rs879255173

Variant names:

Variant summary

Our verdict is Uncertain significance. Variant got 3 ACMG points: 3P and 0B. PM2PP4

This summary comes from the ClinGen Evidence Repository: The NM_000527.5(LDLR):c.2297C>T (p.Thr766Ile) variant is classified as Uncertain significance - insufficient evidence for Familial Hypercholesterolemia by applying ACMG/AMP evidence codes PM2 and PP4 as defined by the ClinGen Familial Hypercholesterolemia Expert Panel LDLR-specific variant curation guidelines (specification version 1.2) on 28 October 2024. The supporting evidence is as follows: PM2: PopMax MAF = 0.00001098 (0.001098%) in South Asian exomes (gnomAD v4.1.0). PP4: Variant meets PM2 and is identified in one index case who fulfils DLCN criteria for probable FH after alternative causes of high cholesterol excluded, reported in PMID 16250003 (Fouchier et al., 2005), The Netherlands. LINK:https://erepo.genome.network/evrepo/ui/classification/CA10585816/MONDO:0007750/013

Frequency

Genomes: not found (cov: 32)

Exomes 𝑓: 0.0000014 ( 0 hom. )

Consequence

LDLR
NM_000527.5 missense

Scores

Clinical Significance

Uncertain significance reviewed by expert panel P:1U:4

Conservation

PhyloP100: 1.65

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]

LDLR links:

Genome browser will be placed here

ACMG classification

Classification made for transcript

Verdict is Uncertain_significance. Variant got 3 ACMG points.

PM2

For more information check the summary or visit ClinGen Evidence Repository.

PP4

For more information check the summary or visit ClinGen Evidence Repository.

Transcripts

RefSeq

Gene	Transcript	HGVSc	HGVSp	Effect	Exon rank	MANE	Protein	UniProt
LDLR	NM_000527.5 link	c.2297C>T	p.Thr766Ile	missense_variant	Exon 15 of 18	ENST00000558518.6	NP_000518.1	P01130-1A0A024R7D5

Ensembl

Gene	Transcript	HGVSc	HGVSp	Effect	Exon rank	TSL	MANE	Protein	Appris	UniProt
LDLR	ENST00000558518.6 link	c.2297C>T	p.Thr766Ile	missense_variant	Exon 15 of 18	1	NM_000527.5	ENSP00000454071.1		P01130-1

Frequencies

GnomAD3 genomes

Cov.:

GnomAD3 exomes

AF:

0.00000398

AC:

AN:

250998

Hom.:

AF XY:

0.00000737

AC XY:

AN XY:

135756

show subpopulations

Gnomad AFR exome

AF:

0.00

Gnomad AMR exome

AF:

0.00

Gnomad ASJ exome

AF:

0.00

Gnomad EAS exome

AF:

0.00

Gnomad SAS exome

AF:

0.0000327

Gnomad FIN exome

AF:

0.00

Gnomad NFE exome

AF:

0.00

Gnomad OTH exome

AF:

0.00

GnomAD4 exome

AF:

0.00000137

AC:

AN:

1461802

Hom.:

Cov.:

AF XY:

0.00000275

AC XY:

AN XY:

727186

show subpopulations

Gnomad4 AFR exome

AF:

0.00

Gnomad4 AMR exome

AF:

0.00

Gnomad4 ASJ exome

AF:

0.00

Gnomad4 EAS exome

AF:

0.00

Gnomad4 SAS exome

AF:

0.0000116

Gnomad4 FIN exome

AF:

0.00

Gnomad4 NFE exome

AF:

0.00

Gnomad4 OTH exome

AF:

0.0000166

GnomAD4 genome

Cov.:

ClinVar

Significance: Uncertain significance

Submissions summary: Pathogenic:1Uncertain:4

Revision: reviewed by expert panel

LINK: link

Submissions by phenotype

Hypercholesterolemia, familial, 1

Pathogenic:1Uncertain:3

Laboratorium voor Moleculaire Diagnostiek Experimentele Vasculaire Geneeskunde, Academisch Medisch Centrum

