rs138702206

Variant names:

Your query was ambiguous. Multiple possible variants found:

Variant summary

Our verdict is Benign. The variant received -18 ACMG points: 2P and 20B. PM1BP4_StrongBP6_Very_StrongBS1BS2

The NM_000270.4(PNP):c.649G>A(p.Val217Ile) variant causes a missense change involving the alteration of a conserved nucleotide. The variant allele was found at a frequency of 0.000988 in 1,611,114 control chromosomes in the GnomAD database, including 17 homozygotes. In-silico tool predicts a benign outcome for this variant. Variant has been reported in ClinVar as Benign (★★). Synonymous variant affecting the same amino acid position (i.e. V217V) has been classified as Uncertain significance.

Frequency

Genomes: 𝑓 0.0056 ( 7 hom., cov: 32)

Exomes 𝑓: 0.00051 ( 10 hom. )

Consequence

PNP
NM_000270.4 missense

Scores

Clinical Significance

Benign criteria provided, multiple submitters, no conflicts B:8

Conservation

PhyloP100: 9.74

Publications

5 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: STRONG, SUPPORTIVE Submitted by: Labcorp Genetics (formerly Invitae), Orphanet

PNP links:

ENSG00000258908 (HGNC:):

ENSG00000258908 links:

Genome browser will be placed here

ACMG classification

Classification was made for transcript

Our verdict: Benign. The variant received -18 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

BP4

Computational evidence support a benign effect (MetaRNN=0.017632246).

BP6

Variant 14-20475249-G-A is Benign according to our data. Variant chr14-20475249-G-A is described in ClinVar as Benign. ClinVar VariationId is 446024.Status of the report is criteria_provided_multiple_submitters_no_conflicts, 2 stars.

BS1

Variant frequency is greater than expected in population afr. GnomAd4 allele frequency = 0.00556 (847/152272) while in subpopulation AFR AF = 0.019 (788/41550). AF 95% confidence interval is 0.0179. There are 7 homozygotes in GnomAd4. There are 395 alleles in the male GnomAd4 subpopulation. Median coverage is 32. This position passed quality control check.

BS2

High Homozygotes in GnomAd4 at 7 AR gene

Transcripts

RefSeq

Gene	Transcript	HGVSc	HGVSp	Effect	Exon rank	MANE	Protein	UniProt
PNP	NM_000270.4 link	c.649G>A	p.Val217Ile	missense_variant	Exon 5 of 6	ENST00000361505.10	NP_000261.2	P00491V9HWH6

Ensembl

Gene	Transcript	HGVSc	HGVSp	Effect	Exon rank	TSL	MANE	Protein	Appris	UniProt
PNP	ENST00000361505.10 link	c.649G>A	p.Val217Ile	missense_variant	Exon 5 of 6	1	NM_000270.4	ENSP00000354532.6		P00491

Frequencies

GnomAD3 genomes

AF:

0.00557

AC:

847

AN:

152154

Hom.:

Cov.:

show subpopulations

Gnomad AFR

AF:

0.0190

Gnomad AMI

AF:

0.00

Gnomad AMR

AF:

0.00288

Gnomad ASJ

AF:

0.00

Gnomad EAS

AF:

0.00

Gnomad SAS

AF:

0.000207

Gnomad FIN

AF:

0.00

Gnomad MID

AF:

0.00

Gnomad NFE

AF:

0.000103

Gnomad OTH

AF:

0.00382

GnomAD2 exomes

AF:

0.00150

AC:

377

AN:

250594

AF XY:

0.00111

show subpopulations

Gnomad AFR exome

AF:

0.0202

Gnomad AMR exome

AF:

0.00101

Gnomad ASJ exome

AF:

0.00

Gnomad EAS exome

AF:

0.00

Gnomad FIN exome

AF:

0.00

Gnomad NFE exome

AF:

0.0000881

Gnomad OTH exome

AF:

0.000490

GnomAD4 exome

AF:

0.000510

AC:

744

AN:

1458842

Hom.:

Cov.:

AF XY:

0.000457

AC XY:

331

AN XY:

725074

show subpopulations

African (AFR)

AF:

0.0171

AC:

573

AN:

33432

American (AMR)

AF:

0.00130

AC:

AN:

44654

Ashkenazi Jewish (ASJ)

AF:

0.00

AC:

AN:

26068

East Asian (EAS)

AF:

0.00

AC:

AN:

39636

South Asian (SAS)

AF:

0.0000464

AC:

AN:

86218

European-Finnish (FIN)

AF:

0.00

AC:

AN:

53110

Middle Eastern (MID)

AF:

0.000870

AC:

AN:

5750

European-Non Finnish (NFE)

AF:

0.0000306

AC:

AN:

1109690

Other (OTH)

AF:

0.00116

AC:

AN:

60284

Allele Balance Distribution

Red line indicates average allele balance

Average allele balance: 0.489

Heterozygous variant carriers

128

170

213

0.00

0.20

0.40

0.60

0.80

0.95

Allele balance

Age Distribution

Exome Het

Exome Hom

Variant carriers

100

<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:

