<p>An evidence describes the source of an annotation, e.g. an experiment that has been published in the scientific literature, an orthologous protein, a record from another database, etc.</p>
<p><a href="/manual/evidences">More...</a></p>
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<p>The annotation score provides a heuristic measure of the annotation content of a UniProtKB entry or proteome. This score <strong>cannot</strong> be used as a measure of the accuracy of the annotation as we cannot define the 'correct annotation' for any given protein.<p><a href='/help/annotation_score' target='_top'>More...</a></p>-Experimental evidence at protein leveli
<p>This indicates the type of evidence that supports the existence of the protein. Note that the 'protein existence' evidence does not give information on the accuracy or correctness of the sequence(s) displayed.<p><a href='/help/protein_existence' target='_top'>More...</a></p>
Select a section on the left to see content.
<p>This section provides any useful information about the protein, mostly biological knowledge.<p><a href='/help/function_section' target='_top'>More...</a></p>Functioni
Binds LDL, the major cholesterol-carrying lipoprotein of plasma, and transports it into cells by endocytosis. In order to be internalized, the receptor-ligand complexes must first cluster into clathrin-coated pits.2 Publications
<p>Manually curated information for which there is published experimental evidence.</p>
<p><a href="/manual/evidences#ECO:0000269">More...</a></p>
Manual assertion based on experiment ini
Cited for: FUNCTION (MICROBIAL INFECTION), INTERACTION WITH VESICULAR STOMATITIS VIRUS GLYCOPROTEIN.
(Microbial infection) In case of HIV-1 infection, may function as a receptor for extracellular Tat in neurons, mediating its internalization in uninfected cells.1 Publication
clathrin heavy chain binding Source: BHF-UCL
<p>Traceable Author Statement</p>
<p>Used for information from review articles where the original experiments are traceable through that article and also for information from text books or dictionaries.</p>
<p>More information in the <a href="http://geneontology.org/page/guide%2Dgo%2Devidence%2Dcodes#tas">GO evidence code guide</a></p>
Traceable author statementi
identical protein binding Source: IntAct
<p>Inferred from Physical Interaction</p>
<p>Covers physical interactions between the gene product of interest and another molecule (or ion, or complex).</p>
<p>More information in the <a href="http://geneontology.org/page/guide%2Dgo%2Devidence%2Dcodes#ipi">GO evidence code guide</a></p>
Inferred from physical interactioni
low-density lipoprotein particle binding Source: BHF-UCL
<p>Inferred from Mutant Phenotype</p>
<p>Describes annotations that are concluded from looking at variations or changes in a gene product such as mutations or abnormal levels and includes techniques such as knockouts, overexpression, anti-sense experiments and use of specific protein inhibitors.</p>
<p>More information in the <a href="http://geneontology.org/page/guide%2Dgo%2Devidence%2Dcodes#imp">GO evidence code guide</a></p>
Inferred from mutant phenotypei
low-density lipoprotein particle receptor activity Source: BHF-UCL
<p>Inferred from Direct Assay</p>
<p>Used to indicate a direct assay for the function, process or component indicated by the GO term.</p>
<p>More information in the <a href="http://geneontology.org/page/guide%2Dgo%2Devidence%2Dcodes#ida">GO evidence code guide</a></p>
Inferred from direct assayi
long-term memory Source: ARUK-UCL
<p>Inferred from Genetic Interaction</p>
<p>Used to describe "traditional" genetic interactions such as suppressors and synthetic lethals as well as other techniques such as functional complementation, rescue experiments, or inferences about a gene drawn from the phenotype of a mutation in a different gene.</p>
<p>More information in the <a href="http://geneontology.org/page/guide%2Dgo%2Devidence%2Dcodes#igi">GO evidence code guide</a></p>
Inferred from genetic interactioni
<p>UniProtKB Keywords constitute a <a href="http://www.uniprot.org/keywords">controlled vocabulary</a> with a hierarchical structure. Keywords summarise the content of a UniProtKB entry and facilitate the search for proteins of interest.<p><a href='/help/keywords' target='_top'>More...</a></p>Keywordsi
<p>This section provides information about the protein and gene name(s) and synonym(s) and about the organism that is the source of the protein sequence.<p><a href='/help/names_and_taxonomy_section' target='_top'>More...</a></p>Names & Taxonomyi
