chr5-112838441-G-T

Variant names:

Variant summary

Our verdict is Benign. Variant got -7 ACMG points: 0P and 7B. BP4_ModerateBP6BS2

The NM_000038.6(APC):c.2847G>T(p.Met949Ile) variant causes a missense change involving the alteration of a non-conserved nucleotide. The variant allele was found at a frequency of 0.00007 in 1,614,178 control chromosomes in the GnomAD database, with no homozygous occurrence. In-silico tool predicts a benign outcome for this variant. 14/21 in silico tools predict a benign outcome for this variant. Variant has been reported in ClinVar as Conflicting classifications of pathogenicity (no stars). Another nucleotide change resulting in the same amino acid substitution has been previously reported as Benign in ClinVar. Another variant affecting the same amino acid position, but resulting in a different missense (i.e. M949L) has been classified as Uncertain significance.

Frequency

Genomes: 𝑓 0.00037 ( 0 hom., cov: 32)

Exomes 𝑓: 0.000038 ( 0 hom. )

Consequence

APC
NM_000038.6 missense

Scores

Clinical Significance

Conflicting classifications of pathogenicity criteria provided, conflicting classifications U:4B:8

Conservation

PhyloP100: 1.52

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 -7 ACMG points.

BP4

Computational evidence support a benign effect (MetaRNN=0.08934301).

BP6

Variant 5-112838441-G-T is Benign according to our data. Variant chr5-112838441-G-T is described in ClinVar as [Conflicting_classifications_of_pathogenicity]. Clinvar id is 161206.We mark this variant Likely_benign, oryginal submissions are: {Likely_benign=5, Benign=2, Uncertain_significance=3}.

BS2

High AC in GnomAd4 at 57 AD gene.

Transcripts

RefSeq

Gene	Transcript	HGVSc	HGVSp	Effect	Exon rank	MANE	Protein	UniProt
APC	NM_000038.6 link	c.2847G>T	p.Met949Ile	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.2847G>T	p.Met949Ile	missense_variant	Exon 16 of 16	5	NM_000038.6	ENSP00000257430.4		P25054-1
ENSG00000258864	ENST00000520401.1 link	n.228+9469G>T		intron_variant	Intron 3 of 7	3		ENSP00000454861.1		H3BNH8

Frequencies

GnomAD3 genomes

AF:

0.000375

AC:

AN:

152196

Hom.:

Cov.:

show subpopulations

Gnomad AFR

AF:

0.000724

Gnomad AMI

AF:

0.00

Gnomad AMR

AF:

0.00170

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:

0.000478

GnomAD3 exomes

AF:

0.0000478

AC:

AN:

250790

Hom.:

AF XY:

0.0000443

AC XY:

AN XY:

135534

show subpopulations

Gnomad AFR exome

AF:

0.000678

Gnomad AMR exome

AF:

0.00

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:

0.000164

GnomAD4 exome

AF:

0.0000383

AC:

AN:

1461864

Hom.:

Cov.:

AF XY:

0.0000344

AC XY:

AN XY:

727224

show subpopulations

Gnomad4 AFR exome

AF:

0.000986

Gnomad4 AMR exome

AF:

0.000224

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:

0.00000270

Gnomad4 OTH exome

AF:

0.000166

GnomAD4 genome

AF:

0.000374

AC:

AN:

152314

Hom.:

Cov.:

AF XY:

0.000524

AC XY:

AN XY:

74496

show subpopulations

Gnomad4 AFR

AF:

0.000722

Gnomad4 AMR

AF:

0.00170

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:

0.000473

Alfa

AF:

0.000270

Hom.:

Bravo

AF:

0.000661

ESP6500AA

AF:

0.00114

AC:

ESP6500EA

AF:

0.00

AC:

ExAC

AF:

0.0000494

AC:

