NM_000527.5(LDLR):c.1055G>A (p.Cys352Tyr) AND Hypercholesterolemia, familial, 1

Germline classification:: Likely pathogenic (10 submissions)
Last evaluated:: Jun 8, 2021
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:: RCV000030122.23

Allele description [Variation Report for NM_000527.5(LDLR):c.1055G>A (p.Cys352Tyr)]

NM_000527.5(LDLR):c.1055G>A (p.Cys352Tyr)

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.1055G>A (p.Cys352Tyr)

Other names:

NM_000527.5(LDLR):c.1055G>A

HGVS:

NC_000019.10:g.11110766G>A
NG_009060.1:g.26386G>A
NM_000527.5:c.1055G>AMANE SELECT
NM_001195798.2:c.1055G>A
NM_001195799.2:c.932G>A
NM_001195800.2:c.551G>A
NM_001195803.2:c.674G>A
NP_000518.1:p.Cys352Tyr
NP_000518.1:p.Cys352Tyr
NP_001182727.1:p.Cys352Tyr
NP_001182728.1:p.Cys311Tyr
NP_001182729.1:p.Cys184Tyr
NP_001182732.1:p.Cys225Tyr
LRG_274t1:c.1055G>A
LRG_274:g.26386G>A
LRG_274p1:p.Cys352Tyr
NC_000019.9:g.11221442G>A
NM_000527.4:c.1055G>A
P01130:p.Cys352Tyr
c.1055G>A

Protein change:

C184Y

Links:

LDLR-LOVD, British Heart Foundation: LDLR_001339; UniProtKB: P01130#VAR_005369; dbSNP: rs193922566

Molecular consequence:

NM_000527.5:c.1055G>A - missense variant - [Sequence Ontology: SO:0001583]
NM_001195798.2:c.1055G>A - missense variant - [Sequence Ontology: SO:0001583]
NM_001195799.2:c.932G>A - missense variant - [Sequence Ontology: SO:0001583]
NM_001195800.2:c.551G>A - missense variant - [Sequence Ontology: SO:0001583]
NM_001195803.2:c.674G>A - 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
SCV000295167	LDLR-LOVD, British Heart Foundation	criteria provided, single submitter (ACGS Guidelines, 2013)	Likely pathogenic (Mar 25, 2016)	germline	literature only	PubMed (3) [See all records that cite these PMIDs] 1301956, 22698793, 19318025 Citation Link,
SCV000540786	Molecular Genetics Laboratory, Centre for Cardiovascular Surgery and Transplantation See additional submitters Centre of Molecular Biology and Gene Therapy, University Hospital Brno	criteria provided, single submitter (ACMG Guidelines, 2015)	Likely pathogenic (Nov 5, 2016)	unknown	clinical testing	PubMed (2) [See all records that cite these PMIDs] 25741868, 22698793
SCV000606301	Laboratorium voor Moleculaire Diagnostiek Experimentele Vasculaire Geneeskunde, Academisch Medisch Centrum	no assertion criteria provided	Pathogenic	germline	research
SCV000607552	Fundacion Hipercolesterolemia Familiar - SAFEHEART	criteria provided, single submitter (ACMG Guidelines, 2015)	Likely pathogenic (Mar 1, 2016)	germline	research	PubMed (3) [See all records that cite these PMIDs] 25741868, 1301956, 19026292
SCV000748047	Iberoamerican FH Network	criteria provided, single submitter (ACMG Guidelines, 2015)	Likely pathogenic (Mar 1, 2016)	germline	research	PubMed (3) [See all records that cite these PMIDs] 25741868, 1301956, 19026292
SCV000894172	Fulgent Genetics, Fulgent Genetics	criteria provided, single submitter (ACMG Guidelines, 2015)	Pathogenic (Oct 31, 2018)	unknown	clinical testing	PubMed (1) [See all records that cite this PMID]
SCV001960921	ClinGen Familial Hypercholesterolemia Variant Curation Expert Panel	reviewed by expert panel (ClinGen FH ACMG Specifications v1-1)	Likely pathogenic (Jun 8, 2021)	germline	curation	Citation Link,
SCV002318891	3billion	criteria provided, single submitter (ACMG Guidelines, 2015)	Pathogenic (Mar 22, 2022)	germline	clinical testing	PubMed (7) [See all records that cite these PMIDs] 21376320, 9974426, 1301956, 21252755, 20809525, 17347910, 25741868
SCV002764476	New York Genome Center	criteria provided, single submitter (NYGC Assertion Criteria 2020)	Likely pathogenic (Nov 27, 2020)	germline	clinical testing	PubMed (7) [See all records that cite these PMIDs] 1301956, 19717150, 21722902, 22698793, 23064986, 25234566, 19026292 Citation Link,
SCV006322473	Revvity Omics, Revvity	criteria provided, single submitter (ACMG Guidelines, 2015)	Likely pathogenic (Aug 18, 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	5	not provided	not provided	5	not provided	literature only, clinical testing
not provided	germline	unknown	not provided	not provided	not provided	not provided	not provided	clinical testing, research, curation
not provided	unknown	unknown	not provided	not provided	not provided	not provided	not provided	clinical testing
Caucasian	unknown	yes	1	1	not provided	3964	not provided	clinical testing

