chr5-140114206-G-T

Position:

• chr5-140114206-G-T

Variant summary

Our verdict is Pathogenic. Variant got 12 ACMG points: 12P and 0B. PVS1 PM2 PP5_Moderate

The NM_005859.5(PURA):​c.25G>T​(p.Glu9Ter) variant causes a stop gained 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. Variant has been reported in ClinVar as Pathogenic (★). Synonymous variant affecting the same amino acid position (i.e. E9E) has been classified as Likely benign.

• Frequency:
  • Genomes: not found (cov: 31)
  • Exomes 𝑓: 0.0 (0 hom.)
  • Failed GnomAD Quality Control
• Consequence: PURA NM_005859.5 stop_gained
• Clinical Significance: Pathogenic criteria provided, single submitter P:1
• Conservation: PhyloP100: 3.20

Genes affected

PURA (HGNC:9701): (purine rich element binding protein A) This gene product is a sequence-specific, single-stranded DNA-binding protein. It binds preferentially to the single strand of the purine-rich element termed PUR, which is present at origins of replication and in gene flanking regions in a variety of eukaryotes from yeasts through humans. Thus, it is implicated in the control of both DNA replication and transcription. Deletion of this gene has been associated with myelodysplastic syndrome and acute myelogenous leukemia. [provided by RefSeq, Jul 2008]

ACMG classification

Verdict is Pathogenic. Variant got 12 ACMG points.

• PVS1: Loss of function variant, product does not undergo nonsense mediated mRNA decay. Variant is located in the 3'-most exon, not predicted to undergo nonsense mediated mRNA decay. There are 151 pathogenic variants in the truncated region.
• PM2: Very rare variant in population databases, with high coverage
• PP5: Variant 5-140114206-G-T is Pathogenic according to our data. Variant chr5-140114206-G-T is described in ClinVar as [Pathogenic]. Clinvar id is 2418936.Status of the report is criteria_provided_single_submitter, 1 stars.

Transcripts

RefSeq

Gene	Transcript	HGVSc	HGVSp	Effect	#exon/exons	MANE	UniProt
PURA	NM_005859.5	c.25G>T	p.Glu9Ter	stop_gained	1/1	ENST00000331327.5

Ensembl

Gene	Transcript	HGVSc	HGVSp	Effect	#exon/exons	TSL	MANE	Appris	UniProt
PURA	ENST00000331327.5	c.25G>T	p.Glu9Ter	stop_gained	1/1		NM_005859.5	P1
PURA	ENST00000651386.1	c.25G>T	p.Glu9Ter	stop_gained	2/2			P1
PURA	ENST00000505703.2	c.25G>T	p.Glu9Ter	stop_gained	2/2	3
PURA	ENST00000502351.1	c.25G>T	p.Glu9Ter	stop_gained	2/2	2

Frequencies

GnomAD3 genomes Cov.: 31

GnomAD4 exome Data not reliable, filtered out with message: AC0 AF: 0.00 AC: 0 AN: 778830 Hom.: 0 Cov.: 10 AF XY: 0.00 AC XY: 0 AN XY: 376534

Gnomad4 AFR exome AF: 0.00

Gnomad4 AMR exome AF: 0.00

Gnomad4 ASJ exome AF: 0.00

Gnomad4 EAS exome AF: 0.00

Gnomad4 SAS exome AF: 0.00

Gnomad4 FIN exome AF: 0.00

Gnomad4 NFE exome AF: 0.00

Gnomad4 OTH exome AF: 0.00

GnomAD4 genome Cov.: 31

ClinVar

Significance: Pathogenic

Submissions summary: Pathogenic:1

Revision: criteria provided, single submitter

Submissions by phenotype

PURA-related severe neonatal hypotonia-seizures-encephalopathy syndrome Pathogenic:1

Pathogenic, criteria provided, single submitter

clinical testing

Labcorp Genetics (formerly Invitae), Labcorp

Jun 15, 2022

For these reasons, this variant has been classified as Pathogenic. This variant disrupts a region of the PURA protein in which other variant(s) (p.Tyr261*) have been determined to be pathogenic (PMID: 25439098). This suggests that this is a clinically significant region of the protein, and that variants that disrupt it are likely to be disease-causing. This premature translational stop signal has been observed in individual(s) with PURA syndrome (PMID: 29097605). In at least one individual the variant was observed to be de novo. The frequency data for this variant in the population databases is considered unreliable, as metrics indicate insufficient coverage at this position in the gnomAD database. This sequence change creates a premature translational stop signal (p.Glu9*) in the PURA gene. While this is not anticipated to result in nonsense mediated decay, it is expected to disrupt the last 314 amino acid(s) of the PURA protein. -

Computational scores

Source: dbNSFP v4.3

Name	Calibrated prediction	Score	Prediction
BayesDel_addAF	Pathogenic	0.63	D
BayesDel_noAF	Pathogenic	0.66
CADD	Pathogenic	39
DANN	Uncertain	0.99
Eigen	Pathogenic	0.86
Eigen_PC	Uncertain	0.65
FATHMM_MKL	Uncertain	0.81	D
MutationTaster	Benign	1.0	D
Vest4		0.69
GERP RS		3.4

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

No publications associated with this variant yet.

Other links and lift over

hg19: chr5-139493791;