5-112839226-T-G
Variant summary
Our verdict is Benign. The variant received -16 ACMG points: 0P and 16B. BP4_StrongBP6_Very_StrongBS1
The NM_000038.6(APC):c.3632T>G(p.Met1211Arg) variant causes a missense change. The variant allele was found at a frequency of 0.000129 in 1,614,176 control chromosomes in the GnomAD database, with no homozygous occurrence. In-silico tool predicts a benign outcome for this variant. 16/22 in silico tools predict a benign outcome for this variant. Variant has been reported in ClinVar as Likely benign (★★). Another variant affecting the same amino acid position, but resulting in a different missense (i.e. M1211T) has been classified as Uncertain significance.
Frequency
Consequence
NM_000038.6 missense
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 -16 ACMG points.
Variant Effect in Transcripts
ACMG analysis was done for transcript: NM_000038.6. 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_000038.6 | MANE Select | c.3632T>G | p.Met1211Arg | missense | Exon 16 of 16 | NP_000029.2 | ||
| APC | NM_001407446.1 | c.3716T>G | p.Met1239Arg | missense | Exon 16 of 16 | NP_001394375.1 | |||
| APC | NM_001354896.2 | c.3686T>G | p.Met1229Arg | missense | Exon 17 of 17 | NP_001341825.1 |
Ensembl Transcripts
| Selected | Gene | Transcript | Tags | HGVSc | HGVSp | Effect | Exon Rank | Protein | UniProt |
|---|---|---|---|---|---|---|---|---|---|
| APC | ENST00000257430.9 | TSL:5 MANE Select | c.3632T>G | p.Met1211Arg | missense | Exon 16 of 16 | ENSP00000257430.4 | ||
| APC | ENST00000508376.6 | TSL:1 | c.3632T>G | p.Met1211Arg | missense | Exon 17 of 17 | ENSP00000427089.2 | ||
| APC | ENST00000502371.3 | TSL:1 | n.*1830T>G | non_coding_transcript_exon | Exon 12 of 12 | ENSP00000484935.2 |
Frequencies
GnomAD3 genomes AF: 0.0000657 AC: 10AN: 152188Hom.: 0 Cov.: 32 show subpopulations
GnomAD2 exomes AF: 0.000275 AC: 69AN: 250614 AF XY: 0.000384 show subpopulations
GnomAD4 exome AF: 0.000135 AC: 198AN: 1461870Hom.: 0 Cov.: 33 AF XY: 0.000208 AC XY: 151AN XY: 727232 show subpopulations
Age Distribution
GnomAD4 genome AF: 0.0000657 AC: 10AN: 152306Hom.: 0 Cov.: 32 AF XY: 0.000107 AC XY: 8AN XY: 74470 show subpopulations
Age Distribution
ClinVar
Submissions by phenotype
Familial adenomatous polyposis 1 Uncertain:2Benign:2
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 likely benign. This variant has been observed at a population frequency that is significantly greater than expected given the associated disease prevalence and penetrance.
The APC p.Met1211Arg variant was not identified in the literature nor was it identified in dbSNP, NHLBI Exome Sequencing Project (Exome Variant Server), HGMD, COSMIC, MutDB, “InSiGHT Colon Cancer Database”, “Zhejiang Colon Cancer Database”, and UMD. The variant was submitted to the Clinvar database 1X by multiple submitters (INVITAE as uncertain significance, and ITMI, classification not provided). The p.Met1211 residue is not conserved in mammals and lower organisms, increasing the likelihood that this variant does not have clinical significance. Computational analyses (PolyPhen-2, SIFT, AlignGVGD, BLOSUM, MutationTaster) provide inconsistent predictions regarding the impact to the protein and this information is not very predictive of pathogenicity. In summary, based on the above information, the clinical significance of this variant cannot be determined with certainty at this time. This variant is classified as a variant of unknown significance.
Hereditary cancer-predisposing syndrome Benign:3
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.
not specified Benign:2Other:1
Variant summary: The variant, APC c.3632T>G (p.Met1211Arg) results in a non-conservative amino acid change in the encoded protein sequence. Four of five in-silico tools predict a benign effect of the variant on protein function. The variant allele was found at a frequency of 0.00025 in 276326 control chromosomes, predominantly at a frequency of 0.0022 within the South Asian subpopulation in the gnomAD database. The observed variant frequency within South Asian control individuals in the gnomAD database is approximately 30.8 fold of the estimated maximal expected allele frequency for a pathogenic variant in APC causing Familial Adenomatous Polyposis phenotype (7.1e-05), strongly suggesting that the variant is a benign polymorphism found primarily in populations of South Asian origin. The variant, c.3632T>G has been reported in the literature in individuals affected with breast and colorectal cancer (Chakrabarty_2017, Tung_2015, Chakrabarty _2017). This report does not provide unequivocal conclusions about association of the variant with Familial Adenomatous Polyposis. To our knowledge, no experimental evidence demonstrating an impact on protein function has been reported. Five clinical diagnostic laboratories have submitted clinical-significance assessments for this variant to ClinVar after 2014 without evidence for independent evaluation. Multiple laboratories reported the variant with conflicting assessments (likely benign (2X) and uncertain significance (3X)). Based on the evidence outlined above, the variant was classified as likely benign.
Classic or attenuated familial adenomatous polyposis Benign:1
not provided Benign:1
This variant is associated with the following publications: (PMID: 30093976, 29641532, 25186627, 24728327)
APC-related disorder Benign:1
This variant is classified as likely benign based on ACMG/AMP sequence variant interpretation guidelines (Richards et al. 2015 PMID: 25741868, with internal and published modifications).
Computational scores
Source:
Splicing
Find out detailed SpliceAI scores and Pangolin per-transcript scores at