rs200951235
Variant summary
Our verdict is Benign. The variant received -10 ACMG points: 0P and 10B. BP4BP6BS1BS2
The NM_004329.3(BMPR1A):āc.499A>Gā(p.Met167Val) variant causes a missense change involving the alteration of a non-conserved nucleotide. The variant allele was found at a frequency of 0.000149 in 1,613,914 control chromosomes in the GnomAD database, with no homozygous occurrence. In-silico tool predicts a benign outcome for this variant. 17/22 in silico tools predict a benign outcome for this variant. Variant has been reported in ClinVar as Conflicting classifications of pathogenicity (no stars). Another variant affecting the same amino acid position, but resulting in a different missense (i.e. M167L) has been classified as Uncertain significance.
Frequency
Consequence
NM_004329.3 missense
Scores
Clinical Significance
Conservation
Publications
- generalized juvenile polyposis/juvenile polyposis coliInheritance: AD Classification: DEFINITIVE, STRONG, SUPPORTIVE Submitted by: Ambry Genetics, Orphanet, Genomics England PanelApp
- juvenile polyposis syndromeInheritance: AD Classification: DEFINITIVE, STRONG Submitted by: ClinGen, Labcorp Genetics (formerly Invitae), G2P
- polyposis syndrome, hereditary mixed, 2Inheritance: AD Classification: STRONG Submitted by: Genomics England PanelApp
- hereditary mixed polyposis syndromeInheritance: AD Classification: SUPPORTIVE Submitted by: Orphanet
- congenital heart defects, multiple typesInheritance: AD Classification: LIMITED Submitted by: Ambry Genetics
- pulmonary arterial hypertensionInheritance: Unknown Classification: NO_KNOWN Submitted by: ClinGen
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ACMG classification
Our verdict: Benign. The variant received -10 ACMG points.
Variant Effect in Transcripts
ACMG analysis was done for transcript: NM_004329.3. 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 |
|---|---|---|---|---|---|---|---|---|---|
| BMPR1A | NM_004329.3 | MANE Select | c.499A>G | p.Met167Val | missense | Exon 7 of 13 | NP_004320.2 | ||
| BMPR1A | NM_001406559.1 | c.499A>G | p.Met167Val | missense | Exon 7 of 14 | NP_001393488.1 | |||
| BMPR1A | NM_001406560.1 | c.499A>G | p.Met167Val | missense | Exon 7 of 14 | NP_001393489.1 |
Ensembl Transcripts
| Selected | Gene | Transcript | Tags | HGVSc | HGVSp | Effect | Exon Rank | Protein | UniProt |
|---|---|---|---|---|---|---|---|---|---|
| BMPR1A | ENST00000372037.8 | TSL:1 MANE Select | c.499A>G | p.Met167Val | missense | Exon 7 of 13 | ENSP00000361107.2 | ||
| BMPR1A | ENST00000480152.3 | TSL:3 | c.499A>G | p.Met167Val | missense | Exon 8 of 14 | ENSP00000483569.2 | ||
| BMPR1A | ENST00000713672.1 | c.499A>G | p.Met167Val | missense | Exon 6 of 12 | ENSP00000518974.1 |
Frequencies
GnomAD3 genomes AF: 0.0000657 AC: 10AN: 152220Hom.: 0 Cov.: 32 show subpopulations
GnomAD2 exomes AF: 0.0000597 AC: 15AN: 251294 AF XY: 0.0000663 show subpopulations
GnomAD4 exome AF: 0.000158 AC: 231AN: 1461694Hom.: 0 Cov.: 32 AF XY: 0.000154 AC XY: 112AN XY: 727162 show subpopulations
Age Distribution
GnomAD4 genome AF: 0.0000657 AC: 10AN: 152220Hom.: 0 Cov.: 32 AF XY: 0.0000538 AC XY: 4AN XY: 74370 show subpopulations
Age Distribution
ClinVar
Submissions by phenotype
Hereditary cancer-predisposing syndrome Uncertain:1Benign: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.
Juvenile polyposis syndrome Uncertain:2Benign:1
This variant is classified as a variant of uncertain significance as there is insufficient evidence to determine its impact on protein function and/or cancer risk.
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.
not specified Uncertain:1Benign:1
Variant summary: BMPR1A c.499A>G (p.Met167Val) results in a conservative amino acid change in the encoded protein sequence. Algorithms developed to predict the effect of missense changes on protein structure and function are either unavailable or do not agree on the potential impact of this missense change. The variant allele was found at a frequency of 6e-05 in 251294 control chromosomes. The observed variant frequency is approximately 30-fold of the estimated maximal expected allele frequency for a pathogenic variant in BMPR1A causing Juvenile Polyposis Syndrome phenotype (2e-06). c.499A>G has been observed in individuals affected with breast and/or ovarian cancer, colorectal cancer, or Lynch syndrome (e.g. Tung_2015, Maxwell_2016, Yurgelun_2017, Schubert_2019, Ferrer-Avargues_2021). One of the reports classified the variant as Likely Benign based on evidence of non-segregation with disease (breast and/or ovarian cancer) following familial studies (Maxwell_2016) and another reported the variant in an individual with Lynch syndrome who had a co-occurring pathogenic variant in MLH1 (Ferrer-Avargues_2021). These reports do not provide unequivocal conclusions about association of the variant with Juvenile Polyposis Syndrome. To our knowledge, no experimental evidence demonstrating an impact on protein function has been reported. The following publications have been ascertained in the context of this evaluation (PMID: 33630411, 27153395, 30426508, 31159747, 25186627, 25980754, 28135145). ClinVar contains an entry for this variant (Variation ID: 188242). Based on the evidence outlined above, the variant was classified as likely benign.
not provided Uncertain:1Benign:1
Observed in individuals with a personal or family history of colorectal, breast, or other cancers (PMID: 27153395, 25186627, 25980754, 28135145); In silico analysis indicates that this missense variant does not alter protein structure/function; This variant is associated with the following publications: (PMID: 28135145, 25980754, 25186627, 27153395, 31159747, 31668570, 28119430, 30426508)
Generalized juvenile polyposis/juvenile polyposis coli Uncertain:1
The BMPR1A c.499A>G (p.Met167Val) missense change has a maximum subpopulation frequency of 0.016% in gnomAD v2.1.1 (https://gnomad.broadinstitute.org/variant/10-88659852-A-G?dataset=gnomad_r2_1). Six of seven in silico tools predict a benign effect of this variant on protein function (BP4), but to our knowledge these predictions have not been confirmed by functional assays. This variant has been reported in at least one individual with colorectal cancer (PMID: 28135145) and in individuals with breast and/or ovarian cancer (PMID: 31159747). In summary, this variant meets criteria to be classified as of uncertain significance based on the ACMG/AMP criteria: BP4.
Computational scores
Source:
Splicing
Find out detailed SpliceAI scores and Pangolin per-transcript scores at