5-140114182-A-G

Variant names:

• chr5-140114182-A-G
• rs793888530
• NM_005859.5:c.1A>G

Variant summary

Our verdict is Pathogenic. Variant got 14 ACMG points: 14P and 0B. PVS1_Strong PM2 PP5_Very_Strong

The NM_005859.5(PURA):​c.1A>G​(p.Met1?) variant causes a start lost 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 Likely pathogenic (★★).

• Frequency:
  • Genomes: not found (cov: 31)
  • Exomes 𝑓: 0.0 (0 hom.)
  • Failed GnomAD Quality Control
• Consequence: PURA NM_005859.5 start_lost
• Clinical Significance: Pathogenic/Likely pathogenic criteria provided, multiple submitters, no conflicts P:4
• Conservation: PhyloP100: 1.78

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 14 ACMG points.

• PVS1: Start lost variant, next in-frame start position is after 6 pathogenic variants. Next in-frame start position is after 104 codons. Genomic position: 140114491. Lost 0.320 part of the original CDS.
• PM2: Very rare variant in population databases, with high coverage
• PP5: Variant 5-140114182-A-G is Pathogenic according to our data. Variant chr5-140114182-A-G is described in ClinVar as [Likely_pathogenic]. Clinvar id is 489294.Status of the report is criteria_provided_multiple_submitters_no_conflicts, 2 stars.

Transcripts

RefSeq

Gene	Transcript	HGVSc	HGVSp	Effect	Exon rank	MANE	Protein	UniProt
PURA	NM_005859.5	c.1A>G	p.Met1?	start_lost	Exon 1 of 1	ENST00000331327.5	NP_005850.1

Ensembl

Gene	Transcript	HGVSc	HGVSp	Effect	Exon rank	TSL	MANE	Protein	Appris	UniProt
PURA	ENST00000331327.5	c.1A>G	p.Met1?	start_lost	Exon 1 of 1	6	NM_005859.5	ENSP00000332706.3
PURA	ENST00000651386.1	c.1A>G	p.Met1?	start_lost	Exon 2 of 2			ENSP00000499133.1
PURA	ENST00000505703.2	c.1A>G	p.Met1?	start_lost	Exon 2 of 2	3		ENSP00000498560.1
PURA	ENST00000502351.1	c.1A>G	p.Met1?	start_lost	Exon 2 of 2	2		ENSP00000498760.1

Frequencies

GnomAD3 genomes Cov.: 31

GnomAD4 exome Data not reliable, filtered out with message: AC0 AF: 0.00 AC: 0 AN: 599624 Hom.: 0 Cov.: 8 AF XY: 0.00 AC XY: 0 AN XY: 292570

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/Likely pathogenic

Submissions summary: Pathogenic:4

Revision: criteria provided, multiple submitters, no conflicts

Submissions by phenotype

PURA-related severe neonatal hypotonia-seizures-encephalopathy syndrome Pathogenic:3

Feb 23, 2024

Labcorp Genetics (formerly Invitae), Labcorp

Significance: Pathogenic

Review Status: criteria provided, single submitter

Collection Method: clinical testing

This sequence change affects the initiator methionine of the PURA mRNA. The next in-frame methionine is located at codon 104. This variant is not present in population databases (gnomAD no frequency). Disruption of the initiator codon has been observed in individual(s) with clinical features of PURA syndrome (PMID: 27148565, 32337850). In at least one individual the variant was observed to be de novo. ClinVar contains an entry for this variant (Variation ID: 489294). For these reasons, this variant has been classified as Pathogenic. -

Aug 22, 2019

Revvity Omics, Revvity

Significance: Pathogenic

Review Status: criteria provided, single submitter

Collection Method: clinical testing

- -

Dec 06, 2021

MGZ Medical Genetics Center

Significance: Likely pathogenic

Review Status: criteria provided, single submitter

Collection Method: clinical testing

- -

not provided Pathogenic:1

Dec 26, 2017

GeneDx

Significance: Pathogenic

Review Status: criteria provided, single submitter

Collection Method: clinical testing

The c.1 A>G variant in the PURA gene has not been reported previously as a pathogenic variant nor as a benign variant, to our knowledge. As this pathogenic variant changes the translation initiator Methionine codon, the resultant protein is described as p.Met1?, using a question mark to signify that it is not known if the loss of Met1 means that all protein translation is completely prevented or if an abnormal protein is produced using an alternate Methionine. The c.1 A>G variant is not observed in large population cohorts (Lek et al., 2016). We interpret c.1 A>G as a pathogenic variant. -

Computational scores

Source: dbNSFP v4.3

Name	Calibrated prediction	Score	Prediction
BayesDel_addAF	Pathogenic	0.22	D
BayesDel_noAF	Uncertain	0.080
CADD	Uncertain	24
DANN	Uncertain	0.98
DEOGEN2	Benign	0.38	T
Eigen	Benign	-0.22
Eigen_PC	Benign	-0.15
FATHMM_MKL	Benign	0.17	N
LIST_S2	Uncertain	0.90	D
M_CAP	Pathogenic	0.90	D
MetaRNN	Pathogenic	0.98	D
MetaSVM	Benign	-0.98	T
PROVEAN	Benign	-0.78	N
REVEL	Benign	0.27
Sift	Pathogenic	0.0	D
Sift4G	Uncertain	0.052	T
Polyphen		0.14	B
Vest4		0.61
MutPred		0.98		Loss of glycosylation at S6 (P = 0.2417);
MVP		0.82
ClinPred		0.99	D
GERP RS		3.2
RBP_binding_hub_radar		0.0
RBP_regulation_power_radar		1.9
Varity_R		0.81
gMVP		0.44

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: rs793888530; hg19: chr5-139493767;