rs34506289

Positions:

Variant summary

Our verdict is Benign. Variant got -21 ACMG points: 0P and 21B. BP4_StrongBP6_Very_StrongBP7BS1BS2

The NM_000038.6(APC):c.5265G>A(p.Ala1755=) variant causes a synonymous change involving the alteration of a non-conserved nucleotide. The variant allele was found at a frequency of 0.00746 in 1,614,050 control chromosomes in the GnomAD database, including 62 homozygotes. In-silico tool predicts a benign outcome for this variant. Variant has been reported in ClinVar as Likely benign (★★). Synonymous variant affecting the same amino acid position (i.e. A1755A) has been classified as Benign.

Frequency

Genomes: 𝑓 0.0065 ( 7 hom., cov: 32)

Exomes 𝑓: 0.0076 ( 55 hom. )

Consequence

APC
NM_000038.6 synonymous

Scores

Clinical Significance

Benign/Likely benign criteria provided, multiple submitters, no conflicts B:25

Conservation

PhyloP100: 0.131

Variant links:

Genes affected

APC (HGNC:583): (APC regulator of WNT signaling pathway) This gene encodes a tumor suppressor protein that acts as an antagonist of the Wnt signaling pathway. It is also involved in other processes including cell migration and adhesion, transcriptional activation, and apoptosis. Defects in this gene cause familial adenomatous polyposis (FAP), an autosomal dominant pre-malignant disease that usually progresses to malignancy. Mutations in the APC gene have been found to occur in most colorectal cancers, where disease-associated mutations tend to be clustered in a small region designated the mutation cluster region (MCR) and result in a truncated protein product. [provided by RefSeq, Jun 2022]

APC links:

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ACMG classification

Classification made for transcript

Verdict is Benign. Variant got -21 ACMG points.

BP4

Computational evidence support a benign effect (BayesDel_noAF=-0.8).

BP6

Variant 5-112840859-G-A is Benign according to our data. Variant chr5-112840859-G-A is described in ClinVar as [Likely_benign]. Clinvar id is 42244.Status of the report is criteria_provided_multiple_submitters_no_conflicts, 2 stars. Variant chr5-112840859-G-A is described in Lovd as [Benign]. Variant chr5-112840859-G-A is described in Lovd as [Likely_benign].

BP7

Synonymous conserved (PhyloP=0.131 with no splicing effect.

BS1

Variant frequency is greater than expected in population afr. gnomad4 allele frequency = 0.00648 (987/152258) while in subpopulation AFR AF= 0.009 (374/41536). AF 95% confidence interval is 0.00825. There are 7 homozygotes in gnomad4. There are 420 alleles in male gnomad4 subpopulation. Median coverage is 32. This position pass quality control queck.

BS2

High AC in GnomAd4 at 987 AD gene.

Transcripts

RefSeq

Gene	Transcript	HGVSc	HGVSp	Effect	#exon/exons	MANE	Protein	UniProt
APC	NM_000038.6 linkuse as main transcript	c.5265G>A	p.Ala1755=	synonymous_variant	16/16	ENST00000257430.9	NP_000029.2

Ensembl

Gene	Transcript	HGVSc	HGVSp	Effect	#exon/exons	TSL	MANE	Protein	Appris	UniProt
APC	ENST00000257430.9 linkuse as main transcript	c.5265G>A	p.Ala1755=	synonymous_variant	16/16	5	NM_000038.6	ENSP00000257430	P1	P25054-1

Frequencies

GnomAD3 genomes

AF:

0.00648

AC:

986

AN:

152140

Hom.:

Cov.:

show subpopulations

Gnomad AFR

AF:

0.00901

Gnomad AMI

AF:

0.00

Gnomad AMR

AF:

0.00386

Gnomad ASJ

AF:

0.00461

Gnomad EAS

AF:

0.000193

Gnomad SAS

AF:

0.00248

Gnomad FIN

AF:

