rs121908025

Positions:

• chr19-11102732-T-C
• chr19-11102732-T-G

Variant summary

Our verdict is Uncertain significance. Variant got 5 ACMG points: 5P and 0B. PM5 PM2 PP3

This summary comes from the ClinGen Evidence Repository: The NM_000527.5(LDLR):c.259T>C (p.Trp87Arg) variant is classified as Uncertain significance - insufficient evidence for Familial Hypercholesterolemia by applying evidence codes (PM2, PM5 and PP3) 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), so PM2 is met.PM5 - 1 other missense variant in the same codon:- NM_000527.5(LDLR):c.259T>G (p.Trp87Gly) - Pathogenic by expert panel in ClinVar,so PM5 is met.PP3 - REVEL = 0.891. It is above 0.75, so PP3 is met. LINK:https://erepo.genome.network/evrepo/ui/classification/CA404075655/MONDO:0007750/013

• Frequency: Genomes: not found (cov: 31)
• Consequence: LDLR NM_000527.5 missense
• Clinical Significance: Uncertain significance reviewed by expert panel P:1 U:1
• Conservation: PhyloP100: 6.03

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]

ACMG classification

Verdict is Uncertain_significance. Variant got 5 ACMG points.

Transcripts

RefSeq

Gene	Transcript	HGVSc	HGVSp	Effect	#exon/exons	MANE	UniProt
LDLR	NM_000527.5	c.259T>C	p.Trp87Arg	missense_variant	3/18	ENST00000558518.6

Ensembl

Gene	Transcript	HGVSc	HGVSp	Effect	#exon/exons	TSL	MANE	Appris	UniProt
LDLR	ENST00000558518.6	c.259T>C	p.Trp87Arg	missense_variant	3/18	1	NM_000527.5	P3

Frequencies

GnomAD3 genomes Cov.: 31

GnomAD4 exome Cov.: 31

GnomAD4 genome Cov.: 31

ClinVar

Significance: Uncertain significance

Submissions summary: Pathogenic:1 Uncertain:1

Revision: reviewed by expert panel

Submissions by phenotype

Hypercholesterolemia, familial, 1 Pathogenic:1 Uncertain:1

Uncertain significance, reviewed by expert panel	curation	ClinGen Familial Hypercholesterolemia Variant Curation Expert Panel	Dec 13, 2021	The NM_000527.5(LDLR):c.259T>C (p.Trp87Arg) variant is classified as Uncertain significance - insufficient evidence for Familial Hypercholesterolemia by applying evidence codes (PM2, PM5 and PP3) 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), so PM2 is met. PM5 - 1 other missense variant in the same codon: - NM_000527.5(LDLR):c.259T>G (p.Trp87Gly) - Pathogenic by expert panel in ClinVar, so PM5 is met. PP3 - REVEL = 0.891. It is above 0.75, so PP3 is met. -
Pathogenic, no assertion criteria provided	research	Laboratorium voor Moleculaire Diagnostiek Experimentele Vasculaire Geneeskunde, Academisch Medisch Centrum	-	- -

Computational scores

Source: dbNSFP v4.3

Name	Calibrated prediction	Score	Prediction
AlphaMissense	Pathogenic	0.96
BayesDel_addAF	Pathogenic	0.52	D
BayesDel_noAF	Pathogenic	0.51
CADD	Pathogenic	28
DANN	Uncertain	1.0
DEOGEN2	Pathogenic	0.89	D;.;.;.;.
Eigen	Uncertain	0.63
Eigen_PC	Uncertain	0.60
FATHMM_MKL	Pathogenic	0.97	D
LIST_S2	Uncertain	0.90	D;D;D;D;D
M_CAP	Pathogenic	0.71	D
MetaRNN	Pathogenic	0.95	D;D;D;D;D
MetaSVM	Pathogenic	1.1	D
MutationAssessor	Uncertain	2.4	M;.;M;M;M
MutationTaster	Benign	1.0	D;D;D;D;D;D;N
PrimateAI	Uncertain	0.64	T
PROVEAN	Pathogenic	-13	D;D;D;D;D
Sift	Pathogenic	0.0	D;D;T;D;D
Sift4G	Pathogenic	0.0	D;D;T;D;D
Polyphen		1.0	D;.;.;.;.
Vest4		0.88
MutPred		0.70		Gain of relative solvent accessibility (P = 0.0999);Gain of relative solvent accessibility (P = 0.0999);Gain of relative solvent accessibility (P = 0.0999);Gain of relative solvent accessibility (P = 0.0999);Gain of relative solvent accessibility (P = 0.0999);
MVP		1.0
MPC		1.1
ClinPred		1.0	D
GERP RS		5.7
RBP_binding_hub_radar		0.92
RBP_regulation_power_radar		2.6
Varity_R		0.96
gMVP		0.98

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

LitVar

Other links and lift over

dbSNP: rs121908025; hg19: chr19-11213408;