rs189807660

Positions:

Variant summary

Our verdict is Uncertain significance. Variant got 4 ACMG points: 8P and 4B. PVS1BS2

The NM_001407446.1(APC):c.1A>G(p.Met1?) variant causes a start lost change involving the alteration of a non-conserved nucleotide. The variant allele was found at a frequency of 0.0000336 in 1,370,374 control chromosomes in the GnomAD database, with no homozygous occurrence. Variant has been reported in ClinVar as Uncertain significance (★★).

Frequency

Genomes: 𝑓 0.000020 ( 0 hom., cov: 32)

Exomes 𝑓: 0.000035 ( 0 hom. )

Consequence

APC
NM_001407446.1 start_lost

Scores

Clinical Significance

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

Conservation

PhyloP100: 3.31

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:

Genome browser will be placed here

ACMG classification

Classification made for transcript

Verdict is Uncertain_significance. Variant got 4 ACMG points.

PVS1

Start lost variant, no new inframe start found.

BS2

High AC in GnomAdExome4 at 43 AD gene.

Transcripts

RefSeq

Gene	Transcript	HGVSc	HGVSp	Effect	#exon/exons
APC	NM_001407446.1 linkuse as main transcript	c.1A>G	p.Met1?	start_lost	1/16
APC	NM_001354897.2 linkuse as main transcript	c.1A>G	p.Met1?	start_lost	1/15
APC	NM_001127511.3 linkuse as main transcript	c.1A>G	p.Met1?	start_lost	1/14

Ensembl

Gene	Transcript	HGVSc	HGVSp	Effect	#exon/exons	TSL	Appris
APC	ENST00000507379.6 linkuse as main transcript	c.1A>G	p.Met1?	start_lost	1/14	2
APC	ENST00000509732.6 linkuse as main transcript	c.-19+69A>G		intron_variant		4	P1
APC	ENST00000505350.2 linkuse as main transcript	c.1A>G	p.Met1?	start_lost, NMD_transcript_variant	1/16	3

Frequencies

GnomAD3 genomes

AF:

0.0000197

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:

0.000389

Gnomad SAS

AF:

0.00

Gnomad FIN

AF:

0.00

Gnomad MID

AF:

0.00

Gnomad NFE

AF:

0.0000147

Gnomad OTH

AF:

0.00

GnomAD3 exomes

AF:

0.0000512

AC:

AN:

136660

Hom.:

AF XY:

0.0000673

AC XY:

AN XY:

74250

show subpopulations

Gnomad AFR exome

AF:

0.00

Gnomad AMR exome

AF:

0.00

Gnomad ASJ exome

AF:

0.00

Gnomad EAS exome

AF:

0.000286

Gnomad SAS exome

AF:

0.0000445

Gnomad FIN exome

AF:

0.00

Gnomad NFE exome

AF:

0.0000364

Gnomad OTH exome

AF:

0.000241

GnomAD4 exome

AF:

0.0000353

AC:

AN:

1218330

Hom.:

Cov.:

AF XY:

0.0000353

AC XY:

AN XY:

595214

show subpopulations

Gnomad4 AFR exome

AF:

0.00

Gnomad4 AMR exome

AF:

0.00

Gnomad4 ASJ exome

AF:

0.00

Gnomad4 EAS exome

AF:

0.000248

Gnomad4 SAS exome

AF:

0.0000260

Gnomad4 FIN exome

AF:

0.00

Gnomad4 NFE exome

AF:

0.0000340

Gnomad4 OTH exome

AF:

0.0000414

GnomAD4 genome

AF:

0.0000197

AC:

AN:

152044

Hom.:

Cov.:

AF XY:

0.0000269

AC XY:

AN XY:

74322

show subpopulations

Gnomad4 AFR

AF:

0.00

Gnomad4 AMR

AF:

0.00

Gnomad4 ASJ

AF:

0.00

Gnomad4 EAS

AF:

0.000389

Gnomad4 SAS

AF:

0.00

Gnomad4 FIN

AF:

0.00

Gnomad4 NFE

AF:

0.0000147

Gnomad4 OTH

AF:

0.00

Bravo

AF:

0.0000340

Asia WGS

AF:

0.000289

AC:

AN:

3478

ClinVar

Significance: Uncertain significance

Submissions summary: Uncertain:3

Revision: criteria provided, multiple submitters, no conflicts

LINK: link

Submissions by phenotype

Neoplasm of stomach;C0699790:Carcinoma of colon;C1851124:Desmoid disease, hereditary;C2239176:Hepatocellular carcinoma;C2713442:Familial adenomatous polyposis 1

Uncertain:1

Uncertain significance, criteria provided, single submitter

clinical testing

Fulgent Genetics, Fulgent Genetics

Oct 31, 2018

- -

Familial adenomatous polyposis 1

Uncertain:1

Uncertain significance, criteria provided, single submitter

clinical testing

Labcorp Genetics (formerly Invitae), Labcorp

Oct 26, 2023

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 present in population databases (rs189807660, gnomAD 0.03%). 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: 469802). 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. -

not provided

Uncertain:1

Uncertain significance, criteria provided, single submitter

clinical testing

ARUP Laboratories, Molecular Genetics and Genomics, ARUP Laboratories

Sep 08, 2023

The APC c.1A>G; p.Met1? variant (rs189807660) in transcript NM_001127511.3, also known as c.-30226A>G in transcript NM_000038.6, is not reported in the medical literature, to our knowledge, but is reported in ClinVar (Variation ID: 469802). This variant is found in the general population with an overall allele frequency of 0.005% (8/166,732 alleles) in the Genome Aggregation Database. This variant abolishes a translation initiation site in an alternate transcript of APC; however, no variants in this codon or the canonical initiation codon in transcript NM_000038.6 have been reported in affected individuals. Due to limited information, the clinical significance of this variant is uncertain at this time. -

Computational scores

Source: dbNSFP v4.3

Name

Calibrated prediction

Score

Prediction

BayesDel_addAF

Uncertain

0.075

BayesDel_noAF

Pathogenic

0.17

CADD

Benign

DANN

Uncertain

0.99

Eigen

Uncertain

0.21

Eigen_PC

Uncertain

0.23

FATHMM_MKL

Uncertain

0.81

LIST_S2

Uncertain

0.90

MetaRNN

Uncertain

0.63

MetaSVM

Uncertain

0.69

MutationTaster

Benign

1.0

PROVEAN

Benign

-0.040

REVEL

Uncertain

0.54

Sift

Pathogenic

0.0

MVP

0.89

ClinPred

0.90

GERP RS

4.0

Splicing

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