Genetic Variant GPC2:p.Gly554Trp (chr7-100170310-C-A) – ACMG Classification: Uncertain_significance (2 pts)

Variant summary

Our verdict is Uncertain significance. Variant got 2 ACMG points: 4P and 2B. PM1PM2BP4_Moderate

The NM_152742.3(GPC2):c.1660G>T(p.Gly554Trp) variant causes a missense change involving the alteration of a non-conserved nucleotide. The variant allele was found at a frequency of 0.0000335 in 1,609,570 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. No clinical diagnostic laboratories have submitted clinical-significance assessments for this variant to ClinVar. Another variant affecting the same amino acid position, but resulting in a different missense (i.e. G554R) has been classified as Uncertain significance.

Frequency

Genomes: 𝑓 0.000046 ( 0 hom., cov: 31)

Exomes 𝑓: 0.000032 ( 0 hom. )

Consequence

GPC2
NM_152742.3 missense

Scores

Clinical Significance

Not reported in ClinVar

Conservation

PhyloP100: -0.0520

Variant links:

Genes affected

GPC2 (HGNC:4450): (glypican 2) Predicted to be involved in several processes, including positive regulation of neuron projection development; regulation of protein localization to membrane; and smoothened signaling pathway. Located in endoplasmic reticulum. [provided by Alliance of Genome Resources, Apr 2022]

GPC2 links:

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ACMG classification

Classification made for transcript

Verdict is Uncertain_significance. Variant got 2 ACMG points.

PM1

In a lipid_moiety_binding_region GPI-anchor amidated glycine (size 0) in uniprot entity GPC2_HUMAN

PM2

Very rare variant in population databases, with high coverage;

BP4

Computational evidence support a benign effect (MetaRNN=0.16981637).

Transcripts

RefSeq

Gene	Transcript	HGVSc	HGVSp	Effect	Exon rank	MANE	Protein	UniProt
GPC2	NM_152742.3 link	c.1660G>T	p.Gly554Trp	missense_variant	Exon 10 of 10	ENST00000292377.4	NP_689955.1	Q8N158

Ensembl

Gene	Transcript	HGVSc	HGVSp	Effect	Exon rank	TSL	MANE	Protein	Appris	UniProt
GPC2	ENST00000292377.4 link	c.1660G>T	p.Gly554Trp	missense_variant	Exon 10 of 10	1	NM_152742.3	ENSP00000292377.2		Q8N158

Frequencies

GnomAD3 genomes

AF:

0.0000460

AC:

AN:

152140

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:

0.000193

Gnomad SAS

AF:

0.00

Gnomad FIN

AF:

0.0000942

Gnomad MID

AF:

0.00

Gnomad NFE

AF:

0.0000735

Gnomad OTH

AF:

0.00

GnomAD3 exomes

AF:

0.0000330

AC:

AN:

242762

Hom.:

AF XY:

0.0000304

AC XY:

AN XY:

131414

show subpopulations

Gnomad AFR exome

AF:

0.00

Gnomad AMR exome

AF:

0.0000294

Gnomad ASJ exome

AF:

0.000102

Gnomad EAS exome

AF:

0.0000558

Gnomad SAS exome

AF:

0.0000341

Gnomad FIN exome

AF:

0.0000475

Gnomad NFE exome

AF:

0.0000274

Gnomad OTH exome

AF:

0.00

GnomAD4 exome

AF:

0.0000322

AC:

AN:

1457430

Hom.:

Cov.:

AF XY:

0.0000414

AC XY:

AN XY:

724622

show subpopulations

Gnomad4 AFR exome

AF:

0.00

Gnomad4 AMR exome

AF:

0.0000450

Gnomad4 ASJ exome

AF:

0.0000384

Gnomad4 EAS exome

AF:

0.0000254

Gnomad4 SAS exome

AF:

0.0000470

Gnomad4 FIN exome

AF:

0.0000188

Gnomad4 NFE exome

AF:

0.0000333

Gnomad4 OTH exome

AF:

0.00

GnomAD4 genome

AF:

0.0000460

AC:

AN:

152140

Hom.:

Cov.:

AF XY:

0.0000404

AC XY:

AN XY:

74318

show subpopulations

Gnomad4 AFR

AF:

0.00

Gnomad4 AMR

AF:

0.00

Gnomad4 ASJ

AF:

0.00

Gnomad4 EAS

AF:

0.000193

Gnomad4 SAS

AF:

0.00

Gnomad4 FIN

AF:

0.0000942

Gnomad4 NFE

AF:

0.0000735

Gnomad4 OTH

AF:

0.00

Alfa

AF:

0.0000540

Hom.:

ExAC

AF:

0.0000577

AC:

ClinVar

Not reported in ClinVar

Computational scores

Source: dbNSFP v4.3

Name

Calibrated prediction

Score

Prediction

AlphaMissense

Benign

0.14

BayesDel_addAF

Benign

-0.31

BayesDel_noAF

Benign

-0.51

CADD

Benign

DANN

Uncertain

0.99

DEOGEN2

Benign

0.15

Eigen

Benign

-0.27

Eigen_PC

Benign

-0.29

FATHMM_MKL

Benign

0.37

LIST_S2

Benign

0.48

M_CAP

Benign

0.018

MetaRNN

Benign

0.17

MetaSVM

Benign

-0.96

MutationAssessor

Uncertain

2.1

PrimateAI

Benign

0.32

PROVEAN

Benign

-2.3

REVEL

Benign

0.098

Sift

Benign

0.035

Sift4G

Uncertain

0.019

Polyphen

0.99

Vest4

0.34

MutPred

0.45

Loss of disorder (P = 0.0084);

MVP

0.12

MPC

0.13

ClinPred

0.28

GERP RS

0.24

Varity_R

0.12

gMVP

0.38

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

Computational scores

Splicing

Publications

LitVar

Other links and lift over