VLDLR
Very low-density lipoprotein receptor
Also known as: CARMQ1, CHRMQ1, VLDLR_HUMAN, VLDLRCH
Cross-references: UniProt · Ensembl · Human Protein Atlas · GeneCards · NCBI Gene
Protein identityUniProt · HPA
- UniProt accession
- P98155
- Gene
- VLDLR
- Ensembl
- ENSG00000147852
- Chromosome
- 9
- Canonical length
- 873 aa
- Protein class
- Disease related genes, Human disease related genes, Predicted intracellular proteins, Predicted membrane proteins
- Subcellular location
- Vesicles,Cytokinetic bridge,Centriolar satellite
- Quaternary structure
- Homooligomer
OverviewNCBI Gene
The low density lipoprotein receptor (LDLR) gene family consists of cell surface proteins involved in receptor-mediated endocytosis of specific ligands. This gene encodes a lipoprotein receptor that is a member of the LDLR family and plays important roles in VLDL-triglyceride metabolism and the reelin signaling pathway. Mutations in this gene cause VLDLR-associated cerebellar hypoplasia. Alternative splicing generates multiple transcript variants encoding distinct isoforms for this gene. [provided by RefSeq, Aug 2009]
Canonical amino-acid sequenceUniProt
873 residues, UniProt reviewed canonical sequence.
>P98155|VLDLR
1 MGTSALWALW LLLALCWAPR ESGATGTGRK AKCEPSQFQC TNGRCITLLW KCDGDEDCVD
61 GSDEKNCVKK TCAESDFVCN NGQCVPSRWK CDGDPDCEDG SDESPEQCHM RTCRIHEISC
121 GAHSTQCIPV SWRCDGENDC DSGEDEENCG NITCSPDEFT CSSGRCISRN FVCNGQDDCS
181 DGSDELDCAP PTCGAHEFQC STSSCIPISW VCDDDADCSD QSDESLEQCG RQPVIHTKCP
241 ASEIQCGSGE CIHKKWRCDG DPDCKDGSDE VNCPSRTCRP DQFECEDGSC IHGSRQCNGI
301 RDCVDGSDEV NCKNVNQCLG PGKFKCRSGE CIDISKVCNQ EQDCRDWSDE PLKECHINEC
361 LVNNGGCSHI CKDLVIGYEC DCAAGFELID RKTCGDIDEC QNPGICSQIC INLKGGYKCE
421 CSRGYQMDLA TGVCKAVGKE PSLIFTNRRD IRKIGLERKE YIQLVEQLRN TVALDADIAA
481 QKLFWADLSQ KAIFSASIDD KVGRHVKMID NVYNPAAIAV DWVYKTIYWT DAASKTISVA
541 TLDGTKRKFL FNSDLREPAS IAVDPLSGFV YWSDWGEPAK IEKAGMNGFD RRPLVTADIQ
601 WPNGITLDLI KSRLYWLDSK LHMLSSVDLN GQDRRIVLKS LEFLAHPLAL TIFEDRVYWI
661 DGENEAVYGA NKFTGSELAT LVNNLNDAQD IIVYHELVQP SGKNWCEEDM ENGGCEYLCL
721 PAPQINDHSP KYTCSCPSGY NVEENGRDCQ STATTVTYSE TKDTNTTEIS ATSGLVPGGI
781 NVTTAVSEVS VPPKGTSAAW AILPLLLLVM AAVGGYLMWR NWQHKNMKSM NFDNPVYLKT
841 TEEDLSIDIG RHSASVGHTY PAISVVSTDD DLALocalizationUniProt · AlphaFold · HPA
Whether an antibody against VLDLR can act on the native protein depends on physical access: surface and secreted proteins are reachable by circulating antibodies, intracellular proteins usually are not.
- Antibody reachability
- Cell surface
- Secreted
- No
- Transmembrane segments
- 1
- Mean surface accessibility (rSASA)
- 0.38
- Highest tissue expression
- 32 nTPM
Expression across tissuesHPA
Tissue
- ovary: 32 nTPM
- heart muscle: 23 nTPM
- parathyroid gland: 18 nTPM
- skeletal muscle: 12 nTPM
- retina: 11 nTPM
- tongue: 11 nTPM
Single-cell type
- cardiomyocytes: 220 nCPM
- epicardial cells: 98 nCPM
- pancreatic islet cells: 96 nCPM
- esophageal apical cells: 71 nCPM
- cone photoreceptor cells: 62 nCPM
- gonadotrophs: 62 nCPM
Immune cell
- eosinophil: 6.3 nTPM
- neutrophil: 0.9 nTPM
- MAIT T-cell: 0.6 nTPM
- plasmacytoid DC: 0.5 nTPM
- gdT-cell: 0.2 nTPM
- memory CD8 T-cell: 0.2 nTPM
Brain region
- white matter: 29 nTPM
- medulla oblongata: 26 nTPM
- choroid plexus: 23 nTPM
- basal ganglia: 23 nTPM
- pons: 22 nTPM
- midbrain: 22 nTPM
DiseaseUniProt · ClinVar · IEDB · PubMed
Four sources answering four different questions about VLDLR.
Disease | AllUniProt
Conditions VLDLR is implicated in, by any mechanism.
