chr5-112707718-A-T

Variant names:

Variant summary

Our verdict is Likely pathogenic. The variant received 6 ACMG points: 6P and 0B. PM2PP3_Strong

The NM_001407447.1(APC):c.-183A>T variant causes a 5 prime UTR premature start codon gain change involving the alteration of a non-conserved nucleotide. The variant allele was found at a frequency of 0.00000365 in 1,370,256 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 Uncertain significance (★★).

Frequency

Genomes: 𝑓 0.000013 ( 0 hom., cov: 32)

Exomes 𝑓: 0.0000025 ( 0 hom. )

Consequence

APC
NM_001407447.1 5_prime_UTR_premature_start_codon_gain

Scores

Clinical Significance

Uncertain significance criteria provided, multiple submitters, no conflicts U:3

Conservation

PhyloP100: 3.31

Publications

6 publications found

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 Gene-Disease associations (from GenCC):

classic or attenuated familial adenomatous polyposis
Inheritance: AD Classification: DEFINITIVE Submitted by: ClinGen
desmoid tumor
Inheritance: AD Classification: DEFINITIVE, STRONG Submitted by: G2P, Genomics England PanelApp
familial adenomatous polyposis 1
Inheritance: AD Classification: DEFINITIVE, STRONG, MODERATE Submitted by: Genomics England PanelApp, Labcorp Genetics (formerly Invitae), Ambry Genetics
gastric adenocarcinoma and proximal polyposis of the stomach
Inheritance: AD Classification: DEFINITIVE, STRONG, SUPPORTIVE Submitted by: Ambry Genetics, Labcorp Genetics (formerly Invitae), ClinGen, Orphanet
sarcoma
Inheritance: AD Classification: MODERATE Submitted by: Genomics England PanelApp
APC-related attenuated familial adenomatous polyposis
Inheritance: AD Classification: SUPPORTIVE Submitted by: Orphanet
Turcot syndrome with polyposis
Inheritance: AD Classification: SUPPORTIVE Submitted by: Orphanet
Cenani-Lenz syndactyly syndrome
Inheritance: AR Classification: SUPPORTIVE Submitted by: Orphanet

APC links:

Genome browser will be placed here

ACMG classification

Classification was made for transcript

Our verdict: Likely_pathogenic. The variant received 6 ACMG points.

PM2

Very rare variant in population databases, with high coverage;

PP3

MetaRNN computational evidence supports a deleterious effect, 0.968

Transcripts

RefSeq

Gene	Transcript	HGVSc	Effect	Exon rank	Protein
APC	NM_001407447.1 link	c.-183A>T	5_prime_UTR_premature_start_codon_gain_variant	Exon 1 of 17	NP_001394376.1
APC	NM_001354895.2 link	c.-183A>T	5_prime_UTR_premature_start_codon_gain_variant	Exon 1 of 16	NP_001341824.1
APC	NM_001407452.1 link	c.-183A>T	5_prime_UTR_premature_start_codon_gain_variant	Exon 1 of 16	NP_001394381.1

Ensembl

Gene	Transcript	HGVSc	HGVSp	Effect	Exon rank	TSL	Protein
APC	ENST00000713636.1 link	n.-183A>T		5_prime_UTR_premature_start_codon_gain_variant	Exon 1 of 17		ENSP00000518937.1
APC	ENST00000507379.6 link	c.1A>T	p.Met1?	initiator_codon_variant	Exon 1 of 14	2	ENSP00000423224.2
APC	ENST00000505350.2 link	n.1A>T		non_coding_transcript_exon_variant	Exon 1 of 16	3	ENSP00000481752.1

Frequencies

GnomAD3 genomes

AF:

0.0000132

AC:

AN:

151926

Hom.:

Cov.:

show subpopulations

Gnomad AFR

AF:

0.00

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:

0.0000294

Gnomad OTH

AF:

0.00

GnomAD2 exomes

AF:

0.00

AC:

AN:

136660

AF XY:

0.00

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 FIN exome

AF:

0.00

Gnomad NFE exome

AF:

0.00

Gnomad OTH exome

AF:

0.00

GnomAD4 exome

AF:

0.00000246

AC:

AN:

1218330

Hom.:

Cov.:

AF XY:

0.00000168

AC XY:

AN XY:

595214

show subpopulations

African (AFR)

AF:

0.00

AC:

AN:

28294

American (AMR)

AF:

0.00

AC:

AN:

30764

Ashkenazi Jewish (ASJ)

AF:

0.00

AC:

AN:

21050

East Asian (EAS)

AF:

0.00

AC:

AN:

24238

South Asian (SAS)

