NM_000527.5(LDLR):c.226G>T (p.Gly76Trp) AND Hypercholesterolemia, familial, 1

Germline classification:: Uncertain significance (6 submissions)
Last evaluated:: Apr 28, 2023
Review status:: 3 stars out of maximum of 4 stars
reviewed by expert panel

Somatic classification of clinical impact:: None
Review status:: (0/4) 0 stars out of maximum of 4 stars
no assertion criteria provided

Somatic classification of oncogenicity:: None
Review status:: (0/4) 0 stars out of maximum of 4 stars
no assertion criteria provided

Record status:: current
Accession:: RCV000237270.7

Allele description [Variation Report for NM_000527.5(LDLR):c.226G>T (p.Gly76Trp)]

NM_000527.5(LDLR):c.226G>T (p.Gly76Trp)

Gene:

LDLR:low density lipoprotein receptor [Gene - OMIM - HGNC]

Variant type:

single nucleotide variant

Cytogenetic location:

19p13.2

Genomic location:

Preferred name:

NM_000527.5(LDLR):c.226G>T (p.Gly76Trp)

Other names:

NM_000527.5(LDLR):c.226G>T

HGVS:

NC_000019.10:g.11102699G>T
NG_009060.1:g.18319G>T
NM_000527.5:c.226G>TMANE SELECT
NM_001195798.2:c.226G>T
NM_001195799.2:c.190+2354G>T
NM_001195800.2:c.226G>T
NM_001195803.2:c.226G>T
NP_000518.1:p.Gly76Trp
NP_000518.1:p.Gly76Trp
NP_001182727.1:p.Gly76Trp
NP_001182729.1:p.Gly76Trp
NP_001182732.1:p.Gly76Trp
LRG_274t1:c.226G>T
LRG_274:g.18319G>T
NC_000019.9:g.11213375G>T
NM_000527.4(LDLR):c.226G>T
NM_000527.4:c.226G>T
c.226G>T

Protein change:

G76W

Links:

LDLR-LOVD, British Heart Foundation: LDLR_000035; dbSNP: rs574337291

NCBI 1000 Genomes Browser:

rs574337291

Molecular consequence:

NM_001195799.2:c.190+2354G>T - intron variant - [Sequence Ontology: SO:0001627]
NM_000527.5:c.226G>T - missense variant - [Sequence Ontology: SO:0001583]
NM_001195798.2:c.226G>T - missense variant - [Sequence Ontology: SO:0001583]
NM_001195800.2:c.226G>T - missense variant - [Sequence Ontology: SO:0001583]
NM_001195803.2:c.226G>T - missense variant - [Sequence Ontology: SO:0001583]

Observations:

Condition(s)

Name:: Hypercholesterolemia, familial, 1
Synonyms:: LDL RECEPTOR DISORDER; Hyperlipoproteinemia Type IIa; HYPER-LOW-DENSITY-LIPOPROTEINEMIA; See all synonyms [MedGen]
Identifiers:: MONDO: MONDO:0007750; MedGen: C0745103; Orphanet: 391665; OMIM: 143890

