Genetic Variant PAPPA:p.Arg73Ser (chr9-116154389-C-A) – ACMG Classification: Likely_benign (-6 pts)

Variant summary

Our verdict is Likely benign. Variant got -6 ACMG points: 0P and 6B. BP4_ModerateBS2

The NM_002581.5(PAPPA):c.217C>A(p.Arg73Ser) variant causes a missense change involving the alteration of a non-conserved nucleotide. The variant allele was found at a frequency of 0.00001 in 1,100,418 control chromosomes in the GnomAD database, with no homozygous occurrence. In-silico tool predicts a benign outcome for this variant. 13/21 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: 0.0000084 ( 0 hom. )

Consequence

PAPPA
NM_002581.5 missense

Scores

Clinical Significance

Uncertain significance criteria provided, single submitter U:1

Conservation

PhyloP100: 3.27

Variant links:

Genes affected

PAPPA (HGNC:8602): (pappalysin 1) This gene encodes a secreted metalloproteinase which cleaves insulin-like growth factor binding proteins (IGFBPs). Following IGFBP cleavage, insulin growth factors dissociate from IGFBPs and bind to IGF receptors, resulting in activation of the IGF pathway. The encoded protein plays a role in bone formation, inflammation, wound healing and female fertility. Enhanced expression of this protein is associated with diabetic nephropathy in human patients and this protein may promote tumor invasion and growth in various human cancers. [provided by RefSeq, Aug 2017]

PAPPA links:

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ACMG classification

Classification made for transcript

Verdict is Likely_benign. Variant got -6 ACMG points.

BP4

Computational evidence support a benign effect (MetaRNN=0.12810081).

BS2

High AC in GnomAdExome4 at 8 AD gene.

Transcripts

RefSeq

Gene	Transcript	HGVSc	HGVSp	Effect	Exon rank	MANE	Protein	UniProt
PAPPA	NM_002581.5 link	c.217C>A	p.Arg73Ser	missense_variant	Exon 1 of 22	ENST00000328252.4	NP_002572.2	Q13219Q7Z613B4DTA8
PAPPA	XM_017014784.3 link	c.217C>A	p.Arg73Ser	missense_variant	Exon 1 of 21		XP_016870273.1

Ensembl

Gene	Transcript	HGVSc	HGVSp	Effect	Exon rank	TSL	MANE	Protein	Appris	UniProt
PAPPA	ENST00000328252.4 link	c.217C>A	p.Arg73Ser	missense_variant	Exon 1 of 22	1	NM_002581.5	ENSP00000330658.3		Q13219

Frequencies

GnomAD3 genomes

AF:

0.0000202

AC:

AN:

148466

Hom.:

Cov.:

show subpopulations

Gnomad AFR

AF:

0.00

Gnomad AMI

AF:

0.00

Gnomad AMR

AF:

0.00

Gnomad ASJ

AF:

0.00

Gnomad EAS

AF:

0.000598

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

GnomAD4 exome

AF:

0.00000840

AC:

AN:

951952

Hom.:

Cov.:

AF XY:

0.00000437

AC XY:

AN XY:

457504

show subpopulations

Gnomad4 AFR exome

AF:

0.00

Gnomad4 AMR exome

AF:

0.00

Gnomad4 ASJ exome

AF:

0.00

Gnomad4 EAS exome

AF:

0.000330

Gnomad4 SAS exome

AF:

0.00

Gnomad4 FIN exome

AF:

0.00

Gnomad4 NFE exome

AF:

0.00

Gnomad4 OTH exome

AF:

0.00

GnomAD4 genome

AF:

0.0000202

AC:

AN:

148466

Hom.:

Cov.:

AF XY:

0.0000276

AC XY:

AN XY:

72366

show subpopulations

Gnomad4 AFR

AF:

0.00

Gnomad4 AMR

AF:

0.00

Gnomad4 ASJ

AF:

0.00

Gnomad4 EAS

AF:

0.000598

Gnomad4 SAS

AF:

0.00

Gnomad4 FIN

AF:

0.00

Gnomad4 NFE

AF:

0.00

Gnomad4 OTH

AF:

0.00

Bravo

AF:

0.0000416

ClinVar

Significance: Uncertain significance

Submissions summary: Uncertain:1

Revision: criteria provided, single submitter

LINK: link

Submissions by phenotype

not specified

Uncertain:1

Mar 20, 2024

Ambry Genetics

Significance: Uncertain significance

Review Status: criteria provided, single submitter

Collection Method: clinical testing

The c.217C>A (p.R73S) alteration is located in exon 1 (coding exon 1) of the PAPPA gene. This alteration results from a C to A substitution at nucleotide position 217, causing the arginine (R) at amino acid position 73 to be replaced by a serine (S). 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

0.30

BayesDel_addAF

Benign

-0.23

BayesDel_noAF

Benign

-0.57

CADD

Benign

DANN

Benign

0.97

DEOGEN2

Benign

0.18

Eigen

Benign

-0.26

Eigen_PC

Benign

-0.20

FATHMM_MKL

Benign

0.70

LIST_S2

Benign

0.55

M_CAP

Uncertain

0.19

MetaRNN

Benign

0.13

MetaSVM

Benign

-0.69

MutationAssessor

Benign

0.0

PrimateAI

Pathogenic

0.90

PROVEAN

Benign

-0.62

REVEL

Benign

0.019

Sift

Benign

0.18

Sift4G

Benign

0.19

Polyphen

0.39

Vest4

0.067

MVP

0.068

MPC

0.40

ClinPred

0.39

GERP RS

2.5

Varity_R

0.17

gMVP

0.52

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