21-25881216-T-C

Variant names:

Variant summary

Our verdict is Likely benign. The variant received -6 ACMG points: 0P and 6B. BP4_ModerateBS2

The NM_000484.4(APP):c.*454A>G variant causes a 3 prime UTR change involving the alteration of a non-conserved nucleotide. The variant allele was found at a frequency of 0.000125 in 216,218 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: 𝑓 0.00011 ( 0 hom., cov: 32)

Exomes 𝑓: 0.00017 ( 0 hom. )

Consequence

APP
NM_000484.4 3_prime_UTR

Scores

Clinical Significance

Uncertain significance criteria provided, single submitter U:1

Conservation

PhyloP100: 3.47

Publications

1 publications found

Variant links:

Genes affected

APP (HGNC:620): (amyloid beta precursor protein) This gene encodes a cell surface receptor and transmembrane precursor protein that is cleaved by secretases to form a number of peptides. Some of these peptides are secreted and can bind to the acetyltransferase complex APBB1/TIP60 to promote transcriptional activation, while others form the protein basis of the amyloid plaques found in the brains of patients with Alzheimer disease. In addition, two of the peptides are antimicrobial peptides, having been shown to have bacteriocidal and antifungal activities. Mutations in this gene have been implicated in autosomal dominant Alzheimer disease and cerebroarterial amyloidosis (cerebral amyloid angiopathy). Multiple transcript variants encoding several different isoforms have been found for this gene. [provided by RefSeq, Aug 2014]

APP Gene-Disease associations (from GenCC):

cerebral amyloid angiopathy, APP-related
Inheritance: AD Classification: DEFINITIVE, STRONG Submitted by: ClinGen, Genomics England PanelApp, Labcorp Genetics (formerly Invitae)
Alzheimer disease type 1
Inheritance: AD Classification: STRONG Submitted by: Labcorp Genetics (formerly Invitae), Genomics England PanelApp
ABeta amyloidosis, Arctic type
Inheritance: AD Classification: SUPPORTIVE Submitted by: Orphanet
ABeta amyloidosis, dutch type
Inheritance: AD Classification: SUPPORTIVE Submitted by: Orphanet
ABeta amyloidosis, Iowa type
Inheritance: AD Classification: SUPPORTIVE Submitted by: Orphanet
ABeta amyloidosis, Italian type
Inheritance: AD Classification: SUPPORTIVE Submitted by: Orphanet
ABetaA21G amyloidosis
Inheritance: AD Classification: SUPPORTIVE Submitted by: Orphanet
ABetaL34V amyloidosis
Inheritance: AD Classification: SUPPORTIVE Submitted by: Orphanet
early-onset autosomal dominant Alzheimer disease
Inheritance: AD Classification: SUPPORTIVE Submitted by: Orphanet

APP links:

Genome browser will be placed here

ACMG classification

Classification was made for transcript

Our verdict: Likely_benign. The variant received -6 ACMG points.

BP4

Computational evidence support a benign effect (BayesDel_noAF=-0.43).

BS2

High AC in GnomAd4 at 16 AD gene.

Variant Effect in Transcripts

ACMG analysis was done for transcript: NM_000484.4. You can select a different transcript below to see updated ACMG assignments.

RefSeq Transcripts

Gene	Transcript	Tags	HGVSc	Effect	Exon Rank	Protein	UniProt
APP	NM_000484.4	MANE Select	c.*454A>G	3_prime_UTR	Exon 18 of 18	NP_000475.1	P05067-1
APP	NM_001204301.2		c.*454A>G	3_prime_UTR	Exon 17 of 17	NP_001191230.1	P05067-9
APP	NM_201413.3		c.*454A>G	3_prime_UTR	Exon 17 of 17	NP_958816.1	P05067-8

Ensembl Transcripts

Gene	Transcript	Tags	HGVSc	Effect	Exon Rank	Protein	UniProt
APP	ENST00000346798.8	TSL:1 MANE Select	c.*454A>G	3_prime_UTR	Exon 18 of 18	ENSP00000284981.4	P05067-1
APP	ENST00000357903.7	TSL:1	c.*454A>G	3_prime_UTR	Exon 17 of 17	ENSP00000350578.3	P05067-8
APP	ENST00000348990.9	TSL:1	c.*454A>G	3_prime_UTR	Exon 16 of 16	ENSP00000345463.5	P05067-4

Frequencies

GnomAD3 genomes

AF:

0.000105

AC:

AN:

152150

Hom.:

Cov.:

show subpopulations

Gnomad AFR

AF:

0.0000241

Gnomad AMI

AF:

0.00

Gnomad AMR

AF:

0.00

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:

0.000221

Gnomad OTH

AF:

0.00

GnomAD4 exome

AF:

0.000172

AC:

AN:

64068

Hom.:

Cov.:

AF XY:

0.000120

AC XY:

AN XY:

33376

show subpopulations

African (AFR)

AF:

0.00

AC:

AN:

1604

American (AMR)

AF:

0.000536

AC:

AN:

3730

Ashkenazi Jewish (ASJ)

AF:

0.00

AC:

AN:

1498

East Asian (EAS)

AF:

0.00

AC:

AN:

3416

South Asian (SAS)

AF:

0.00

AC:

AN:

8778

European-Finnish (FIN)

AF:

0.00

AC:

AN:

3134

Middle Eastern (MID)

AF:

0.00

AC:

AN:

240

European-Non Finnish (NFE)

AF:

0.000208

AC:

AN:

38404

Other (OTH)

AF:

0.000306

AC:

AN:

3264

Allele Balance Distribution

Red line indicates average allele balance

Average allele balance: 0.534

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

AF:

0.000105

AC:

AN:

152150

Hom.:

Cov.:

AF XY:

0.000161

AC XY:

AN XY:

74332

show subpopulations

African (AFR)

AF:

0.0000241

AC:

AN:

41422

American (AMR)

AF:

0.00

AC:

AN:

15284

Ashkenazi Jewish (ASJ)

AF:

0.00

AC:

AN:

3470

East Asian (EAS)

AF:

0.00

AC:

AN:

5194

South Asian (SAS)

AF:

0.00

AC:

AN:

4826

European-Finnish (FIN)

AF:

0.00

AC:

AN:

10614

Middle Eastern (MID)

AF:

0.00

AC:

AN:

316

European-Non Finnish (NFE)

AF:

0.000221

AC:

AN:

68026

Other (OTH)

AF:

0.00

AC:

AN:

2088

Allele Balance Distribution

Red line indicates average allele balance

Average allele balance: 0.478

Heterozygous variant carriers

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:

0.000424

Hom.:

Bravo

AF:

0.000117

ClinVar

ClinVar submissions

Significance:Uncertain significance

Revision:criteria provided, single submitter

View on ClinVar

Pathogenic

VUS

Benign

Condition

Alzheimer disease (1)

Computational scores

Source: dbNSFP v4.9

Name

Calibrated prediction

Score

Prediction

BayesDel_noAF

Benign

-0.43

CADD

Benign

(source)

DANN

Benign

0.90

PhyloP100

3.5

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

You must be logged in to view publications. This limit was set because tens of millions (!) of queries from AI bots are generated daily.

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