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Submission Accession	Submitter	Review Status (Assertion method)	Clinical Significance (Last evaluated)	Origin	Method	Citations
SCV000294538	LDLR-LOVD, British Heart Foundation	criteria provided, single submitter (ACGS Guidelines, 2013)	Likely benign (Mar 25, 2016)	germline	literature only	PubMed (2) [See all records that cite these PMIDs] 17765246, 22881376 Citation Link,
SCV000322879	Cardiovascular Research Group, Instituto Nacional de Saude Doutor Ricardo Jorge	criteria provided, single submitter (ACMG Guidelines, 2015)	Uncertain significance (Mar 1, 2016)	germline	research	PubMed (2) [See all records that cite these PMIDs] 25741868, 25741862
SCV000503113	Centre de Génétique Moléculaire et Chromosomique, Unité de génétique de l'Obésité et des Dyslipidémies, APHP, GH Hôpitaux Universitaires Pitié-Salpêtrière / Charles-Foix	criteria provided, single submitter (ACMG Guidelines, 2015)	Likely pathogenic (Dec 16, 2016)	germline	clinical testing	PubMed (1) [See all records that cite this PMID]
SCV000583641	U4M - Lille University & CHRU Lille, Université de Lille - CHRU de Lille	criteria provided, single submitter (ACMG Guidelines, 2015)	Likely pathogenic (Mar 30, 2017)	germline	clinical testing	PubMed (1) [See all records that cite this PMID]
SCV004022425	ClinGen Familial Hypercholesterolemia Variant Curation Expert Panel	reviewed by expert panel (ClinGen FH ACMG Specifications v1-2)	Uncertain significance (Apr 28, 2023)	germline	curation	Citation Link,
SCV004820130	All of Us Research Program, National Institutes of Health	criteria provided, single submitter (ACMG Guidelines, 2015)	Likely Benign (Feb 24, 2023)	germline	clinical testing	PubMed (1) [See all records that cite this PMID]

Help

Summary from all submissions

Ethnicity	Origin	Affected	Individuals	Families	Chromosomes tested	Number Tested	Family history	Method
not provided	germline	yes	4	1	not provided	2602	not provided	clinical testing, research, literature only
not provided	germline	unknown	1	not provided	not provided	108544	not provided	clinical testing, curation

Citations

PubMed

Familial hypercholesterolaemia in Portugal.

Bourbon M, Alves AC, Medeiros AM, Silva S, Soutar AK; Investigators of Portuguese FH Study..

Atherosclerosis. 2008 Feb;196(2):633-42. Epub 2007 Aug 31.

PubMed [citation]

PMID:: 17765246

Low-density lipoprotein receptor gene familial hypercholesterolemia variant database: update and pathological assessment.

Usifo E, Leigh SE, Whittall RA, Lench N, Taylor A, Yeats C, Orengo CA, Martin AC, Celli J, Humphries SE.

Ann Hum Genet. 2012 Sep;76(5):387-401. doi: 10.1111/j.1469-1809.2012.00724.x.

PubMed [citation]

PMID:: 22881376

See all PubMed Citations (4)

Details of each submission

From LDLR-LOVD, British Heart Foundation, SCV000294538.2

#	Ethnicity	Individuals	Chromosomes Tested	Family History	Method	Citations
1	not provided	1	not provided	not provided	literature only	PubMed (2)
2	not provided	1	not provided	not provided	literature only	PubMed (2)

#	Sample				Method		Observation
#	Origin	Affected	Number tested	Tissue	Purpose	Method	Individuals	Allele frequency	Families	Co-occurrences
1	germline	yes	1	not provided	not provided		1	not provided	not provided	not provided
2	germline	yes	1	not provided	not provided		1	not provided	not provided	not provided

From Cardiovascular Research Group, Instituto Nacional de Saude Doutor Ricardo Jorge, SCV000322879.1

#	Ethnicity	Individuals	Chromosomes Tested	Family History	Method	Citations
1	not provided	not provided	not provided	not provided	research	PubMed (2)
2	not provided	not provided	not provided	not provided	research	PubMed (2)

Description

"Heterologous cells (CHO), FACS and WB assays"

PubMed [ID: 25741862]

Description

0/100 normolipidemic individuals

#	Sample				Method		Observation
#	Origin	Affected	Number tested	Tissue	Purpose	Method	Individuals	Allele frequency	Families	Co-occurrences
1	germline	yes	not provided	not provided	not provided		not provided	not provided	not provided	not provided
2	germline	yes	not provided	not provided	not provided		not provided	not provided	not provided	not provided

