5-112838070-T-G

Variant names:

Variant summary

Our verdict is Benign. Variant got -9 ACMG points: 0P and 9B. BA1BP1

This summary comes from the ClinGen Evidence Repository: The c.2476T>G variant in APC is a missense variant predicted to cause a substitution of leucine by valine at amino acid position 826 (p.Leu826Val). The highest population minor allele frequency in gnomAD v2.1.1 is 0.1576% in the non-cancer African/African American population, which is higher than the ClinGen InSiGHT Hereditary Colorectal Cancer/Polyposis Variant Curation threshold (>0.1%) for BA1, and therefore meets this criterion (BA1). Additionally, APC is defined by the ClinGen InSiGHT Hereditary Colorectal Cancer/Polyposis Variant Curation Expert Panel as a gene for which primarily truncating variants are known to cause disease (BP1). Multiple lines of computational evidence suggest no splicing impact. In summary, this variant meets the criteria to be classified as Benign for FAP. ACMG/AMP criteria applied, as specified by the ClinGen/InSiGHT Hereditary Colorectal Cancer/Polyposis Expert Panel: BA1, BP1 (VCEP specifications version 1; date of approval: 12/12/2022). LINK:https://erepo.genome.network/evrepo/ui/classification/CA007509/MONDO:0021056/089

Frequency

Genomes: 𝑓 0.00046 ( 0 hom., cov: 32)

Exomes 𝑓: 0.000031 ( 0 hom. )

Consequence

APC
NM_000038.6 missense

Scores

Clinical Significance

Benign reviewed by expert panel B:14

Conservation

PhyloP100: 1.46

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:

ENSG00000258864 (HGNC:):

ENSG00000258864 links:

Genome browser will be placed here

ACMG classification

Classification made for transcript

Verdict is Benign. Variant got -9 ACMG points.

BP1

For more information check the summary or visit ClinGen Evidence Repository.

BA1

For more information check the summary or visit ClinGen Evidence Repository.

Transcripts

RefSeq

Gene	Transcript	HGVSc	HGVSp	Effect	Exon rank	MANE	Protein	UniProt
APC	NM_000038.6 link	c.2476T>G	p.Leu826Val	missense_variant	Exon 16 of 16	ENST00000257430.9	NP_000029.2	P25054-1Q4LE70

Ensembl

Gene	Transcript	HGVSc	HGVSp	Effect	Exon rank	TSL	MANE	Protein	Appris	UniProt
APC	ENST00000257430.9 link	c.2476T>G	p.Leu826Val	missense_variant	Exon 16 of 16	5	NM_000038.6	ENSP00000257430.4		P25054-1
ENSG00000258864	ENST00000520401.1 link	n.228+9098T>G		intron_variant	Intron 3 of 7	3		ENSP00000454861.1		H3BNH8

Frequencies

GnomAD3 genomes

AF:

0.000460

AC:

AN:

152224

Hom.:

Cov.:

show subpopulations

Gnomad AFR

AF:

0.00164

Gnomad AMI

AF:

0.00

Gnomad AMR

AF:

0.000131

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:

0.00

Gnomad OTH

AF:

0.00

GnomAD3 exomes

AF:

0.0000956

AC:

AN:

250976

Hom.:

AF XY:

0.000103

AC XY:

AN XY:

135732

show subpopulations

Gnomad AFR exome

AF:

0.00143

Gnomad AMR exome

AF:

0.0000289

Gnomad ASJ exome

AF:

0.00

Gnomad EAS exome

AF:

0.00

Gnomad SAS exome

AF:

0.00

Gnomad FIN exome

AF:

0.00

Gnomad NFE exome

AF:

0.00

Gnomad OTH exome

AF:

0.00

GnomAD4 exome

AF:

0.0000308

AC:

AN:

1461864

Hom.:

Cov.:

AF XY:

0.0000275

AC XY:

AN XY:

727234

show subpopulations

Gnomad4 AFR exome

AF:

0.00128

Gnomad4 AMR exome

AF:

0.00

Gnomad4 ASJ exome

AF:

0.00

Gnomad4 EAS exome

AF:

0.00

Gnomad4 SAS exome

AF:

