Genetic Variant PNP:p.Glu2Gln (chr14-20469528-G-C) – ACMG Classification: Uncertain_significance (2 pts)

Variant summary

Our verdict is Uncertain significance. The variant received 2 ACMG points: 4P and 2B. PM1PM2BP4_Moderate

The NM_000270.4(PNP):c.4G>C(p.Glu2Gln) variant causes a missense change. The variant allele was found at a frequency of 0.00000322 in 1,553,798 control chromosomes in the GnomAD database, with no homozygous occurrence. In-silico tool predicts a benign outcome for this variant. 16/22 in silico tools predict a benign outcome for this variant. Variant has been reported in ClinVar as Uncertain significance (★).

Frequency

Genomes: 𝑓 0.000020 ( 0 hom., cov: 32)

Exomes 𝑓: 0.0000014 ( 0 hom. )

Consequence

PNP
NM_000270.4 missense

Scores

Clinical Significance

Uncertain significance criteria provided, single submitter U:1

Conservation

PhyloP100: 4.09

Publications

0 publications found

Variant links:

Genes affected

PNP (HGNC:7892): (purine nucleoside phosphorylase) This gene encodes an enzyme which reversibly catalyzes the phosphorolysis of purine nucleosides. The enzyme is trimeric, containing three identical subunits. Mutations which result in nucleoside phosphorylase deficiency result in defective T-cell (cell-mediated) immunity but can also affect B-cell immunity and antibody responses. Neurologic disorders may also be apparent in patients with immune defects. A known polymorphism at aa position 51 that does not affect enzyme activity has been described. A pseudogene has been identified on chromosome 2. [provided by RefSeq, Jul 2008]

PNP Gene-Disease associations (from GenCC):

purine nucleoside phosphorylase deficiency
Inheritance: AR Classification: DEFINITIVE, STRONG, SUPPORTIVE Submitted by: Labcorp Genetics (formerly Invitae), ClinGen, Orphanet

PNP links:

Genome browser will be placed here

ACMG classification

Classification was made for transcript

Our verdict: Uncertain_significance. The variant received 2 ACMG points.

PM1

In a chain Purine nucleoside phosphorylase (size 288) in uniprot entity PNPH_HUMAN there are 12 pathogenic changes around while only 3 benign (80%) in NM_000270.4

PM2

Very rare variant in population databases, with high coverage;

BP4

Computational evidence support a benign effect (MetaRNN=0.20584172).

Variant Effect in Transcripts

ACMG analysis was done for transcript: NM_000270.4. You can select a different transcript below to see updated ACMG assignments.

RefSeq Transcripts

Sel.	Gene	Transcript	Tags	HGVSc	HGVSp	Effect	Exon Rank	Protein	UniProt
	PNP	NM_000270.4	MANE Select	c.4G>C	p.Glu2Gln	missense	Exon 1 of 6	NP_000261.2	P00491

Ensembl Transcripts

Gene	Transcript	Tags	HGVSc	HGVSp	Effect	Exon Rank	Protein	UniProt
PNP	ENST00000361505.10	TSL:1 MANE Select	c.4G>C	p.Glu2Gln	missense	Exon 1 of 6	ENSP00000354532.6	P00491
PNP	ENST00000556293.6	TSL:1	n.123G>C		non_coding_transcript_exon	Exon 1 of 3
PNP	ENST00000557229.6	TSL:1	n.123G>C		non_coding_transcript_exon	Exon 1 of 4

Frequencies

GnomAD3 genomes

AF:

0.0000197

AC:

AN:

152138

Hom.:

Cov.:

show subpopulations

Gnomad AFR

AF:

0.0000724

Gnomad AMI

AF:

0.00

Gnomad AMR

AF:

0.00

Gnomad ASJ

AF:

0.00

Gnomad EAS

AF:

0.00

Gnomad SAS

AF:

0.00

Gnomad FIN

AF:

0.00

Gnomad MID

AF:

0.00

Gnomad NFE

AF:

0.00

Gnomad OTH

AF:

0.00

GnomAD2 exomes

AF:

0.0000126

AC:

AN:

158632

AF XY:

0.0000119

show subpopulations

Gnomad AFR exome

AF:

0.000219

Gnomad AMR exome

AF:

0.00

Gnomad ASJ exome

AF:

0.00

Gnomad EAS exome

AF:

0.00

Gnomad FIN exome

AF:

0.00

Gnomad NFE exome

AF:

0.00

Gnomad OTH exome

AF:

0.00

GnomAD4 exome

AF:

