rs763625913

chr19-11123341-C-Gchr19-11123341-C-T

Variant summary

Our verdict is Uncertain significance. Variant got 1 ACMG points: 2P and 1B. PM2 BP4

The NM_000527.5(LDLR):c.2308C>G(p.Gln770Glu) variant causes a missense change involving the alteration of a non-conserved nucleotide. The variant was absent in control chromosomes in GnomAD project. In-silico tool predicts a benign outcome for this variant. Variant has been reported in ClinVar as Uncertain significance (★).

• Frequency: Genomes: not found (cov: 32)
• Consequence: LDLR NM_000527.5 missense
• Clinical Significance: Uncertain significance criteria provided, single submitter U:1
• Conservation: PhyloP100: 0.532

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 1 ACMG points.

• PM2: Very rare variant in population databases, with high coverage
• BP4: Computational evidence support a benign effect (MetaRNN=0.2737554).

Transcripts

RefSeq

Gene	Transcript	HGVSc	HGVSp	Effect	#exon/exons	MANE	UniProt
LDLR	NM_000527.5	c.2308C>G	p.Gln770Glu	missense_variant	15/18	ENST00000558518.6

Ensembl

Gene	Transcript	HGVSc	HGVSp	Effect	#exon/exons	TSL	MANE	Appris	UniProt
LDLR	ENST00000558518.6	c.2308C>G	p.Gln770Glu	missense_variant	15/18	1	NM_000527.5	P3

Frequencies

GnomAD3 genomes Cov.: 32

GnomAD4 exome Cov.: 34

GnomAD4 genome Cov.: 32

ClinVar

Significance: Uncertain significance

Submissions summary: Uncertain:1

Revision: criteria provided, single submitter

Submissions by phenotype

Familial hypercholesterolemia Uncertain:1

Uncertain significance, criteria provided, single submitter

clinical testing

Color Diagnostics, LLC DBA Color Health

Feb 03, 2020

This missense variant (also known as p.Gln749Glu in the mature protein) replaces glutamine with glutamic acid at codon 770 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). Splice site prediction tools suggest that this variant may not impact RNA splicing. To our knowledge, functional studies have not been performed for this variant. This variant has not been reported in individuals affected with familial hypercholesterolemia 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. -

Computational scores

Source: dbNSFP v4.3

Name	Calibrated prediction	Score	Prediction
AlphaMissense	Benign	0.066
BayesDel_addAF	Uncertain	0.081	D
BayesDel_noAF	Benign	-0.12
Cadd	Benign	13
Dann	Benign	0.27
DEOGEN2	Benign	0.39	T;.;.;.;.;.
Eigen	Benign	-0.40
Eigen_PC	Benign	-0.35
FATHMM_MKL	Uncertain	0.81	D
LIST_S2	Benign	0.69	T;T;T;T;T;T
M_CAP	Pathogenic	0.42	D
MetaRNN	Benign	0.27	T;T;T;T;T;T
MetaSVM	Benign	-0.48	T
MutationAssessor	Uncertain	2.3	M;.;.;.;.;M
MutationTaster	Benign	0.97	N;N;N;N;N;N;N
PrimateAI	Benign	0.27	T
PROVEAN	Benign	-1.0	N;N;N;N;N;N
Sift	Benign	0.68	T;D;T;T;T;T
Sift4G	Benign	1.0	T;T;T;T;T;T
Polyphen		0.0050	B;.;.;.;.;.
Vest4		0.28
MutPred		0.49		Loss of sheet (P = 0.003);Loss of sheet (P = 0.003);.;.;.;Loss of sheet (P = 0.003);
MVP		1.0
MPC		0.26
ClinPred		0.10	T
GERP RS		3.3
RBP_binding_hub_radar		0.0
RBP_regulation_power_radar		2.8
Varity_R		0.14
gMVP		0.66

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: rs763625913; hg19: chr19-11234017;