Variant rs761133356 details in Genebe, Genetics Data Aggregator

Variant summary

Our verdict is Uncertain significance. Variant got 2 ACMG points: 2P and 0B. PM2

The NM_000038.6(APC):c.7667C>T(p.Ser2556Leu) variant causes a missense change involving the alteration of a conserved nucleotide. The variant allele was found at a frequency of 0.00000274 in 1,461,386 control chromosomes in the GnomAD database, with no homozygous occurrence. Variant has been reported in ClinVar as Uncertain significance (★★).

Frequency

Genomes: not found (cov: 32)

Exomes 𝑓: 0.0000027 ( 0 hom. )

Consequence

APC
NM_000038.6 missense

Scores

Clinical Significance

Uncertain significance criteria provided, multiple submitters, no conflicts U:7

Conservation

PhyloP100: 7.38

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 Uncertain_significance. Variant got 2 ACMG points.

PM2

Very rare variant in population databases, with high coverage;

Transcripts

RefSeq

Gene	Transcript	HGVSc	HGVSp	Effect	#exon/exons	MANE	Protein	UniProt
APC	NM_000038.6 linkuse as main transcript	c.7667C>T	p.Ser2556Leu	missense_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.7667C>T	p.Ser2556Leu	missense_variant	16/16	5	NM_000038.6	ENSP00000257430	P1	P25054-1

Frequencies

GnomAD3 genomes

Cov.:

GnomAD3 exomes

AF:

0.0000120

AC:

AN:

250832

Hom.:

AF XY:

0.0000221

AC XY:

AN XY:

135534

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:

0.0000265

Gnomad OTH exome

AF:

0.00

GnomAD4 exome

AF:

0.00000274

AC:

AN:

1461386

Hom.:

Cov.:

AF XY:

0.00000413

AC XY:

AN XY:

727040

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:

0.00

Gnomad4 FIN exome

AF:

0.00

Gnomad4 NFE exome

AF:

0.00000270

Gnomad4 OTH exome

AF:

0.0000166

GnomAD4 genome

Cov.:

ExAC

AF:

0.0000165

AC:

EpiCase

AF:

0.00

EpiControl

AF:

0.0000593

ClinVar

Significance: Uncertain significance

Submissions summary: Uncertain:7

Revision: criteria provided, multiple submitters, no conflicts

LINK: link

Submissions by phenotype

Familial adenomatous polyposis 1

Uncertain:3

Uncertain significance, criteria provided, single submitter	clinical testing	Myriad Genetics, Inc.	Feb 13, 2023	This variant is classified as a variant of uncertain significance as there is insufficient evidence to determine its impact on protein function and/or cancer risk. -
Uncertain significance, criteria provided, single submitter	clinical testing	Counsyl	Feb 23, 2018	- -
Uncertain significance, criteria provided, single submitter	clinical testing	Labcorp Genetics (formerly Invitae), Labcorp	Sep 07, 2022	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. Algorithms developed to predict the effect of missense changes on protein structure and function (SIFT, PolyPhen-2, Align-GVGD) all suggest that this variant is likely to be disruptive. ClinVar contains an entry for this variant (Variation ID: 470103). This missense change has been observed in individual(s) with colorectal cancer (PMID: 28135145). This variant is present in population databases (rs761133356, gnomAD 0.002%). This sequence change replaces serine, which is neutral and polar, with leucine, which is neutral and non-polar, at codon 2556 of the APC protein (p.Ser2556Leu). -

Hereditary cancer-predisposing syndrome

Uncertain:2

Uncertain significance, criteria provided, single submitter	curation	Sema4, Sema4	Mar 01, 2022	- -
Uncertain significance, criteria provided, single submitter	clinical testing	Ambry Genetics	Apr 10, 2023	The p.S2556L variant (also known as c.7667C>T), located in coding exon 15 of the APC gene, results from a C to T substitution at nucleotide position 7667. The serine at codon 2556 is replaced by leucine, an amino acid with dissimilar properties. This variant has been reported in an individual affected with colorectal cancer (Yurgelun MB et al. J Clin Oncol, 2017 Apr;35:1086-1095). This variant was also detected in 1/113 Italian non-BRCA patients with a personal and/or familial history of breast cancer, ovarian cancer, and/or pancreatic cancer (Germani A et al. J Clin Med, 2020 Sep;9). This amino acid position is well conserved in available vertebrate species. In addition, in silico predictors for this gene do not accurately predict pathogenicity. Since supporting evidence is limited at this time, the clinical significance of this alteration remains unclear. -

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

Sep 17, 2023

This missense variant replaces serine with leucine at codon 2556 of the APC protein. Computational prediction suggests that this variant may not impact protein structure and function (internally defined REVEL score threshold <= 0.5, PMID: 27666373). To our knowledge, functional studies have not been reported for this variant. This variant has been reported in an individual affected with colorectal cancer and an individual affected with breast cancer (PMID: 28135145, 32957588). This variant has been identified in 3/250832 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

Mar 18, 2024

The APC c.7667C>T variant is predicted to result in the amino acid substitution p.Ser2556Leu. This variant was reported in an individual with colorectal cancer, who also carried a rare variant in BRIP1 gene (see subject ID COLB5737-3 in Table A4, Yurgelun et al. 2017. PubMed ID: 28135145). This variant is reported in 0.0027% of alleles in individuals of European (Non-Finnish) descent in gnomAD. In ClinVar, this variant is interpreted as uncertain (https://www.ncbi.nlm.nih.gov/clinvar/variation/470103/). At this time, the clinical significance of this variant is uncertain due to the absence of conclusive functional and genetic evidence. -

Computational scores

Source: dbNSFP v4.3

Name

Calibrated prediction

Score

Prediction

AlphaMissense

Uncertain

0.47

BayesDel_addAF

Pathogenic

0.24

BayesDel_noAF

Uncertain

0.12

CADD

Pathogenic

DANN

Uncertain

1.0

DEOGEN2

Uncertain

0.53

D;D

Eigen

Pathogenic

0.79

Eigen_PC

Pathogenic

0.82

FATHMM_MKL

Uncertain

0.95

LIST_S2

Pathogenic

0.98

.;D

M_CAP

Uncertain

0.13

MetaRNN

Uncertain

0.73

D;D

MetaSVM

Uncertain

0.36

MutationAssessor

Uncertain

2.2

M;M

MutationTaster

Benign

1.0

D;D;D

PrimateAI

Uncertain

0.75

PROVEAN

Uncertain

-2.5

N;N

REVEL

Uncertain

0.48

Sift

Uncertain

0.0010

D;D

Sift4G

Uncertain

0.0080

D;D

Polyphen

1.0

D;D

Vest4

0.86

MutPred

0.35

Gain of catalytic residue at S2556 (P = 0.0042);Gain of catalytic residue at S2556 (P = 0.0042);

MVP

0.89

ClinPred

0.91

GERP RS

6.1

Varity_R

0.38

gMVP

0.53

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