0.00000143

AC:

AN:

1401660

Hom.:

Cov.:

AF XY:

0.00000145

AC XY:

AN XY:

691606

show subpopulations

African (AFR)

AF:

0.0000632

AC:

AN:

31632

American (AMR)

AF:

0.00

AC:

AN:

35884

Ashkenazi Jewish (ASJ)

AF:

0.00

AC:

AN:

25212

East Asian (EAS)

AF:

0.00

AC:

AN:

35872

South Asian (SAS)

AF:

0.00

AC:

AN:

79336

European-Finnish (FIN)

AF:

0.00

AC:

AN:

49596

Middle Eastern (MID)

AF:

0.00

AC:

AN:

5044

European-Non Finnish (NFE)

AF:

0.00

AC:

AN:

1080934

Other (OTH)

AF:

0.00

AC:

AN:

58150

Allele Balance Distribution

Red line indicates average allele balance

Average allele balance: 0.475

Heterozygous variant carriers

0.00

0.20

0.40

0.60

0.80

0.95

Allele balance

Age Distribution

Exome Het

Variant carriers

<30

30-35

35-40

40-45

45-50

50-55

55-60

60-65

65-70

70-75

75-80

>80

Age

GnomAD4 genome

AF:

0.0000197

AC:

AN:

152138

Hom.:

Cov.:

AF XY:

0.0000135

AC XY:

AN XY:

74332

show subpopulations

African (AFR)

AF:

0.0000724

AC:

AN:

41426

American (AMR)

AF:

0.00

AC:

AN:

15278

Ashkenazi Jewish (ASJ)

AF:

0.00

AC:

AN:

3468

East Asian (EAS)

AF:

0.00

AC:

AN:

5190

South Asian (SAS)

AF:

0.00

AC:

AN:

4830

European-Finnish (FIN)

AF:

0.00

AC:

AN:

10614

Middle Eastern (MID)

AF:

0.00

AC:

AN:

316

European-Non Finnish (NFE)

AF:

0.00

AC:

AN:

68016

Other (OTH)

AF:

0.00

AC:

AN:

2090

Allele Balance Distribution

Red line indicates average allele balance

Average allele balance: 0.458

Heterozygous variant carriers

0.00

0.20

0.40

0.60

0.80

0.95

Allele balance

Age Distribution

Genome Het

Variant carriers

<30

30-35

35-40

40-45

45-50

50-55

55-60

60-65

65-70

70-75

75-80

>80

Age

Alfa

AF:

0.00

Hom.:

Bravo

AF:

0.0000264

ClinVar

ClinVar submissions

Significance:Uncertain significance

Revision:criteria provided, single submitter

View on ClinVar

Pathogenic

VUS

Benign

Condition

Purine-nucleoside phosphorylase deficiency (1)

Computational scores

Source: dbNSFP v4.9

Name

Calibrated prediction

Score

Prediction

AlphaMissense

Benign

0.11

BayesDel_addAF

Benign

-0.19

BayesDel_noAF

Benign

-0.22

CADD

Benign

(source)

DANN

Benign

0.96

DEOGEN2

Benign

0.016

Eigen

Benign

-0.15

Eigen_PC

Benign

-0.014

FATHMM_MKL

Pathogenic

0.97

LIST_S2

Benign

0.47

M_CAP

Benign

0.082

MetaRNN

Benign

0.21

MetaSVM

Uncertain

-0.081

MutationAssessor

Benign

1.8

PhyloP100

4.1

PrimateAI

Benign

0.47

PROVEAN

Benign

-0.74

REVEL

Benign

0.20

Sift

Benign

0.15

Sift4G

Benign

0.15

Polyphen

0.0020

Vest4

0.22

MutPred

0.14

Loss of helix (P = 0.1299)

MVP

0.89

MPC

0.25

ClinPred

0.33

GERP RS

4.8

PromoterAI

-0.095

Neutral

(source)

RBP_binding_hub_radar

0.97

RBP_regulation_power_radar

2.7

Varity_R

0.26

gMVP

0.71

Mutation Taster

=86/14

polymorphism

(source)

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

You must be logged in to view publications. This limit was set because tens of millions (!) of queries from AI bots are generated daily.

Variant summary

Frequency

Consequence

Scores

Clinical Significance

Conservation

Publications

ACMG classification

Variant Effect in Transcripts

RefSeq Transcripts

Ensembl Transcripts

Frequencies

Age Distribution

Age Distribution

ClinVar

Computational scores

Splicing

Publications

Other links and lift over