NM_000484.4:c.1614T>C

Variant names:

Variant summary

Our verdict is Benign. The variant received -21 ACMG points: 0P and 21B. BP4_StrongBP6_Very_StrongBP7BA1

The NM_000484.4(APP):c.1614T>C(p.Tyr538Tyr) variant causes a synonymous change involving the alteration of a non-conserved nucleotide. The variant allele was found at a frequency of 0.00438 in 1,614,066 control chromosomes in the GnomAD database, including 233 homozygotes. In-silico tool predicts a benign outcome for this variant. Variant has been reported in ClinVar as Benign (★★).

Frequency

Genomes: 𝑓 0.023 ( 130 hom., cov: 32)

Exomes 𝑓: 0.0024 ( 103 hom. )

Consequence

APP
NM_000484.4 synonymous

Scores

Clinical Significance

Benign criteria provided, multiple submitters, no conflicts B:6

Conservation

PhyloP100: -2.92

Publications

4 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):

Alzheimer disease type 1
Inheritance: AD Classification: STRONG Submitted by: Genomics England PanelApp, Labcorp Genetics (formerly Invitae)
cerebral amyloid angiopathy, APP-related
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: Benign. The variant received -21 ACMG points.

BP4

Computational evidence support a benign effect (BayesDel_noAF=-0.83).

BP6

Variant 21-25954663-A-G is Benign according to our data. Variant chr21-25954663-A-G is described in ClinVar as Benign. ClinVar VariationId is 339636.Status of the report is criteria_provided_multiple_submitters_no_conflicts, 2 stars.

BP7

Synonymous conserved (PhyloP=-2.92 with no splicing effect.

BA1

GnomAd4 highest subpopulation (AFR) allele frequency at 95% confidence interval = 0.076 is higher than 0.05.

Transcripts

RefSeq

Gene	Transcript	HGVSc	HGVSp	Effect	Exon rank	MANE	Protein	UniProt
APP	NM_000484.4 link	c.1614T>C	p.Tyr538Tyr	synonymous_variant	Exon 13 of 18	ENST00000346798.8	NP_000475.1

Ensembl

Gene	Transcript	HGVSc	HGVSp	Effect	Exon rank	TSL	MANE	Protein	Appris	UniProt
APP	ENST00000346798.8 link	c.1614T>C	p.Tyr538Tyr	synonymous_variant	Exon 13 of 18	1	NM_000484.4	ENSP00000284981.4

Frequencies

GnomAD3 genomes

AF:

0.0229

AC:

3478

AN:

152196

Hom.:

128

Cov.:

show subpopulations

Gnomad AFR

AF:

0.0782

Gnomad AMI

AF:

0.00

Gnomad AMR

AF:

0.0118

Gnomad ASJ

AF:

0.00173

Gnomad EAS

AF:

0.000192

Gnomad SAS

AF:

0.000207

Gnomad FIN

AF:

0.00

Gnomad MID

AF:

0.00949

Gnomad NFE

AF:

0.000294

Gnomad OTH

AF:

0.0139

GnomAD2 exomes

AF:

0.00607

AC:

1524

AN:

251070

AF XY:

0.00452

show subpopulations

Gnomad AFR exome

AF:

0.0801

Gnomad AMR exome

AF:

0.00408

Gnomad ASJ exome

AF:

0.00228

Gnomad EAS exome

AF:

0.00

Gnomad FIN exome

AF:

0.00

Gnomad NFE exome

AF:

0.000352

Gnomad OTH exome

AF:

0.00278

GnomAD4 exome

AF:

0.00244

AC:

3573

AN:

1461752

Hom.:

103

Cov.:

AF XY:

0.00214

AC XY:

1558

AN XY:

727154

show subpopulations

African (AFR)

AF:

0.0840

AC:

2812

AN:

33472

American (AMR)

AF:

0.00492

AC:

220

AN:

44712

Ashkenazi Jewish (ASJ)

AF:

0.00176

AC:

AN:

26128

East Asian (EAS)

AF:

0.00

AC:

AN:

39698

South Asian (SAS)

AF:

0.000151

AC:

AN:

86212

European-Finnish (FIN)

AF:

0.00

AC:

AN:

53414

Middle Eastern (MID)

AF:

0.00572

AC:

AN:

