3-157437804-G-T

Position:

• chr3-157437804-G-T

Variant summary

Our verdict is Uncertain significance. Variant got 0 ACMG points: 2P and 2B. PM2 BP4_Moderate

The NM_002852.4(PTX3):​c.422G>T​(p.Arg141Leu) variant causes a missense change involving the alteration of a non-conserved nucleotide. The variant allele was found at a frequency of 0.00000229 in 1,308,830 control chromosomes in the GnomAD database, with no homozygous occurrence. In-silico tool predicts a benign outcome for this variant. 14/21 in silico tools predict a benign outcome for this variant. Variant has been reported in ClinVar as Uncertain significance (★).

• Frequency:
  • Genomes: not found (cov: 31)
  • Exomes 𝑓: 0.0000023 (0 hom.)
• Consequence: PTX3 NM_002852.4 missense
• Clinical Significance: Uncertain significance criteria provided, single submitter U:1
• Conservation: PhyloP100: 0.275

Genes affected

PTX3 (HGNC:9692): (pentraxin 3) This gene encodes a member of the pentraxin protein family. The expression of this protein is induced by inflammatory cytokines in response to inflammatory stimuli in several mesenchymal and epithelial cell types, particularly endothelial cells and mononuclear phagocytes. The protein promotes fibrocyte differentiation and is involved in regulating inflammation and complement activation. It also plays a role in angiogenesis and tissue remodeling. The protein serves as a biomarker for several inflammatory conditions. [provided by RefSeq, Jun 2016]

VEPH1 (HGNC:25735): (ventricular zone expressed PH domain containing 1) Predicted to enable phosphatidylinositol-5-phosphate binding activity. Involved in negative regulation of SMAD protein signal transduction and negative regulation of transforming growth factor beta receptor signaling pathway. Predicted to be active in plasma membrane. [provided by Alliance of Genome Resources, Apr 2022]

ACMG classification

Verdict is Uncertain_significance. Variant got 0 ACMG points.

• PM2: Very rare variant in population databases, with high coverage
• BP4: Computational evidence support a benign effect (MetaRNN=0.074299335).

Transcripts

RefSeq

Gene	Transcript	HGVSc	HGVSp	Effect	#exon/exons	MANE	Protein	UniProt
PTX3	NM_002852.4	c.422G>T	p.Arg141Leu	missense_variant	2/3	ENST00000295927.4	NP_002843.2
VEPH1	NM_001167912.2	c.530-9316C>A		intron_variant		ENST00000362010.7	NP_001161384.1

Ensembl

Gene	Transcript	HGVSc	HGVSp	Effect	#exon/exons	TSL	MANE	Protein	Appris	UniProt
PTX3	ENST00000295927.4	c.422G>T	p.Arg141Leu	missense_variant	2/3	1	NM_002852.4	ENSP00000295927.3
VEPH1	ENST00000362010.7	c.530-9316C>A		intron_variant		1	NM_001167912.2	ENSP00000354919.2

Frequencies

GnomAD3 genomes Cov.: 31

GnomAD4 exome AF: 0.00000229 AC: 3 AN: 1308830 Hom.: 0 Cov.: 35 AF XY: 0.00000310 AC XY: 2 AN XY: 644164

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: 0.00000190

Gnomad4 OTH exome AF: 0.0000184

GnomAD4 genome Cov.: 31

Bravo AF: 0.00000378

ClinVar

Significance: Uncertain significance

Submissions summary: Uncertain:1

Revision: criteria provided, single submitter

Submissions by phenotype

not specified Uncertain:1

Uncertain significance, criteria provided, single submitter

clinical testing

Ambry Genetics

Oct 24, 2023

The c.422G>T (p.R141L) alteration is located in exon 2 (coding exon 2) of the PTX3 gene. This alteration results from a G to T substitution at nucleotide position 422, causing the arginine (R) at amino acid position 141 to be replaced by a leucine (L). 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	0.078
BayesDel_addAF	Benign	-0.29	T
BayesDel_noAF	Benign	-0.66
CADD	Benign	14
DANN	Benign	0.68
DEOGEN2	Benign	0.14	T
Eigen	Benign	-1.2
Eigen_PC	Benign	-1.2
FATHMM_MKL	Benign	0.062	N
LIST_S2	Benign	0.40	T
M_CAP	Benign	0.037	D
MetaRNN	Benign	0.074	T
MetaSVM	Benign	-0.99	T
MutationAssessor	Benign	1.8	L
PrimateAI	Pathogenic	0.85	D
PROVEAN	Benign	-1.7	N
REVEL	Benign	0.030
Sift	Benign	0.11	T
Sift4G	Benign	0.15	T
Polyphen		0.0	B
Vest4		0.074
MutPred		0.28		Gain of helix (P = 0.0164);
MVP		0.20
MPC		0.28
ClinPred		0.14	T
GERP RS		2.9
Varity_R		0.072
gMVP		0.48

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

Other links and lift over

dbSNP: rs373009649; hg19: chr3-157155593;