19-56813949-A-G

Position:

• chr19-56813949-A-G

Variant summary

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

The NM_006210.3(PEG3):​c.4493T>C​(p.Ile1498Thr) variant causes a missense change involving the alteration of a non-conserved nucleotide. The variant allele was found at a frequency of 0.00000342 in 1,461,848 control chromosomes in the GnomAD database, with no homozygous occurrence. In-silico tool predicts a benign outcome for this variant. Variant has been reported in ClinVar as Uncertain significance (★).

• Frequency:
  • Genomes: not found (cov: 32)
  • Exomes 𝑓: 0.0000034 (0 hom.)
• Consequence: PEG3 NM_006210.3 missense
• Clinical Significance: Uncertain significance criteria provided, single submitter U:1
• Conservation: PhyloP100: 0.233

Genes affected

PEG3 (HGNC:8826): (paternally expressed 3) In human, ZIM2 and PEG3 are treated as two distinct genes though they share multiple 5' exons and a common promoter and both genes are paternally expressed (PMID:15203203). Alternative splicing events connect their shared 5' exons either with the remaining 4 exons unique to ZIM2, or with the remaining 2 exons unique to PEG3. In contrast, in other mammals ZIM2 does not undergo imprinting and, in mouse, cow, and likely other mammals as well, the ZIM2 and PEG3 genes do not share exons. Human PEG3 protein belongs to the Kruppel C2H2-type zinc finger protein family. PEG3 may play a role in cell proliferation and p53-mediated apoptosis. PEG3 has also shown tumor suppressor activity and tumorigenesis in glioma and ovarian cells. Alternative splicing of this PEG3 gene results in multiple transcript variants encoding distinct isoforms. [provided by RefSeq, Sep 2009]

ZIM2 (HGNC:12875): (zinc finger imprinted 2) In human, ZIM2 and PEG3 (GeneID:5178) are two distinct genes that share a set of 5' exons and have a common promoter, and both genes are paternally expressed. Alternative splicing events connect the shared exons either with the remaining 4 exons unique to ZIM2, or with the remaining 2 exons unique to PEG3. This is in contrast to mouse and cow, where ZIM2 and PEG3 genes do not share exons in common, and the imprinting status of ZIM2 is also not conserved amongst mammals. Additional 5' alternatively spliced transcripts encoding the same protein have been found for the human ZIM2 gene. [provided by RefSeq, Oct 2010]

(HGNC:):

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=0.12006155).

Transcripts

RefSeq

Gene	Transcript	HGVSc	HGVSp	Effect	#exon/exons	MANE	Protein	UniProt
PEG3	NM_006210.3	c.4493T>C	p.Ile1498Thr	missense_variant	10/10	ENST00000326441.15	NP_006201.1
ZIM2	NM_001387356.1	c.490+3797T>C		intron_variant		ENST00000629319.3	NP_001374285.1

Ensembl

Gene	Transcript	HGVSc	HGVSp	Effect	#exon/exons	TSL	MANE	Protein	Appris	UniProt
PEG3	ENST00000326441.15	c.4493T>C	p.Ile1498Thr	missense_variant	10/10	1	NM_006210.3	ENSP00000326581	P1
ZIM2	ENST00000629319.3	c.490+3797T>C		intron_variant		5	NM_001387356.1	ENSP00000486502	A2
	ENST00000652504.1	n.844+3721A>G		intron_variant, non_coding_transcript_variant

Frequencies

GnomAD3 genomes Cov.: 32

GnomAD4 exome AF: 0.00000342 AC: 5 AN: 1461848 Hom.: 0 Cov.: 34 AF XY: 0.00000138 AC XY: 1 AN XY: 727220

Gnomad4 AFR exome AF: 0.00

Gnomad4 AMR exome AF: 0.0000224

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: 0.00000360

Gnomad4 OTH exome AF: 0.00

GnomAD4 genome Cov.: 32

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

Submissions by phenotype

not specified Uncertain:1

Uncertain significance, criteria provided, single submitter

clinical testing

Ambry Genetics

Apr 22, 2024

The c.4493T>C (p.I1498T) alteration is located in exon 10 (coding exon 7) of the PEG3 gene. This alteration results from a T to C substitution at nucleotide position 4493, causing the isoleucine (I) at amino acid position 1498 to be replaced by a threonine (T). 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	Pathogenic	0.62
BayesDel_addAF	Benign	-0.21	T
BayesDel_noAF	Benign	-0.54
CADD	Benign	19
DANN	Uncertain	0.99
DEOGEN2	Benign	0.33	T;.;.;.;.;.;.;.;.;.;.;T;T
Eigen	Benign	-0.49
Eigen_PC	Benign	-0.60
FATHMM_MKL	Benign	0.11	N
LIST_S2	Benign	0.83	.;.;.;.;.;.;.;.;T;T;T;.;T
M_CAP	Benign	0.0065	T
MetaRNN	Benign	0.12	T;T;T;T;T;T;T;T;T;T;T;T;T
MetaSVM	Benign	-0.94	T
MutationAssessor	Uncertain	2.1	M;.;.;.;.;.;.;.;.;.;.;M;M
PrimateAI	Uncertain	0.54	T
PROVEAN	Uncertain	-2.9	D;.;.;.;.;.;.;.;.;.;.;.;.
REVEL	Benign	0.024
Sift	Uncertain	0.0010	D;.;.;.;.;.;.;.;.;.;.;.;.
Sift4G	Benign	0.23	T;.;.;.;.;.;.;.;.;T;T;T;T
Polyphen		0.95	P;.;.;.;.;.;.;.;.;.;.;P;P
Vest4		0.24
MutPred		0.40		Gain of phosphorylation at I1498 (P = 0.0168);.;.;.;.;.;.;.;.;.;.;Gain of phosphorylation at I1498 (P = 0.0168);Gain of phosphorylation at I1498 (P = 0.0168);
MVP		0.53
MPC		0.061
ClinPred		0.66	D
GERP RS		1.5
RBP_binding_hub_radar		0.0
RBP_regulation_power_radar		1.7
Varity_R		0.21

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: rs2059729649; hg19: chr19-57325317;