5-112707526-AT-TAGCAAGGG

Variant names:

• chr5-112707526-AT-TAGCAAGGG
• rs1580995904
• NM_001407446.1:c.-192_-191delATinsTAGCAAGGG

Variant summary

Our verdict is Pathogenic. The variant received 14 ACMG points: 14P and 0B. PS3 PM2 PP5_Very_Strong

The NM_001407446.1(APC):​c.-192_-191delATinsTAGCAAGGG variant causes a 5 prime UTR change involving the alteration of a non-conserved nucleotide. The variant was absent in control chromosomes in GnomAD project. Variant has been reported in ClinVar as Likely pathogenic (★★). ClinVar reports functional evidence for this variant: "SCV000948558: Other variants that disrupt the DNA sequence in this region of the APC promoter have been observed in affected individuals (PMID:20685668, 21813476, 27087319, 27343414, Invitae), suggesting that integrity of this region is clinically significant." and additional evidence is available in ClinVar. The gene APC is included in the ClinGen Criteria Specification Registry.

• Frequency: Genomes: not found (cov: 33)
• Consequence: APC NM_001407446.1 5_prime_UTR
• Clinical Significance: Likely pathogenic criteria provided, multiple submitters, no conflicts P:2
• Conservation: PhyloP100: 3.40
• 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: Orphanet, Ambry Genetics, ClinGen, Labcorp Genetics (formerly Invitae)
• 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

Specifications for APC are available in the ClinGen Criteria Specification Registry and recommended for reference when assigning criteria.

Our verdict: Pathogenic. The variant received 14 ACMG points.

• PS3: PS3 evidence extracted from ClinVar submissions: SCV000948558: Other variants that disrupt the DNA sequence in this region of the APC promoter have been observed in affected individuals (PMID: 20685668, 21813476, 27087319, 27343414, Invitae), suggesting that integrity of this region is clinically significant.; SCV002721424: This region has been identified as a highly conserved transcription factor binding site for the APC 1B promoter region and point mutations have been shown to disrupt transcriptional activity (Li J et al. Am. J. Hum. Genet. 2016 May;98:830-42).
• PM2: Very rare variant in population databases, with high coverage
• PP5: Variant 5-112707526-AT-TAGCAAGGG is Pathogenic according to our data. Variant chr5-112707526-AT-TAGCAAGGG is described in ClinVar as Likely_pathogenic. ClinVar VariationId is 652807.Status of the report is criteria_provided_multiple_submitters_no_conflicts, 2 stars.

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

Sel.	Gene	Transcript	Tags	HGVSc	HGVSp	Effect	Exon Rank	Protein	UniProt
	APC	NM_001407446.1		c.-192_-191delATinsTAGCAAGGG		5_prime_UTR	Exon 1 of 16	NP_001394375.1
	APC	NM_001407447.1		c.-375_-374delATinsTAGCAAGGG		5_prime_UTR	Exon 1 of 17	NP_001394376.1	R4GMU6
	APC	NM_001407448.1		c.-142_-141delATinsTAGCAAGGG		5_prime_UTR	Exon 1 of 17	NP_001394377.1	R4GMU6

Ensembl Transcripts

Sel.	Gene	Transcript	Tags	HGVSc	HGVSp	Effect	Exon Rank	Protein	UniProt
	APC	ENST00000951167.1		c.-142_-141delATinsTAGCAAGGG		5_prime_UTR	Exon 1 of 17	ENSP00000621226.1
	APC	ENST00000509732.6	TSL:4	c.-142_-141delATinsTAGCAAGGG		5_prime_UTR	Exon 1 of 16	ENSP00000426541.2	P25054-1
	APC	ENST00000507379.6	TSL:2	c.-192_-191delATinsTAGCAAGGG		5_prime_UTR	Exon 1 of 14	ENSP00000423224.2	P25054-3

Frequencies

GnomAD3 genomes Cov.: 33

We have no GnomAD4 exomes data on this position. Probably position not covered by the project.

GnomAD4 genome Cov.: 33

ClinVar

ClinVar submissions

Significance: Likely pathogenic

Revision: criteria provided, multiple submitters, no conflicts

Pathogenic	VUS	Benign	Condition
1	-	-	Familial adenomatous polyposis 1 (1)
1	-	-	Hereditary cancer-predisposing syndrome (1)

Computational scores

Source: dbNSFP v4.9

Name	Calibrated prediction	Score	Prediction
PhyloP100		3.4

Splicing

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

Other links and lift over

dbSNP: rs1580995904; hg19: chr5-112043223;