0.00556

AC:

847

AN:

152272

Hom.:

Cov.:

AF XY:

0.00531

AC XY:

395

AN XY:

74448

show subpopulations

African (AFR)

AF:

0.0190

AC:

788

AN:

41550

American (AMR)

AF:

0.00288

AC:

AN:

15298

Ashkenazi Jewish (ASJ)

AF:

0.00

AC:

AN:

3470

East Asian (EAS)

AF:

0.00

AC:

AN:

5184

South Asian (SAS)

AF:

0.00

AC:

AN:

4824

European-Finnish (FIN)

AF:

0.00

AC:

AN:

10610

Middle Eastern (MID)

AF:

0.00

AC:

AN:

294

European-Non Finnish (NFE)

AF:

0.000103

AC:

AN:

68016

Other (OTH)

AF:

0.00378

AC:

AN:

2114

Allele Balance Distribution

Red line indicates average allele balance

Average allele balance: 0.492

Heterozygous variant carriers

115

153

191

0.00

0.20

0.40

0.60

0.80

0.95

Allele balance

Age Distribution

Genome Het

Genome Hom

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:

0.00360

Hom.:

Bravo

AF:

0.00646

ESP6500AA

AF:

0.0193

AC:

ESP6500EA

AF:

0.000116

AC:

ExAC

AF:

0.00187

AC:

227

Asia WGS

AF:

0.000866

AC:

AN:

3478

EpiCase

AF:

0.0000545

EpiControl

AF:

0.000119

ClinVar

Significance: Benign

Submissions summary: Benign:8

Revision: criteria provided, multiple submitters, no conflicts

LINK: link

Submissions by phenotype

Purine-nucleoside phosphorylase deficiency

Benign:3

Aug 24, 2023

ARUP Laboratories, Molecular Genetics and Genomics, ARUP Laboratories

Significance:Benign

Review Status:criteria provided, single submitter

Collection Method:clinical testing

- -

Oct 13, 2017

Illumina Laboratory Services, Illumina

Significance:Benign

Review Status:criteria provided, single submitter

Collection Method:clinical testing

This variant was observed as part of a predisposition screen in an ostensibly healthy population. A literature search was performed for the gene, cDNA change, and amino acid change (where applicable). Publications were found based on this search. The evidence from the literature, in combination with allele frequency data from public databases where available, was sufficient to rule this variant out of causing disease. Therefore, this variant is classified as benign. -

Jan 16, 2025

Labcorp Genetics (formerly Invitae), Labcorp

Significance:Benign

Review Status:criteria provided, single submitter

Collection Method:clinical testing

- -

not provided

Benign:3

Breakthrough Genomics, Breakthrough Genomics

Significance:Benign

Review Status:criteria provided, single submitter

Collection Method:not provided

- -

Feb 27, 2017

Center for Pediatric Genomic Medicine, Children's Mercy Hospital and Clinics

Significance:Benign

Review Status:criteria provided, single submitter

Collection Method:clinical testing

- -

Mar 03, 2015

GeneDx

Significance:Benign

Review Status:criteria provided, single submitter

Collection Method:clinical testing

- -

not specified

Benign:2

Clinical Genetics, Academic Medical Center

Significance:Benign

Review Status:no assertion criteria provided

Collection Method:clinical testing

- -

Clinical Genetics DNA and cytogenetics Diagnostics Lab, Erasmus MC, Erasmus Medical Center

Significance:Benign

Review Status:no assertion criteria provided

Collection Method:clinical testing

- -

Computational scores

Source: dbNSFP v4.3

Name

Calibrated prediction

Score

Prediction

AlphaMissense

Benign

0.19

BayesDel_addAF

Benign

-0.28

BayesDel_noAF

Benign

-0.16

CADD

Uncertain

(source)

DANN

Uncertain

0.99

DEOGEN2

Benign

0.36

Eigen

Benign

0.18

Eigen_PC

Uncertain

0.32

FATHMM_MKL

Uncertain

0.97

LIST_S2

Uncertain

0.92

MetaRNN

Benign

0.018

MetaSVM

Uncertain

-0.0074

MutationAssessor

Uncertain

2.7

PhyloP100

9.7

PrimateAI

Uncertain

0.62

PROVEAN

Benign

-0.79

REVEL

Uncertain

0.46

Sift

Benign

0.066

Sift4G

Uncertain

0.048

Polyphen

0.019

Vest4

0.46

MVP

0.81

MPC

0.31

ClinPred

0.050

GERP RS

5.0

RBP_binding_hub_radar

0.0

RBP_regulation_power_radar

1.7

Varity_R

0.52

gMVP

0.66

Mutation Taster

=93/7

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

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Variant summary

Frequency

Consequence

Scores

Clinical Significance

Conservation

Publications

ACMG classification

Transcripts

RefSeq

Ensembl

Frequencies

Age Distribution

Age Distribution

ClinVar

Submissions by phenotype

Computational scores

Splicing

Publications

Other links and lift over