5-112837856-T-G
Variant summary
Our verdict is Benign. The variant received -17 ACMG points: 0P and 17B. BP4_StrongBP6_Very_StrongBP7BS1
The NM_000038.6(APC):c.2262T>G(p.Val754Val) variant causes a synonymous change involving the alteration of a non-conserved nucleotide. The variant allele was found at a frequency of 0.000182 in 1,614,044 control chromosomes in the GnomAD database, including 1 homozygotes. In-silico tool predicts a benign outcome for this variant. Variant has been reported in ClinVar as Likely benign (★★). Synonymous variant affecting the same amino acid position (i.e. V754V) has been classified as Likely benign.
Frequency
Consequence
NM_000038.6 synonymous
Scores
Clinical Significance
Conservation
Publications
- classic or attenuated familial adenomatous polyposisInheritance: AD Classification: DEFINITIVE Submitted by: ClinGen
- desmoid tumorInheritance: AD Classification: DEFINITIVE, STRONG Submitted by: G2P, Genomics England PanelApp
- familial adenomatous polyposis 1Inheritance: AD Classification: DEFINITIVE, STRONG, MODERATE Submitted by: Genomics England PanelApp, Labcorp Genetics (formerly Invitae), Ambry Genetics
- gastric adenocarcinoma and proximal polyposis of the stomachInheritance: AD Classification: DEFINITIVE, STRONG, SUPPORTIVE Submitted by: Ambry Genetics, Labcorp Genetics (formerly Invitae), ClinGen, Orphanet
- sarcomaInheritance: AD Classification: MODERATE Submitted by: Genomics England PanelApp
- APC-related attenuated familial adenomatous polyposisInheritance: AD Classification: SUPPORTIVE Submitted by: Orphanet
- Turcot syndrome with polyposisInheritance: AD Classification: SUPPORTIVE Submitted by: Orphanet
- Cenani-Lenz syndactyly syndromeInheritance: AR Classification: SUPPORTIVE Submitted by: Orphanet
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ACMG classification
Our verdict: Benign. The variant received -17 ACMG points.
Transcripts
RefSeq
| Gene | Transcript | HGVSc | HGVSp | Effect | Exon rank | MANE | Protein | UniProt |
|---|---|---|---|---|---|---|---|---|
| APC | NM_000038.6 | c.2262T>G | p.Val754Val | synonymous_variant | Exon 16 of 16 | ENST00000257430.9 | NP_000029.2 |
Ensembl
Frequencies
GnomAD3 genomes AF: 0.000920 AC: 140AN: 152156Hom.: 0 Cov.: 32 show subpopulations
GnomAD2 exomes AF: 0.000315 AC: 79AN: 250416 AF XY: 0.000266 show subpopulations
GnomAD4 exome AF: 0.000105 AC: 154AN: 1461770Hom.: 1 Cov.: 33 AF XY: 0.0000825 AC XY: 60AN XY: 727188 show subpopulations
Age Distribution
GnomAD4 genome AF: 0.000913 AC: 139AN: 152274Hom.: 0 Cov.: 32 AF XY: 0.000940 AC XY: 70AN XY: 74472 show subpopulations
Age Distribution
ClinVar
Submissions by phenotype
not specified Benign:5
Variant summary: The APC c.2262T>G (p.Val754Val) variant involves the alteration of a non-conserved nucleotide causing a synonymous change and 4/5 splice prediction tools predict no significant impact on normal splicing. ESE finder predicts that this variant may create ESE binding sites at the locus. However, these predictions have yet to be confirmed by functional studies. This variant was found in 102/276142 control chromosomes (gnomAD), predominantly observed in the African subpopulation at a frequency of 0.003833 (92/24002). This frequency is about 54 times the estimated maximal expected allele frequency of a pathogenic APC variant (0.0000714), strongly suggesting this is likely a benign polymorphism found primarily in the populations of African origin. In addition, multiple clinical diagnostic laboratories/reputable databases classified this variant as likely benign or benign. The variant of interest has not, to our knowledge, been reported in affected individuals via publications. Taken together, this variant is classified as benign.
This variant is considered likely benign or benign based on one or more of the following criteria: it is a conservative change, it occurs at a poorly conserved position in the protein, it is predicted to be benign by multiple in silico algorithms, and/or has population frequency not consistent with disease.
Familial adenomatous polyposis 1 Benign:4
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.
This variant is considered benign. This variant is a silent/synonymous amino acid change and it is not expected to impact splicing.
Hereditary cancer-predisposing syndrome Benign:4
This alteration is classified as likely benign based on a combination of the following: seen in unaffected individuals, population frequency, intact protein function, lack of segregation with disease, co-occurrence, RNA analysis, in silico models, amino acid conservation, lack of disease association in case-control studies, and/or the mechanism of disease or impacted region is inconsistent with a known cause of pathogenicity.
The synonymous variant NM_000038.6(APC):c.2262T>G (p.Val754=) has been reported to ClinVar as Benign/Likely benign with a status of (2 stars) criteria provided, multiple submitters, no conflicts (Variation ID 135687 as of 2025-04-03). The p.Val754= variant is observed in 10/5,008 (0.1997%) alleles from individuals of 1kG All background in 1kG, which is greater than expected for the disorder. The nucleotide c.2262 in APC is not conserved according to a GERP++ and PhyloP analysis of 100 vertebrates. For these reasons, this variant has been classified as Benign.
not provided Benign:2
APC: BP4, BP7
Desmoid disease, hereditary Benign:1
Classic or attenuated familial adenomatous polyposis Benign:1
Computational scores
Source:
Splicing
Find out detailed SpliceAI scores and Pangolin per-transcript scores at