rs72658855

Variant summary

Our verdict is Uncertain significance. Variant got 2 ACMG points: 4P and 2B. PM1PM2BP4_Moderate

The NM_000527.5(LDLR):ā€‹c.90C>Gā€‹(p.Asn30Lys) variant causes a missense change involving the alteration of a non-conserved nucleotide. The variant allele was found at a frequency of 0.00000274 in 1,461,256 control chromosomes in the GnomAD database, with no homozygous occurrence. In-silico tool predicts a benign outcome for this variant. 12/21 in silico tools predict a benign outcome for this variant. Variant has been reported in ClinVar as Uncertain significance (ā˜…ā˜…). Synonymous variant affecting the same amino acid position (i.e. N30N) has been classified as Benign.

Frequency

Genomes: not found (cov: 33)
Exomes š‘“: 0.0000027 ( 0 hom. )

Consequence

LDLR
NM_000527.5 missense

Scores

4
15

Clinical Significance

Uncertain significance criteria provided, multiple submitters, no conflicts U:5

Conservation

PhyloP100: -1.90
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]

Genome browser will be placed here

ACMG classification

Classification made for transcript

Verdict is Uncertain_significance. Variant got 2 ACMG points.

PM1
In a strand (size 4) in uniprot entity LDLR_HUMAN there are 4 pathogenic changes around while only 0 benign (100%) in NM_000527.5
PM2
Very rare variant in population databases, with high coverage;
BP4
Computational evidence support a benign effect (MetaRNN=0.123405874).

Transcripts

RefSeq

Gene Transcript HGVSc HGVSp Effect #exon/exons MANE Protein UniProt
LDLRNM_000527.5 linkuse as main transcriptc.90C>G p.Asn30Lys missense_variant 2/18 ENST00000558518.6 NP_000518.1 P01130-1A0A024R7D5

Ensembl

Gene Transcript HGVSc HGVSp Effect #exon/exons TSL MANE Protein Appris UniProt
LDLRENST00000558518.6 linkuse as main transcriptc.90C>G p.Asn30Lys missense_variant 2/181 NM_000527.5 ENSP00000454071.1 P01130-1

Frequencies

GnomAD3 genomes
Cov.:
33
GnomAD4 exome
AF:
0.00000274
AC:
4
AN:
1461256
Hom.:
0
Cov.:
31
AF XY:
0.00000275
AC XY:
2
AN XY:
726892
show subpopulations
Gnomad4 AFR exome
AF:
0.0000896
Gnomad4 AMR exome
AF:
0.00
Gnomad4 ASJ exome
AF:
0.00
Gnomad4 EAS exome
AF:
0.00
Gnomad4 SAS exome
AF:
0.00
Gnomad4 FIN exome
AF:
0.00
Gnomad4 NFE exome
AF:
0.00
Gnomad4 OTH exome
AF:
0.0000166
GnomAD4 genome
Cov.:
33

ClinVar

Significance: Uncertain significance
Submissions summary: Uncertain:5
Revision: criteria provided, multiple submitters, no conflicts
LINK: link

Submissions by phenotype

Familial hypercholesterolemia Uncertain:2
Uncertain significance, no assertion criteria providedclinical testingNatera, Inc.Sep 16, 2020- -
Uncertain significance, criteria provided, single submitterclinical testingLabcorp Genetics (formerly Invitae), LabcorpSep 17, 2021This sequence change replaces asparagine with lysine at codon 30 of the LDLR protein (p.Asn30Lys). The asparagine residue is moderately conserved and there is a moderate physicochemical difference between asparagine and lysine. This variant is not present in population databases (ExAC no frequency). This variant has not been reported in the literature in individuals with LDLR-related conditions. ClinVar contains an entry for this variant (Variation ID: 453084). 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, suggesting that this missense change does not adversely affect protein function. These predictions have not been confirmed by published functional studies and their clinical significance is uncertain. 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. -
not specified Uncertain:1
Uncertain significance, criteria provided, single submitterclinical testingWomen's Health and Genetics/Laboratory Corporation of America, LabCorpAug 03, 2024- -
Hypercholesterolemia, familial, 1 Uncertain:1
Uncertain significance, criteria provided, single submitterclinical testingAll of Us Research Program, National Institutes of HealthJun 26, 2023This missense variant (also known as p.Asn9Lys in the mature protein) replaces asparagine with lysine at codon 30 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 not been reported in individuals affected with LDLR-related disorders in the literature. This variant has not been identified 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. -
not provided Uncertain:1
Uncertain significance, criteria provided, single submitterclinical testingGeneDxApr 15, 2024Has not been previously published as pathogenic or benign to our knowledge; Not observed at significant frequency in large population cohorts (gnomAD); In silico analysis supports that this missense variant has a deleterious effect on protein structure/function -

Computational scores

Source: dbNSFP v4.3

Name
Calibrated prediction
Score
Prediction
AlphaMissense
Benign
0.24
BayesDel_addAF
Uncertain
0.029
T
BayesDel_noAF
Benign
-0.20
CADD
Benign
0.027
DANN
Benign
0.94
DEOGEN2
Uncertain
0.77
D;.;.;.;.;.
Eigen
Benign
-1.4
Eigen_PC
Benign
-1.5
FATHMM_MKL
Benign
0.21
N
LIST_S2
Benign
0.59
T;T;T;T;T;T
M_CAP
Uncertain
0.17
D
MetaRNN
Benign
0.12
T;T;T;T;T;T
MetaSVM
Benign
-0.31
T
MutationAssessor
Benign
1.5
L;.;L;L;L;L
PrimateAI
Benign
0.44
T
PROVEAN
Benign
-2.2
N;N;N;N;D;N
REVEL
Uncertain
0.33
Sift
Benign
0.11
T;T;T;D;T;T
Sift4G
Benign
0.14
T;T;T;T;T;T
Polyphen
0.039
B;.;.;.;.;.
Vest4
0.22
MutPred
0.53
Gain of ubiquitination at N30 (P = 0.0117);Gain of ubiquitination at N30 (P = 0.0117);Gain of ubiquitination at N30 (P = 0.0117);Gain of ubiquitination at N30 (P = 0.0117);Gain of ubiquitination at N30 (P = 0.0117);Gain of ubiquitination at N30 (P = 0.0117);
MVP
0.89
MPC
0.28
ClinPred
0.15
T
GERP RS
-11
Varity_R
0.26
gMVP
0.96

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

Below is the list of publications found by LitVar. It may be empty.

Other links and lift over

dbSNP: rs72658855; hg19: chr19-11210921; API