chr15-24675976-C-T

Variant names:

Variant summary

Our verdict is Uncertain significance. The variant received 0 ACMG points: 2P and 2B. PM2BP4_Moderate

The NM_018958.3(NPAP1):c.109C>T(p.Arg37Trp) variant causes a missense change involving the alteration of a non-conserved nucleotide. The variant allele was found at a frequency of 0.00000346 in 1,443,150 control chromosomes in the GnomAD database, with no homozygous occurrence. In-silico tool predicts a benign outcome for this variant. Variant has been reported in ClinVar as Uncertain significance (★).

Frequency

Genomes: not found (cov: 33)

Exomes 𝑓: 0.0000035 ( 0 hom. )

Consequence

NPAP1
NM_018958.3 missense

Scores

Clinical Significance

Uncertain significance criteria provided, single submitter U:1

Conservation

PhyloP100: 0.332

Publications

0 publications found

Variant links:

Genes affected

NPAP1 (HGNC:1190): (nuclear pore associated protein 1) This intronless retrogene is located in the Prader-Willi syndrome region on chromosome 15. This gene exhibits tissue-specific imprinting. Expression in adult testis and brain is biallelic, while expression in fetal brain is monoallelic and only from the paternal chromosome. The encoded protein is associated with the nuclear pore complex. [provided by RefSeq, Mar 2021]

NPAP1 links:

ENSG00000286110 (HGNC:):

ENSG00000286110 links:

PWRN1 (HGNC:33235): (Prader-Willi region non-protein coding RNA 1) This gene is located in the Prader-Willi syndrome (PWS) region of chromosome 15, which is known to undergo imprinting. The transcript is believed to be non-coding. It is bi-allelically expressed in testis and kidney, but mono-allelically expressed from the paternal allele in brain. This gene is poly-adenylated and is known to undergo alternative splicing. Transcript variants may represent part of a complex imprinting center-SNURF-SNRPN transcription unit. The contribution of this gene to the PWS phenotype is unknown, but it has been suggested that it may play a role in establishing paternal imprinting in the PWS region, perhaps by maintaining the paternal allele in an open chromatin configuration. [provided by RefSeq, Sep 2009]

PWRN1 links:

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ACMG classification

Classification was made for transcript

Our verdict: Uncertain_significance. The variant received 0 ACMG points.

PM2

Very rare variant in population databases, with high coverage;

BP4

Computational evidence support a benign effect (MetaRNN=0.17372003).

Variant Effect in Transcripts

ACMG analysis was done for transcript: NM_018958.3. 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
	NPAP1	NM_018958.3	MANE Select	c.109C>T	p.Arg37Trp	missense	Exon 1 of 1	NP_061831.2	Q9NZP6

Ensembl Transcripts

Gene	Transcript	Tags	HGVSc	HGVSp	Effect	Exon Rank	Protein	UniProt
NPAP1	ENST00000329468.5	TSL:6 MANE Select	c.109C>T	p.Arg37Trp	missense	Exon 1 of 1	ENSP00000333735.3	Q9NZP6
ENSG00000286110	ENST00000650707.1		n.407+105848C>T		intron	N/A
ENSG00000286110	ENST00000651136.1		n.1530+51871C>T		intron	N/A

Frequencies

GnomAD3 genomes

Cov.:

GnomAD2 exomes

AF:

0.00

AC:

AN:

216376

AF XY:

0.00

Gnomad AFR exome

AF:

0.00

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:

0.00000346

AC:

AN:

1443150

Hom.:

Cov.:

AF XY:

0.00000557

AC XY:

AN XY:

717652

show subpopulations

African (AFR)

AF:

0.00

AC:

AN:

31642

American (AMR)

AF:

0.00

AC:

AN:

42362

Ashkenazi Jewish (ASJ)

AF:

0.00

AC:

AN:

25124

East Asian (EAS)

AF:

0.00

AC:

AN:

38154

South Asian (SAS)

AF:

0.0000118

AC:

AN:

84630

European-Finnish (FIN)

AF:

0.00

AC:

AN:

51640

Middle Eastern (MID)

AF:

0.00

AC:

AN:

5402

European-Non Finnish (NFE)

AF:

0.00000362

AC:

AN:

1104814

Other (OTH)

AF:

0.00

AC:

AN:

59382

Allele Balance Distribution

Red line indicates average allele balance

Average allele balance: 0.485

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

Cov.:

Alfa

AF:

0.00

Hom.:

Bravo

AF:

0.00000378

ClinVar

ClinVar submissions

Significance:Uncertain significance

Revision:criteria provided, single submitter

View on ClinVar

Pathogenic

VUS

Benign

Condition

not specified (1)

Computational scores

Source: dbNSFP v4.9

Name

Calibrated prediction

Score

Prediction

AlphaMissense

Uncertain

0.35

BayesDel_addAF

Benign

-0.19

BayesDel_noAF

Benign

-0.51

CADD

Benign

(source)

DANN

Uncertain

1.0

DEOGEN2

Benign

0.051

Eigen

Benign

-0.40

Eigen_PC

Benign

-0.62

FATHMM_MKL

Benign

0.037

LIST_S2

Benign

0.43

M_CAP

Benign

0.0025

MetaRNN

Benign

0.17

MetaSVM

Benign

-1.0

MutationAssessor

Benign

0.69

PhyloP100

0.33

PrimateAI

Uncertain

0.51

PROVEAN

Uncertain

-4.0

REVEL

Benign

0.048

Sift

Uncertain

0.0010

Sift4G

Uncertain

0.013

Polyphen

1.0

Vest4

0.20

MutPred

0.35

Loss of methylation at R37 (P = 0.0067)

MVP

0.17

MPC

0.33

ClinPred

0.88

GERP RS

1.5

PromoterAI

0.015

Neutral

(source)

Varity_R

0.11

gMVP

0.40

Mutation Taster

=99/1

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

Variant Effect in Transcripts

RefSeq Transcripts

Ensembl Transcripts

Frequencies

Age Distribution

ClinVar

Computational scores

Splicing

Publications

Other links and lift over