<p>This subsection of the <a href="http://www.uniprot.org/help/names%5Fand%5Ftaxonomy%5Fsection">Names and taxonomy</a> section provides an exhaustive list of all names of the protein, from commonly used to obsolete, to allow unambiguous identification of a protein.<p><a href='/help/protein_names' target='_top'>More...</a></p>Protein namesi
Recommended name:
Low-density lipoprotein receptor
Short name:
LDL receptor
<p>This subsection of the <a href="http://www.uniprot.org/help/names%5Fand%5Ftaxonomy%5Fsection">Names and taxonomy</a> section indicates the name(s) of the gene(s) that code for the protein sequence(s) described in the entry. Four distinct tokens exist: 'Name', 'Synonyms', 'Ordered locus names' and 'ORF names'.<p><a href='/help/gene_name' target='_top'>More...</a></p>Gene namesi
<p>This subsection of the <a href="http://www.uniprot.org/help/names%5Fand%5Ftaxonomy%5Fsection">Names and taxonomy</a> section provides information on the name(s) of the organism that is the source of the protein sequence.<p><a href='/help/organism-name' target='_top'>More...</a></p>Organismi
<p>This subsection of the <a href="http://www.uniprot.org/help/names%5Fand%5Ftaxonomy%5Fsection">Names and taxonomy</a> section shows the unique identifier assigned by the NCBI to the source organism of the protein. This is known as the 'taxonomic identifier' or 'taxid'.<p><a href='/help/taxonomic_identifier' target='_top'>More...</a></p>Taxonomic identifieri
<p>This subsection of the <a href="http://www.uniprot.org/help/names%5Fand%5Ftaxonomy%5Fsection">Names and taxonomy</a> section contains the taxonomic hierarchical classification lineage of the source organism. It lists the nodes as they appear top-down in the taxonomic tree, with the more general grouping listed first.<p><a href='/help/taxonomic_lineage' target='_top'>More...</a></p>Taxonomic lineagei
<p>This subsection of the <a href="http://www.uniprot.org/help/names%5Fand%5Ftaxonomy%5Fsection">Names and taxonomy</a> section is present for entries that are part of a <a href="http://www.uniprot.org/proteomes">proteome</a>, i.e. of a set of proteins thought to be expressed by organisms whose genomes have been completely sequenced.<p><a href='/help/proteomes_manual' target='_top'>More...</a></p>Proteomesi
UP000005640
<p>A UniProt <a href="http://www.uniprot.org/manual/proteomes%5Fmanual">proteome</a> can consist of several components.<br></br>The component name refers to the genomic component encoding a set of proteins.<p><a href='/help/proteome_component' target='_top'>More...</a></p> Componenti: Chromosome 19
<p>This section provides information on the location and the topology of the mature protein in the cell.<p><a href='/help/subcellular_location_section' target='_top'>More...</a></p>Subcellular locationi
Cited for: SUBCELLULAR LOCATION, GLYCOSYLATION, CHARACTERIZATION OF VARIANT SAINT OMER ASP-546, MUTAGENESIS OF LYS-811; LYS-816; LYS-830 AND CYS-839, UBIQUITINATION, REGION.
<p>Manually curated information which has been propagated from a related experimentally characterized protein.</p>
<p><a href="/manual/evidences#ECO:0000250">More...</a></p>
Manual assertion inferred from sequence similarity toi
<p>Manually curated information that is based on statements in scientific articles for which there is no experimental support.</p>
<p><a href="/manual/evidences#ECO:0000303">More...</a></p>
Manual assertion based on opinion ini
<p>This subsection of the <a href="http://www.uniprot.org/help/subcellular%5Flocation%5Fsection">'Subcellular location'</a> section describes the subcellular compartment where each non-membrane region of a membrane-spanning protein is found.<p><a href='/help/topo_dom' target='_top'>More...</a></p>Topological domaini
<p>This subsection of the <a href="http://www.uniprot.org/help/subcellular%5Flocation%5Fsection">'Subcellular location'</a> section describes the extent of a membrane-spanning region of the protein. It denotes the presence of both alpha-helical transmembrane regions and the membrane spanning regions of beta-barrel transmembrane proteins.<p><a href='/help/transmem' target='_top'>More...</a></p>Transmembranei
Cited for: X-RAY CRYSTALLOGRAPHY (1.37 ANGSTROMS) OF 819-832 IN COMPLEX WITH LDLRAP1, INTERACTION WITH LDLRAP1, CHARACTERIZATION OF VARIANT FHCL1 CYS-828, MUTAGENESIS OF ILE-821 AND GLN-829, TOPOLOGY, MOTIF.
