Genetic Variant ENST00000455275.1:n.178-4309C>T (chr21-26171301-C-T) – ACMG Classification: Benign (-10 pts)

Variant summary

Our verdict is Benign. Variant got -10 ACMG points: 2P and 12B. PM2BP4_StrongBP6_Very_Strong

The ENST00000455275.1(ENSG00000224541):n.178-4309C>T variant causes a intron change involving the alteration of a non-conserved nucleotide. The variant allele was found at a frequency of 0.000966 in 152,124 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 Likely benign (★★).

Frequency

Genomes: 𝑓 0.00097 ( 0 hom., cov: 32)

Consequence

ENSG00000224541
ENST00000455275.1 intron

Scores

Clinical Significance

Likely benign criteria provided, multiple submitters, no conflicts B:3

Conservation

PhyloP100: 1.28

Variant links:

Genes affected

ENSG00000224541 (HGNC:):

ENSG00000224541 links:

APP-DT (HGNC:55075): (APP divergent transcript)

APP-DT links:

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 links:

Genome browser will be placed here

ACMG classification

Classification made for transcript

Verdict is Benign. Variant got -10 ACMG points.

PM2

Very rare variant in population databases, with high coverage;

BP4

Computational evidence support a benign effect (BayesDel_noAF=-0.88).

BP6

Variant 21-26171301-C-T is Benign according to our data. Variant chr21-26171301-C-T is described in ClinVar as [Likely_benign]. Clinvar id is 1117397.Status of the report is criteria_provided_multiple_submitters_no_conflicts, 2 stars.

Transcripts

RefSeq

Gene	Transcript	HGVSc	Effect	Exon rank	Protein	UniProt
APP-DT	NR_186395.1 link	n.186+249C>T	intron_variant	Intron 1 of 2
APP-DT	NR_186396.1 link	n.186+249C>T	intron_variant	Intron 1 of 3
APP	NM_001136131.3 link	c.-365G>A	upstream_gene_variant		NP_001129603.1	P05067A0A0A0MRG2B4DJT9

Ensembl

Gene	Transcript	HGVSc	Effect	Exon rank	TSL
ENSG00000224541	ENST00000455275.1 link	n.178-4309C>T	intron_variant	Intron 1 of 1	2
APP-DT	ENST00000608591.5 link	n.182+249C>T	intron_variant	Intron 1 of 2	4
APP-DT	ENST00000609365.2 link	n.172+249C>T	intron_variant	Intron 1 of 3	4

Frequencies

GnomAD3 genomes

AF:

0.000967

AC:

147

AN:

152006

Hom.:

Cov.:

show subpopulations

Gnomad AFR

AF:

0.000218

Gnomad AMI

AF:

0.00

Gnomad AMR

AF:

0.000787

Gnomad ASJ

AF:

0.00259

Gnomad EAS

AF:

0.00

Gnomad SAS

AF:

0.000208

Gnomad FIN

AF:

0.000377

Gnomad MID

AF:

0.00

Gnomad NFE

AF:

0.00162

Gnomad OTH

AF:

0.000957

We have no GnomAD4 exomes data on this position. Probably position not covered by the project.

GnomAD4 genome

AF:

0.000966

AC:

147

AN:

152124

Hom.:

Cov.:

AF XY:

0.000901

AC XY:

AN XY:

74384

show subpopulations

Gnomad4 AFR

AF:

0.000217

Gnomad4 AMR

AF:

0.000786

Gnomad4 ASJ

AF:

0.00259

Gnomad4 EAS

AF:

0.00

Gnomad4 SAS

AF:

0.000208

Gnomad4 FIN

AF:

0.000377

Gnomad4 NFE

AF:

0.00162

Gnomad4 OTH

AF:

0.000947

Alfa

AF:

0.00116

Hom.:

Bravo

AF:

0.00111

ClinVar

Significance: Likely benign

Submissions summary: Benign:3

Revision: criteria provided, multiple submitters, no conflicts

LINK: link

Submissions by phenotype

not provided

Benign:1

Dec 01, 2024

CeGaT Center for Human Genetics Tuebingen

Significance: Likely benign

Review Status: criteria provided, single submitter

Collection Method: clinical testing

APP: BS1 -

APP-related disorder

Benign:1

Jun 11, 2019

PreventionGenetics, part of Exact Sciences

Significance: Likely benign

Review Status: no assertion criteria provided

Collection Method: clinical testing

This variant is classified as likely benign based on ACMG/AMP sequence variant interpretation guidelines (Richards et al. 2015 PMID: 25741868, with internal and published modifications). -

Alzheimer disease

Benign:1

Jul 05, 2022

Labcorp Genetics (formerly Invitae), Labcorp

Significance: Likely benign

Review Status: criteria provided, single submitter

Collection Method: clinical testing

- -

Computational scores

Source: dbNSFP v4.3

Name

Calibrated prediction

Score

Prediction

BayesDel_noAF

Benign

-0.88

CADD

Benign

9.1

DANN

Benign

0.65

Splicing

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

Publications

LitVar

Below is the list of publications found by LitVar. It may be empty.

Variant summary

Frequency

Consequence

Scores

Clinical Significance

Conservation

ACMG classification

Transcripts

RefSeq

Ensembl

Frequencies

ClinVar

Submissions by phenotype

Computational scores

Splicing

Publications

LitVar

Other links and lift over