NM_000035.4:c.264C>A

Variant names:

Variant summary

Our verdict is Likely benign. Variant got -5 ACMG points: 0P and 5B. BP4_StrongBS2_Supporting

The NM_000035.4(ALDOB):c.264C>A(p.Asp88Glu) variant causes a missense change involving the alteration of a non-conserved nucleotide. The variant allele was found at a frequency of 0.000197 in 1,614,144 control chromosomes in the GnomAD database, including 2 homozygotes. 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 Conflicting classifications of pathogenicity (no stars).

Frequency

Genomes: 𝑓 0.00015 ( 0 hom., cov: 32)

Exomes 𝑓: 0.00020 ( 2 hom. )

Consequence

ALDOB
NM_000035.4 missense

Scores

Clinical Significance

Conflicting classifications of pathogenicity criteria provided, conflicting classifications P:1U:5B:1

Conservation

PhyloP100: 0.678

Variant links:

Genes affected

ALDOB (HGNC:417): (aldolase, fructose-bisphosphate B) Fructose-1,6-bisphosphate aldolase (EC 4.1.2.13) is a tetrameric glycolytic enzyme that catalyzes the reversible conversion of fructose-1,6-bisphosphate to glyceraldehyde 3-phosphate and dihydroxyacetone phosphate. Vertebrates have 3 aldolase isozymes which are distinguished by their electrophoretic and catalytic properties. Differences indicate that aldolases A, B, and C are distinct proteins, the products of a family of related 'housekeeping' genes exhibiting developmentally regulated expression of the different isozymes. The developing embryo produces aldolase A, which is produced in even greater amounts in adult muscle where it can be as much as 5% of total cellular protein. In adult liver, kidney and intestine, aldolase A expression is repressed and aldolase B is produced. In brain and other nervous tissue, aldolase A and C are expressed about equally. There is a high degree of homology between aldolase A and C. Defects in ALDOB cause hereditary fructose intolerance. [provided by RefSeq, Dec 2008]

ALDOB links:

Genome browser will be placed here

ACMG classification

Classification made for transcript

Verdict is Likely_benign. Variant got -5 ACMG points.

BP4

Computational evidence support a benign effect (MetaRNN=0.010938764).

BS2

High Homozygotes in GnomAdExome4 at 2 AR geneVariant has number of homozygotes lower than other variant known as pathogenic in the gene, so the strength is limited to Supporting.

Transcripts

RefSeq

Gene	Transcript	HGVSc	HGVSp	Effect	Exon rank	MANE	Protein	UniProt
ALDOB	NM_000035.4 link	c.264C>A	p.Asp88Glu	missense_variant	Exon 3 of 9	ENST00000647789.2	NP_000026.2	P05062A0A024R145

Ensembl

Gene	Transcript	HGVSc	HGVSp	Effect	Exon rank	TSL	MANE	Protein	Appris	UniProt
ALDOB	ENST00000647789.2 link	c.264C>A	p.Asp88Glu	missense_variant	Exon 3 of 9		NM_000035.4	ENSP00000497767.1		P05062

Frequencies

GnomAD3 genomes

AF:

0.000145

AC:

AN:

152138

Hom.:

Cov.:

show subpopulations

Gnomad AFR

AF:

0.0000241

Gnomad AMI

AF:

0.00

Gnomad AMR

AF:

0.00

Gnomad ASJ

AF:

0.00

Gnomad EAS

AF:

0.00

Gnomad SAS

AF:

0.00436

Gnomad FIN

AF:

0.00

Gnomad MID

AF:

0.00

Gnomad NFE

AF:

0.00

Gnomad OTH

AF:

0.00

GnomAD3 exomes

AF:

0.000422

AC:

106

AN:

251246

Hom.:

AF XY:

0.000537

AC XY:

AN XY:

135826

show subpopulations

Gnomad AFR exome

AF:

0.0000615

Gnomad AMR exome

AF:

0.00

Gnomad ASJ exome

AF:

0.00

Gnomad EAS exome

AF:

0.00

Gnomad SAS exome

AF:

0.00343

Gnomad FIN exome

AF:

0.00

Gnomad NFE exome

AF:

0.00

Gnomad OTH exome

AF:

0.00

GnomAD4 exome

AF:

0.000202

AC:

295

AN:

1461888

Hom.:

Cov.:

AF XY:

0.000322

AC XY:

234

AN XY:

727248

show subpopulations

Gnomad4 AFR exome

AF:

0.0000299

Gnomad4 AMR exome

AF:

0.00

Gnomad4 ASJ exome

AF:

0.00

Gnomad4 EAS exome

AF:

0.00

Gnomad4 SAS exome

AF:

0.00327

Gnomad4 FIN exome

AF:

0.00

Gnomad4 NFE exome

AF:

8.99e-7

Gnomad4 OTH exome

AF:

0.000182

GnomAD4 genome

AF:

0.000151

AC:

AN:

152256

Hom.:

Cov.:

AF XY:

0.000215

AC XY:

AN XY:

74434

show subpopulations

Gnomad4 AFR

AF:

0.0000241

Gnomad4 AMR

AF:

0.00

Gnomad4 ASJ

AF:

0.00

Gnomad4 EAS

AF:

0.00

Gnomad4 SAS

AF:

0.00457

Gnomad4 FIN

AF:

0.00

Gnomad4 NFE

AF:

0.00

Gnomad4 OTH

AF:

0.00

Bravo

AF:

0.0000453

ExAC

AF:

0.000502

AC:

Asia WGS

AF:

0.000289

AC:

AN:

3478

ClinVar

Significance: Conflicting classifications of pathogenicity

Submissions summary: Pathogenic:1Uncertain:5Benign:1

Revision: criteria provided, conflicting classifications

LINK: link

Submissions by phenotype

Hereditary fructosuria

Pathogenic:1Uncertain:2Benign:1

Mar 18, 2021

ATS em Genética Clínica, Universidade Federal do Rio Grande do Sul

Significance: Likely pathogenic

Review Status: no assertion criteria provided

Collection Method: literature only

- -

Apr 11, 2022

Department of Pathology and Laboratory Medicine, Sinai Health System

Significance: Uncertain significance

Review Status: criteria provided, single submitter

Collection Method: research

- -

Nov 03, 2021

Myriad Genetics, Inc.