ClinVar

Significance: Conflicting classifications of pathogenicity

Submissions summary: Uncertain:4Benign:8

Revision: criteria provided, conflicting classifications

LINK: link

Submissions by phenotype

Familial adenomatous polyposis 1

Uncertain:2Benign:2

Jul 02, 2018

Mendelics

Significance: Uncertain significance

Review Status: criteria provided, single submitter

Collection Method: clinical testing

- -

Feb 02, 2025

Labcorp Genetics (formerly Invitae), Labcorp

Significance: Benign

Review Status: criteria provided, single submitter

Collection Method: clinical testing

- -

Feb 17, 2023

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. -

Apr 14, 2016

Counsyl

Significance: Uncertain significance

Review Status: criteria provided, single submitter

Collection Method: clinical testing

- -

Hereditary cancer-predisposing syndrome

Uncertain:1Benign:2

Sep 17, 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. -

Dec 16, 2021

Sema4, Sema4

Significance: Uncertain significance

Review Status: criteria provided, single submitter

Collection Method: curation

- -

Sep 17, 2024

Color Diagnostics, LLC DBA Color Health

Significance: Likely benign

Review Status: criteria provided, single submitter

Collection Method: clinical testing

- -

not specified

Benign:2

Mar 04, 2025

Center for Genomic Medicine, Rigshospitalet, Copenhagen University Hospital

Significance: Likely benign

Review Status: criteria provided, single submitter

Collection Method: clinical testing

- -

Dec 13, 2021

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

Significance: Benign

Review Status: criteria provided, single submitter

Collection Method: clinical testing

Variant summary: APC c.2847G>T (p.Met949Ile) results in a conservative amino acid change in the encoded protein sequence. Four of five in-silico tools predict a benign effect of the variant on protein function. The variant allele was found at a frequency of 4.8e-05 in 250790 control chromosomes, predominantly at a frequency of 0.00068 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 9.5 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.2847G>T has been reported in the literature in at-least two individuals, one stated as affected with non-familial adenomatous polyposis and non MUTYH-associated polyposis (Azzopard_2008) and another with Ependymoma in a sequencing study of 1120 young cancer patients (Zhang_2015). These report(s) do not provide unequivocal conclusions about association of the variant with Familial Adenomatous Polyposis. At-least one co-occurrence with another pathogenic variant has been observed at our laboratory (BRCA2 c.8548_8551delGAAG, p.Glu2850fs), providing supporting evidence for a benign role. To our knowledge, no experimental evidence demonstrating an impact on protein function has been reported. Six clinical diagnostic laboratories have submitted clinical-significance assessments for this variant to ClinVar after 2014 without evidence for independent evaluation. Multiple laboratories reported the variant with conflicting assessments (benign, n=1; likely benign, n=3; VUS, n=2). Based on the evidence outlined above, the variant was classified as benign. -

Colorectal adenoma

Uncertain:1

Jun 01, 2014

CSER _CC_NCGL, University of Washington

Significance: Uncertain significance

Review Status: no assertion criteria provided

Collection Method: research

- -

not provided

Benign:1

Nov 04, 2020

GeneDx

Significance: Likely benign

Review Status: criteria provided, single submitter

Collection Method: clinical testing

This variant is associated with the following publications: (PMID: 25637381, 21859464, 24055113, 18199528, 26991699) -

APC-related disorder

Benign:1

Feb 04, 2024

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

0.13

BayesDel_addAF

Benign

-0.034

BayesDel_noAF

Uncertain

0.060

CADD

Benign

DANN

Benign

0.94

DEOGEN2

Uncertain

0.54

.;D;D;T

Eigen

Benign

-0.35

Eigen_PC

Benign

-0.16

FATHMM_MKL

Pathogenic

0.98

LIST_S2

Benign

0.83

T;.;T;T

M_CAP

Benign

0.030

MetaRNN

Benign

0.089

T;T;T;T

MetaSVM

Benign

-0.37

MutationAssessor

Benign

0.69

.;N;N;.

PrimateAI

Benign

0.37

PROVEAN

Benign

-0.090

N;N;N;N

REVEL

Uncertain

0.47

Sift

Benign

0.13

T;T;T;T

Sift4G

Benign

0.29

T;T;T;T

Polyphen

0.0

.;B;B;.

Vest4

0.66, 0.28

MutPred

0.75

.;Loss of helix (P = 0.0017);Loss of helix (P = 0.0017);Loss of helix (P = 0.0017);

MVP

0.98

ClinPred

0.024

GERP RS

3.1

Varity_R

0.071

gMVP

0.24

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