From Centre de Génétique Moléculaire et Chromosomique, Unité de génétique de l'Obésité et des Dyslipidémies, APHP, GH Hôpitaux Universitaires Pitié-Salpêtrière / Charles-Foix, SCV000503113.1

#	Ethnicity	Individuals	Chromosomes Tested	Family History	Method	Citations
1	not provided	1	not provided	not provided	clinical testing	PubMed (1)

Description

subject mutated among 2600 FH index cases screened = 1 , family member = 1 with co-segregation / mild phenotype / Software predictions: Damaging

#	Sample				Method		Observation
#	Origin	Affected	Number tested	Tissue	Purpose	Method	Individuals	Allele frequency	Families	Co-occurrences
1	germline	yes	2600	not provided	not provided		1	not provided	not provided	not provided

From U4M - Lille University & CHRU Lille, Université de Lille - CHRU de Lille, SCV000583641.1

#	Ethnicity	Individuals	Chromosomes Tested	Family History	Method	Citations
1	not provided	1	not provided	not provided	clinical testing	PubMed (1)

Description

Dutch Lipid Clinic Scoring : Definite FH

#	Sample				Method		Observation
#	Origin	Affected	Number tested	Tissue	Purpose	Method	Individuals	Allele frequency	Families	Co-occurrences
1	germline	yes	not provided	not provided	not provided		1	not provided	1	not provided

From ClinGen Familial Hypercholesterolemia Variant Curation Expert Panel, SCV004022425.1

#	Ethnicity	Individuals	Chromosomes Tested	Family History	Method	Citations
1	not provided	not provided	not provided	not provided	curation	not provided

Description

The NM_000527.5(LDLR):c.226G>T (p.Gly76Trp) variant is classified as Uncertain significance - conflicting evidence for Familial Hypercholesterolemia by applying evidence codes BS3, PS4_Supporting, PM2, PP1_Moderate, and PP4 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: BS3: Level 1 assays: PMID 25741862: Heterologous cells (CHO), western blot and flow cytometry assays - result: 100% low-density lipoprotein particle receptor biosynthetic process; 90% low-density lipoprotein particle binding; 95% low-density lipoprotein particle clearance. ---- The whole cycle is above 90% of wild-type activity. So, BS3 is met. PS4_Supporting: Variant meets PM2 and is identified in 2 index cases (1 case with DLCN criteria of definite FH from U4M - Lille University & CHRU Lille and 1 case with Simon Broome criteria of possible FH from Cardiovascular Research Group,Instituto Nacional de Saude Doutor Ricardo Jorge). So, PS4_Supporting is met. PM2: This variant is absent from gnomAD (gnomAD v2.1.1). So, PM2 is met. PP3: REVEL=0.898. It is above 0.75, so PP3 is met. PP1_Moderate: Variant segregates with FH phenotype in 4 informative meioses in 1 family from Cardiovascular Research Group,Instituto Nacional de Saude Doutor Ricardo Jorge. So, PP1_Moderate is met. PP4: Variant meets PM2 and is identified in 2 unrelated index cases who fulfill clinical criteria for FH from different labs, after alternative causes of high cholesterol were excluded (see PS4 for details). So, PP4 is met.

#	Sample				Method		Observation
#	Origin	Affected	Number tested	Tissue	Purpose	Method	Individuals	Allele frequency	Families	Co-occurrences
1	germline	unknown	not provided	not provided	not provided		not provided	not provided	not provided	not provided

From All of Us Research Program, National Institutes of Health, SCV004820130.1

#	Ethnicity	Individuals	Chromosomes Tested	Family History	Method	Citations
1	not provided	1	not provided	not provided	clinical testing	PubMed (1)

#	Sample				Method		Observation
#	Origin	Affected	Number tested	Tissue	Purpose	Method	Individuals	Allele frequency	Families	Co-occurrences
1	germline	unknown	108544	not provided	not provided		1	not provided	not provided	not provided

Last Updated: Sep 29, 2024

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