rs879254359

Variant names:

• chr19-11089324-T-TA
• rs879254359
• NR_163945.1:n.335dupT

Variant summary

Our verdict is Uncertain significance. The variant received 2 ACMG points: 2P and 0B. PM2

The NR_163945.1(LDLR-AS1):​n.335dupT variant causes a non coding transcript exon change. The variant allele was found at a frequency of 0.00000285 in 350,664 control chromosomes in the GnomAD database, with no homozygous occurrence. Variant has been reported in ClinVar as Uncertain significance (★).

• Frequency:
  • Genomes: not found (cov: 32)
  • Exomes 𝑓: 0.0000029 (0 hom.)
• Consequence: LDLR-AS1 NR_163945.1 non_coding_transcript_exon
• Clinical Significance: Uncertain significance criteria provided, single submitter U:1
• Conservation: PhyloP100: 4.17
• Publications: 0 publications found

Genes affected

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 (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 Gene-Disease associations (from GenCC):

• hypercholesterolemia, familial, 1

  Inheritance: AD, SD Classification: DEFINITIVE, STRONG Submitted by: Labcorp Genetics (formerly Invitae), Laboratory for Molecular Medicine, ClinGen, Genomics England PanelApp
• homozygous familial hypercholesterolemia

  Inheritance: AR Classification: SUPPORTIVE Submitted by: Orphanet

ENSG00000307752 (HGNC:):

ACMG classification

Our verdict: Uncertain_significance. The variant received 2 ACMG points.

• PM2: Very rare variant in population databases, with high coverage

Variant Effect in Transcripts

ACMG analysis was done for transcript: NR_163945.1. You can select a different transcript below to see updated ACMG assignments.

RefSeq Transcripts

Sel.	Gene	Transcript	Tags	HGVSc	HGVSp	Effect	Exon Rank	Protein	UniProt
	LDLR-AS1	NR_163945.1		n.335dupT		non_coding_transcript_exon	Exon 1 of 1
	LDLR	NM_000527.5	MANE Select	c.-225_-224insA		upstream_gene	N/A	NP_000518.1	P01130-1
	LDLR	NM_001195798.2		c.-225_-224insA		upstream_gene	N/A	NP_001182727.1	P01130-5

Ensembl Transcripts

Sel.	Gene	Transcript	Tags	HGVSc	HGVSp	Effect	Exon Rank	Protein	UniProt
	LDLR	ENST00000558518.6	TSL:1 MANE Select	c.-225_-224insA		upstream_gene	N/A	ENSP00000454071.1	P01130-1
	LDLR	ENST00000558013.5	TSL:1	c.-225_-224insA		upstream_gene	N/A	ENSP00000453346.1	P01130-5
	LDLR	ENST00000557933.5	TSL:5	c.-225_-224insA		upstream_gene	N/A	ENSP00000453557.1	H0YMD1

Frequencies

GnomAD3 genomes Cov.: 32

GnomAD4 exome AF: 0.00000285 AC: 1 AN: 350664 Hom.: 0 Cov.: 2 AF XY: 0.00 AC XY: 0 AN XY: 183174

African (AFR) AF: 0.00 AC: 0 AN: 9508

American (AMR) AF: 0.00 AC: 0 AN: 12018

Ashkenazi Jewish (ASJ) AF: 0.00 AC: 0 AN: 11402

East Asian (EAS) AF: 0.00 AC: 0 AN: 25514

South Asian (SAS) AF: 0.00 AC: 0 AN: 27790

European-Finnish (FIN) AF: 0.00 AC: 0 AN: 26644

Middle Eastern (MID) AF: 0.00 AC: 0 AN: 1606

European-Non Finnish (NFE) AF: 0.00000465 AC: 1 AN: 214952

Other (OTH) AF: 0.00 AC: 0 AN: 21230

GnomAD4 genome Cov.: 32

ClinVar

ClinVar submissions as Germline

Significance: Uncertain significance

Revision: criteria provided, single submitter

Pathogenic	VUS	Benign	Condition
-	1	-	Hypercholesterolemia, familial, 1 (1)

Computational scores

Source: dbNSFP v4.9

Name	Calibrated prediction	Score	Prediction
PhyloP100		4.2

Splicing

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

Other links and lift over

dbSNP: rs879254359; hg19: chr19-11200000;