12-56319865-T-C

Position:

• chr12-56319865-T-C

Variant summary

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

The NM_014871.6(PAN2):​c.2945A>G​(p.Glu982Gly) variant causes a missense, splice region change involving the alteration of a conserved nucleotide. The variant was absent in control chromosomes in GnomAD project. In-silico tool predicts a benign outcome for this variant. 3/3 splice prediction tools predicting alterations to normal splicing. Variant has been reported in ClinVar as Uncertain significance (★).

• Frequency: Genomes: not found (cov: 32)
• Consequence: PAN2 NM_014871.6 missense, splice_region
• Scores: Splicing: ADA: 0.9999
• Clinical Significance: Uncertain significance criteria provided, single submitter U:1
• Conservation: PhyloP100: 7.90

Genes affected

PAN2 (HGNC:20074): (poly(A) specific ribonuclease subunit PAN2) This gene encodes a deadenylase that functions as the catalytic subunit of the polyadenylate binding protein dependent poly(A) nuclease complex. The encoded protein is a magnesium dependent 3' to 5' exoribonuclease that is involved in the degradation of cytoplasmic mRNAs. Alternate splicing results in multiple transcript variants. [provided by RefSeq, Oct 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/exons	MANE	Protein	UniProt
PAN2	NM_014871.6	c.2945A>G	p.Glu982Gly	missense_variant, splice_region_variant	21/26	ENST00000440411.8	NP_055686.4

Ensembl

Gene	Transcript	HGVSc	HGVSp	Effect	#exon/exons	TSL	MANE	Protein	Appris	UniProt
PAN2	ENST00000440411.8	c.2945A>G	p.Glu982Gly	missense_variant, splice_region_variant	21/26	1	NM_014871.6	ENSP00000388231.3

Frequencies

GnomAD3 genomes Cov.: 32

GnomAD4 exome Cov.: 33

GnomAD4 genome Cov.: 32

ClinVar

Significance: Uncertain significance

Submissions summary: Uncertain:1

Revision: criteria provided, single submitter

Submissions by phenotype

not provided Uncertain:1

Uncertain significance, criteria provided, single submitter

clinical testing

GeneDx

Apr 29, 2024

Reported as de novo in a cohort of individuals with developmental disorders undergoing exome sequencing, but additional clinical information was not included (PMID: 33057194); Not observed at significant frequency in large population cohorts (gnomAD); In silico analysis supports a deleterious effect on splicing; In silico analysis supports that this missense variant has a deleterious effect on protein structure/function; This variant is associated with the following publications: (PMID: 33057194, 35982159) -

Computational scores

Source: dbNSFP v4.3

Name	Calibrated prediction	Score	Prediction
AlphaMissense	Pathogenic	0.62
BayesDel_addAF	Benign	-0.088	T
BayesDel_noAF	Benign	-0.36
CADD	Pathogenic	33
DANN	Uncertain	1.0
DEOGEN2	Benign	0.18	T;T;.;.;T
Eigen	Benign	0.18
Eigen_PC	Uncertain	0.35
FATHMM_MKL	Pathogenic	0.99	D
LIST_S2	Uncertain	0.95	.;D;D;D;.
M_CAP	Benign	0.0090	T
MetaRNN	Benign	0.23	T;T;T;T;T
MetaSVM	Benign	-1.1	T
MutationAssessor	Benign	0.93	L;L;.;.;L
PrimateAI	Uncertain	0.65	T
PROVEAN	Uncertain	-3.6	D;.;D;D;D
REVEL	Benign	0.13
Sift	Benign	0.050	D;.;T;T;D
Sift4G	Benign	0.086	T;T;T;T;T
Polyphen		0.12	B;B;B;B;B
Vest4		0.39
MutPred		0.52		Gain of catalytic residue at F981 (P = 0.0026);Gain of catalytic residue at F981 (P = 0.0026);.;.;Gain of catalytic residue at F981 (P = 0.0026);
MVP		0.24
MPC		0.74
ClinPred		0.94	D
GERP RS		5.6
Varity_R		0.37
gMVP		0.57

Splicing

Name	Calibrated prediction	Score	Prediction
dbscSNV1_ADA	Pathogenic	1.0
dbscSNV1_RF	Pathogenic	0.98
SpliceAI score (max)		0.76		Details are displayed if max score is > 0.2
DS_DG_spliceai		0.45		Position offset: 35
DS_DL_spliceai		0.76		Position offset: -1

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: chr12-56713649;