NM_001407446.1:c.-149A>C

Variant names:

• chr5-112707569-A-C
• rs922676017
• NM_001407446.1:c.-149A>C

Variant summary

Our verdict is Uncertain significance. The variant received 0 ACMG points: 2P and 2B. PM2 BP4_Moderate

The NM_001407446.1(APC):​c.-149A>C variant causes a 5 prime UTR change involving the alteration of a non-conserved nucleotide. The variant allele was found at a frequency of 0.00000474 in 632,524 control chromosomes in the GnomAD database, with no homozygous occurrence. In-silico tool predicts a benign outcome for this variant. Variant has been reported in ClinVar as Uncertain significance (★).

• Frequency:
  • Genomes: not found (cov: 33)
  • Exomes 𝑓: 0.0000047 (0 hom.)
• Consequence: APC NM_001407446.1 5_prime_UTR
• Clinical Significance: Uncertain significance criteria provided, single submitter U:1
• Conservation: PhyloP100: 3.28
• Publications: 0 publications found

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

ACMG classification

Our verdict: Uncertain_significance. The variant received 0 ACMG points.

• PM2: Very rare variant in population databases, with high coverage
• BP4: Computational evidence support a benign effect (BayesDel_noAF=-0.21).

Variant Effect in Transcripts

ACMG analysis was done for transcript: NM_001407446.1. You can select a different transcript below to see updated ACMG assignments.

RefSeq Transcripts

Selected	Gene	Transcript	Tags	HGVSc	HGVSp	Effect	Exon Rank	Protein	UniProt
	APC	NM_001407446.1		c.-149A>C		5_prime_UTR	Exon 1 of 16	NP_001394375.1
	APC	NM_001407447.1		c.-332A>C		5_prime_UTR	Exon 1 of 17	NP_001394376.1
	APC	NM_001407448.1		c.-99A>C		5_prime_UTR	Exon 1 of 17	NP_001394377.1

Ensembl Transcripts

Selected	Gene	Transcript	Tags	HGVSc	HGVSp	Effect	Exon Rank	Protein	UniProt
	APC	ENST00000951167.1		c.-99A>C		5_prime_UTR	Exon 1 of 17	ENSP00000621226.1
	APC	ENST00000509732.6	TSL:4	c.-99A>C		5_prime_UTR	Exon 1 of 16	ENSP00000426541.2
	APC	ENST00000507379.6	TSL:2	c.-149A>C		5_prime_UTR	Exon 1 of 14	ENSP00000423224.2

Frequencies

GnomAD3 genomes Cov.: 33

GnomAD4 exome AF: 0.00000474 AC: 3 AN: 632524 Hom.: 0 Cov.: 9 AF XY: 0.00000948 AC XY: 3 AN XY: 316336

African (AFR) AF: 0.00 AC: 0 AN: 16094

American (AMR) AF: 0.00 AC: 0 AN: 18968

Ashkenazi Jewish (ASJ) AF: 0.00 AC: 0 AN: 12740

East Asian (EAS) AF: 0.00 AC: 0 AN: 20800

South Asian (SAS) AF: 0.00 AC: 0 AN: 54868

European-Finnish (FIN) AF: 0.00 AC: 0 AN: 9948

Middle Eastern (MID) AF: 0.00 AC: 0 AN: 2806

European-Non Finnish (NFE) AF: 0.00000641 AC: 3 AN: 468212

Other (OTH) AF: 0.00 AC: 0 AN: 28088

GnomAD4 genome Cov.: 33

Alfa AF: 0.00 Hom.: 0

Bravo AF: 0.00000756

ClinVar

ClinVar submissions as Germline

Significance: Uncertain significance

Revision: criteria provided, single submitter

Pathogenic	VUS	Benign	Condition
-	1	-	Familial adenomatous polyposis 1 (1)

Computational scores

Source: dbNSFP v4.9

Name	Calibrated prediction	Score	Prediction
BayesDel_noAF	Benign	-0.21
CADD	Benign	19
DANN	Benign	0.97
PhyloP100		3.3
PromoterAI		-0.39	Neutral

Splicing

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

Other links and lift over

dbSNP: rs922676017; hg19: chr5-112043266;