0.00

Gnomad4 FIN exome

AF:

0.00

Gnomad4 NFE exome

AF:

0.00

Gnomad4 OTH exome

AF:

0.0000331

GnomAD4 genome

AF:

0.000459

AC:

AN:

152342

Hom.:

Cov.:

AF XY:

0.000470

AC XY:

AN XY:

74496

show subpopulations

Gnomad4 AFR

AF:

0.00164

Gnomad4 AMR

AF:

0.000131

Gnomad4 ASJ

AF:

0.00

Gnomad4 EAS

AF:

0.00

Gnomad4 SAS

AF:

0.00

Gnomad4 FIN

AF:

0.00

Gnomad4 NFE

AF:

0.00

Gnomad4 OTH

AF:

0.00

Alfa

AF:

0.0000601

Hom.:

Bravo

AF:

0.000389

ESP6500AA

AF:

0.00114

AC:

ESP6500EA

AF:

0.00

AC:

ExAC

AF:

0.000157

AC:

ClinVar

Significance: Benign

Submissions summary: Benign:14

Revision: reviewed by expert panel

LINK: link

Submissions by phenotype

Familial adenomatous polyposis 1

Benign:4

Feb 25, 2023

ClinGen InSiGHT Hereditary Colorectal Cancer/Polyposis Variant Curation Expert Panel

Significance: Benign

Review Status: reviewed by expert panel

Collection Method: curation

The c.2476T>G variant in APC is a missense variant predicted to cause a substitution of leucine by valine at amino acid position 826 (p.Leu826Val). The highest population minor allele frequency in gnomAD v2.1.1 is 0.1576% in the non-cancer African/African American population, which is higher than the ClinGen InSiGHT Hereditary Colorectal Cancer/Polyposis Variant Curation threshold (>0.1%) for BA1, and therefore meets this criterion (BA1). Additionally, APC is defined by the ClinGen InSiGHT Hereditary Colorectal Cancer/Polyposis Variant Curation Expert Panel as a gene for which primarily truncating variants are known to cause disease (BP1). Multiple lines of computational evidence suggest no splicing impact. In summary, this variant meets the criteria to be classified as Benign for FAP. ACMG/AMP criteria applied, as specified by the ClinGen/InSiGHT Hereditary Colorectal Cancer/Polyposis Expert Panel: BA1, BP1 (VCEP specifications version 1; date of approval: 12/12/2022). -

Jan 23, 2025

Labcorp Genetics (formerly Invitae), Labcorp

Significance: Likely benign

Review Status: criteria provided, single submitter

Collection Method: clinical testing

- -

Mar 14, 2024

Myriad Genetics, Inc.

Significance: Likely benign

Review Status: criteria provided, single submitter

Collection Method: clinical testing

This variant is considered likely benign. This variant has been observed at a population frequency that is significantly greater than expected given the associated disease prevalence and penetrance. -

Aug 05, 2021

St. Jude Molecular Pathology, St. Jude Children's Research Hospital

Significance: Likely benign

Review Status: criteria provided, single submitter

Collection Method: clinical testing

The APC c.2476T>G (p.Leu826Val) missense change has a maximum subpopulation frequency of 0.16% in gnomAD v2.1.1 (https://gnomad.broadinstitute.org/variant/5-112173767-T-G). This is higher than the reported incidence of APC-related familial adenomatous polyposis (BS1). Several in silico tools predict a benign effect of this variant on protein function (BP4), but to our knowledge these predictions have not been confirmed by functional assays. This variant has been reported in two females of African ancestry with breast cancer (PMID: 25186627). To our knowledge, this variant has not been reported in individuals with APC-related familial adenomatous polyposis. In summary, this variant meets criteria to be classified as likely benign based on the ACMG/AMP criteria: BS1, BP4. -

Hereditary cancer-predisposing syndrome

Benign:3

Dec 03, 2020

Sema4, Sema4

Significance: Likely benign

Review Status: criteria provided, single submitter

Collection Method: curation

- -

Aug 29, 2018

Ambry Genetics

Significance: Likely benign

Review Status: criteria provided, single submitter

Collection Method: clinical testing

This alteration is classified as likely 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. -

