chr5-140114218-GC-G

Position:

• chr5-140114218-GC-G

Variant summary

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

The NM_005859.5(PURA):​c.38del​(p.Ala13GlyfsTer65) variant causes a frameshift change involving the alteration of a non-conserved nucleotide. The variant was absent in control chromosomes in GnomAD project. Variant has been reported in ClinVar as Pathogenic (★). Synonymous variant affecting the same amino acid position (i.e. A13A) has been classified as Likely benign.

• Frequency: Genomes: not found (cov: 31)
• Consequence: PURA NM_005859.5 frameshift
• Clinical Significance: Pathogenic criteria provided, single submitter P:1
• Conservation: PhyloP100: 2.34

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 149 pathogenic variants in the truncated region.
• PM2: Very rare variant in population databases, with high coverage
• PP5: Variant 5-140114218-GC-G is Pathogenic according to our data. Variant chr5-140114218-GC-G is described in ClinVar as [Pathogenic]. Clinvar id is 817671.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.38del	p.Ala13GlyfsTer65	frameshift_variant	1/1	ENST00000331327.5

Ensembl

Gene	Transcript	HGVSc	HGVSp	Effect	#exon/exons	TSL	MANE	Appris	UniProt
PURA	ENST00000331327.5	c.38del	p.Ala13GlyfsTer65	frameshift_variant	1/1		NM_005859.5	P1
PURA	ENST00000651386.1	c.38del	p.Ala13GlyfsTer65	frameshift_variant	2/2			P1
PURA	ENST00000505703.2	c.38del	p.Ala13GlyfsTer65	frameshift_variant	2/2	3
PURA	ENST00000502351.1	c.38del	p.Ala13GlyfsTer?	frameshift_variant	2/2	2

Frequencies

GnomAD3 genomes Cov.: 31

GnomAD4 exome Cov.: 12

GnomAD4 genome Cov.: 31

ClinVar

Significance: Pathogenic

Submissions summary: Pathogenic:1

Revision: criteria provided, single submitter

Submissions by phenotype

not provided Pathogenic:1

Pathogenic, criteria provided, single submitter

clinical testing

GeneDx

Jun 07, 2018

The c.38delC variant in the PURA gene has not been reported previously as a pathogenic variant nor as a benign variant, to our knowledge. The c.38delC variant causes a frameshift starting with codon Alanine 13, changes this amino acid to a Glycine residue, and creates a premature Stop codon at position 65 of the new reading frame, denoted p.Ala13GlyfsX65. This variant is predicted to cause loss of normal protein function through protein truncation. The c.38delC variant is not observed in large population cohorts (Lek et al., 2016). We interpret c.38delC as a pathogenic variant. -

Computational scores

Source: dbNSFP v4.3

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

Other links and lift over

dbSNP: rs1581036001; hg19: chr5-139493803;