<p>This section provides information on the disease(s) and phenotype(s) associated with a protein.<p><a href='/help/pathology_and_biotech_section' target='_top'>More...</a></p>Pathology & Biotechi
<p>This subsection of the 'Pathology and Biotech' section provides information on the disease(s) associated with genetic variations in a given protein. The information is extracted from the scientific literature and diseases that are also described in the <a href="http://www.ncbi.nlm.nih.gov/sites/entrez?db=omim">OMIM</a> database are represented with a <a href="http://www.uniprot.org/diseases">controlled vocabulary</a> in the following way:<p><a href='/help/involvement_in_disease' target='_top'>More...</a></p>Involvement in diseasei
Cited for: X-RAY CRYSTALLOGRAPHY (1.37 ANGSTROMS) OF 819-832 IN COMPLEX WITH LDLRAP1, INTERACTION WITH LDLRAP1, CHARACTERIZATION OF VARIANT FHCL1 CYS-828, MUTAGENESIS OF ILE-821 AND GLN-829, TOPOLOGY, MOTIF.
"Molecular characterization of minor gene rearrangements in Finnish patients with heterozygous familial hypercholesterolemia: identification of two common missense mutations (Gly823-->Asp and Leu380-->His) and eight rare mutations of the LDL receptor gene." Koivisto U.-M., Viikari J.S., Kontula K. Am. J. Hum. Genet. 57:789-797(1995) [PubMed] [Europe PMC] [Abstract]
Cited for: VARIANTS FHCL1 PORI HIS-401 AND TURKU ASP-844.
Cited for: CHARACTERIZATION OF VARIANTS FHCL1 TYR-155; TRP-416; ASN-454; GLY-577 AND LYS-825.
The disease is caused by mutations affecting the gene represented in this entry.
Disease descriptionA form of hypercholesterolemia, a disorder of lipoprotein metabolism characterized by elevated serum low-density lipoprotein (LDL) cholesterol levels, which result in excess deposition of cholesterol in tissues and leads to xanthelasma, xanthomas, accelerated atherosclerosis and increased risk of premature coronary heart disease. FHCL1 inheritance is autosomal dominant.
<p>This subsection of the 'Sequence' section describes natural variant(s) of the protein sequence.<p><a href='/help/variant' target='_top'>More...</a></p>Natural variantiVAR_005304
C → Rin FHCL1; does not affect receptor expression at the cell surface; results in reduced LDL binding; results in reduced LDL uptake and internalization.2 Publications
D → Nin FHCL1; does not affect receptor expression at the cell surface; results in reduced LDL binding; results in reduced LDL uptake and internalization.2 Publications
D → Nin FHCL1; does not affect receptor expression at the cell surface; results in reduced LDL binding; results in reduced LDL uptake and internalization.2 Publications
R → Gin FHCL1; does not affect receptor expression at the cell surface; results in reduced LDL binding; results in reduced LDL uptake and internalization.2 Publications
D → Gin FHCL1; does not affect receptor expression at the cell surface; results in reduced LDL binding; results in reduced LDL uptake and internalization.3 Publications
N → Kin FHCL1; does not affect receptor expression at the cell surface; does not affect LDL binding; results in impaired LDL uptake and internalization.2 Publications
Cited for: X-RAY CRYSTALLOGRAPHY (1.37 ANGSTROMS) OF 819-832 IN COMPLEX WITH LDLRAP1, INTERACTION WITH LDLRAP1, CHARACTERIZATION OF VARIANT FHCL1 CYS-828, MUTAGENESIS OF ILE-821 AND GLN-829, TOPOLOGY, MOTIF.
<p>This subsection of the <a href="http://www.uniprot.org/manual/pathology%5Fand%5Fbiotech%5Fsection">'Pathology and Biotech'</a> section describes the effect of the experimental mutation of one or more amino acid(s) on the biological properties of the protein.<p><a href='/help/mutagen' target='_top'>More...</a></p>Mutagenesisi
K → R: No change. No change; when associated with R-816 and R-830. Insensitive to MYLIP-triggered degradation; when associated with R-816; R-830 and A-839.1 Publication
Cited for: SUBCELLULAR LOCATION, GLYCOSYLATION, CHARACTERIZATION OF VARIANT SAINT OMER ASP-546, MUTAGENESIS OF LYS-811; LYS-816; LYS-830 AND CYS-839, UBIQUITINATION, REGION.