Citations

PubMed

Genetic diagnosis of familial hypercholesterolemia using a DNA-array based platform.

Alonso R, Defesche JC, Tejedor D, Castillo S, Stef M, Mata N, Gomez-Enterria P, Martinez-Faedo C, Forga L, Mata P.

Clin Biochem. 2009 Jun;42(9):899-903. doi: 10.1016/j.clinbiochem.2009.01.017. Epub 2009 Feb 6.

PubMed [citation]

PMID:: 19318025

Array-based resequencing for mutations causing familial hypercholesterolemia.

Chiou KR, Charng MJ, Chang HM.

Atherosclerosis. 2011 Jun;216(2):383-9. doi: 10.1016/j.atherosclerosis.2011.02.006. Epub 2011 Mar 3.

PubMed [citation]

PMID:: 21376320

See all PubMed Citations (14)

PMC

Standards and guidelines for the interpretation of sequence variants: a joint consensus recommendation of the American College of Medical Genetics and Genomics and the Association for Molecular Pathology..

Richards S, Aziz N, Bale S, Bick D, Das S, Gastier-Foster J, Grody WW, Hegde M, Lyon E, Spector E, Voelkerding K, Rehm HL, ACMG Laboratory Quality Assurance Committee.

Genetics in medicine : official journal of the American College of Medical Genetics. 2015 May; 17(5): 405-24

PMC [article]

PMCID:: PMC4544753
PMID:: 25741868
DOI:: 10.1038/gim.2015.30

Details of each submission

From LDLR-LOVD, British Heart Foundation, SCV000295167.2

#	Ethnicity	Individuals	Chromosomes Tested	Family History	Method	Citations
1	not provided	1	not provided	not provided	literature only	PubMed (3)
2	not provided	1	not provided	not provided	literature only	PubMed (3)
3	not provided	1	not provided	not provided	literature only	PubMed (3)

#	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
3	germline	yes	1	not provided	not provided		1	not provided	not provided	not provided

From Molecular Genetics Laboratory, Centre for Cardiovascular Surgery and Transplantation, SCV000540786.2

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

Description

Disrupt disulfide bridge between Cys340 and Cys352.

#	Sample				Method		Observation
#	Origin	Affected	Number tested	Tissue	Purpose	Method	Individuals	Allele frequency	Families	Co-occurrences
1	unknown	yes	3964	Whole blood	not provided		1	not provided	1	not provided

From Laboratorium voor Moleculaire Diagnostiek Experimentele Vasculaire Geneeskunde, Academisch Medisch Centrum, SCV000606301.1

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

#	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 Fundacion Hipercolesterolemia Familiar - SAFEHEART, SCV000607552.1

#	Ethnicity	Individuals	Chromosomes Tested	Family History	Method	Citations
1	not provided	not provided	not provided	not provided	research	PubMed (3)
2	not provided	not provided	not provided	not provided	research	PubMed (3)

Description

%MAF(ExAC):0.000827

"Comp htz (with p.(Cys364Arg) / unknown) patients' fibroblasts, 125I-LDL assays"

PubMed [ID: 1301956]

#	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
2	germline	unknown	not provided	not provided	not provided		not provided	not provided	not provided	not provided

From Iberoamerican FH Network, SCV000748047.1

#	Ethnicity	Individuals	Chromosomes Tested	Family History	Method	Citations
1	not provided	not provided	not provided	not provided	research	PubMed (3)
2	not provided	not provided	not provided	not provided	research	PubMed (3)

