rs143335467
Variant summary
Our verdict is Benign. The variant received -8 ACMG points: 0P and 8B. BA1
This summary comes from the ClinGen Evidence Repository: The filtering allele frequency of the c.1068A>G (p.Gln356=) variant in the BRAF gene is 0.115% (27/16512) of South Asian chromosomes by the Exome Aggregation Consortium, which is a high enough frequency to be classified as benign based on thresholds defined by the ClinGen RASopathy Expert Panel (BA1; PMID:29493581) LINK:https://erepo.genome.network/evrepo/ui/classification/CA135028/MONDO:0021060/004
Frequency
Consequence
NM_001374258.1 synonymous
Scores
Clinical Significance
Conservation
Publications
- cardiofaciocutaneous syndromeInheritance: AD Classification: DEFINITIVE, SUPPORTIVE Submitted by: ClinGen, Orphanet
- cardiofaciocutaneous syndrome 1Inheritance: AD Classification: DEFINITIVE, STRONG Submitted by: Labcorp Genetics (formerly Invitae), PanelApp Australia, Ambry Genetics, G2P, Genomics England PanelApp
- LEOPARD syndrome 3Inheritance: AD Classification: DEFINITIVE, STRONG, LIMITED Submitted by: G2P, Labcorp Genetics (formerly Invitae), Ambry Genetics, Genomics England PanelApp
- Noonan syndrome 7Inheritance: AD Classification: DEFINITIVE, STRONG, MODERATE Submitted by: Labcorp Genetics (formerly Invitae), PanelApp Australia, G2P, Ambry Genetics, Genomics England PanelApp
- Noonan syndromeInheritance: AD Classification: MODERATE Submitted by: ClinGen
- Noonan syndrome with multiple lentiginesInheritance: AD Classification: SUPPORTIVE, LIMITED Submitted by: ClinGen, Orphanet
- anaplastic astrocytomaInheritance: AD Classification: LIMITED Submitted by: Ambry Genetics
- Costello syndromeInheritance: AD Classification: NO_KNOWN Submitted by: ClinGen
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ACMG classification
Our verdict: Benign. The variant received -8 ACMG points.
Transcripts
RefSeq
Ensembl
| Gene | Transcript | HGVSc | HGVSp | Effect | Exon rank | TSL | MANE | Protein | Appris | UniProt |
|---|---|---|---|---|---|---|---|---|---|---|
| BRAF | ENST00000644969.2 | c.1068A>G | p.Gln356Gln | synonymous_variant | Exon 8 of 20 | NM_001374258.1 | ENSP00000496776.1 | |||
| BRAF | ENST00000646891.2 | c.1068A>G | p.Gln356Gln | synonymous_variant | Exon 8 of 18 | NM_004333.6 | ENSP00000493543.1 |
Frequencies
GnomAD3 genomes AF: 0.000112 AC: 17AN: 152132Hom.: 0 Cov.: 32 show subpopulations
GnomAD2 exomes AF: 0.000282 AC: 71AN: 251462 AF XY: 0.000353 show subpopulations
GnomAD4 exome AF: 0.000142 AC: 207AN: 1461860Hom.: 2 Cov.: 31 AF XY: 0.000179 AC XY: 130AN XY: 727228 show subpopulations
Age Distribution
GnomAD4 genome AF: 0.000118 AC: 18AN: 152250Hom.: 0 Cov.: 32 AF XY: 0.000175 AC XY: 13AN XY: 74444 show subpopulations
Age Distribution
ClinVar
Submissions by phenotype
not specified Benign:2
Variant summary: BRAF c.1068A>G alters a non-conserved nucleotide resulting in a synonymous change. 4/5 computational tools predict no significant impact on normal splicing. However, these predictions have yet to be confirmed by functional studies. The variant allele was found at a frequency of 0.00026 in 277200 control chromosomes in the gnomAD database, including 1 homozygotes. The observed variant frequency is approximately 105.34 fold of the estimated maximal expected allele frequency for a pathogenic variant in BRAF causing Noonan Syndrome and Related Conditions phenotype (2.5e-06), strongly suggesting that the variant is benign. To our knowledge, no occurrence of c.1068A>G in individuals affected with Noonan Syndrome and Related Conditions and no experimental evidence demonstrating its impact on protein function have been reported. Two clinical diagnostic laboratories have submitted clinical-significance assessments for this variant to ClinVar after 2014 without evidence for independent evaluation and classified the variant as benign/likely benign. Based on the evidence outlined above, the variant was classified as benign. -
Gln356Gln in exon 8 of BRAF: This variant is not expected to have clinical signi ficance because it does not alter an amino acid residue, is not located near a s plice junction, and has been identified in <1% of chromosomes from a broad but c linically and racially unspecified population (dbSNP rs143335467). -
not provided Benign:2
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BRAF: BP4, BP7 -
RASopathy Benign:2
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The filtering allele frequency of the c.1068A>G (p.Gln356=) variant in the BRAF gene is 0.115% (27/16512) of South Asian chromosomes by the Exome Aggregation Consortium, which is a high enough frequency to be classified as benign based on thresholds defined by the ClinGen RASopathy Expert Panel (BA1; PMID:29493581) -
LEOPARD syndrome 3 Benign:1
This variant was observed in the ICSL laboratory as part of a predisposition screen in an ostensibly healthy population. It had not been previously curated by ICSL or reported in the Human Gene Mutation Database (HGMD: prior to June 1st, 2018), and was therefore a candidate for classification through an automated scoring system. Utilizing variant allele frequency, disease prevalence and penetrance estimates, and inheritance mode, an automated score was calculated to assess if this variant is too frequent to cause the disease. Based on the score and internal cut-off values, a variant classified as benign is not then subjected to further curation. The score for this variant resulted in a classification of benign for this disease. -
Cardiovascular phenotype Benign:1
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. -
Noonan syndrome and Noonan-related syndrome Benign:1
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Computational scores
Source:
Splicing
Find out detailed SpliceAI scores and Pangolin per-transcript scores at