Variant 1-176556773-C-A details in Genebe, Genetics Data Aggregator

Variant summary

Our verdict is Likely benign. Variant got -2 ACMG points: 2P and 4B. PM2BP4_Strong

The NM_020318.3(PAPPA2):c.451C>A(p.Gln151Lys) variant causes a missense change involving the alteration of a non-conserved nucleotide. The variant allele was found at a frequency of 0.00000684 in 1,461,880 control chromosomes in the GnomAD database, with no homozygous occurrence. In-silico tool predicts a benign outcome for this variant. 15/21 in silico tools predict a benign outcome for this variant. Variant has been reported in ClinVar as Uncertain significance (★).

Frequency

Genomes: not found (cov: 32)

Exomes 𝑓: 0.0000068 ( 0 hom. )

Consequence

PAPPA2
NM_020318.3 missense

Scores

Clinical Significance

Uncertain significance criteria provided, single submitter U:1

Conservation

PhyloP100: -0.441

Variant links:

Genes affected

PAPPA2 (HGNC:14615): (pappalysin 2) This gene encodes a member of the pappalysin family of metzincin metalloproteinases. The encoded protein cleaves insulin-like growth factor-binding protein 5 and is thought to be a local regulator of insulin-like growth factor (IGF) bioavailability. Alternative splicing results in multiple transcript variants. [provided by RefSeq, Jul 2010]

PAPPA2 links:

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ACMG classification

Classification made for transcript

Verdict is Likely_benign. Variant got -2 ACMG points.

PM2

Very rare variant in population databases, with high coverage;

BP4

Computational evidence support a benign effect (MetaRNN=0.060449004).

Transcripts

RefSeq

Gene	Transcript	HGVSc	HGVSp	Effect	#exon/exons	MANE	Protein	UniProt
PAPPA2	NM_020318.3 linkuse as main transcript	c.451C>A	p.Gln151Lys	missense_variant	2/23	ENST00000367662.5	NP_064714.2

Ensembl

Gene	Transcript	HGVSc	HGVSp	Effect	#exon/exons	TSL	MANE	Protein	Appris	UniProt
PAPPA2	ENST00000367662.5 linkuse as main transcript	c.451C>A	p.Gln151Lys	missense_variant	2/23	1	NM_020318.3	ENSP00000356634	P1	Q9BXP8-1
PAPPA2	ENST00000367661.7 linkuse as main transcript	c.451C>A	p.Gln151Lys	missense_variant	2/5	1		ENSP00000356633		Q9BXP8-2

Frequencies

GnomAD3 genomes

Cov.:

GnomAD4 exome

AF:

0.00000684

AC:

AN:

1461880

Hom.:

Cov.:

AF XY:

0.00000825

AC XY:

AN XY:

727242

show subpopulations

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:

0.00000899

Gnomad4 OTH exome

AF:

0.00

GnomAD4 genome

Cov.:

Bravo

AF:

0.00000378

EpiCase

AF:

0.0000545

EpiControl

AF:

0.00

ClinVar

Significance: Uncertain significance

Submissions summary: Uncertain:1

Revision: criteria provided, single submitter

LINK: link

Submissions by phenotype

Inborn genetic diseases

Uncertain:1

Uncertain significance, criteria provided, single submitter

clinical testing

Ambry Genetics

Dec 14, 2022

The c.451C>A (p.Q151K) alteration is located in exon 2 (coding exon 1) of the PAPPA2 gene. This alteration results from a C to A substitution at nucleotide position 451, causing the glutamine (Q) at amino acid position 151 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

0.069

BayesDel_addAF

Benign

-0.35

BayesDel_noAF

Benign

-0.73

CADD

Benign

0.22

DANN

Benign

0.21

DEOGEN2

Benign

0.055

.;T

Eigen

Benign

-1.4

Eigen_PC

Benign

-1.5

FATHMM_MKL

Benign

0.020

LIST_S2

Benign

0.50

T;T

M_CAP

Benign

0.0045

MetaRNN

Benign

0.060

T;T

MetaSVM

Benign

-0.95

MutationAssessor

Benign

0.69

N;N

MutationTaster

Benign

1.0

N;N

PrimateAI

Benign

0.19

PROVEAN

Benign

-0.52

N;N

REVEL

Benign

0.032

Sift

Benign

1.0

T;T

Sift4G

Benign

1.0

T;T

Polyphen

0.020

.;B

Vest4

0.042

MutPred

0.25

Gain of ubiquitination at Q151 (P = 0.0121);Gain of ubiquitination at Q151 (P = 0.0121);

MVP

0.20

MPC

0.22

ClinPred

0.046

GERP RS

-4.9

Varity_R

0.041

gMVP

0.24

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

Below is the list of publications found by LitVar. It may be empty.

Variant summary

Frequency

Consequence

Scores

Clinical Significance

Conservation

ACMG classification

Transcripts

RefSeq

Ensembl

Frequencies

ClinVar

Submissions by phenotype

Computational scores

Splicing

Publications

LitVar

Other links and lift over