K → R: No change. No change; when associated with R-830. No change; when associated with R-811 and R-830. Insensitive to MYLIP-triggered degradation; when associated with R-830 and A-839. Insensitive to MYLIP-triggered degradation; when associated with R-811; R-830 and A-839.1 Publication
Cited for: SUBCELLULAR LOCATION, GLYCOSYLATION, CHARACTERIZATION OF VARIANT SAINT OMER ASP-546, MUTAGENESIS OF LYS-811; LYS-816; LYS-830 AND CYS-839, UBIQUITINATION, REGION.
Cited for: X-RAY CRYSTALLOGRAPHY (1.37 ANGSTROMS) OF 819-832 IN COMPLEX WITH LDLRAP1, INTERACTION WITH LDLRAP1, CHARACTERIZATION OF VARIANT FHCL1 CYS-828, MUTAGENESIS OF ILE-821 AND GLN-829, TOPOLOGY, MOTIF.
Cited for: X-RAY CRYSTALLOGRAPHY (1.37 ANGSTROMS) OF 819-832 IN COMPLEX WITH LDLRAP1, INTERACTION WITH LDLRAP1, CHARACTERIZATION OF VARIANT FHCL1 CYS-828, MUTAGENESIS OF ILE-821 AND GLN-829, TOPOLOGY, MOTIF.
Cited for: X-RAY CRYSTALLOGRAPHY (1.37 ANGSTROMS) OF 819-832 IN COMPLEX WITH LDLRAP1, INTERACTION WITH LDLRAP1, CHARACTERIZATION OF VARIANT FHCL1 CYS-828, MUTAGENESIS OF ILE-821 AND GLN-829, TOPOLOGY, MOTIF.
K → R: No change. No change; when associated with R-816. No change; when associated with R-811 and R-816. Insensitive to MYLIP-triggered degradation; when associated with A-839. Insensitive to MYLIP-triggered degradation; when associated with R-816 and A-839. Insensitive to MYLIP-triggered degradation; when associated with R-811; R-816 and A-839.1 Publication
Cited for: SUBCELLULAR LOCATION, GLYCOSYLATION, CHARACTERIZATION OF VARIANT SAINT OMER ASP-546, MUTAGENESIS OF LYS-811; LYS-816; LYS-830 AND CYS-839, UBIQUITINATION, REGION.
C → A: No change. Insensitive to MYLIP-triggered degradation; when associated with R-830. Insensitive to MYLIP-triggered degradation; when associated with R-816 and R-830. Insensitive to MYLIP-triggered degradation; when associated with R-811; R-816 and R-830.1 Publication
Cited for: SUBCELLULAR LOCATION, GLYCOSYLATION, CHARACTERIZATION OF VARIANT SAINT OMER ASP-546, MUTAGENESIS OF LYS-811; LYS-816; LYS-830 AND CYS-839, UBIQUITINATION, REGION.
<p>This subsection of the 'PTM / Processing' section denotes the presence of an N-terminal signal peptide.<p><a href='/help/signal' target='_top'>More...</a></p>Signal peptidei
<p>This subsection of the 'PTM / Processing' section describes the extent of a polypeptide chain in the mature protein following processing or proteolytic cleavage.<p><a href='/help/chain' target='_top'>More...</a></p>ChainiPRO_0000017312
<p>This subsection of the PTM / Processing":/help/ptm_processing_section section describes the positions of cysteine residues participating in disulfide bonds.<p><a href='/help/disulfid' target='_top'>More...</a></p>Disulfide bondi
<p>This subsection of the <a href="http://www.uniprot.org/help/ptm%5Fprocessing%5Fsection">PTM / Processing</a> section specifies the position and type of each covalently attached glycan group (mono-, di-, or polysaccharide).<p><a href='/help/carbohyd' target='_top'>More...</a></p>Glycosylationi
Cited for: SUBCELLULAR LOCATION, GLYCOSYLATION, CHARACTERIZATION OF VARIANT SAINT OMER ASP-546, MUTAGENESIS OF LYS-811; LYS-816; LYS-830 AND CYS-839, UBIQUITINATION, REGION.
Cited for: SUBCELLULAR LOCATION, GLYCOSYLATION, CHARACTERIZATION OF VARIANT SAINT OMER ASP-546, MUTAGENESIS OF LYS-811; LYS-816; LYS-830 AND CYS-839, UBIQUITINATION, REGION.