0.000848

Gnomad MID

AF:

0.00949

Gnomad NFE

AF:

0.00744

Gnomad OTH

AF:

0.00335

GnomAD3 exomes

AF:

0.00462

AC:

1157

AN:

250476

Hom.:

AF XY:

0.00461

AC XY:

624

AN XY:

135498

show subpopulations

Gnomad AFR exome

AF:

0.00848

Gnomad AMR exome

AF:

0.00408

Gnomad ASJ exome

AF:

0.00508

Gnomad EAS exome

AF:

0.00

Gnomad SAS exome

AF:

0.00150

Gnomad FIN exome

AF:

0.000647

Gnomad NFE exome

AF:

0.00647

Gnomad OTH exome

AF:

0.00606

GnomAD4 exome

AF:

0.00756

AC:

11056

AN:

1461792

Hom.:

Cov.:

AF XY:

0.00731

AC XY:

5317

AN XY:

727200

show subpopulations

Gnomad4 AFR exome

AF:

0.00977

Gnomad4 AMR exome

AF:

0.00400

Gnomad4 ASJ exome

AF:

0.00520

Gnomad4 EAS exome

AF:

0.0000504

Gnomad4 SAS exome

AF:

0.00195

Gnomad4 FIN exome

AF:

0.000824

Gnomad4 NFE exome

AF:

0.00863

Gnomad4 OTH exome

AF:

0.00884

GnomAD4 genome

AF:

0.00648

AC:

987

AN:

152258

Hom.:

Cov.:

AF XY:

0.00564

AC XY:

420

AN XY:

74446

show subpopulations

Gnomad4 AFR

AF:

0.00900

Gnomad4 AMR

AF:

0.00386

Gnomad4 ASJ

AF:

0.00461

Gnomad4 EAS

AF:

0.000193

Gnomad4 SAS

AF:

0.00249

Gnomad4 FIN

AF:

0.000848

Gnomad4 NFE

AF:

0.00744

Gnomad4 OTH

AF:

0.00331

Alfa

AF:

0.00556

Hom.:

Bravo

AF:

0.00702

Asia WGS

AF:

0.000866

AC:

AN:

3478

EpiCase

AF:

0.00742

EpiControl

AF:

0.00640

ClinVar

Significance: Benign/Likely benign

Submissions summary: Benign:25

Revision: criteria provided, multiple submitters, no conflicts

LINK: link

Submissions by phenotype

not specified

Benign:12

Benign, no assertion criteria provided	clinical testing	Laboratory for Molecular Medicine, Mass General Brigham Personalized Medicine	Mar 01, 2008	- -
Likely benign, criteria provided, single submitter	clinical testing	Center for Genomic Medicine, Rigshospitalet, Copenhagen University Hospital	Aug 15, 2023	- -
Benign, criteria provided, single submitter	clinical testing	PreventionGenetics, part of Exact Sciences	-	- -
Benign, no assertion criteria provided	clinical testing	Clinical Genetics DNA and cytogenetics Diagnostics Lab, Erasmus MC, Erasmus Medical Center	-	- -
Benign, criteria provided, single submitter	clinical testing	Genetic Services Laboratory, University of Chicago	Aug 01, 2018	- -
Benign, criteria provided, single submitter	clinical testing	GeneDx	Oct 10, 2013	This variant is considered likely benign or benign based on one or more of the following criteria: it is a conservative change, it occurs at a poorly conserved position in the protein, it is predicted to be benign by multiple in silico algorithms, and/or has population frequency not consistent with disease. -
Benign, no assertion criteria provided	clinical testing	Genome Diagnostics Laboratory, Amsterdam University Medical Center	-	- -
Benign, no assertion criteria provided	clinical testing	Laboratory of Diagnostic Genome Analysis, Leiden University Medical Center (LUMC)	-	- -
Benign, no assertion criteria provided	clinical testing	Clinical Genetics, Academic Medical Center	-	- -
Benign, criteria provided, single submitter	clinical testing	Eurofins Ntd Llc (ga)	Dec 03, 2014	- -
Benign, no assertion criteria provided	clinical testing	Clinical Genetics Laboratory, Department of Pathology, Netherlands Cancer Institute	-	- -
Benign, no assertion criteria provided	clinical testing	Department of Pathology and Laboratory Medicine, Sinai Health System	-	The APC p.Ala1755Ala variant is not expected to have clinical significance because it does not alter an amino acid residue, is not located near a splice junction, and is listed in dbSNP (rs34506289) with a minor allele frequency (MAF) score of 0.004, having been observed in 9/2250 chromosomes (1000 Genomes). It was reported in 3/132 proband chromosomes of individuals with multiple colorectal adenomas and carcinomas, familial adenomatous polyposis (FAP) and sporadic polyposis, and also observed in 2/100 control chromosomes evaluated (Al-Tassan 2002, Hadjisavvas 2006, Kanter-Smoler 2006). In the latter study, the variant was found in the proband and his healthy sister along with the FAP-modifying polymorphism p.E1317Q, while his disease-affected brother did not harbour either variants (Kanter-Smoler 2006). These observations increase the likelihood that the variant is of little or no clinical significance. The variant was also reported in the Exome Variant Server and LOVD databases. This variant is classified as benign. -

