7-95405455-G-T

Variant names:

• chr7-95405455-G-T
• rs765733490
• NM_000305.3:c.940C>A

Variant summary

Our verdict is Uncertain significance. The variant received 4 ACMG points: 4P and 0B. PM2 PP3_Moderate

The NM_000305.3(PON2):​c.940C>A​(p.Pro314Thr) variant causes a missense change involving the alteration of a conserved nucleotide. The variant allele was found at a frequency of 0.00000137 in 1,461,300 control chromosomes in the GnomAD database, with no homozygous occurrence. In-silico tool predicts a pathogenic 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. P314A) has been classified as Uncertain significance.

• Frequency:
  • Genomes: not found (cov: 33)
  • Exomes 𝑓: 0.0000014 (0 hom.)
• Consequence: PON2 NM_000305.3 missense
• Clinical Significance: Not reported in ClinVar
• Conservation: PhyloP100: 9.26
• Publications: 0 publications found

Genes affected

PON2 (HGNC:9205): (paraoxonase 2) This gene encodes a member of the paraoxonase gene family, which includes three known members located adjacent to each other on the long arm of chromosome 7. The encoded protein is ubiquitously expressed in human tissues, membrane-bound, and may act as a cellular antioxidant, protecting cells from oxidative stress. Hydrolytic activity against acylhomoserine lactones, important bacterial quorum-sensing mediators, suggests the encoded protein may also play a role in defense responses to pathogenic bacteria. Mutations in this gene may be associated with vascular disease and a number of quantitative phenotypes related to diabetes. Alternatively spliced transcript variants encoding different isoforms have been described. [provided by RefSeq, Jul 2008]

PON2 Gene-Disease associations (from GenCC):

• amyotrophic lateral sclerosis

  Inheritance: AD Classification: SUPPORTIVE Submitted by: Orphanet

ENSG00000233942 (HGNC:):

ACMG classification

Our verdict: Uncertain_significance. The variant received 4 ACMG points.

• PM2: Very rare variant in population databases, with high coverage
• PP3: MetaRNN computational evidence supports a deleterious effect, 0.931

Variant Effect in Transcripts

ACMG analysis was done for transcript: NM_000305.3. You can select a different transcript below to see updated ACMG assignments.

RefSeq Transcripts

Sel.	Gene	Transcript	Tags	HGVSc	HGVSp	Effect	Exon Rank	Protein	UniProt
	PON2	NM_000305.3	MANE Select	c.940C>A	p.Pro314Thr	missense	Exon 9 of 9	NP_000296.2	Q15165-2
	PON2	NM_001018161.2		c.904C>A	p.Pro302Thr	missense	Exon 9 of 9	NP_001018171.1	Q15165-3

Ensembl Transcripts

Sel.	Gene	Transcript	Tags	HGVSc	HGVSp	Effect	Exon Rank	Protein	UniProt
	PON2	ENST00000222572.8	TSL:1 MANE Select	c.940C>A	p.Pro314Thr	missense	Exon 9 of 9	ENSP00000222572.3	Q15165-2
	PON2	ENST00000633192.1	TSL:1	c.1003C>A	p.Pro335Thr	missense	Exon 9 of 9	ENSP00000488378.1	A0A0J9YXF2
	PON2	ENST00000633531.1	TSL:1	c.940C>A	p.Pro314Thr	missense	Exon 9 of 9	ENSP00000488838.1	Q15165-2

Frequencies

GnomAD3 genomes Cov.: 33

GnomAD4 exome AF: 0.00000137 AC: 2 AN: 1461300 Hom.: 0 Cov.: 30 AF XY: 0.00000138 AC XY: 1 AN XY: 726958

African (AFR) AF: 0.00 AC: 0 AN: 33446

American (AMR) AF: 0.00 AC: 0 AN: 44722

Ashkenazi Jewish (ASJ) AF: 0.00 AC: 0 AN: 26124

East Asian (EAS) AF: 0.00 AC: 0 AN: 39684

South Asian (SAS) AF: 0.00 AC: 0 AN: 86246

European-Finnish (FIN) AF: 0.00 AC: 0 AN: 53416

Middle Eastern (MID) AF: 0.00 AC: 0 AN: 5764

European-Non Finnish (NFE) AF: 9.00e-7 AC: 1 AN: 1111522

Other (OTH) AF: 0.0000166 AC: 1 AN: 60376

GnomAD4 genome Cov.: 33

ClinVar

Not reported in ClinVar

Computational scores

Source: dbNSFP v4.9

Name	Calibrated prediction	Score	Prediction
AlphaMissense	Uncertain	0.36
BayesDel_addAF	Uncertain	0.11	D
BayesDel_noAF	Uncertain	-0.080
CADD	Uncertain	25
DANN	Uncertain	1.0
DEOGEN2	Uncertain	0.69	D
Eigen	Pathogenic	0.76
Eigen_PC	Pathogenic	0.68
FATHMM_MKL	Pathogenic	0.99	D
LIST_S2	Pathogenic	0.98	D
M_CAP	Benign	0.020	T
MetaRNN	Pathogenic	0.93	D
MetaSVM	Benign	-0.56	T
MutationAssessor	Uncertain	2.8	M
PhyloP100		9.3
PrimateAI	Uncertain	0.49	T
PROVEAN	Pathogenic	-6.5	D
REVEL	Uncertain	0.39
Sift	Uncertain	0.0030	D
Sift4G	Uncertain	0.0090	D
Polyphen		1.0	D
Vest4		0.65
MutPred		0.79		Loss of methylation at K313 (P = 0.0685)
MVP		0.73
MPC		0.23
ClinPred		0.99	D
GERP RS		4.6
RBP_binding_hub_radar		0.0
RBP_regulation_power_radar		1.7
Varity_R		0.67
gMVP		0.72
Mutation Taster		=39/61	disease causing

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

Other links and lift over

dbSNP: rs765733490; hg19: chr7-95034767;