rs539080792

Positions:

• chr19-11110720-G-A

Variant summary

Our verdict is Uncertain significance. Variant got 4 ACMG points: 4P and 0B. PM1 PM2

The NM_000527.5(LDLR):​c.1009G>A​(p.Glu337Lys) variant causes a missense change involving the alteration of a non-conserved nucleotide. The variant allele was found at a frequency of 0.0000539 in 1,613,842 control chromosomes in the GnomAD database, with no homozygous occurrence. Variant has been reported in ClinVar as Conflicting classifications of pathogenicity (no stars).

• Frequency:
  • Genomes: 𝑓 0.00018 (0 hom., cov: 32)
  • Exomes 𝑓: 0.000040 (0 hom.)
• Consequence: LDLR NM_000527.5 missense
• Clinical Significance: Conflicting classifications of pathogenicity criteria provided, conflicting classifications U:8 B:1
• Conservation: PhyloP100: 2.74

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 (HGNC:):

ACMG classification

Verdict is Uncertain_significance. Variant got 4 ACMG points.

• PM1: In a strand (size 2) in uniprot entity LDLR_HUMAN there are 9 pathogenic changes around while only 0 benign (100%) in NM_000527.5
• PM2: Very rare variant in population databases, with high coverage

Transcripts

RefSeq

Gene	Transcript	HGVSc	HGVSp	Effect	#exon/exons	MANE	Protein	UniProt
LDLR	NM_000527.5	c.1009G>A	p.Glu337Lys	missense_variant	7/18	ENST00000558518.6	NP_000518.1

Ensembl

Gene	Transcript	HGVSc	HGVSp	Effect	#exon/exons	TSL	MANE	Protein	Appris	UniProt
LDLR	ENST00000558518.6	c.1009G>A	p.Glu337Lys	missense_variant	7/18	1	NM_000527.5	ENSP00000454071.1

Frequencies

GnomAD3 genomes AF: 0.000184 AC: 28 AN: 152156 Hom.: 0 Cov.: 32

Gnomad AFR AF: 0.000241

Gnomad AMI AF: 0.00

Gnomad AMR AF: 0.000918

Gnomad ASJ AF: 0.00

Gnomad EAS AF: 0.00

Gnomad SAS AF: 0.000830

Gnomad FIN AF: 0.00

Gnomad MID AF: 0.00

Gnomad NFE AF: 0.00

Gnomad OTH AF: 0.00

GnomAD3 exomes AF: 0.000104 AC: 26 AN: 251000 Hom.: 0 AF XY: 0.000125 AC XY: 17 AN XY: 135808

Gnomad AFR exome AF: 0.000123

Gnomad AMR exome AF: 0.0000578

Gnomad ASJ exome AF: 0.00

Gnomad EAS exome AF: 0.0000544

Gnomad SAS exome AF: 0.000621

Gnomad FIN exome AF: 0.00

Gnomad NFE exome AF: 0.00

Gnomad OTH exome AF: 0.000326

GnomAD4 exome AF: 0.0000404 AC: 59 AN: 1461568 Hom.: 0 Cov.: 31 AF XY: 0.0000495 AC XY: 36 AN XY: 727078

Gnomad4 AFR exome AF: 0.000179

Gnomad4 AMR exome AF: 0.0000671

Gnomad4 ASJ exome AF: 0.00

Gnomad4 EAS exome AF: 0.0000504

Gnomad4 SAS exome AF: 0.000429

Gnomad4 FIN exome AF: 0.00

Gnomad4 NFE exome AF: 0.00000270

Gnomad4 OTH exome AF: 0.000132

GnomAD4 genome AF: 0.000184 AC: 28 AN: 152274 Hom.: 0 Cov.: 32 AF XY: 0.000175 AC XY: 13 AN XY: 74452

Gnomad4 AFR AF: 0.000241

Gnomad4 AMR AF: 0.000917

Gnomad4 ASJ AF: 0.00

Gnomad4 EAS AF: 0.00

Gnomad4 SAS AF: 0.000830

Gnomad4 FIN AF: 0.00

Gnomad4 NFE AF: 0.00

Gnomad4 OTH AF: 0.00

Bravo AF: 0.000196

ExAC AF: 0.000148 AC: 18

Asia WGS AF: 0.000577 AC: 2 AN: 3478

ClinVar

Significance: Conflicting classifications of pathogenicity

Submissions summary: Uncertain:8 Benign:1

Revision: criteria provided, conflicting classifications

Submissions by phenotype

Hypercholesterolemia, familial, 1 Uncertain:3

Uncertain significance, criteria provided, single submitter	clinical testing	All of Us Research Program, National Institutes of Health	Sep 23, 2024	This missense variant (also known as p.Glu316Lys in the mature protein) replaces glutamic acid with lysine at codon 337 of the LDLR protein. Computational prediction tools and conservation analyses are inconclusive regarding the impact of this variant on the protein function. Computational splicing tools suggest that this variant may not impact RNA splicing. To our knowledge, functional assays have not been performed for this variant. This variant has been reported in four individuals affected with familial hypercholesterolemia (PMID: 28964736, 29353225, 29396260; Shakhtshneider et al., 2017). This variant has also been identified in 30/282380 chromosomes (19/30612 South Asian chromosomes) in the general population by the Genome Aggregation Database (gnomAD). The available evidence is insufficient to determine the role of this variant in disease conclusively. Therefore, this variant is classified as a Variant of Uncertain Significance. -
Uncertain significance, criteria provided, single submitter	research	Iberoamerican FH Network	Mar 01, 2016	- -
Uncertain significance, criteria provided, single submitter	clinical testing	Fulgent Genetics, Fulgent Genetics	Dec 28, 2021	- -

