chr5-112838600-C-T
Variant summary
Our verdict is Benign. Variant got -15 ACMG points: 0P and 15B. BP4_ModerateBP6_Very_StrongBP7BS2
The NM_000038.6(APC):c.3006C>T(p.Ala1002Ala) variant causes a synonymous change involving the alteration of a non-conserved nucleotide. The variant allele was found at a frequency of 0.000274 in 1,613,912 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 (★★).
Frequency
Consequence
NM_000038.6 synonymous
Scores
Clinical Significance
Conservation
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ACMG classification
Verdict is Benign. Variant got -15 ACMG points.
Transcripts
RefSeq
Ensembl
Gene | Transcript | HGVSc | HGVSp | Effect | Exon rank | TSL | MANE | Protein | Appris | UniProt |
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APC | ENST00000257430.9 | c.3006C>T | p.Ala1002Ala | synonymous_variant | Exon 16 of 16 | 5 | NM_000038.6 | ENSP00000257430.4 | ||
ENSG00000258864 | ENST00000520401.1 | n.228+9628C>T | intron_variant | Intron 3 of 7 | 3 | ENSP00000454861.1 |
Frequencies
GnomAD3 genomes AF: 0.000204 AC: 31AN: 152072Hom.: 0 Cov.: 32
GnomAD3 exomes AF: 0.000183 AC: 46AN: 251254Hom.: 0 AF XY: 0.000177 AC XY: 24AN XY: 135788
GnomAD4 exome AF: 0.000282 AC: 412AN: 1461840Hom.: 1 Cov.: 33 AF XY: 0.000271 AC XY: 197AN XY: 727218
GnomAD4 genome AF: 0.000204 AC: 31AN: 152072Hom.: 0 Cov.: 32 AF XY: 0.000148 AC XY: 11AN XY: 74274
ClinVar
Submissions by phenotype
not provided Benign:4
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APC: BP4, BP7 -
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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. -
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Familial adenomatous polyposis 1 Benign:3
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This variant is considered benign. This variant is a silent/synonymous amino acid change and it is not expected to impact splicing. -
not specified Benign:2
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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. -
Carcinoma of colon Benign:1
The APC p.Ala1002= variant was not identified in the literature, but was identified in dbSNP (ID: rs72541810) as “Likely Benign”, ClinVar database (3 submissions: 1x Benign by GeneDx, 2x Likely Benign by Ambry Genetics & Invitae), COSMIC (Adenocarcinoma of the large intestine), LOVD Zhejiang Colon Cancer Database (LOVD) (unknown), Clinvitae database (as 2x Likely Benign and 1x Benign). This variant was also identified in the NHLBI GO Exome Sequencing Project in 3 of 8600 European American alleles (Freq: 0.00034) and the Exome Aggregation Consortium database (August 8th 2016) in 21 of 121266 chromosomes (freq. 0.000217) in the following populations: European (Non-Finnish) in 20 of 66618 chromosomes (freq. 0.0003), Latino in 1 of 11574 chromosomes (freq. 8.4 x 10 -5), but was not seen in African, East Asian, Finnish, other and South Asian populations. This variant was not identified in the InSiGHT Colon Cancer Gene Variant Database (LOVD), GeneInsight - COGR, UMD and the 1000 Genome Project database. In addition this variant was identified by our laboratory in a patient with MAP as co-occurring with pathogenic MUTYH homozygous variants (p.Tyr179Cys) increasing the likelihood that the p.Ala1002+ variant does not have clinical significance. The p.Ala1002= variant is not expected to have clinical significance because it does not result in a change of amino acid and is not located in a known consensus splice site. In addition, in silico or computational prediction software programs (SpliceSiteFinder, MaxEntScan, NNSPLICE, GeneSplicer, HumanSpliceFinder) do not predict a difference in splicing. In summary, based on the above information, the clinical significance of this variant cannot be determined with certainty at this time although we would lean towards a more benign role for this variant. This variant is classified as likely benign. -
APC-Associated Polyposis Disorders Benign:1
This variant was observed as part of a predisposition screen in an ostensibly healthy population. A literature search was performed for the gene, cDNA change, and amino acid change (where applicable). No publications were found based on this search. Allele frequency data from public databases allowed determination this variant is unlikely to cause disease. Therefore, this variant is classified as likely benign. -
Classic or attenuated familial adenomatous polyposis Benign:1
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Computational scores
Source:
Splicing
Find out detailed SpliceAI scores and Pangolin per-transcript scores at