AF:

0.00

AC:

AN:

76906

European-Finnish (FIN)

AF:

0.00

AC:

AN:

13132

Middle Eastern (MID)

AF:

0.00

AC:

AN:

4894

European-Non Finnish (NFE)

AF:

0.00000309

AC:

AN:

970758

Other (OTH)

AF:

0.00

AC:

AN:

48294

Allele Balance Distribution

Red line indicates average allele balance

Average allele balance: 0.442

Heterozygous variant carriers

0.00

0.20

0.40

0.60

0.80

0.95

Allele balance

Age Distribution

Exome Het

Variant carriers

<30

30-35

35-40

40-45

45-50

50-55

55-60

60-65

65-70

70-75

75-80

>80

Age

GnomAD4 genome

AF:

0.0000132

AC:

AN:

151926

Hom.:

Cov.:

AF XY:

0.0000135

AC XY:

AN XY:

74194

show subpopulations

African (AFR)

AF:

0.00

AC:

AN:

41356

American (AMR)

AF:

0.00

AC:

AN:

15276

Ashkenazi Jewish (ASJ)

AF:

0.00

AC:

AN:

3464

East Asian (EAS)

AF:

0.00

AC:

AN:

5148

South Asian (SAS)

AF:

0.00

AC:

AN:

4814

European-Finnish (FIN)

AF:

0.00

AC:

AN:

10590

Middle Eastern (MID)

AF:

0.00

AC:

AN:

316

European-Non Finnish (NFE)

AF:

0.0000294

AC:

AN:

67966

Other (OTH)

AF:

0.00

AC:

AN:

2084

Allele Balance Distribution

Red line indicates average allele balance

Average allele balance: 0.500

Heterozygous variant carriers

0.00

0.20

0.40

0.60

0.80

0.95

Allele balance

Alfa

AF:

0.00

Hom.:

Bravo

AF:

0.00000378

ClinVar

Significance: Uncertain significance

Submissions summary: Uncertain:3

Revision: criteria provided, multiple submitters, no conflicts

LINK: link

Submissions by phenotype

Familial adenomatous polyposis 1

Uncertain:2

Jan 21, 2025

Labcorp Genetics (formerly Invitae), Labcorp

Significance:Uncertain significance

Review Status:criteria provided, single submitter

Collection Method:clinical testing

This variant occurs in a non-coding region of the APC gene. It does not change the encoded amino acid sequence of the APC protein. This variant is not present in population databases (gnomAD no frequency). This variant has not been reported in the literature in individuals affected with APC-related conditions. ClinVar contains an entry for this variant (Variation ID: 548848). Experimental studies and prediction algorithms are not available or were not evaluated, and the functional significance of this variant is currently unknown. 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. -

Jan 25, 2018

Counsyl

Significance:Uncertain significance

Review Status:no assertion criteria provided

Collection Method:clinical testing

This submission and the accompanying classification are no longer maintained by the submitter. For more information on current observations and classification, please contact variantquestions@myriad.com. -

not specified

Uncertain:1

Mar 04, 2025

Center for Genomic Medicine, Rigshospitalet, Copenhagen University Hospital

Significance:Uncertain significance

Review Status:criteria provided, single submitter

Collection Method:clinical testing

- -

Computational scores

Source: dbNSFP v4.3

Name

Calibrated prediction

Score

Prediction

BayesDel_addAF

Pathogenic

0.33

BayesDel_noAF

Pathogenic

0.24

CADD

Benign

(source)

DANN

Benign

0.91

Eigen

Uncertain

0.21

Eigen_PC

Uncertain

0.23

FATHMM_MKL

Uncertain

0.82

LIST_S2

Uncertain

0.90

MetaRNN

Pathogenic

0.97

MetaSVM

Uncertain

0.69

PhyloP100

3.3

PROVEAN

Benign

0.050

REVEL

Uncertain

0.59

Sift

Pathogenic

0.0

MutPred

0.89

Loss of catalytic residue at M1 (P = 0.0472);

MVP

0.91

ClinPred

0.89

GERP RS

4.0

PromoterAI

0.075

Neutral

(source)

Mutation Taster

=286/14

polymorphism

(source)

Splicing

Find out detailed SpliceAI scores and Pangolin per-transcript scores at spliceailookup.broadinstitute.org

Publications

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Variant summary

Frequency

Consequence

Scores

Clinical Significance

Conservation

Publications

ACMG classification

Transcripts

RefSeq

Ensembl

Frequencies

Age Distribution

ClinVar

Submissions by phenotype

Computational scores

Splicing

Publications

Other links and lift over