chr19-11113504-GCGCTGATG-CGGCT

Variant names:

• chr19-11113504-GCGCTGATG-CGGCT
• rs879254876
• NM_000527.5:c.1359-31_1359-23delGCGCTGATGinsCGGCT

Variant summary

Our verdict is Uncertain significance. The variant received 4 ACMG points: 4P and 0B. PS3_Supporting PM2 PP4

This summary comes from the ClinGen Evidence Repository: The NM_000527.5(LDLR):c.1359-31_1359-23delinsCGGCT variant is classified as Uncertain significance - insufficient evidence for Familial Hypercholesterolemia by applying evidence codes (PM2, PP4, PS3_supporting) as defined by the ClinGen Familial Hypercholesterolemia Expert Panel LDLR-specific variant curation guidelines (https://doi.org/10.1016/j.gim.2021.09.012).The supporting evidence is as follows:- PM2: This variant is absent from gnomAD (gnomAD v2.1.1).- PP4: Variant meets PM2. Identified in 1 FH case from PMID:8872473 meeting Simon-Broome criteria of possible FH , after alternative causes of high cholesterol were excluded.- PS3: Level 3 assay: PMID 8872473:Heterozygous patient's Epstein-Barr virus transformed lymphoblasts, RNA assays; Heterologous cells (COS), RNA assays: Retention of intron 9 (p.Ser453Argfs*2)---- functional study is consistent with damaging effect. LINK:https://erepo.genome.network/evrepo/ui/classification/CA10585420/MONDO:0007750/013

• Frequency: Genomes: not found (cov: 29)
• Consequence: LDLR NM_000527.5 intron
• Clinical Significance: Uncertain significance reviewed by expert panel P:2 U:3 B:1
• Conservation: PhyloP100: 1.53
• Publications: 1 publications found

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]

MIR6886 (HGNC:50121): (microRNA 6886) microRNAs (miRNAs) are short (20-24 nt) non-coding RNAs that are involved in post-transcriptional regulation of gene expression in multicellular organisms by affecting both the stability and translation of mRNAs. miRNAs are transcribed by RNA polymerase II as part of capped and polyadenylated primary transcripts (pri-miRNAs) that can be either protein-coding or non-coding. The primary transcript is cleaved by the Drosha ribonuclease III enzyme to produce an approximately 70-nt stem-loop precursor miRNA (pre-miRNA), which is further cleaved by the cytoplasmic Dicer ribonuclease to generate the mature miRNA and antisense miRNA star (miRNA*) products. The mature miRNA is incorporated into a RNA-induced silencing complex (RISC), which recognizes target mRNAs through imperfect base pairing with the miRNA and most commonly results in translational inhibition or destabilization of the target mRNA. The RefSeq represents the predicted microRNA stem-loop. [provided by RefSeq, Sep 2009]

ACMG classification

Our verdict: Uncertain_significance. The variant received 4 ACMG points.

• PS3: For more information check the summary or visit ClinGen Evidence Repository.
• PM2: For more information check the summary or visit ClinGen Evidence Repository.
• PP4: For more information check the summary or visit ClinGen Evidence Repository.

Variant Effect in Transcripts

ACMG analysis was done for transcript: NM_000527.5. 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	NM_000527.5	MANE Select	c.1359-31_1359-23delGCGCTGATGinsCGGCT		intron	N/A	NP_000518.1	P01130-1
	LDLR	NM_001195798.2		c.1359-31_1359-23delGCGCTGATGinsCGGCT		intron	N/A	NP_001182727.1	P01130-5
	LDLR	NM_001195799.2		c.1236-31_1236-23delGCGCTGATGinsCGGCT		intron	N/A	NP_001182728.1	P01130-4

Ensembl Transcripts

Sel.	Gene	Transcript	Tags	HGVSc	HGVSp	Effect	Exon Rank	Protein	UniProt
	LDLR	ENST00000558518.6	TSL:1 MANE Select	c.1359-31_1359-23delGCGCTGATGinsCGGCT		intron	N/A	ENSP00000454071.1	P01130-1
	LDLR	ENST00000252444.10	TSL:1	c.1617-31_1617-23delGCGCTGATGinsCGGCT		intron	N/A	ENSP00000252444.6	J3KMZ9
	LDLR	ENST00000558013.5	TSL:1	c.1359-31_1359-23delGCGCTGATGinsCGGCT		intron	N/A	ENSP00000453346.1	P01130-5

Frequencies

GnomAD3 genomes Cov.: 29

We have no GnomAD4 exomes data on this position. Probably position not covered by the project.

GnomAD4 genome Cov.: 29

ClinVar

ClinVar submissions

Significance: Uncertain significance

Revision: reviewed by expert panel

Pathogenic	VUS	Benign	Condition
1	2	1	Hypercholesterolemia, familial, 1 (4)
1	-	-	Cardiovascular phenotype (1)
-	1	-	Familial hypercholesterolemia (1)

Computational scores

Source: dbNSFP v4.9

Name	Calibrated prediction	Score	Prediction
PhyloP100		1.5

Splicing

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

Other links and lift over

dbSNP: rs879254876; hg19: chr19-11224180;