- Cerebellar ataxia, impaired intellectual development, and dysequilibrium syndrome 1 (CAMRQ1) MIM:224050
Disease | GeneticClinVar
63 pathogenic / likely-pathogenic of 861 ClinVar records.
Conditions with pathogenic or likely-pathogenic variants.
- Cerebellar ataxia, intellectual disability, and dysequilibrium syndrome 1
- Cerebellar hypoplasia
- Abnormality of the nervous system
- Dysequilibrium syndrome
- Inborn genetic diseases
ReferencesPubMed · IEDB
Publications for VLDLR from three distinct lines of evidence, kept separate because they answer different questions: whether antibodies are directed at the protein, whether a B-cell epitope has been mapped on it, and whether a T-cell epitope has. Each is labelled with its source.
Reference: AutoantibodyPubMed
2 publications
- The very low density lipoprotein receptor mediates the cellular catabolism of lipoprotein lipase and urokinase-plasminogen activator inhibitor type I complexes.
1995 · J Biol Chem · RCR 3.6 · 149 citations - Transcytosis of lipoprotein lipase across cultured endothelial cells requires both heparan sulfate proteoglycans and the very low density lipoprotein receptor.
2001 · J Biol Chem · RCR 1.6 · 75 citations
Sources: PubMed — antigen-level antibody evidence from a custom retrieval. Records matching a controlled set of autoantibody terms (the MeSH descriptors Autoantibodies and Autoantigens, with title and abstract term variants) were obtained through NCBI E-utilities, and their titles and abstracts parsed for constructions that direct an antibody at a named protein rather than for co-occurrence. Captured names were resolved against UniProt nomenclature and each antigen adjudicated individually against the source text. Bibliographic records from PubMed and MeSH, U.S. National Library of Medicine; citation metrics from NIH iCite (Hutchins et al., PLoS Biology 2016). Titles link to PubMed; abstracts are not reproduced here. The NLM does not endorse this analysis.
Genetic constraint and essentialitygnomAD · DepMap
Does the body need this protein intact? Low LOEUF or a strong DepMap dependency means loss or blockade of the protein is likely to be felt.
- gnomAD LOEUF (loss-of-function intolerance)
- 0.72
- gnomAD pLI
- 0
- gnomAD missense Z
- -1.12
- DepMap mean gene effect
- 0.1
- DepMap dependency class
- none
Cancer expressionTCGA
Across TCGA tumor cohorts, this protein is over-expressed in roughly 4% of surveyed tumor types (aggregate summary; per-cohort expression, alteration, and survival load in the interactive view).
OntologyGO
Biological processes
- cholesterol metabolic process
- dendrite morphogenesis
- glycoprotein transport
- lipid transport
- memory
- nervous system development
- positive regulation of dendrite development
- receptor-mediated endocytosis
- reelin-mediated signaling pathway
- regulation of synapse assembly
- signal transduction
- ventral spinal cord development
- very-low-density lipoprotein particle clearance
Molecular functions
- apolipoprotein binding
- calcium ion binding
- calcium-dependent protein binding
- cargo receptor activity
- low-density lipoprotein particle receptor activity
- reelin receptor activity
- very-low-density lipoprotein particle binding
- very-low-density lipoprotein particle receptor activity
Cellular components
Protein domainsUniProt · Pfam · InterPro
- LDLR class B repeat
- EGF-type aspartate/asparagine hydroxylation site
- EGF-like domain
- EGF-like calcium-binding domain
- Low-density lipoprotein (LDL) receptor class A repeat
- Six-bladed beta-propeller, TolB-like
- EGF-like calcium-binding, conserved site
- Low-density lipoprotein (LDL) receptor class A, conserved site
- LDL receptor-like superfamily
- NOTCH1, EGF-like calcium-binding domain
- Low-density lipoprotein receptor-related
- Low-density lipoprotein receptor domain class A
- Low-density lipoprotein receptor repeat class B
- Calcium-binding EGF domain
- Coagulation Factor Xa inhibitory site
KeywordsUniProt
- Cell membrane
- Cholesterol metabolism
- Coated pit
- Disulfide bond
- EGF-like domain
- Endocytosis
- Glycoprotein
- Host-virus interaction
- Intellectual disability
- Isopeptide bond
- Lipid metabolism
- Lipid transport
- Membrane
- Receptor
- Repeat
- Signal
- Steroid metabolism
- Sterol metabolism
- Transmembrane
- Transmembrane helix
- Transport
- Ubl conjugation
- VLDL
InteractionsUniProt · HPA
Protein binding partners of VLDLR in the human serome: UniProt-annotated complex subunits plus reported interactors. Each links to its own Seroatlas record.
Antibody and autoantibody relevanceSeroatlas analysis
Seroatlas reads VLDLR as an antibody target. Whether an autoantibody or antibody against VLDLR could matter depends on whether native VLDLR is physically reachable, whether the body needs it intact, and whether it acts in a disease-relevant tissue.
VLDLR is annotated at the cell surface, where native VLDLR is exposed to circulating antibodies and is a prime autoantibody target that could block, deplete, or overstimulate it.
Annotation status
The present source text does not explicitly label VLDLR as an autoantigen. Seroatlas presents hypothesis context only and does not manufacture a known-serology claim.
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