<p>This subsection of the 'PTM / Processing' section specifies the position and type of each modified residue excluding <a href="http://www.uniprot.org/manual/lipid">lipids</a>, <a href="http://www.uniprot.org/manual/carbohyd">glycans</a> and <a href="http://www.uniprot.org/manual/crosslnk">protein cross-links</a>.<p><a href='/help/mod_res' target='_top'>More...</a></p>Modified residuei
<p>This subsection of the <a href="http://www.uniprot.org/help/ptm%5Fprocessing%5Fsection">PTM/processing</a> section describes post-translational modifications (PTMs). This subsection <strong>complements</strong> the information provided at the sequence level or describes modifications for which <strong>position-specific data is not yet available</strong>.<p><a href='/help/post-translational_modification' target='_top'>More...</a></p>Post-translational modificationi
Cited for: SUBCELLULAR LOCATION, GLYCOSYLATION, CHARACTERIZATION OF VARIANT SAINT OMER ASP-546, MUTAGENESIS OF LYS-811; LYS-816; LYS-830 AND CYS-839, UBIQUITINATION, REGION.
Ubiquitinated by MYLIP leading to degradation.1 Publication
Cited for: SUBCELLULAR LOCATION, GLYCOSYLATION, CHARACTERIZATION OF VARIANT SAINT OMER ASP-546, MUTAGENESIS OF LYS-811; LYS-816; LYS-830 AND CYS-839, UBIQUITINATION, REGION.
<p>This section provides information on the expression of a gene at the mRNA or protein level in cells or in tissues of multicellular organisms.<p><a href='/help/expression_section' target='_top'>More...</a></p>Expressioni
<p>This section provides information on the quaternary structure of a protein and on interaction(s) with other proteins or protein complexes.<p><a href='/help/interaction_section' target='_top'>More...</a></p>Interactioni
<p>This subsection of the <a href="http://www.uniprot.org/help/interaction%5Fsection">'Interaction'</a> section provides information about the protein quaternary structure and interaction(s) with other proteins or protein complexes (with the exception of physiological receptor-ligand interactions which are annotated in the <a href="http://www.uniprot.org/help/function%5Fsection">'Function'</a> section).<p><a href='/help/subunit_structure' target='_top'>More...</a></p>Subunit structurei
Interacts (via NPXY motif) with DAB2 (via PID domain); the interaction is impaired by tyrosine phosphorylation of the NPXY motif (By similarity).
Cited for: X-RAY CRYSTALLOGRAPHY (1.37 ANGSTROMS) OF 819-832 IN COMPLEX WITH LDLRAP1, INTERACTION WITH LDLRAP1, CHARACTERIZATION OF VARIANT FHCL1 CYS-828, MUTAGENESIS OF ILE-821 AND GLN-829, TOPOLOGY, MOTIF.
(Microbial infection) Interacts with C.difficile toxin TcdA, suggesting that it may contribute to TcdA toxin entry into cells.
Cited for: FUNCTION (MICROBIAL INFECTION), INTERACTION WITH HIV-1 TAT.
<p>This subsection of the '<a href="http://www.uniprot.org/help/interaction%5Fsection">Interaction</a>' section provides information about binary protein-protein interactions. The data presented in this section are a quality-filtered subset of binary interactions automatically derived from the <a href="https://www.ebi.ac.uk/intact/">IntAct database</a>. It is updated at every <a href="http://www.uniprot.org/help/synchronization">UniProt release</a>.<p><a href='/help/binary_interactions' target='_top'>More...</a></p>Binary interactionsi
<p>This section provides information on the tertiary and secondary structure of a protein.<p><a href='/help/structure_section' target='_top'>More...</a></p>Structurei
Secondary structure
Legend: HelixTurnBeta strandPDB Structure known for this area
<p>This subsection of the <a href="http://www.uniprot.org/help/structure%5Fsection">'Structure'</a> section is used to indicate the positions of experimentally determined beta strands within the protein sequence.<p><a href='/help/strand' target='_top'>More...</a></p>Beta strandi
<p>Manually validated information inferred from a combination of experimental and computational evidence.</p>
<p><a href="/manual/evidences#ECO:0000244">More...</a></p>
Manual assertion inferred from combination of experimental and computational evidencei
<p>This subsection of the <a href="http://www.uniprot.org/help/structure%5Fsection">'Structure'</a> section is used to indicate the positions of experimentally determined hydrogen-bonded turns within the protein sequence. These elements correspond to the DSSP secondary structure code 'T'.<p><a href='/help/turn' target='_top'>More...</a></p>Turni