dbSNP rs771259264: APOA2:c.185+1G>A (chr1-161222917-C-T) – ACMG Classification: Uncertain_significance (0 pts)

Variant summary

Our verdict is Uncertain significance. The variant received 0 ACMG points: 1P and 1B. PP5BS2_Supporting

The NM_001643.2(APOA2):c.185+1G>A variant causes a splice donor, intron change. The variant allele was found at a frequency of 0.0000041 in 1,461,892 control chromosomes in the GnomAD database, with no homozygous occurrence. 3/3 splice prediction tools predicting alterations to normal splicing. Variant has been reported in ClinVar as Pathogenic (no stars).

Frequency

Genomes: not found (cov: 32)

Exomes 𝑓: 0.0000041 ( 0 hom. )

Consequence

APOA2
NM_001643.2 splice_donor, intron

Scores

Splicing: ADA: 1.000

Clinical Significance

Pathogenic no assertion criteria provided P:1

Conservation

PhyloP100: 3.76

Publications

1 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: Uncertain_significance. The variant received 0 ACMG points.

PP5

Variant 1-161222917-C-T is Pathogenic according to our data. Variant chr1-161222917-C-T is described in ClinVar as Pathogenic. ClinVar VariationId is 17935.Status of the report is no_assertion_criteria_provided, 0 stars.

BS2

High AC in GnomAdExome4 at 6 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.185+1G>A		splice_donor intron	N/A	NP_001634.1	P02652

Ensembl Transcripts

Gene	Transcript	Tags	HGVSc	Effect	Exon Rank	Protein	UniProt
APOA2	ENST00000367990.7	TSL:1 MANE Select	c.185+1G>A	splice_donor intron	N/A	ENSP00000356969.3	P02652
APOA2	ENST00000463273.6	TSL:1	c.185+1G>A	splice_donor intron	N/A	ENSP00000476740.2	P02652
APOA2	ENST00000470459.6	TSL:5	c.185+1G>A	splice_donor intron	N/A	ENSP00000477031.1	V9GYS1

Frequencies

GnomAD3 genomes

Cov.:

GnomAD2 exomes

AF:

0.00000398

AC:

AN:

251368

AF XY:

0.00000736

show subpopulations

Gnomad AFR exome

AF:

0.00

Gnomad AMR exome

AF:

0.00

Gnomad ASJ exome

AF:

0.00

Gnomad EAS exome

AF:

0.0000544

Gnomad FIN exome

AF:

0.00

Gnomad NFE exome

AF:

0.00

Gnomad OTH exome

AF:

0.00

GnomAD4 exome

AF:

0.00000410

AC:

AN:

1461892

Hom.:

Cov.:

AF XY:

0.00000413

AC XY:

AN XY:

727248

show subpopulations

African (AFR)

AF:

0.00

AC:

AN:

33480

American (AMR)

AF:

0.00

AC:

AN:

44724

Ashkenazi Jewish (ASJ)

AF:

0.00

AC:

AN:

26136

East Asian (EAS)

AF:

0.000126

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:

8.99e-7

AC:

AN:

1112010

Other (OTH)

AF:

0.00

AC:

AN:

60396

Allele Balance Distribution

Red line indicates average allele balance

Average allele balance: 0.467

Heterozygous variant carriers

0.00

0.20

0.40

0.60

0.80

0.95

Allele balance

Age Distribution

Exome 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

GnomAD4 genome

Cov.:

Alfa

AF:

0.0000409

Hom.:

Bravo

AF:

0.00000756

ExAC

AF:

0.00000824

AC:

ClinVar

ClinVar submissions as Germline

Significance:Pathogenic

Revision:no assertion criteria provided

View on ClinVar

Pathogenic

VUS

Benign

Condition

APOLIPOPROTEIN A-II DEFICIENCY (1)

Computational scores

Source: dbNSFP v4.9

Name

Calibrated prediction

Score

Prediction

BayesDel_addAF

Uncertain

0.089

BayesDel_noAF

Benign

-0.11

CADD

Pathogenic

(source)

DANN

Uncertain

0.99

Eigen

Pathogenic

0.88

Eigen_PC

Pathogenic

0.66

FATHMM_MKL

Uncertain

0.96

PhyloP100

3.8

GERP RS

4.8

PromoterAI

-0.18

Neutral

(source)

Mutation Taster

=0/100

disease causing (ClinVar)

(source)

Splicing

Name

Calibrated prediction

Score

Prediction

dbscSNV1_ADA

Pathogenic

1.0

dbscSNV1_RF

Pathogenic

0.88

SpliceAI score (max)

0.98

Details are displayed if max score is > 0.2

DS_DG_spliceai

0.23

Position offset: 33

DS_DL_spliceai

0.98

Position offset: 1

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

ClinVar

Computational scores

Splicing

Publications

Other links and lift over