Significance: Pathogenic

Review Status: no assertion criteria provided

Collection Method: research

- -

Jul 14, 2021

Fulgent Genetics, Fulgent Genetics

Significance: Uncertain significance

Review Status: criteria provided, single submitter

Collection Method: clinical testing

- -

Oct 28, 2024

ClinGen Familial Hypercholesterolemia Variant Curation Expert Panel

Significance: Uncertain significance

Review Status: reviewed by expert panel

Collection Method: curation

The NM_000527.5(LDLR):c.2297C>T (p.Thr766Ile) variant is classified as Uncertain significance - insufficient evidence for Familial Hypercholesterolemia by applying ACMG/AMP evidence codes PM2 and PP4 as defined by the ClinGen Familial Hypercholesterolemia Expert Panel LDLR-specific variant curation guidelines (specification version 1.2) on 28 October 2024. The supporting evidence is as follows: PM2: PopMax MAF = 0.00001098 (0.001098%) in South Asian exomes (gnomAD v4.1.0). PP4: Variant meets PM2 and is identified in one index case who fulfils DLCN criteria for probable FH after alternative causes of high cholesterol excluded, reported in PMID 16250003 (Fouchier et al., 2005), The Netherlands. -

Mar 25, 2016

LDLR-LOVD, British Heart Foundation

Significance: Uncertain significance

Review Status: criteria provided, single submitter

Collection Method: literature only

- -

Cardiovascular phenotype

Uncertain:1

Jul 09, 2024

Ambry Genetics

Significance: Uncertain significance

Review Status: criteria provided, single submitter

Collection Method: clinical testing

The p.T766I variant (also known as c.2297C>T), located in coding exon 15 of the LDLR gene, results from a C to T substitution at nucleotide position 2297. The threonine at codon 766 is replaced by isoleucine, an amino acid with similar properties. This alteration has been reported in a familial hypercholesterolemia cohort (Fouchier SW et al. Hum Mutat, 2005 Dec;26:550-6). This amino acid position is highly conserved in available vertebrate species. In addition, this alteration is predicted to be deleterious by in silico analysis. Based on the available evidence, the clinical significance of this variant remains unclear. -

Computational scores

Source: dbNSFP v4.3

Name

Calibrated prediction

Score

Prediction

AlphaMissense

Benign

0.17

BayesDel_addAF

Pathogenic

0.33

BayesDel_noAF

Pathogenic

0.33

CADD

Benign

DANN

Uncertain

0.99

DEOGEN2

Pathogenic

0.81

D;.;.;.;.;.

Eigen

Benign

-0.028

Eigen_PC

Benign

-0.18

FATHMM_MKL

Benign

0.67

LIST_S2

Benign

0.79

T;T;T;T;T;T

M_CAP

Pathogenic

0.52

MetaRNN

Pathogenic

0.97

D;D;D;D;D;D

MetaSVM

Uncertain

0.24

MutationAssessor

Uncertain

2.4

M;.;.;.;.;M

PrimateAI

Benign

0.48

PROVEAN

Uncertain

-3.5

D;D;D;D;D;D

REVEL

Uncertain

0.59

Sift

Uncertain

0.0040

D;D;D;D;D;D

Sift4G

Uncertain

0.022

D;D;D;D;D;D

Polyphen

0.98

D;.;.;.;.;.

Vest4

0.63

MutPred

0.80

Loss of glycosylation at T766 (P = 0.0131);Loss of glycosylation at T766 (P = 0.0131);.;.;.;Loss of glycosylation at T766 (P = 0.0131);

MVP

1.0

MPC

0.47

ClinPred

0.93

GERP RS

4.4

RBP_binding_hub_radar

0.0

RBP_regulation_power_radar

1.1

Varity_R

0.20

gMVP

0.84

Splicing

Name

Calibrated prediction

Score

Prediction

SpliceAI score (max)

0.010

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.

Variant summary

Frequency

Consequence

Scores

Clinical Significance

Conservation

ACMG classification

Transcripts

RefSeq

Ensembl

Frequencies

ClinVar

Submissions by phenotype

Computational scores

Splicing

Publications

LitVar

Other links and lift over