenic

0.39

BayesDel_noAF

Pathogenic

0.32

CADD

Uncertain

(source)

DANN

Uncertain

0.99

DEOGEN2

Pathogenic

0.98

D;.

Eigen

Pathogenic

0.85

Eigen_PC

Pathogenic

0.79

FATHMM_MKL

Pathogenic

0.98

LIST_S2

Uncertain

0.96

D;D

M_CAP

Uncertain

0.23

MetaRNN

Pathogenic

0.94

D;D

MetaSVM

Uncertain

0.40

MutationAssessor

Pathogenic

3.0

M;.

PhyloP100

9.0

PrimateAI

Uncertain

0.61

PROVEAN

Uncertain

-3.7

D;.

REVEL

Pathogenic

0.93

Sift

Pathogenic

0.0

D;.

Sift4G

Pathogenic

0.0

D;D

Polyphen

0.99

D;.

Vest4

0.90

MutPred

0.82

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

MVP

0.96

MPC

0.80

ClinPred

1.0

GERP RS

5.0

RBP_binding_hub_radar

0.92

RBP_regulation_power_radar

2.8

Varity_R

0.91

gMVP

0.92

Mutation Taster

=6/94

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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Variant summary

Frequency

Consequence

Scores

Clinical Significance

Conservation

Publications

ACMG classification

Transcripts

RefSeq

Ensembl

Frequencies

Age Distribution

ClinVar

Submissions by phenotype

Computational scores

Splicing

Publications

Other links and lift over