rs371085910

Positions:

Variant summary

Our verdict is Likely benign. Variant got -2 ACMG points: 3P and 5B. PM1PP3BP6BS2

The NM_000038.6(APC):c.449A>G(p.Lys150Arg) variant causes a missense change involving the alteration of a conserved nucleotide. The variant allele was found at a frequency of 0.0000616 in 1,608,404 control chromosomes in the GnomAD database, with no homozygous occurrence. In-silico tool predicts a pathogenic outcome for this variant. Variant has been reported in ClinVar as Conflicting classifications of pathogenicity (no stars). Synonymous variant affecting the same amino acid position (i.e. K150K) has been classified as Likely benign.

Frequency

Genomes: 𝑓 0.000039 ( 0 hom., cov: 32)

Exomes 𝑓: 0.000064 ( 0 hom. )

Consequence

APC
NM_000038.6 missense

Scores

Clinical Significance

Conflicting classifications of pathogenicity criteria provided, conflicting classifications U:14B:3

Conservation

PhyloP100: 8.56

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:

APC (HGNC:):

APC links:

Genome browser will be placed here

ACMG classification

Classification made for transcript

Verdict is Likely_benign. Variant got -2 ACMG points.

PM1

In a helix (size 37) in uniprot entity APC_HUMAN there are 4 pathogenic changes around while only 0 benign (100%) in NM_000038.6

PP3

MetaRNN computational evidence supports a deleterious effect, 0.749

BP6

Variant 5-112775655-A-G is Benign according to our data. Variant chr5-112775655-A-G is described in ClinVar as [Conflicting_classifications_of_pathogenicity]. Clinvar id is 141928.We mark this variant Likely_benign, oryginal submissions are: {Likely_benign=3, Uncertain_significance=10}.

BS2

High AC in GnomAd4 at 6 AD gene.

Transcripts

RefSeq

Gene	Transcript	HGVSc	HGVSp	Effect	#exon/exons	MANE	Protein	UniProt
APC	NM_000038.6 linkuse as main transcript	c.449A>G	p.Lys150Arg	missense_variant	5/16	ENST00000257430.9	NP_000029.2	P25054-1Q4LE70

Ensembl

Gene	Transcript	HGVSc	HGVSp	Effect	#exon/exons	TSL	MANE	Protein	Appris	UniProt
APC	ENST00000257430.9 linkuse as main transcript	c.449A>G	p.Lys150Arg	missense_variant	5/16	5	NM_000038.6	ENSP00000257430.4		P25054-1

Frequencies

GnomAD3 genomes

AF:

0.0000395

AC:

AN:

152058

Hom.:

Cov.:

show subpopulations

Gnomad AFR

AF:

0.0000241

Gnomad AMI

AF:

0.00

Gnomad AMR

AF:

0.00

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:

0.0000736

Gnomad OTH

AF:

0.00

GnomAD3 exomes

AF:

0.0000202

AC:

AN:

247824

Hom.:

AF XY:

0.0000299

AC XY:

AN XY:

133744

show subpopulations

Gnomad AFR exome

AF:

0.00

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:

0.0000356

Gnomad OTH exome

AF:

0.000165

GnomAD4 exome

AF:

0.0000639

AC:

AN:

1456346

Hom.:

Cov.:

AF XY:

0.0000552

AC XY:

AN XY:

724230

show subpopulations

Gnomad4 AFR exome

AF:

0.00

Gnomad4 AMR exome

AF:

0.00

Gnomad4 ASJ exome

AF:

0.00

Gnomad4 EAS exome

AF:

0.00

Gnomad4 SAS exome

AF:

0.0000237

Gnomad4 FIN exome

AF:

0.00

Gnomad4 NFE exome

AF:

0.0000793

Gnomad4 OTH exome

AF:

0.0000498

GnomAD4 genome

AF:

0.0000395

AC:

AN:

152058

Hom.:

Cov.:

AF XY:

0.0000269

AC XY:

AN XY:

74286

show subpopulations

Gnomad4 AFR

AF:

0.0000241

Gnomad4 AMR

AF:

0.00

Gnomad4 ASJ

AF:

0.00

Gnomad4 EAS

AF:

0.00

Gnomad4 SAS

AF:

0.00

Gnomad4 FIN

AF:

0.00

Gnomad4 NFE

AF:

0.0000736

Gnomad4 OTH

AF:

0.00

Alfa

AF:

0.0000861

Hom.:

Bravo

AF:

0.0000529

ESP6500AA

AF:

0.000227

AC:

ESP6500EA

AF:

0.00

AC:

ExAC

AF:

0.00000824

AC:

EpiCase

AF:

0.0000548

EpiControl

AF:

0.00

ClinVar

Significance: Conflicting classifications of pathogenicity

Submissions summary: Uncertain:14Benign:3

Revision: criteria provided, conflicting classifications

LINK: link

Submissions by phenotype

Familial adenomatous polyposis 1

Uncertain:4Benign:1

Uncertain significance, criteria provided, single submitter	clinical testing	St. Jude Molecular Pathology, St. Jude Children's Research Hospital	Aug 03, 2021	- -
Likely benign, criteria provided, single submitter	clinical testing	Myriad Genetics, Inc.	Feb 17, 2023	This variant is considered likely benign. This variant has been observed in conjunction with multiple pathogenic variants, reducing the likelihood this variant itself is pathogenic. -
Uncertain significance, criteria provided, single submitter	clinical testing	Counsyl	Dec 18, 2017	- -
Uncertain significance, criteria provided, single submitter	clinical testing	Baylor Genetics	Mar 27, 2024	- -
Uncertain significance, criteria provided, single submitter	clinical testing	Labcorp Genetics (formerly Invitae), Labcorp	Jan 16, 2024	This sequence change replaces lysine, which is basic and polar, with arginine, which is basic and polar, at codon 150 of the APC protein (p.Lys150Arg). This variant is present in population databases (rs371085910, gnomAD 0.005%). This missense change has been observed in individual(s) with clinical features of familial adenomatous polyposis (PMID: 18199528). ClinVar contains an entry for this variant (Variation ID: 141928). Advanced modeling of protein sequence and biophysical properties (such as structural, functional, and spatial information, amino acid conservation, physicochemical variation, residue mobility, and thermodynamic stability) performed at Invitae indicates that this missense variant is not expected to disrupt APC protein function with a negative predictive value of 95%. RNA analysis performed to evaluate the impact of this missense change on mRNA splicing indicates it does not significantly alter splicing (Invitae). In summary, the available evidence is currently insufficient to determine the role of this variant in disease. Therefore, it has been classified as a Variant of Uncertain Significance. -

Hereditary cancer-predisposing syndrome

Uncertain:3Benign:1

Uncertain significance, no assertion criteria provided	clinical testing	True Health Diagnostics	Sep 25, 2017	- -
Uncertain significance, criteria provided, single submitter	clinical testing	Color Diagnostics, LLC DBA Color Health	Dec 11, 2023	This missense variant replaces lysine with arginine at codon 150 of the APC protein. Computational prediction suggests that this variant may have deleterious impact on protein structure and function (internally defined REVEL score threshold >= 0.7, PMID: 27666373). To our knowledge, protein functional studies have not been performed for this variant. This variant has been reported in individuals affected with breast cancer, colorectal adenomas, and rhabdosarcoma in the literature (PMID: 18199528, 21859464, 26580448, 28503720). This variant has been identified in 6/279048 chromosomes in the general population by the Genome Aggregation Database (gnomAD). The available evidence is insufficient to determine the role of this variant in disease conclusively. Therefore, this variant is classified as a Variant of Uncertain Significance. -
Uncertain significance, criteria provided, single submitter	curation	Sema4, Sema4	Nov 01, 2021	- -
Likely benign, criteria provided, single submitter	clinical testing	Ambry Genetics	Apr 10, 2021	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. -

not specified

Uncertain:2Benign:1

Uncertain significance, criteria provided, single submitter	clinical testing	Women's Health and Genetics/Laboratory Corporation of America, LabCorp	Mar 23, 2018	Variant summary: APC c.449A>G (p.Lys150Arg) results in a conservative amino acid change in the encoded protein sequence. Three of five in-silico tools predict a benign effect of the variant on protein function. The variant allele was found at a frequency of 2.2e-05 in 273686 control chromosomes. This frequency is not higher than expected for a pathogenic variant in APC causing Familial Adenomatous Polyposis (2.2e-05 vs 7.1e-05), allowing no conclusion about variant significance. c.449A>G has been reported in the literature in individuals affected with breast cancer and colon colorectal adenomas (Azzopardi_2008, Rummel_2017). These reports do not provide unequivocal conclusions about an association of the variant with Familial Adenomatous Polyposis. To our knowledge, no experimental evidence demonstrating an impact on protein function has been reported. Five clinical diagnostic laboratories have submitted clinical-significance assessments for this variant to ClinVar after 2014 without evidence for independent evaluation. All laboratories classified the variant as uncertain significance. Based on the evidence outlined above, the variant was classified as uncertain significance. -
Uncertain significance, criteria provided, single submitter	clinical testing	Laboratory for Molecular Medicine, Mass General Brigham Personalized Medicine	May 22, 2020	proposed classification - variant undergoing re-assessment, contact laboratory -
Likely benign, criteria provided, single submitter	clinical testing	Center for Genomic Medicine, Rigshospitalet, Copenhagen University Hospital	Jul 31, 2024	- -

