Genetic Variant APOA2:p.Leu83Leu (chr1-161222461-G-A) – ACMG Classification: Benign (-8 pts)

Variant summary

Our verdict is Benign. The variant received -8 ACMG points: 0P and 8B. BP4_StrongBP6_ModerateBP7BS2_Supporting

The NM_001643.2(APOA2):c.247C>T(p.Leu83Leu) variant causes a synonymous change involving the alteration of a non-conserved nucleotide. The variant allele was found at a frequency of 0.000581 in 1,614,218 control chromosomes in the GnomAD database, including 5 homozygotes. In-silico tool predicts a benign outcome for this variant. Variant has been reported in ClinVar as Benign (★).

Frequency

Genomes: 𝑓 0.0030 ( 1 hom., cov: 31)

Exomes 𝑓: 0.00032 ( 4 hom. )

Consequence

APOA2
NM_001643.2 synonymous

Scores

Clinical Significance

Benign criteria provided, single submitter B:1

Conservation

PhyloP100: 0.0770

Publications

3 publications found

Variant links:

Genes affected

APOA2 (HGNC:601): (apolipoprotein A2) This gene encodes apolipoprotein (apo-) A-II, which is the second most abundant protein of the high density lipoprotein particles. The protein is found in plasma as a monomer, homodimer, or heterodimer with apolipoprotein D. Defects in this gene may result in apolipoprotein A-II deficiency or hypercholesterolemia. [provided by RefSeq, Jul 2008]

APOA2 Gene-Disease associations (from GenCC):

apolipoprotein A-II amyloidosis
Inheritance: AD Classification: SUPPORTIVE Submitted by: Orphanet

APOA2 links:

Genome browser will be placed here

ACMG classification

Classification was made for transcript

Our verdict: Benign. The variant received -8 ACMG points.

BP4

Computational evidence support a benign effect (BayesDel_noAF=-0.85).

BP6

Variant 1-161222461-G-A is Benign according to our data. Variant chr1-161222461-G-A is described in ClinVar as Benign. ClinVar VariationId is 632643.Status of the report is criteria_provided_single_submitter, 1 stars.

BP7

Synonymous conserved (PhyloP=0.077 with no splicing effect.

BS2

High AC in GnomAd4 at 463 AD gene. Variant has AC lower than other variant known as pathogenic in the gene, so the strength is limited to Supporting.

Variant Effect in Transcripts

ACMG analysis was done for transcript: NM_001643.2. 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
	APOA2	NM_001643.2	MANE Select	c.247C>T	p.Leu83Leu	synonymous	Exon 4 of 4	NP_001634.1	P02652

Ensembl Transcripts

Gene	Transcript	Tags	HGVSc	HGVSp	Effect	Exon Rank	Protein	UniProt
APOA2	ENST00000367990.7	TSL:1 MANE Select	c.247C>T	p.Leu83Leu	synonymous	Exon 4 of 4	ENSP00000356969.3	P02652
APOA2	ENST00000463273.6	TSL:1	c.247C>T	p.Leu83Leu	synonymous	Exon 3 of 3	ENSP00000476740.2	P02652
APOA2	ENST00000491350.1	TSL:1	c.*30C>T		3_prime_UTR	Exon 2 of 2	ENSP00000477353.1	Q76EI7

Frequencies

GnomAD3 genomes

AF:

0.00303

AC:

461

AN:

152210

Hom.:

Cov.:

show subpopulations

Gnomad AFR

AF:

0.0106

Gnomad AMI

AF:

0.00

Gnomad AMR

AF:

0.00118

Gnomad ASJ

AF:

0.00

Gnomad EAS

AF:

0.00

Gnomad SAS

AF:

0.00

Gnomad FIN

AF:

0.00

Gnomad MID

AF:

0.00

Gnomad NFE

AF:

0.00

Gnomad OTH

AF:

0.00143

GnomAD2 exomes

AF:

0.000740

AC:

186

AN:

251464

AF XY:

0.000500

show subpopulations

Gnomad AFR exome

AF:

0.0105

Gnomad AMR exome

AF:

0.000318

Gnomad ASJ exome

AF:

