NM_004484.4:c.955G>T

Variant names:

• chrX-133753559-C-A
• NM_004484.4:c.955G>T

Variant summary

Our verdict is Uncertain significance. Variant got 2 ACMG points: 2P and 0B. PM2

The NM_004484.4(GPC3):​c.955G>T​(p.Val319Leu) variant causes a missense change involving the alteration of a non-conserved nucleotide. The variant allele was found at a frequency of 0.000000913 in 1,095,482 control chromosomes in the GnomAD database, with no homozygous occurrence. There are no hemizygote samples in GnomAD. No clinical diagnostic laboratories have submitted clinical-significance assessments for this variant to ClinVar.

• Frequency:
  • Genomes: not found (cov: 23)
  • Exomes 𝑓: 9.1e-7 (0 hom. 0 hem.)
• Consequence: GPC3 NM_004484.4 missense
• Clinical Significance: Not reported in ClinVar
• Conservation: PhyloP100: 3.15

Genes affected

GPC3 (HGNC:4451): (glypican 3) Cell surface heparan sulfate proteoglycans are composed of a membrane-associated protein core substituted with a variable number of heparan sulfate chains. Members of the glypican-related integral membrane proteoglycan family (GRIPS) contain a core protein anchored to the cytoplasmic membrane via a glycosyl phosphatidylinositol linkage. These proteins may play a role in the control of cell division and growth regulation. The protein encoded by this gene can bind to and inhibit the dipeptidyl peptidase activity of CD26, and it can induce apoptosis in certain cell types. Deletion mutations in this gene are associated with Simpson-Golabi-Behmel syndrome, also known as Simpson dysmorphia syndrome. Alternative splicing results in multiple transcript variants. [provided by RefSeq, Sep 2009]

ACMG classification

Verdict is Uncertain_significance. Variant got 2 ACMG points.

• PM2: Very rare variant in population databases, with high coverage

Transcripts

RefSeq

Gene	Transcript	HGVSc	HGVSp	Effect	Exon rank	MANE	Protein	UniProt
GPC3	NM_004484.4	c.955G>T	p.Val319Leu	missense_variant	Exon 3 of 8	ENST00000370818.8	NP_004475.1

Ensembl

Gene	Transcript	HGVSc	HGVSp	Effect	Exon rank	TSL	MANE	Protein	Appris	UniProt
GPC3	ENST00000370818.8	c.955G>T	p.Val319Leu	missense_variant	Exon 3 of 8	1	NM_004484.4	ENSP00000359854.3

Frequencies

GnomAD3 genomes Cov.: 23

GnomAD4 exome AF: 9.13e-7 AC: 1 AN: 1095482 Hom.: 0 Cov.: 31 AF XY: 0.00 AC XY: 0 AN XY: 360886

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: 0.00000119

Gnomad4 OTH exome AF: 0.00

GnomAD4 genome Cov.: 23

ClinVar

Not reported in ClinVar

Computational scores

Source: dbNSFP v4.3

Name	Calibrated prediction	Score	Prediction
AlphaMissense	Pathogenic	0.92
BayesDel_addAF	Benign	-0.010	T
BayesDel_noAF	Benign	-0.25
CADD	Benign	15
DANN	Uncertain	0.97
DEOGEN2	Uncertain	0.52	D;.;.
FATHMM_MKL	Pathogenic	0.99	D
LIST_S2	Uncertain	0.89	D;D;D
M_CAP	Benign	0.040	D
MetaRNN	Uncertain	0.54	D;D;D
MetaSVM	Benign	-0.84	T
MutationAssessor	Uncertain	2.3	M;M;.
PrimateAI	Uncertain	0.50	T
PROVEAN	Uncertain	-2.5	N;N;.
REVEL	Uncertain	0.30
Sift	Uncertain	0.023	D;D;.
Sift4G	Pathogenic	0.0	D;D;D
Polyphen		0.057	B;.;.
Vest4		0.57
MutPred		0.54		Loss of catalytic residue at V319 (P = 0.2111);Loss of catalytic residue at V319 (P = 0.2111);.;
MVP		0.60
MPC		0.20
ClinPred		0.75	D
GERP RS		2.7
RBP_binding_hub_radar		0.0
RBP_regulation_power_radar		1.0
Varity_R		0.33
gMVP		0.80

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

No publications associated with this variant yet.

Other links and lift over

hg19: chrX-132887586; COSMIC: COSV63669721;