8-31032028-C-T

Position:

• chr8-31032028-C-T

Variant summary

Our verdict is Uncertain significance. Variant got 0 ACMG points: 2P and 2B. PM2 BP4_Moderate

The NM_001323311.2(PURG):​c.755G>A​(p.Arg252Lys) variant causes a missense change involving the alteration of a non-conserved nucleotide. The variant was absent in control chromosomes in GnomAD project. In-silico tool predicts a benign outcome for this variant. 14/21 in silico tools predict a benign outcome for this variant. No clinical diagnostic laboratories have submitted clinical-significance assessments for this variant to ClinVar.

• Frequency: Genomes: not found (cov: 32)
• Consequence: PURG NM_001323311.2 missense
• Clinical Significance: Uncertain significance criteria provided, single submitter U:1
• Conservation: PhyloP100: 3.10

Genes affected

PURG (HGNC:17930): (purine rich element binding protein G) The exact function of this gene is not known, however, its encoded product is highly similar to purine-rich element binding protein A. The latter is a DNA-binding protein which binds preferentially to the single strand of the purine-rich element termed PUR, and has been implicated in the control of both DNA replication and transcription. This gene lies in close proximity to the Werner syndrome gene, but on the opposite strand, on chromosome 8p11. [provided by RefSeq, Apr 2016]

ACMG classification

Verdict is Uncertain_significance. Variant got 0 ACMG points.

• PM2: Very rare variant in population databases, with high coverage
• BP4: Computational evidence support a benign effect (MetaRNN=0.1940003).

Transcripts

RefSeq

Gene	Transcript	HGVSc	HGVSp	Effect	#exon/exons	MANE	Protein	UniProt
PURG	NM_001323311.2	c.755G>A	p.Arg252Lys	missense_variant	2/2	ENST00000523392.2	NP_001310240.1
PURG	NM_013357.2	c.755G>A	p.Arg252Lys	missense_variant	1/1		NP_037489.1
PURG	NM_001015508.3	c.755G>A	p.Arg252Lys	missense_variant	1/2		NP_001015508.1
PURG	NM_001323312.2	c.755G>A	p.Arg252Lys	missense_variant	2/3		NP_001310241.1

Ensembl

Gene	Transcript	HGVSc	HGVSp	Effect	#exon/exons	TSL	MANE	Protein	Appris	UniProt
PURG	ENST00000523392.2	c.755G>A	p.Arg252Lys	missense_variant	2/2	3	NM_001323311.2	ENSP00000466881.2
PURG	ENST00000339382.3	c.755G>A	p.Arg252Lys	missense_variant	1/2	1		ENSP00000345168.2
PURG	ENST00000475541.2	c.755G>A	p.Arg252Lys	missense_variant	1/1	6		ENSP00000418721.1

Frequencies

GnomAD3 genomes Cov.: 32

GnomAD4 exome Cov.: 31

GnomAD4 genome Cov.: 32

ClinVar

Significance: Uncertain significance

Submissions summary: Uncertain:1

Revision: criteria provided, single submitter

Submissions by phenotype

not specified Uncertain:1

Uncertain significance, criteria provided, single submitter

clinical testing

Ambry Genetics

Sep 11, 2024

The c.755G>A (p.R252K) alteration is located in exon 1 (coding exon 1) of the PURG gene. This alteration results from a G to A substitution at nucleotide position 755, causing the arginine (R) at amino acid position 252 to be replaced by a lysine (K). Based on insufficient or conflicting evidence, the clinical significance of this alteration remains unclear. -

Computational scores

Source: dbNSFP v4.3

Name	Calibrated prediction	Score	Prediction
AlphaMissense	Benign	0.098
BayesDel_addAF	Benign	-0.14	T
BayesDel_noAF	Benign	-0.45
CADD	Benign	21
DANN	Benign	0.95
DEOGEN2	Benign	0.13	.;T
Eigen	Benign	0.053
Eigen_PC	Benign	0.19
FATHMM_MKL	Uncertain	0.96	D
LIST_S2	Benign	0.84	T;T
M_CAP	Benign	0.0098	T
MetaRNN	Benign	0.19	T;T
MetaSVM	Benign	-1.1	T
MutationAssessor	Benign	1.4	L;L
PrimateAI	Uncertain	0.54	T
PROVEAN	Benign	-0.36	N;N
REVEL	Benign	0.096
Sift	Benign	0.28	T;T
Sift4G	Benign	0.35	T;T
Polyphen		0.57	P;B
Vest4		0.24
MutPred		0.46		Gain of ubiquitination at R252 (P = 0.0029);Gain of ubiquitination at R252 (P = 0.0029);
MVP		0.27
MPC		1.2
ClinPred		0.47	T
GERP RS		5.3
Varity_R		0.18
gMVP		0.70

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: chr8-30889544;