0.00

Gnomad EAS exome

AF:

0.00

Gnomad FIN exome

AF:

0.00

Gnomad NFE exome

AF:

0.0000176

Gnomad OTH exome

AF:

0.000489

GnomAD4 exome

AF:

0.000325

AC:

475

AN:

1461890

Hom.:

Cov.:

AF XY:

0.000279

AC XY:

203

AN XY:

727246

show subpopulations

African (AFR)

AF:

0.0119

AC:

400

AN:

33480

American (AMR)

AF:

0.000380

AC:

AN:

44724

Ashkenazi Jewish (ASJ)

AF:

0.00

AC:

AN:

26136

East Asian (EAS)

AF:

0.00

AC:

AN:

39700

South Asian (SAS)

AF:

0.00

AC:

AN:

86258

European-Finnish (FIN)

AF:

0.00

AC:

AN:

53420

Middle Eastern (MID)

AF:

0.00

AC:

AN:

5768

European-Non Finnish (NFE)

AF:

0.0000252

AC:

AN:

1112008

Other (OTH)

AF:

0.000497

AC:

AN:

60396

Allele Balance Distribution

Red line indicates average allele balance

Average allele balance: 0.462

Heterozygous variant carriers

101

126

0.00

0.20

0.40

0.60

0.80

0.95

Allele balance

Age Distribution

Exome Het

Exome Hom

Variant carriers

100

<30

30-35

35-40

40-45

45-50

50-55

55-60

60-65

65-70

70-75

75-80

>80

Age

GnomAD4 genome

AF:

0.00304

AC:

463

AN:

152328

Hom.:

Cov.:

AF XY:

0.00286

AC XY:

213

AN XY:

74480

show subpopulations

African (AFR)

AF:

0.0106

AC:

442

AN:

41572

American (AMR)

AF:

0.00118

AC:

AN:

15300

Ashkenazi Jewish (ASJ)

AF:

0.00

AC:

AN:

3470

East Asian (EAS)

AF:

0.00

AC:

AN:

5178

South Asian (SAS)

AF:

0.00

AC:

AN:

4830

European-Finnish (FIN)

AF:

0.00

AC:

AN:

10620

Middle Eastern (MID)

AF:

0.00

AC:

AN:

294

European-Non Finnish (NFE)

AF:

0.00

AC:

AN:

68038

Other (OTH)

AF:

0.00142

AC:

AN:

2114

Allele Balance Distribution

Red line indicates average allele balance

Average allele balance: 0.507

Heterozygous variant carriers

114

142

0.00

0.20

0.40

0.60

0.80

0.95

Allele balance

Age Distribution

Genome Het

Variant carriers

<30

30-35

35-40

40-45

45-50

50-55

55-60

60-65

65-70

70-75

75-80

>80

Age

Alfa

AF:

0.00155

Hom.:

Bravo

AF:

0.00348

Asia WGS

AF:

0.000866

AC:

AN:

3478

ClinVar

ClinVar submissions as Germline

Significance:Benign

Revision:criteria provided, single submitter

View on ClinVar

Pathogenic

VUS

Benign

Condition

not specified (1)

Computational scores

Source: dbNSFP v4.9

Name

Calibrated prediction

Score

Prediction

BayesDel_noAF

Benign

-0.85

CADD

Benign

1.6

(source)

DANN

Benign

0.60

PhyloP100

0.077

RBP_binding_hub_radar

0.0

RBP_regulation_power_radar

1.1

Mutation Taster

=100/0

polymorphism

(source)

Splicing

Name

Calibrated prediction

Score

Prediction

SpliceAI score (max)

0.14

Details are displayed if max score is > 0.2

Find out detailed SpliceAI scores and Pangolin per-transcript scores at spliceailookup.broadinstitute.org

Publications

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Variant summary

Frequency

Consequence

Scores

Clinical Significance

Conservation

Publications

ACMG classification

Variant Effect in Transcripts

RefSeq Transcripts

Ensembl Transcripts

Frequencies

Age Distribution

Age Distribution

ClinVar

Computational scores

Splicing

Publications

Other links and lift over