Familial hypercholesterolemia Uncertain:3

Uncertain significance, criteria provided, single submitter	clinical testing	Labcorp Genetics (formerly Invitae), Labcorp	May 29, 2022	This sequence change replaces glutamic acid, which is acidic and polar, with lysine, which is basic and polar, at codon 337 of the LDLR protein (p.Glu337Lys). This variant is present in population databases (rs539080792, gnomAD 0.06%). This missense change has been observed in individual(s) with familial hypercholesterolemia (PMID: 29353225, 29396260). ClinVar contains an entry for this variant (Variation ID: 523729). Algorithms developed to predict the effect of missense changes on protein structure and function output the following: SIFT: "Tolerated"; PolyPhen-2: "Benign"; Align-GVGD: "Class C0". The lysine amino acid residue is found in multiple mammalian species, which suggests that this missense change does not adversely affect protein function. 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. -
Uncertain significance, criteria provided, single submitter	clinical testing	Color Diagnostics, LLC DBA Color Health	Jun 15, 2023	This missense variant (also known as p.Glu316Lys in the mature protein) replaces glutamic acid with lysine at codon 337 of the LDLR protein. Computational prediction suggests that this variant may not impact protein structure and function (internally defined REVEL score threshold <= 0.5, PMID: 27666373). To our knowledge, functional studies have not been reported for this variant. This variant has been reported in four individuals affected with familial hypercholesterolemia (PMID: 28964736, 29353225, 29396260, 34834584; Color internal data). This variant has also been identified in 30/282380 chromosomes in the general population by the Genome Aggregation Database (gnomAD). The available evidence is insufficient to determine the role of this variant in disease conclusively. Therefore, this variant is classified as a Variant of Uncertain Significance. -
Uncertain significance, no assertion criteria provided	clinical testing	Natera, Inc.	Mar 04, 2020	- -

not provided Uncertain:2

Uncertain significance, criteria provided, single submitter	clinical testing	GeneDx	Mar 14, 2023	In silico analysis supports that this missense variant has a deleterious effect on protein structure/function; This variant is associated with the following publications: (PMID: 28964736, 33418990, 34834584, 29396260, 29353225) -
Uncertain significance, criteria provided, single submitter	clinical testing	Quest Diagnostics Nichols Institute San Juan Capistrano	Aug 27, 2020	- -

Cardiovascular phenotype Benign:1

Likely benign, criteria provided, single submitter

clinical testing

Ambry Genetics

Oct 27, 2022

This alteration is classified as likely benign based on a combination of the following: seen in unaffected individuals, population frequency, intact protein function, lack of segregation with disease, co-occurrence, RNA analysis, in silico models, amino acid conservation, lack of disease association in case-control studies, and/or the mechanism of disease or impacted region is inconsistent with a known cause of pathogenicity. -

Computational scores

Source: dbNSFP v4.3

Name	Calibrated prediction	Score	Prediction
AlphaMissense	Benign	0.11
BayesDel_addAF	Benign	-0.093	T
BayesDel_noAF	Uncertain	-0.010
CADD	Benign	18
DANN	Uncertain	0.98
DEOGEN2	Uncertain	0.79	D;.;.;.;.;.
Eigen	Benign	-0.84
Eigen_PC	Benign	-0.81
FATHMM_MKL	Uncertain	0.96	D
LIST_S2	Uncertain	0.89	D;D;D;D;D;D
M_CAP	Pathogenic	0.46	D
MetaRNN	Uncertain	0.45	T;T;T;T;T;T
MetaSVM	Uncertain	0.32	D
MutationAssessor	Benign	0.12	N;.;.;.;.;N
PrimateAI	Benign	0.31	T
PROVEAN	Uncertain	-3.1	D;D;D;D;D;D
REVEL	Uncertain	0.48
Sift	Benign	0.036	D;T;T;D;D;D
Sift4G	Benign	0.16	T;T;T;T;T;T
Polyphen		0.28	B;.;.;.;.;.
Vest4		0.49
MutPred		0.59		Gain of methylation at E337 (P = 0.0038);Gain of methylation at E337 (P = 0.0038);.;.;.;Gain of methylation at E337 (P = 0.0038);
MVP		1.0
MPC		0.25
ClinPred		0.069	T
GERP RS		0.62
Varity_R		0.58
gMVP		0.92

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: rs539080792; hg19: chr19-11221396;