rs387906307
Positions:
Variant summary
Our verdict is Uncertain significance. Variant got 3 ACMG points: 3P and 0B. PM2PP5
The NR_163945.1(LDLR-AS1):n.249del variant causes a non coding transcript exon change involving the alteration of a non-conserved nucleotide. The variant was absent in control chromosomes in GnomAD project. Variant has been reported in ClinVar as Conflicting classifications of pathogenicity (no stars).
Frequency
Genomes: not found (cov: 32)
Consequence
LDLR-AS1
NR_163945.1 non_coding_transcript_exon
NR_163945.1 non_coding_transcript_exon
Scores
Not classified
Clinical Significance
Conservation
PhyloP100: 0.859
Genes affected
LDLR (HGNC:6547): (low density lipoprotein receptor) The low density lipoprotein receptor (LDLR) gene family consists of cell surface proteins involved in receptor-mediated endocytosis of specific ligands. The encoded protein is normally bound at the cell membrane, where it binds low density lipoprotein/cholesterol and is taken into the cell. Lysosomes release the cholesterol, which is made available for repression of microsomal enzyme 3-hydroxy-3-methylglutaryl coenzyme A (HMG CoA) reductase, the rate-limiting step in cholesterol synthesis. At the same time, a reciprocal stimulation of cholesterol ester synthesis takes place. Mutations in this gene cause the autosomal dominant disorder, familial hypercholesterolemia. Alternate splicing results in multiple transcript variants.[provided by RefSeq, May 2022]
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ACMG classification
Classification made for transcript
Verdict is Uncertain_significance. Variant got 3 ACMG points.
PM2
?
Very rare variant in population databases, with high coverage;
PP5
?
Variant 19-11089410-CT-C is Pathogenic according to our data. Variant chr19-11089410-CT-C is described in ClinVar as [Conflicting_classifications_of_pathogenicity]. Clinvar id is 3745.We mark this variant Likely_pathogenic, oryginal submissions are: {Likely_pathogenic=3, Uncertain_significance=1}. Variant chr19-11089410-CT-C is described in Lovd as [Pathogenic]. Variant chr19-11089410-CT-C is described in Lovd as [Likely_pathogenic].
Transcripts
RefSeq
Gene | Transcript | HGVSc | HGVSp | Effect | #exon/exons | MANE | UniProt |
---|---|---|---|---|---|---|---|
LDLR-AS1 | NR_163945.1 | n.249del | non_coding_transcript_exon_variant | 1/1 |
Ensembl
Gene | Transcript | HGVSc | HGVSp | Effect | #exon/exons | TSL | MANE | Appris | UniProt |
---|---|---|---|---|---|---|---|---|---|
LDLR | ENST00000559340.2 | upstream_gene_variant | 5 |
Frequencies
GnomAD3 genomes ? Cov.: 32
GnomAD3 genomes
?
Cov.:
32
GnomAD4 exome Cov.: 7
GnomAD4 exome
Cov.:
7
GnomAD4 genome ? Cov.: 32
GnomAD4 genome
?
Cov.:
32
ClinVar
Significance: Conflicting classifications of pathogenicity
Submissions summary: Pathogenic:4Uncertain:1
Revision: criteria provided, conflicting classifications
LINK: link
Submissions by phenotype
Hypercholesterolemia, familial, 1 Pathogenic:4
Likely pathogenic, criteria provided, single submitter | curation;literature only | Cardiovascular Research Group, Instituto Nacional de Saude Doutor Ricardo Jorge | Mar 01, 2016 | - - |
Likely pathogenic, criteria provided, single submitter | clinical testing | All of Us Research Program, National Institutes of Health | Dec 18, 2023 | This variant deletes one nucleotide at the -138 position in the conserved SP1 binding site in the promoter region of the LDLR gene. This variant is also known as c.-45del and FH-Pyrgos in the literature. Functional studies using lymphocytes derived from a heterozygous individual have shown that this variant resulted in reduced LDLR activity and absent mRNA transcription (PMID: 14616764). An in-vitro functional study using transfected mammalian cells has shown that this variant causes a significant reduction in promoter activity (PMID: 14616764, 17625505). This variant has been reported in at least two unrelated individuals affected with familial hypercholesterolemia (PMID: 14616764, 35631530). It has been shown that this variant segregates with disease in three affected individuals in one family (PMID: 14616764). This variant has not been identified in the general population by the Genome Aggregation Database (gnomAD). Based on the available evidence, this variant is classified as Likely Pathogenic. - |
Likely pathogenic, criteria provided, single submitter | literature only | LDLR-LOVD, British Heart Foundation | Mar 25, 2016 | - - |
Pathogenic, no assertion criteria provided | literature only | OMIM | Nov 01, 2003 | - - |
Familial hypercholesterolemia Uncertain:1
Uncertain significance, criteria provided, single submitter | clinical testing | Invitae | Feb 22, 2023 | This variant occurs in a non-coding region of the LDLR gene. It does not change the encoded amino acid sequence of the LDLR protein. This variant is not present in population databases (gnomAD no frequency). This variant has been observed in individual(s) with familial hypercholesterolemia (PMID: 14616764). It has also been observed to segregate with disease in related individuals. This variant is also known as c.-45del. ClinVar contains an entry for this variant (Variation ID: 3745). Studies have shown that this variant alters LDLR gene expression (PMID: 14616764, 17625505). In summary, the available evidence is currently insufficient to determine the role of this variant in disease. Therefore, it has been classified as a Variant of Uncertain Significance. - |
Computational scores
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Calibrated prediction
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Prediction
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