10-86921701-A-G
Variant summary
Our verdict is Benign. Variant got -20 ACMG points: 0P and 20B. BP4_StrongBP6_Very_StrongBA1
The NM_004329.3(BMPR1A):c.1342+6A>G variant causes a splice region, intron change involving the alteration of a non-conserved nucleotide. The variant allele was found at a frequency of 0.00423 in 1,614,160 control chromosomes in the GnomAD database, including 252 homozygotes. In-silico tool predicts a benign outcome for this variant. 3/3 splice prediction tools predict no significant impact on normal splicing. Variant has been reported in ClinVar as Benign (★★).
Frequency
Consequence
NM_004329.3 splice_region, intron
Scores
Clinical Significance
Conservation
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ACMG classification
Verdict is Benign. Variant got -20 ACMG points.
Transcripts
RefSeq
Ensembl
Frequencies
GnomAD3 genomes AF: 0.0222 AC: 3375AN: 152192Hom.: 131 Cov.: 32
GnomAD3 exomes AF: 0.00586 AC: 1474AN: 251490Hom.: 51 AF XY: 0.00442 AC XY: 601AN XY: 135920
GnomAD4 exome AF: 0.00236 AC: 3447AN: 1461850Hom.: 121 Cov.: 31 AF XY: 0.00205 AC XY: 1489AN XY: 727224
GnomAD4 genome AF: 0.0222 AC: 3382AN: 152310Hom.: 131 Cov.: 32 AF XY: 0.0211 AC XY: 1572AN XY: 74476
ClinVar
Submissions by phenotype
not specified Benign:7
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Juvenile polyposis syndrome Benign:3
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This variant is considered benign. This variant is intronic and is not expected to impact mRNA splicing. This variant has been observed at a population frequency that is significantly greater than expected given the associated disease prevalence and penetrance. -
not provided Benign:2
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Hereditary cancer-predisposing syndrome Benign:2
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The splice region variant NM_004329.3(BMPR1A):c.1342+6A>G has been reported to ClinVar as Benign with a status of (2 stars) criteria provided, multiple submitters, no conflicts (Variation ID 301352 as of 2025-01-02).The c.1342+6A>G variant is observed in 130/5,008 (2.5958%) alleles from individuals of 1kG All background in 1kG, indicating it is a common benign variant. The c.1342+6A>G variant is not predicted to disrupt the existing donor splice site 4bp upstream by any splice site algorithm. The c.1342+6A>G variant results in a substitution of a base that is not predicted conserved by GERP++ and PhyloP. For these reasons, this variant has been classified as Benign. -
Polyposis syndrome, hereditary mixed, 2 Benign:1
The BMPR1A c.1342+6A>G was identified in dbSNP (ID: rs55763614) as “With Likely benign allele”, and ClinVar (classified as benign by Invitae, Quest Diagnostics Nichols Institute San Juan Capistrano, Color, Prevention Genetics and Mayo Clinic Genetic Testing Laboratories; and likely benign by Illumina). The variant was identified in control databases in 2067 (75 homozygous) of 277240 chromosomes at a frequency of 0.007 (Genome Aggregation Database Feb 27, 2017), observed in the following populations: African in 1906 (75 homozygous) of 24032 chromosomes (freq: 0.08), Other in 18 of 6466 chromosomes (freq: 0.003), Latino in 118 of 34418 chromosomes (freq: 0.003), European Non-Finnish in 22 of 126728 chromosomes (freq: 0.0002), and South Asian in 3 of 30780 chromosomes (freq: 0.0001), while not observed in the Ashkenazi Jewish, East Asian, and European Finnish populations. The c.1342+6A>G variant is located in the 5' splice region but does not affect the invariant +1 and +2 positions. However, positions +3 to +6 are part of the splicing consensus sequence and variants involving these positions sometimes affect splicing. In silico or computational prediction software programs (SpliceSiteFinder, MaxEntScan, NNSPLICE, GeneSplicer) do not predict a difference in splicing. In summary, based on the above information this variant meets our laboratory's criteria to be classified as benign. -
Generalized juvenile polyposis/juvenile polyposis coli 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. -
Computational scores
Source:
Splicing
Find out detailed SpliceAI scores and Pangolin per-transcript scores at