NM_000507.4:c.841G>A

Variant names:

Variant summary

Our verdict is Pathogenic. Variant got 16 ACMG points: 16P and 0B. PM1PM2PP3_StrongPP5_Very_Strong

The NM_000507.4(FBP1):c.841G>A(p.Glu281Lys) variant causes a missense change involving the alteration of a conserved nucleotide. The variant allele was found at a frequency of 0.0000415 in 1,614,142 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 (★★).

Frequency

Genomes: 𝑓 0.000013 ( 0 hom., cov: 32)

Exomes 𝑓: 0.000044 ( 0 hom. )

Consequence

FBP1
NM_000507.4 missense

Scores

Clinical Significance

Pathogenic/Likely pathogenic criteria provided, multiple submitters, no conflicts P:13

Conservation

PhyloP100: 7.73

Variant links:

Genes affected

FBP1 (HGNC:3606): (fructose-bisphosphatase 1) Fructose-1,6-bisphosphatase 1, a gluconeogenesis regulatory enzyme, catalyzes the hydrolysis of fructose 1,6-bisphosphate to fructose 6-phosphate and inorganic phosphate. Fructose-1,6-diphosphatase deficiency is associated with hypoglycemia and metabolic acidosis. [provided by RefSeq, Jul 2008]

FBP1 links:

PCAT7 (HGNC:48824): (prostate cancer associated transcript 7)

PCAT7 links:

Genome browser will be placed here

ACMG classification

Classification made for transcript

Verdict is Pathogenic. Variant got 16 ACMG points.

PM1

In a binding_site (size 0) in uniprot entity F16P1_HUMAN

PM2

Very rare variant in population databases, with high coverage;

PP3

MetaRNN computational evidence supports a deleterious effect, 0.961

PP5

Variant 9-94603557-C-T is Pathogenic according to our data. Variant chr9-94603557-C-T is described in ClinVar as [Likely_pathogenic]. Clinvar id is 381580.Status of the report is criteria_provided_multiple_submitters_no_conflicts, 2 stars.

Transcripts

RefSeq

Gene	Transcript	HGVSc	HGVSp	Effect	Exon rank	MANE	Protein	UniProt
FBP1	NM_000507.4 link	c.841G>A	p.Glu281Lys	missense_variant	Exon 7 of 7	ENST00000375326.9	NP_000498.2	P09467
FBP1	NM_001127628.2 link	c.841G>A	p.Glu281Lys	missense_variant	Exon 8 of 8		NP_001121100.1	P09467Q2TU34
FBP1	XM_006717005.5 link	c.595G>A	p.Glu199Lys	missense_variant	Exon 7 of 7		XP_006717068.1

Ensembl

Gene	Transcript	HGVSc	HGVSp	Effect	Exon rank	TSL	MANE	Protein	Appris	UniProt
FBP1	ENST00000375326.9 link	c.841G>A	p.Glu281Lys	missense_variant	Exon 7 of 7	1	NM_000507.4	ENSP00000364475.5		P09467

Frequencies

GnomAD3 genomes

AF:

0.0000131

AC:

AN:

152172

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:

0.000414

Gnomad FIN

AF:

0.00

Gnomad MID

AF:

0.00

Gnomad NFE

AF:

0.00

Gnomad OTH

AF:

0.00

GnomAD3 exomes

AF:

0.0000756

AC:

AN:

251476

Hom.:

AF XY:

0.000118

AC XY:

AN XY:

135920

show subpopulations

Gnomad AFR exome

AF:

0.00

Gnomad AMR exome

AF:

0.00

Gnomad ASJ exome

AF:

0.00

Gnomad EAS exome

AF:

0.0000544

Gnomad SAS exome

AF:

0.000588

Gnomad FIN exome

AF:

0.00

Gnomad NFE exome

AF:

0.00

Gnomad OTH exome

AF:

0.00

GnomAD4 exome

AF:

0.0000445

AC:

AN:

1461852

Hom.:

Cov.:

AF XY:

0.0000715

AC XY:

AN XY:

727234

show subpopulations

Gnomad4 AFR exome

AF:

0.00

Gnomad4 AMR exome

AF:

0.00

Gnomad4 ASJ exome

AF:

