15-90749499-A-C
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Variant summary
Our verdict is Likely benign. Variant got -5 ACMG points: 2P and 7B. PM2BP4_StrongBP6_ModerateBP7
The NM_000057.4(BLM):āc.231A>Cā(p.Leu77Leu) variant causes a synonymous change involving the alteration of a non-conserved nucleotide. The variant allele was found at a frequency of 0.00000137 in 1,461,826 control chromosomes in the GnomAD database, with no homozygous occurrence. In-silico tool predicts a benign outcome for this variant. Variant has been reported in ClinVar as Likely benign (ā ).
Frequency
Genomes: not found (cov: 32)
Exomes š: 0.0000014 ( 0 hom. )
Consequence
BLM
NM_000057.4 synonymous
NM_000057.4 synonymous
Scores
2
Clinical Significance
Conservation
PhyloP100: -2.62
Genes affected
BLM (HGNC:1058): (BLM RecQ like helicase) The Bloom syndrome is an autosomal recessive disorder characterized by growth deficiency, microcephaly and immunodeficiency among others. It is caused by homozygous or compound heterozygous mutation in the gene encoding DNA helicase RecQ protein on chromosome 15q26. This Bloom-associated helicase unwinds a variety of DNA substrates including Holliday junction, and is involved in several pathways contributing to the maintenance of genome stability. Identification of pathogenic Bloom variants is required for heterozygote testing in at-risk families. [provided by RefSeq, May 2020]
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ACMG classification
Classification made for transcript
Verdict is Likely_benign. Variant got -5 ACMG points.
PM2
Very rare variant in population databases, with high coverage;
BP4
Computational evidence support a benign effect (BayesDel_noAF=-0.89).
BP6
Variant 15-90749499-A-C is Benign according to our data. Variant chr15-90749499-A-C is described in ClinVar as [Likely_benign]. Clinvar id is 2038676.Status of the report is criteria_provided_single_submitter, 1 stars.
BP7
Synonymous conserved (PhyloP=-2.62 with no splicing effect.
Transcripts
RefSeq
Gene | Transcript | HGVSc | HGVSp | Effect | #exon/exons | MANE | Protein | UniProt |
---|---|---|---|---|---|---|---|---|
BLM | NM_000057.4 | c.231A>C | p.Leu77Leu | synonymous_variant | 3/22 | ENST00000355112.8 | NP_000048.1 |
Ensembl
Gene | Transcript | HGVSc | HGVSp | Effect | #exon/exons | TSL | MANE | Protein | Appris | UniProt |
---|---|---|---|---|---|---|---|---|---|---|
BLM | ENST00000355112.8 | c.231A>C | p.Leu77Leu | synonymous_variant | 3/22 | 1 | NM_000057.4 | ENSP00000347232.3 |
Frequencies
GnomAD3 genomes Cov.: 32
GnomAD3 genomes
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GnomAD3 exomes AF: 0.00000398 AC: 1AN: 251324Hom.: 0 AF XY: 0.00000736 AC XY: 1AN XY: 135880
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GnomAD4 exome AF: 0.00000137 AC: 2AN: 1461826Hom.: 0 Cov.: 31 AF XY: 0.00000138 AC XY: 1AN XY: 727212
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GnomAD4 genome Cov.: 32
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ClinVar
Significance: Likely benign
Submissions summary: Benign:1
Revision: criteria provided, single submitter
LINK: link
Submissions by phenotype
Bloom syndrome Benign:1
Likely benign, criteria provided, single submitter | clinical testing | Labcorp Genetics (formerly Invitae), Labcorp | Dec 09, 2021 | - - |
Computational scores
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BayesDel_noAF
Benign
CADD
Benign
DANN
Benign
Splicing
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SpliceAI score (max)
Details are displayed if max score is > 0.2
Find out detailed SpliceAI scores and Pangolin per-transcript scores at