Mar 21, 2016

Color Diagnostics, LLC DBA Color Health

Significance: Benign

Review Status: criteria provided, single submitter

Collection Method: clinical testing

- -

not specified

Benign:2

Apr 29, 2021

Genetic Services Laboratory, University of Chicago

Significance: Benign

Review Status: criteria provided, single submitter

Collection Method: clinical testing

- -

Mar 01, 2021

Women's Health and Genetics/Laboratory Corporation of America, LabCorp

Significance: Likely benign

Review Status: criteria provided, single submitter

Collection Method: clinical testing

Variant summary: APC c.2476T>G (p.Leu826Val) results in a conservative amino acid change in the encoded protein sequence. Five of five in-silico tools predict a benign effect of the variant on protein function. The variant allele was found at a frequency of 9.6e-05 in 250976 control chromosomes, predominantly at a frequency of 0.0014 within the African or African-American subpopulation in the gnomAD database. The observed variant frequency within African or African-American control individuals in the gnomAD database is approximately 20 fold of the estimated maximal expected allele frequency for a pathogenic variant in APC causing Familial Adenomatous Polyposis phenotype (7.1e-05), strongly suggesting that the variant is a benign polymorphism found primarily in populations of African or African-American origin. c.2476T>G has been reported in the literature in individuals affected with breast cancer and pediatric cancer (Tung_2014, Zhang_2015). These reports do not provide unequivocal conclusions about association of the variant with Familial Adenomatous Polyposis. To our knowledge, no experimental evidence demonstrating an impact on protein function has been reported. Five ClinVar submitters (evaluation after 2014) cite the variant as uncertain significance (n=1), likely benign (n=3) and benign (n=1). Based on the evidence outlined above, the variant was classified as likely benign. -

not provided

Benign:2

Jun 09, 2021

GeneDx

Significance: Likely benign

Review Status: criteria provided, single submitter

Collection Method: clinical testing

This variant is associated with the following publications: (PMID: 26580448, 25186627) -

Dec 19, 2022

Quest Diagnostics Nichols Institute San Juan Capistrano

Significance: Benign

Review Status: criteria provided, single submitter

Collection Method: clinical testing

- -

Gastric cancer;C0346629:Colorectal cancer;C1851124:Desmoid disease, hereditary;C2239176:Hepatocellular carcinoma;C2713442:Familial adenomatous polyposis 1;C4749917:Gastric adenocarcinoma and proximal polyposis of the stomach

Benign:1

Aug 04, 2021

Fulgent Genetics, Fulgent Genetics

Significance: Likely benign

Review Status: criteria provided, single submitter

Collection Method: clinical testing

- -

Classic or attenuated familial adenomatous polyposis

Benign:1

Feb 05, 2024

All of Us Research Program, National Institutes of Health

Significance: Benign

Review Status: criteria provided, single submitter

Collection Method: clinical testing

- -

APC-related disorder

Benign:1

Jun 07, 2021

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). -

Computational scores

Source: dbNSFP v4.3

Name

Calibrated prediction

Score

Prediction

AlphaMissense

Benign

0.092

BayesDel_addAF

Benign

-0.31

BayesDel_noAF

Benign

-0.22

CADD

Benign

DANN

Benign

0.91

DEOGEN2

Uncertain

0.70

.;D;D;D

Eigen

Benign

-0.33

Eigen_PC

Benign

-0.20

FATHMM_MKL

Uncertain

0.91

LIST_S2

Uncertain

0.86

D;.;D;D

M_CAP

Benign

0.019

MetaRNN

Benign

0.035

T;T;T;T

MetaSVM

Uncertain

-0.11

MutationAssessor

Benign

1.5

.;L;L;.

PrimateAI

Uncertain

0.61

PROVEAN

Benign

-0.73

N;N;N;N

REVEL

Benign

0.21

Sift

Benign

0.056

T;D;D;T

Sift4G

Benign

0.23

T;T;T;T

Polyphen

0.0050

.;B;B;.

Vest4

0.12, 0.11

MVP

0.86

ClinPred

0.031

GERP RS

2.5

Varity_R

0.073

gMVP

0.50

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