0.00

Gnomad4 EAS exome

AF:

0.0000252

Gnomad4 SAS exome

AF:

0.000684

Gnomad4 FIN exome

AF:

0.00

Gnomad4 NFE exome

AF:

0.00000180

Gnomad4 OTH exome

AF:

0.0000331

GnomAD4 genome

AF:

0.0000131

AC:

AN:

152290

Hom.:

Cov.:

AF XY:

0.00

AC XY:

AN XY:

74472

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:

0.000415

Gnomad4 FIN

AF:

0.00

Gnomad4 NFE

AF:

0.00

Gnomad4 OTH

AF:

0.00

Alfa

AF:

0.0000993

Hom.:

Bravo

AF:

0.00000378

ExAC

AF:

0.0000741

AC:

ClinVar

Significance: Pathogenic/Likely pathogenic

Submissions summary: Pathogenic:13

Revision: criteria provided, multiple submitters, no conflicts

LINK: link

Submissions by phenotype

Fructose-biphosphatase deficiency

Pathogenic:12

Jun 17, 2024

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

Significance: Pathogenic

Review Status: criteria provided, single submitter

Collection Method: clinical testing

Variant summary: FBP1 c.841G>A (p.Glu281Lys) results in a conservative amino acid change located in the fructose-1-6-bisphosphatase class 1, C-terminal domain (IPR044015) of the encoded protein sequence. Four of five in-silico tools predict a damaging effect of the variant on protein function. The variant allele was found at a frequency of 7.6e-05 in 251476 control chromosomes. This frequency is not significantly higher than estimated for a pathogenic variant in FBP1 causing Fructose-biphosphatase deficiency, allowing no conclusion about variant significance. c.841G>A has been reported in the literature in the compound heterozygous and homozygous states in multiple individuals affected with Fructose-biphosphatase deficiency (e.g. Afroze_2013, Kato_2015, Bhai_2018). These data indicate that the variant is very likely to be associated with disease. At least one in vitro study in HepG2 cells reports experimental evidence that this variant results in significantly reduced enzyme activity compared to wildtype. The following publications have been ascertained in the context of this evaluation (PMID: 23881342, 29774539, 26549536, 37507476). ClinVar contains an entry for this variant (Variation ID: 381580). Based on the evidence outlined above, the variant was classified as pathogenic. -

Kasturba Medical College, Manipal, Kasturba Medical College, Manipal, Manipal Academy of Higher Education, Manipal, India

Significance: Likely pathogenic

Review Status: criteria provided, single submitter

Collection Method: clinical testing

- -

May 22, 2022

3billion

Significance: Pathogenic

Review Status: criteria provided, single submitter

Collection Method: clinical testing

The variant is observed at an extremely low frequency in the gnomAD v2.1.1 dataset (total allele frequency: 0.008%). In silico tool predictions suggest damaging effect of the variant on gene or gene product (REVEL: 0.82; 3Cnet: 0.97). Same nucleotide change resulting in same amino acid change has been previously reported as pathogenic/likely pathogenic with strong evidence (ClinVar ID: VCV000381580). The variant has been observed in multiple (>3) similarly affected unrelated individuals (PMID:23881342, 27101822, 29016355, 29774539). Therefore, this variant is classified as pathogenic according to the recommendation of ACMG/AMP guideline. -

Centogene AG - the Rare Disease Company

Significance: Pathogenic

Review Status: criteria provided, single submitter

Collection Method: clinical testing

- -

Jul 10, 2012

Institute of Medical Genetics and Genomics, Sir Ganga Ram Hospital

Significance: Pathogenic

Review Status: criteria provided, single submitter

Collection Method: clinical testing

- -

Apr 09, 2021

Revvity Omics, Revvity

Significance: Pathogenic

Review Status: criteria provided, single submitter

Collection Method: clinical testing

- -

Mar 06, 2022

Baylor Genetics

Significance: Pathogenic

Review Status: criteria provided, single submitter

Collection Method: clinical testing

- -

Apr 19, 2024

Labcorp Genetics (formerly Invitae), Labcorp

Significance: Pathogenic

Review Status: criteria provided, single submitter

Collection Method: clinical testing

This sequence change replaces glutamic acid, which is acidic and polar, with lysine, which is basic and polar, at codon 281 of the FBP1 protein (p.Glu281Lys). This variant is present in population databases (rs566453434, gnomAD 0.06%). This missense change has been observed in individuals with fructose-1,6-bisphosphatase deficiency (PMID: 23881342, 27101822, 29016355, 29774539; Invitae). It has also been observed to segregate with disease in related individuals. ClinVar contains an entry for this variant (Variation ID: 381580). 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 FBP1 protein function with a positive predictive value of 80%. For these reasons, this variant has been classified as Pathogenic. -