Significance: Uncertain significance

Review Status: criteria provided, single submitter

Collection Method: clinical testing

NM_000035.3(ALDOB):c.264C>A(D88E) is a missense variant classified as a variant of uncertain significance in the context of hereditary fructose intolerance. D88E has been observed in in cases with relevant disease (PMID: 26633542). Functional assessments of this variant are not available in the literature. D88E has been observed in population frequency databases (gnomAD: SAS 0.34%). In summary, there is insufficient evidence to classify NM_000035.3(ALDOB):c.264C>A(D88E) as pathogenic or benign. Please note: this variant was assessed in the context of healthy population screening. -

Mar 20, 2024

Labcorp Genetics (formerly Invitae), Labcorp

Significance: Likely benign

Review Status: criteria provided, single submitter

Collection Method: clinical testing

- -

not provided

Uncertain:2

Aug 29, 2016

GeneDx

Significance: Uncertain significance

Review Status: criteria provided, single submitter

Collection Method: clinical testing

The D88E variant in the ALDOB gene has not been reported previously as a pathogenic variant nor as a benign polymorphism, to our knowledge. The D88E variant was not observed in approximately 6,500 individuals of European and African American ancestry in the NHLBI Exome Sequencing Project; however, the D88E variant was observed in the Exome Aggregation Consortium (ExAC) data set on 0.39% of alleles (60/16512) from individuals of South Asian background, including one homozygous individual, indicating it may be a rare benign variant in this population. The D88E variant is a conservative amino acid substitution, which occurs at a position that is conserved among mammals. In silico analysis is inconsistent in its predictions as to whether or not the variant is damaging to the protein structure/function. Based on review of the current data in the context of the 2015 ACMG standards and guidelines for the interpretation of sequence variants (Richards et al., 2015), we now interpret D88E as a variant of uncertain significance. -

Oct 12, 2017

Eurofins Ntd Llc (ga)

Significance: Uncertain significance

Review Status: criteria provided, single submitter

Collection Method: clinical testing

- -

not specified

Uncertain:1

Feb 24, 2025

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

Significance: Uncertain significance

Review Status: criteria provided, single submitter

Collection Method: clinical testing

Variant summary: ALDOB c.264C>A (p.Asp88Glu) results in a conservative amino acid change in the encoded protein sequence. Three of four in-silico tools predict a benign effect of the variant on protein function. The variant allele was found at a frequency of 0.00042 in 251246 control chromosomes (gnomAD). This frequency is not significantly higher than estimated for a pathogenic variant in ALDOB causing Hereditary Fructose Intolerance (0.00042 vs 0.0045), allowing no conclusion about variant significance. c.264C>A has been reported in the literature in individuals affected with abnormality of the nervous system or thyroid hormone resistency (Retterer_2015, Akcan_2024). These reports do not provide unequivocal conclusions about association of the variant with Hereditary Fructose Intolerance. To our knowledge, no experimental evidence demonstrating an impact on protein function has been reported. The following publications have been ascertained in the context of this evaluation (PMID: 38682389, 26633542). ClinVar contains an entry for this variant (Variation ID: 285374). Based on the evidence outlined above, the variant was classified as uncertain significance. -

Computational scores

Source: dbNSFP v4.3

Name

Calibrated prediction

Score

Prediction

AlphaMissense

Pathogenic

0.84

BayesDel_addAF

Benign

-0.32

BayesDel_noAF

Benign

-0.23

CADD

Benign

DANN

Uncertain

0.99

DEOGEN2

Uncertain

0.67

D;D;D;T;D;.

Eigen

Benign

0.0040

Eigen_PC

Benign

0.11

FATHMM_MKL

Uncertain

0.82

LIST_S2

Uncertain

0.95

.;.;.;D;D;D

M_CAP

Benign

0.042

MetaRNN

Benign

0.011

T;T;T;T;T;T

MetaSVM

Uncertain

-0.083

MutationAssessor

Uncertain

2.2

M;M;M;.;M;.

PrimateAI

Uncertain

0.52

PROVEAN

Benign

-0.42

N;.;.;.;.;.

REVEL

Benign

0.29

Sift

Uncertain

0.0080

D;.;.;.;.;.

Sift4G

Uncertain

0.059

T;.;.;T;.;.

Polyphen

0.38

B;B;B;.;B;.

Vest4

0.46

MutPred

0.34

Gain of disorder (P = 0.1089);Gain of disorder (P = 0.1089);Gain of disorder (P = 0.1089);Gain of disorder (P = 0.1089);Gain of disorder (P = 0.1089);Gain of disorder (P = 0.1089);

MVP

0.79

MPC

0.019

ClinPred

0.099

GERP RS

3.0

Varity_R

0.70

gMVP

0.76

Splicing

Name

Calibrated prediction

Score

Prediction

SpliceAI score (max)

0.010

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