not provided

Benign:5

Benign, criteria provided, single submitter	clinical testing	ARUP Laboratories, Molecular Genetics and Genomics, ARUP Laboratories	Nov 22, 2023	- -
Likely benign, no assertion criteria provided	clinical testing	Joint Genome Diagnostic Labs from Nijmegen and Maastricht, Radboudumc and MUMC+	-	- -
Likely benign, criteria provided, single submitter	clinical testing	Institute for Clinical Genetics, University Hospital TU Dresden, University Hospital TU Dresden	Nov 03, 2021	- -
Benign, criteria provided, single submitter	clinical testing	CeGaT Center for Human Genetics Tuebingen	Aug 01, 2024	APC: BP4, BP7, BS1, BS2 -
Likely benign, criteria provided, single submitter	not provided	Breakthrough Genomics, Breakthrough Genomics	-	- -

Hereditary cancer-predisposing syndrome

Benign:5

Benign, criteria provided, single submitter	clinical testing	Institute for Biomarker Research, Medical Diagnostic Laboratories, L.L.C.	Jun 02, 2023	- -
Likely benign, no assertion criteria provided	clinical testing	True Health Diagnostics	Aug 11, 2017	- -
Benign, criteria provided, single submitter	clinical testing	Color Diagnostics, LLC DBA Color Health	Mar 17, 2016	- -
Benign, criteria provided, single submitter	clinical testing	Ambry Genetics	Nov 24, 2014	This alteration is classified as benign based on a combination of the following: seen in unaffected individuals, population frequency, intact protein function, lack of segregation with disease, co-occurrence, RNA analysis, in silico models, amino acid conservation, lack of disease association in case-control studies, and/or the mechanism of disease or impacted region is inconsistent with a known cause of pathogenicity. -
Benign, criteria provided, single submitter	curation	Sema4, Sema4	Jul 28, 2020	- -

Familial adenomatous polyposis 1

Benign:2

Benign, criteria provided, single submitter	clinical testing	Labcorp Genetics (formerly Invitae), Labcorp	Feb 01, 2024	- -
Benign, criteria provided, single submitter	clinical testing	Myriad Genetics, Inc.	Apr 01, 2024	This variant is considered benign. This variant is a silent/synonymous amino acid change and it is not expected to impact splicing. -

APC-Associated Polyposis Disorders

Benign:1

Benign, criteria provided, single submitter

clinical testing

Illumina Laboratory Services, Illumina

Jan 12, 2018

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

-0.80

CADD

Benign

8.0

DANN

Benign

0.75

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

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