not provided

Uncertain:2

Uncertain significance, criteria provided, single submitter	clinical testing	GeneDx	Dec 18, 2022	Observed in individuals with a personal history of colorectal adenomas, breast cancer, or other cancers (Azzopardi et al., 2008; Minde et al., 2011; Zhang et al., 2015; Ballinger et al., 2016; Rummel et al., 2017); Not observed at significant frequency in large population cohorts (gnomAD); In silico analysis supports that this missense variant does not alter protein structure/function; In silico analysis is inconclusive as to whether the variant alters gene splicing. In the absence of RNA/functional studies, the actual effect of this sequence change is unknown.; This variant is associated with the following publications: (PMID: 25637381, 21859464, 18199528, 26580448, 27498913, 28152038, 28503720, 16454848, 12070164, 27535533, 11257105, 34301788) -
Uncertain significance, criteria provided, single submitter	clinical testing	Quest Diagnostics Nichols Institute San Juan Capistrano	Aug 15, 2024	The APC c.449A>G (p.Lys150Arg) variant has been reported in the published literature in individuals affected with colorectal adenomas (PMIDs: 18199528 (2008), 21859464 (2011)), early-onset breast cancer (PMID: 28503720 (2017)), and pediatric sarcomas (PMIDs: 26580448 (2015), 34301788 (2021)). The frequency of this variant in the general population, 0.000031 (4/127816 chromosomes (Genome Aggregation Database, http://gnomad.broadinstitute.org)), is uninformative in the assessment of its pathogenicity. Analysis of this variant using bioinformatics tools for the prediction of the effect of amino acid changes on protein structure and function yielded predictions that this variant is damaging. Based on the available information, we are unable to determine the clinical significance of this variant. -

Classic or attenuated familial adenomatous polyposis

Uncertain:1

Uncertain significance, criteria provided, single submitter

clinical testing

All of Us Research Program, National Institutes of Health

Aug 06, 2024

This missense variant replaces lysine with arginine at codon 150 of the APC protein. Computational prediction suggests that this variant may have deleterious impact on protein structure and function (internally defined REVEL score threshold >= 0.7, PMID: 27666373). To our knowledge, protein functional studies have not been performed for this variant. This variant has been reported in individuals affected with breast cancer, colorectal adenomas, and rhabdosarcoma in the literature (PMID: 18199528, 21859464, 26580448, 28503720). This variant has been identified in 6/279048 chromosomes in the general population by the Genome Aggregation Database (gnomAD). The available evidence is insufficient to determine the role of this variant in disease conclusively. Therefore, this variant is classified as a Variant of Uncertain Significance. -

APC-related disorder

Uncertain:1

Uncertain significance, no assertion criteria provided

clinical testing

PreventionGenetics, part of Exact Sciences

Apr 17, 2024

The APC c.449A>G variant is predicted to result in the amino acid substitution p.Lys150Arg. This variant has been reported in individuals with colorectal adenoma (Azzopardi et al. 2008. PubMed ID: 18199528; Table S1, Minde. 2011. PubMed ID: 21859464 ) and in a patient with invasive early-onset breast cancer (Rummel et al. 2017. PubMed ID: 28503720). This variant is reported in 0.0031% of alleles in individuals of European (Non-Finnish) descent in gnomAD and is listed in ClinVar as likely benign and uncertain significance (https://www.ncbi.nlm.nih.gov/clinvar/variation/141928/). At this time, the clinical significance of this variant is uncertain due to the absence of conclusive functional and genetic evidence. -

Colorectal adenoma

Uncertain:1

Uncertain significance, no assertion criteria provided

research

CSER _CC_NCGL, University of Washington

Jun 01, 2014

- -

Computational scores

Source: dbNSFP v4.3

Name

Calibrated prediction

Score

Prediction

AlphaMissense

Benign

0.091

BayesDel_addAF

Pathogenic

0.29

BayesDel_noAF

Pathogenic

0.31

CADD

Benign

DANN

Uncertain

1.0

DEOGEN2

Uncertain

0.55

.;D;D;T

Eigen

Uncertain

0.42

Eigen_PC

Uncertain

0.51

FATHMM_MKL

Pathogenic

0.99

LIST_S2

Uncertain

0.93

D;.;D;D

M_CAP

Uncertain

0.11

MetaRNN

Pathogenic

0.75

D;D;D;D

MetaSVM

Uncertain

0.68

MutationAssessor

Benign

0.64

.;N;N;.

PrimateAI

Uncertain

0.74

PROVEAN

Benign

-1.7

N;N;N;N

REVEL

Pathogenic

0.87

Sift

Benign

0.047

D;T;T;T

Sift4G

Benign

0.28

T;T;T;T

Polyphen

0.51

.;P;P;.

Vest4

0.73, 0.76

MVP

0.99

ClinPred

0.46

GERP RS

5.3

RBP_binding_hub_radar

0.0

RBP_regulation_power_radar

1.7

Varity_R

0.34

gMVP

0.33

Splicing

Name

Calibrated prediction

Score

Prediction

SpliceAI score (max)

0.24

Details are displayed if max score is > 0.2

DS_AL_spliceai

0.24

Position offset: -26

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