9-101424901-C-CA

Variant names:

• chr9-101424901-C-CA
• rs1554702328
• NM_000035.4:c.940dupT

Variant summary

Our verdict is Pathogenic. The variant received 11 ACMG points: 11P and 0B. PVS1 PM2 PP5

The NM_000035.4(ALDOB):​c.940dupT​(p.Trp314LeufsTer22) variant causes a frameshift change involving the alteration of a conserved nucleotide. The variant was absent in control chromosomes in GnomAD project. Variant has been reported in ClinVar as Likely pathogenic (no stars). Variant results in nonsense mediated mRNA decay.

• Frequency: Genomes: not found (cov: 33)
• Consequence: ALDOB NM_000035.4 frameshift
• Clinical Significance: Likely pathogenic no assertion criteria provided P:2
• Conservation: PhyloP100: 9.32
• Publications: 0 publications found

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 Gene-Disease associations (from GenCC):

• hereditary fructose intolerance

  Inheritance: AR Classification: DEFINITIVE, STRONG, SUPPORTIVE Submitted by: Ambry Genetics, Myriad Women’s Health, Genomics England PanelApp, Labcorp Genetics (formerly Invitae), Orphanet
• complex neurodevelopmental disorder

  Inheritance: AR Classification: LIMITED Submitted by: Ambry Genetics

ACMG classification

Our verdict: Pathogenic. The variant received 11 ACMG points.

• PVS1: Loss of function variant, product undergoes nonsense mediated mRNA decay. LoF is a known mechanism of disease.
• PM2: Very rare variant in population databases, with high coverage
• PP5: Variant 9-101424901-C-CA is Pathogenic according to our data. Variant chr9-101424901-C-CA is described in ClinVar as Likely_pathogenic. ClinVar VariationId is 555807.Status of the report is no_assertion_criteria_provided, 0 stars.

Variant Effect in Transcripts

ACMG analysis was done for transcript: NM_000035.4. 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
	ALDOB	NM_000035.4	MANE Select	c.940dupT	p.Trp314LeufsTer22	frameshift	Exon 8 of 9	NP_000026.2

Ensembl Transcripts

Selected	Gene	Transcript	Tags	HGVSc	HGVSp	Effect	Exon Rank	Protein	UniProt
	ALDOB	ENST00000647789.2	MANE Select	c.940dupT	p.Trp314LeufsTer22	frameshift	Exon 8 of 9	ENSP00000497767.1
	ALDOB	ENST00000648064.1		c.940dupT	p.Trp314LeufsTer22	frameshift	Exon 8 of 9	ENSP00000497990.1
	ALDOB	ENST00000648758.1		c.940dupT	p.Trp314LeufsTer22	frameshift	Exon 8 of 9	ENSP00000497731.1

Frequencies

GnomAD3 genomes Cov.: 33

GnomAD4 exome Cov.: 33

GnomAD4 genome Cov.: 33

ClinVar

Significance: Likely pathogenic

Submissions summary: Pathogenic:2

Revision: no assertion criteria provided

Submissions by phenotype

Hereditary fructosuria Pathogenic:2

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

Dec 22, 2017

Counsyl

Significance: Likely pathogenic

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 v4.9

Name	Calibrated prediction	Score	Prediction
PhyloP100		9.3
Mutation Taster		=1/199	disease causing (ClinVar)

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: rs1554702328; hg19: chr9-104187183;