Lifecell International Pvt. Ltd

Significance: Likely pathogenic

Review Status: criteria provided, single submitter

Collection Method: clinical testing

A Heterozygous Missense variant c.841G>A in Exon 7 of the FBP1 gene that results in the amino acid substitution p.Glu281Lys was identified. The observed variant has a minor allele frequency of 0.00008% in gnomAD exomes and genomes, respectively. The severity of the impact of this variant on the protein is high, based on the effect of the protein and REVEL score. Rare Exome Variant Ensemble Learner (REVEL) is an ensembl method for predicting the pathogenicity of missense variants based on a combination of scores from 13 individual tools: MutPred, FATHMM v2.3, VEST 3.0, PolyPhen-2, SIFT, PROVEAN, MutationAssessor, MutationTaster, LRT, GERP++, SiPhy, phyloP, and phastCons. The REVEL score for an individual missense variant can range from 0 to 1, with higher scores reflecting greater likelihood that the variant is disease-causing. ClinVar has also classified this variant as Pathogenic/ Likely Pathogenic with 2 stars, criteria provided, multiple submitters, no conflicts (Variant ID: 381580). This variant has previously been reported for fructose-1,6-bisphosphatase deficiency by Santer R,et,al.,2016. Based on the above evidence this variant has been classified as Likely Pathogenic according to the ACMG guidelines. -

Jun 19, 2024

Fulgent Genetics, Fulgent Genetics

Significance: Likely pathogenic

Review Status: criteria provided, single submitter

Collection Method: clinical testing

- -

Oct 11, 2020

Biochemical Molecular Genetic Laboratory, King Abdulaziz Medical City

Significance: Likely pathogenic

Review Status: no assertion criteria provided

Collection Method: clinical testing

- -

Dec 21, 2022

Center for Molecular Medicine, Children’s Hospital of Fudan University

Significance: Pathogenic

Review Status: criteria provided, single submitter

Collection Method: clinical testing

- -

not provided

Pathogenic:1

Jul 04, 2023

GeneDx

Significance: Pathogenic

Review Status: criteria provided, single submitter

Collection Method: clinical testing

In silico analysis supports that this missense variant has a deleterious effect on protein structure/function; This variant is associated with the following publications: (PMID: 27101822, 29774539, 29016355, 31584309, 23881342, 33083013, 26549536) -

Computational scores

Source: dbNSFP v4.3

Name

Calibrated prediction

Score

Prediction

AlphaMissense

Pathogenic

0.99

BayesDel_addAF

Pathogenic

0.19

BayesDel_noAF

Pathogenic

0.39

CADD

Pathogenic

DANN

Pathogenic

1.0

DEOGEN2

Uncertain

0.69

.;D;D

Eigen

Pathogenic

0.90

Eigen_PC

Pathogenic

0.75

FATHMM_MKL

Uncertain

0.96

LIST_S2

Pathogenic

1.0

D;.;D

M_CAP

Pathogenic

0.58

MetaRNN

Pathogenic

0.96

D;D;D

MetaSVM

Pathogenic

0.86

MutationAssessor

Pathogenic

4.0

.;H;H

PrimateAI

Uncertain

0.68

PROVEAN

Uncertain

-3.6

.;D;D

REVEL

Pathogenic

0.82

Sift

Pathogenic

0.0

.;D;D

Sift4G

Pathogenic

0.0

.;D;D

Polyphen

1.0

.;D;D

Vest4

0.90

MutPred

0.90

.;Gain of methylation at E281 (P = 0.0036);Gain of methylation at E281 (P = 0.0036);

MVP

0.95

MPC

1.1

ClinPred

0.97

GERP RS

5.4

Varity_R

0.94

gMVP

0.92

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