Genetic Variant LDLR:n.-99A>G (chr19-11089450-A-G) – ACMG Classification: Uncertain_significance (0 pts)

Variant summary

Our verdict is Uncertain significance. The variant received 0 ACMG points: 2P and 2B. PM2BP4_Moderate

The ENST00000559340.2(LDLR):n.-99A>G 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. In-silico tool predicts a benign outcome for this variant. No clinical diagnostic laboratories have submitted clinical-significance assessments for this variant to ClinVar.

Frequency

Genomes: not found (cov: 32)

Exomes 𝑓: 0.0 ( 0 hom. )

Failed GnomAD Quality Control

Consequence

LDLR
ENST00000559340.2 non_coding_transcript_exon

Scores

Clinical Significance

Likely pathogenic criteria provided, single submitter P:1

Conservation

PhyloP100: 0.733

Publications

1 publications found

Variant links:

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]

LDLR links:

LDLR-AS1 (HGNC:54407): (LDLR antisense RNA 1) This gene represents a regulatory lncRNA that overlaps the 5' UTR and coding sequence of the LDLR (low density lipoprotein receptor) gene. This lncRNA overlaps LDLR in the antisense orientation, and has been shown to downregulate production of the low density lipoprotein receptor. [provided by RefSeq, Jul 2019]

LDLR-AS1 links:

ENSG00000307752 (HGNC:):

ENSG00000307752 links:

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ACMG classification

Classification was made for transcript

Our verdict: Uncertain_significance. The variant received 0 ACMG points.

PM2

Very rare variant in population databases, with high coverage;

BP4

Computational evidence support a benign effect (BayesDel_noAF=-0.46).

Transcripts

RefSeq

Gene	Transcript	HGVSc	HGVSp	Effect	Exon rank	MANE	Protein	UniProt
LDLR	NM_000527.5 link	c.-99A>G		upstream_gene_variant		ENST00000558518.6	NP_000518.1	P01130-1A0A024R7D5

Ensembl

Gene	Transcript	HGVSc	HGVSp	Effect	Exon rank	TSL	MANE	Protein	Appris	UniProt
LDLR	ENST00000558518.6 link	c.-99A>G		upstream_gene_variant		1	NM_000527.5	ENSP00000454071.1		P01130-1

Frequencies

GnomAD3 genomes

Cov.:

GnomAD4 exome

Data not reliable, filtered out with message: AC0

AF:

0.00

AC:

AN:

773240

Hom.:

Cov.:

AF XY:

0.00

AC XY:

AN XY:

402180

African (AFR)

AF:

0.00

AC:

AN:

20130

American (AMR)

AF:

0.00

AC:

AN:

35872

Ashkenazi Jewish (ASJ)

AF:

0.00

AC:

AN:

19562

East Asian (EAS)

AF:

0.00

AC:

AN:

35248

South Asian (SAS)

AF:

0.00

AC:

AN:

67142

European-Finnish (FIN)

AF:

0.00

AC:

AN:

43450

Middle Eastern (MID)

AF:

0.00

AC:

AN:

2748

European-Non Finnish (NFE)

AF:

0.00

AC:

AN:

512080

Other (OTH)

AF:

0.00

AC:

AN:

37008

GnomAD4 genome

Cov.:

Alfa

AF:

0.0000427

Hom.:

ClinVar

Significance: Likely pathogenic

Submissions summary: Pathogenic:1

Revision: criteria provided, single submitter

LINK: link

Submissions by phenotype

Hypercholesterolemia, familial, 1

Pathogenic:1

Dec 16, 2016

Centre de Génétique Moléculaire et Chromosomique, Unité de génétique de l'Obésité et des Dyslipidémies, APHP, GH Hôpitaux Universitaires Pitié-Salpêtrière / Charles-Foix

Significance:Likely pathogenic

Review Status:criteria provided, single submitter

Collection Method:clinical testing

subject mutated among 2600 FH index cases screened = 1 -

Computational scores

Source: dbNSFP v4.3

Name

Calibrated prediction

Score

Prediction

BayesDel_noAF

Benign

-0.46

CADD

Benign

9.0

(source)

DANN

Benign

0.69

PhyloP100

0.73

PromoterAI

-0.69

Under-expression

(source)

Splicing

Name

Calibrated prediction

Score

Prediction

SpliceAI score (max)

0.0

Details are displayed if max score is > 0.2

Find out detailed SpliceAI scores and Pangolin per-transcript scores at spliceailookup.broadinstitute.org

Publications

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Variant summary

Frequency

Consequence

Scores

Clinical Significance

Conservation

Publications

ACMG classification

Transcripts

RefSeq

Ensembl

Frequencies

ClinVar

Submissions by phenotype

Computational scores

Splicing

Publications

Other links and lift over