Description

%MAF(ExAC):0.000827

"Assay Description:Comp htz (with p.(Cys364Arg) / unknown) patients' fibroblasts, 125I-LDL assays"

PubMed [ID: 1301956]

#	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
2	germline	unknown	not provided	not provided	not provided		not provided	not provided	not provided	not provided

From Fulgent Genetics, Fulgent Genetics, SCV000894172.1

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

From ClinGen Familial Hypercholesterolemia Variant Curation Expert Panel, SCV001960921.1

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

Description

NM_000527.5(LDLR):c.1055G>A (p.Cys352Tyr) variant is classified as Likely pathogenic for Familial Hypercholesterolemia by applying evidence codes (PM1, PM2, PP3, PP4 and PS4_Supporting) as defined by the ClinGen Familial Hypercholesterolemia Expert Panel LDLR-specific variant curation guidelines (https://doi.org/10.1101/2021.03.17.21252755). The supporting evidence is as follows: PM1 - Variant meets PM2 and alters Cys340, one of the cysteine residues listed. PM2 - PopMax MAF = 0.00005782 (0.006%) in Latino/Admixed American exomes (gnomAD v2.1.1). PP3 - REVEL: 0,98. PP4 - Variant meets PM2. Identified in 1 FH case from Center of molecular biology and gene therapy who fulfills Simon-Broome criteria and in 1 FH case published in PMID: 30592178 who fulfills DLCN criteria. PS4_supporting - Variant meets PM2. Variant identified in 2 index cases with clinical FH criteria.

#	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 3billion, SCV002318891.1

#	Ethnicity	Individuals	Chromosomes Tested	Family History	Method	Citations
1	not provided	1	not provided	not provided	clinical testing	PubMed (7)

Description

Same nucleotide change resulting in same amino acid change has been previously reported as pathogenic/likely pathogenic with strong evidence (ClinVar ID: VCV000036450, PMID:1301956). Different missense change at the same codon have been reported as pathogenic/likely pathogenic with strong evidence (ClinVar ID: VCV000251617,VCV000251618,VCV000251619,VCV000251622, PMID:21376320,17347910, 20809525, 9974426). The variant is located in a mutational hot spot and/or well-established functional domain in which established pathogenic variants have been reported. In silico tool predictions suggest damaging effect of the variant on gene or gene product (REVEL: 0.98>=0.6, 3CNET: 0.99>=0.75). It is observed at an extremely low frequency in the gnomAD v2.1.1 dataset (total allele frequency: 0.000008). Therefore, this variant is classified as pathogenic according to the recommendation of ACMG/AMP guideline.

#	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

From New York Genome Center, SCV002764476.1

#	Ethnicity	Individuals	Chromosomes Tested	Family History	Method	Citations
1	not provided	1	not provided	not provided	clinical testing	PubMed (7)

Description

The c.1055G>A(p.Cys352Tyr) missense variant (also previously known asp.Cys331Tyr and FH-Mexico-2 allele) is localized in exon 7 of 18 of LDLR in the EGF-like domain. This variant has been identified in multiple individuals diagnosed with hypercholesterolemia in heterozygous, homozygous and compound heterozygous states [PMIDs:1301956, 19717150, 21722902, 22698793, 23064986, 25234566]. Experimental studies have shown that this variant results in a significantly reduced LDLR activity in cells from patients [PMIDs: 1301956, 19026292]. This variant is absent in gnomADv3 and present in gnomADv2 at a very low frequency (2/250660alleles, allele frequency = 0.000007979; no homozygoytes) indicating it is not a common benign variant in the populations represented in this database. In silico predictors suggest this variant is Damaging (Provean; score: -10.55;SIFT; score:0). This variant has been reported in Clinvar as a Pathogenic /Likely Pathogenic variant [Variation ID:36450]. Missense variants at the same residue (Cys352Ser, Cys352Arg, Cys352Phe, Cys352Trp) have also been reported in affected individuals with familial hypercholesterolemia. Given the current evidence regarding its pathogenicity, the c.1055G>A(p.Cys352Tyr) variant identified in the LDLR gene is reported as Likely Pathogenic.

#	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

From Revvity Omics, Revvity, SCV006322473.1

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

Last Updated: Aug 4, 2026

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