rs587780945

Variant names:

• chr17-42900879-G-A
• rs587780945
• NM_000151.4:c.3G>A

Variant summary

Our verdict is Uncertain significance. The variant received 3 ACMG points: 3P and 0B. PVS1_Supporting PM2

The NM_000151.4(G6PC1):​c.3G>A​(p.Met1?) variant causes a start lost change involving the alteration of a non-conserved nucleotide. The variant was absent in control chromosomes in GnomAD project. In-silico tool predicts a pathogenic outcome for this variant. No clinical diagnostic laboratories have submitted clinical-significance assessments for this variant to ClinVar.

• Frequency: Genomes: not found (cov: 32)
• Consequence: G6PC1 NM_000151.4 start_lost
• Clinical Significance: Not reported in ClinVar
• Conservation: PhyloP100: 2.16
• Publications: 0 publications found

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

ACMG classification

Our verdict: Uncertain_significance. The variant received 3 ACMG points.

• PVS1: Start lost variant, no pathogenic variants between lost start and next in-frame start position. Next in-frame start position is after 5 codons. Genomic position: 42900889. Lost 0.012 part of the original CDS.
• PM2: Very rare variant in population databases, with high coverage

Variant Effect in Transcripts

ACMG analysis was done for transcript: NM_000151.4. You can select a different transcript below to see updated ACMG assignments.

RefSeq Transcripts

Selected	Gene	Transcript	Tags	HGVSc	HGVSp	Effect	Exon Rank	Protein	UniProt
	G6PC1	NM_000151.4	MANE Select	c.3G>A	p.Met1?	start_lost	Exon 1 of 5	NP_000142.2
	G6PC1	NM_001270397.2		c.3G>A	p.Met1?	start_lost	Exon 1 of 5	NP_001257326.1

Ensembl Transcripts

Selected	Gene	Transcript	Tags	HGVSc	HGVSp	Effect	Exon Rank	Protein	UniProt
	G6PC1	ENST00000253801.7	TSL:1 MANE Select	c.3G>A	p.Met1?	start_lost	Exon 1 of 5	ENSP00000253801.1
	G6PC1	ENST00000592383.5	TSL:2	c.3G>A	p.Met1?	start_lost	Exon 1 of 5	ENSP00000465958.1
	G6PC1	ENST00000585489.1	TSL:5	c.3G>A	p.Met1?	start_lost	Exon 1 of 4	ENSP00000466202.1

Frequencies

GnomAD3 genomes Cov.: 32

GnomAD4 exome Cov.: 31

GnomAD4 genome Cov.: 32

ClinVar

Not reported in ClinVar

Computational scores

Source: dbNSFP v4.9

Name	Calibrated prediction	Score	Prediction
BayesDel_addAF	Pathogenic	0.63	D
BayesDel_noAF	Pathogenic	0.41
CADD	Benign	21
DANN	Uncertain	1.0
DEOGEN2	Uncertain	0.52	D
Eigen	Benign	0.025
Eigen_PC	Benign	0.14
FATHMM_MKL	Uncertain	0.96	D
LIST_S2	Uncertain	0.90	D
M_CAP	Uncertain	0.10	D
MetaRNN	Pathogenic	0.98	D
MetaSVM	Benign	-0.46	T
PhyloP100		2.2
PROVEAN	Benign	-0.95	N
REVEL	Uncertain	0.44
Sift	Pathogenic	0.0	D
Sift4G	Pathogenic	0.0	D
Polyphen		0.17	B
Vest4		0.92
MutPred		0.96		Loss of helix (P = 0.0196)
MVP		0.80
ClinPred		1.0	D
GERP RS		4.3
PromoterAI		-0.025	Neutral
RBP_binding_hub_radar		0.0
RBP_regulation_power_radar		1.6
Varity_R		0.89
gMVP		0.59

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

Other links and lift over

dbSNP: rs587780945; hg19: chr17-41052896;