5768

European-Non Finnish (NFE)

AF:

0.000147

AC:

163

AN:

1111956

Other (OTH)

AF:

0.00474

AC:

286

AN:

60392

Allele Balance Distribution

Red line indicates average allele balance

Average allele balance: 0.471

Heterozygous variant carriers

175

350

526

701

876

0.00

0.20

0.40

0.60

0.80

0.95

Allele balance

Age Distribution

Exome Het

Exome Hom

Variant carriers

180

270

360

450

<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:

0.0229

AC:

3490

AN:

152314

Hom.:

130

Cov.:

AF XY:

0.0227

AC XY:

1693

AN XY:

74492

show subpopulations

African (AFR)

AF:

0.0782

AC:

3250

AN:

41544

American (AMR)

AF:

0.0118

AC:

180

AN:

15300

Ashkenazi Jewish (ASJ)

AF:

0.00173

AC:

AN:

3470

East Asian (EAS)

AF:

0.000193

AC:

AN:

5190

South Asian (SAS)

AF:

0.000207

AC:

AN:

4824

European-Finnish (FIN)

AF:

0.00

AC:

AN:

10628

Middle Eastern (MID)

AF:

0.0102

AC:

AN:

294

European-Non Finnish (NFE)

AF:

0.000294

AC:

AN:

68038

Other (OTH)

AF:

0.0137

AC:

AN:

2114

Allele Balance Distribution

Red line indicates average allele balance

Average allele balance: 0.501

Heterozygous variant carriers

159

318

478

637

796

0.00

0.20

0.40

0.60

0.80

0.95

Allele balance

Age Distribution

Genome Het

Genome Hom

Variant carriers

114

152

190

<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:

0.0118

Hom.:

Bravo

AF:

0.0263

Asia WGS

AF:

0.00433

AC:

AN:

3478

EpiCase

AF:

0.000327

EpiControl

AF:

0.000534

ClinVar

Significance: Benign

Submissions summary: Benign:6

Revision: criteria provided, multiple submitters, no conflicts

LINK: link

Submissions by phenotype

not provided

Benign:4

Nov 16, 2018

GeneDx

Significance:Benign

Review Status:criteria provided, single submitter

Collection Method:clinical testing

- -

Oct 16, 2023

ARUP Laboratories, Molecular Genetics and Genomics, ARUP Laboratories

Significance:Benign

Review Status:criteria provided, single submitter

Collection Method:clinical testing

- -

Aug 31, 2017

Athena Diagnostics

Significance:Benign

Review Status:criteria provided, single submitter

Collection Method:clinical testing

- -

Breakthrough Genomics, Breakthrough Genomics

Significance:Benign

Review Status:criteria provided, single submitter

Collection Method:not provided

- -

Alzheimer disease

Benign:2

Jan 27, 2025

Labcorp Genetics (formerly Invitae), Labcorp

Significance:Benign

Review Status:criteria provided, single submitter

Collection Method:clinical testing

- -

Jan 13, 2018

Illumina Laboratory Services, Illumina

Significance:Benign

Review Status:criteria provided, single submitter

Collection Method:clinical testing

This variant was observed in the ICSL laboratory as part of a predisposition screen in an ostensibly healthy population. It had not been previously curated by ICSL or reported in the Human Gene Mutation Database (HGMD: prior to June 1st, 2018), and was therefore a candidate for classification through an automated scoring system. Utilizing variant allele frequency, disease prevalence and penetrance estimates, and inheritance mode, an automated score was calculated to assess if this variant is too frequent to cause the disease. Based on the score and internal cut-off values, a variant classified as benign is not then subjected to further curation. The score for this variant resulted in a classification of benign for this disease. -

Computational scores

Source: dbNSFP v4.3

Name

Calibrated prediction

Score

Prediction

BayesDel_noAF

Benign

-0.83

CADD

Benign

0.20

(source)

DANN

Benign

0.56

PhyloP100

-2.9

Mutation Taster

=100/0

polymorphism (auto)

(source)

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

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Variant summary

Frequency

Consequence

Scores

Clinical Significance

Conservation

Publications

ACMG classification

Transcripts

RefSeq

Ensembl

Frequencies

Age Distribution

Age Distribution

ClinVar

Submissions by phenotype

Computational scores

Splicing

Publications

Other links and lift over