rs727502867

Positions:

• chr11-763901-GC-G

Variant summary

Our verdict is Pathogenic. Variant got 18 ACMG points: 18P and 0B. PVS1 PM2 PP5_Very_Strong

The NM_006755.2(TALDO1):​c.793del​(p.Gln265ArgfsTer56) variant causes a frameshift change. The variant was absent in control chromosomes in GnomAD project. Variant has been reported in ClinVar as Pathogenic (★★). Variant results in nonsense mediated mRNA decay.

• Frequency: Genomes: not found (cov: 31)
• Consequence: TALDO1 NM_006755.2 frameshift
• Clinical Significance: Pathogenic criteria provided, multiple submitters, no conflicts P:6
• Conservation: PhyloP100: 4.27

Genes affected

TALDO1 (HGNC:11559): (transaldolase 1) Transaldolase 1 is a key enzyme of the nonoxidative pentose phosphate pathway providing ribose-5-phosphate for nucleic acid synthesis and NADPH for lipid biosynthesis. This pathway can also maintain glutathione at a reduced state and thus protect sulfhydryl groups and cellular integrity from oxygen radicals. The functional gene of transaldolase 1 is located on chromosome 11 and a pseudogene is identified on chromosome 1 but there are conflicting map locations. The second and third exon of this gene were developed by insertion of a retrotransposable element. This gene is thought to be involved in multiple sclerosis. [provided by RefSeq, Jul 2008]

ACMG classification

Verdict is Pathogenic. Variant got 18 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 11-763901-GC-G is Pathogenic according to our data. Variant chr11-763901-GC-G is described in ClinVar as [Pathogenic]. Clinvar id is 162622.Status of the report is criteria_provided_multiple_submitters_no_conflicts, 2 stars.

Transcripts

RefSeq

Gene	Transcript	HGVSc	HGVSp	Effect	#exon/exons	MANE	UniProt
TALDO1	NM_006755.2	c.793del	p.Gln265ArgfsTer56	frameshift_variant	6/8	ENST00000319006.8

Ensembl

Gene	Transcript	HGVSc	HGVSp	Effect	#exon/exons	TSL	MANE	Appris	UniProt
TALDO1	ENST00000319006.8	c.793del	p.Gln265ArgfsTer56	frameshift_variant	6/8	1	NM_006755.2	P1
TALDO1	ENST00000528097.5	c.793del	p.Gln265ArgfsTer17	frameshift_variant	6/8	1

Frequencies

GnomAD3 genomes Cov.: 31

GnomAD4 exome Cov.: 33

GnomAD4 genome Cov.: 31

ClinVar

Significance: Pathogenic

Submissions summary: Pathogenic:6

Revision: criteria provided, multiple submitters, no conflicts

Submissions by phenotype

Deficiency of transaldolase Pathogenic:5

Pathogenic, no assertion criteria provided	clinical testing	Biochemical Molecular Genetic Laboratory, King Abdulaziz Medical City	Sep 26, 2019	- -
Pathogenic, criteria provided, single submitter	clinical testing	Revvity Omics, Revvity	May 06, 2021	- -
Pathogenic, criteria provided, single submitter	clinical testing	Center for Genomic Medicine, King Faisal Specialist Hospital and Research Center	Mar 26, 2024	- -
Pathogenic, criteria provided, single submitter	clinical testing	Baylor Genetics	Apr 19, 2019	This variant was determined to be pathogenic according to ACMG Guidelines, 2015 [PMID:25741868]. This variant has been previously reported as disease-causing [PMID 23315216] -
Pathogenic, no assertion criteria provided	literature only	OMIM	Nov 01, 2013	- -

not provided Pathogenic:1

Pathogenic, criteria provided, single submitter

clinical testing

Invitae

Aug 18, 2021

For these reasons, this variant has been classified as Pathogenic. This sequence change creates a premature translational stop signal (p.Gln265Argfs*56) in the TALDO1 gene. While this is not anticipated to result in nonsense mediated decay, it is expected to disrupt the last 73 amino acid(s) of the TALDO1 protein. This variant is not present in population databases (ExAC no frequency). This premature translational stop signal has been observed in individual(s) with transaldolase deficiency (PMID: 23315216; Invitae). ClinVar contains an entry for this variant (Variation ID: 162622). -

Computational scores

Source: dbNSFP v4.3

Splicing

Name	Calibrated prediction	Score	Prediction
SpliceAI score (max)		0.070		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

Other links and lift over

dbSNP: rs727502867; hg19: chr11-763901;