LRP1
Prolow-density lipoprotein receptor-related protein 1
Also known as: A2MR, APOER, APR, CD91, IGFBP-3R, IGFBP3R1, LRP, LRP1_HUMAN, LRP1A
Cross-references: UniProt · Ensembl · Human Protein Atlas · GeneCards · NCBI Gene
Protein identityUniProt · HPA
- UniProt accession
- Q07954
- Gene
- LRP1
- Ensembl
- ENSG00000123384
- Chromosome
- 12
- Canonical length
- 4544 aa
- Protein class
- Candidate cardiovascular disease genes, CD markers, Disease related genes, Human disease related genes, Plasma proteins, Potential drug targets, Predicted intracellular proteins, Predicted membrane proteins, Transporters
- Subcellular location
- Nucleoli,Plasma membrane,Cytosol
- Secretome location
- Intracellular and membrane
OverviewNCBI Gene
This gene encodes a member of the low-density lipoprotein receptor family of proteins. The encoded preproprotein is proteolytically processed by furin to generate 515 kDa and 85 kDa subunits that form the mature receptor (PMID: 8546712). This receptor is involved in several cellular processes, including intracellular signaling, lipid homeostasis, and clearance of apoptotic cells. In addition, the encoded protein is necessary for the alpha 2-macroglobulin-mediated clearance of secreted amyloid precursor protein and beta-amyloid, the main component of amyloid plaques found in Alzheimer patients. Expression of this gene decreases with age and has been found to be lower than controls in brain tissue from Alzheimer's disease patients. [provided by RefSeq, Oct 2015]
Canonical amino-acid sequenceUniProt
4544 residues, UniProt reviewed canonical sequence.
>Q07954|LRP1
1 MLTPPLLLLL PLLSALVAAA IDAPKTCSPK QFACRDQITC ISKGWRCDGE RDCPDGSDEA
61 PEICPQSKAQ RCQPNEHNCL GTELCVPMSR LCNGVQDCMD GSDEGPHCRE LQGNCSRLGC
121 QHHCVPTLDG PTCYCNSSFQ LQADGKTCKD FDECSVYGTC SQLCTNTDGS FICGCVEGYL
181 LQPDNRSCKA KNEPVDRPPV LLIANSQNIL ATYLSGAQVS TITPTSTRQT TAMDFSYANE
241 TVCWVHVGDS AAQTQLKCAR MPGLKGFVDE HTINISLSLH HVEQMAIDWL TGNFYFVDDI
301 DDRIFVCNRN GDTCVTLLDL ELYNPKGIAL DPAMGKVFFT DYGQIPKVER CDMDGQNRTK
361 LVDSKIVFPH GITLDLVSRL VYWADAYLDY IEVVDYEGKG RQTIIQGILI EHLYGLTVFE
421 NYLYATNSDN ANAQQKTSVI RVNRFNSTEY QVVTRVDKGG ALHIYHQRRQ PRVRSHACEN
481 DQYGKPGGCS DICLLANSHK ARTCRCRSGF SLGSDGKSCK KPEHELFLVY GKGRPGIIRG
541 MDMGAKVPDE HMIPIENLMN PRALDFHAET GFIYFADTTS YLIGRQKIDG TERETILKDG
601 IHNVEGVAVD WMGDNLYWTD DGPKKTISVA RLEKAAQTRK TLIEGKMTHP RAIVVDPLNG
661 WMYWTDWEED PKDSRRGRLE RAWMDGSHRD IFVTSKTVLW PNGLSLDIPA GRLYWVDAFY
721 DRIETILLNG TDRKIVYEGP ELNHAFGLCH HGNYLFWTEY RSGSVYRLER GVGGAPPTVT
781 LLRSERPPIF EIRMYDAQQQ QVGTNKCRVN NGGCSSLCLA TPGSRQCACA EDQVLDADGV
841 TCLANPSYVP PPQCQPGEFA CANSRCIQER WKCDGDNDCL DNSDEAPALC HQHTCPSDRF
901 KCENNRCIPN RWLCDGDNDC GNSEDESNAT CSARTCPPNQ FSCASGRCIP ISWTCDLDDD
961 CGDRSDESAS CAYPTCFPLT QFTCNNGRCI NINWRCDNDN DCGDNSDEAG CSHSCSSTQF
1021 KCNSGRCIPE HWTCDGDNDC GDYSDETHAN CTNQATRPPG GCHTDEFQCR LDGLCIPLRW
1081 RCDGDTDCMD SSDEKSCEGV THVCDPSVKF GCKDSARCIS KAWVCDGDND CEDNSDEENC
1141 ESLACRPPSH PCANNTSVCL PPDKLCDGND DCGDGSDEGE LCDQCSLNNG GCSHNCSVAP
1201 GEGIVCSCPL GMELGPDNHT CQIQSYCAKH LKCSQKCDQN KFSVKCSCYE GWVLEPDGES
1261 CRSLDPFKPF IIFSNRHEIR RIDLHKGDYS VLVPGLRNTI ALDFHLSQSA LYWTDVVEDK
1321 IYRGKLLDNG ALTSFEVVIQ YGLATPEGLA VDWIAGNIYW VESNLDQIEV AKLDGTLRTT
1381 LLAGDIEHPR AIALDPRDGI LFWTDWDASL PRIEAASMSG AGRRTVHRET GSGGWPNGLT
1441 VDYLEKRILW IDARSDAIYS ARYDGSGHME VLRGHEFLSH PFAVTLYGGE VYWTDWRTNT
1501 LAKANKWTGH NVTVVQRTNT QPFDLQVYHP SRQPMAPNPC EANGGQGPCS HLCLINYNRT
1561 VSCACPHLMK LHKDNTTCYE FKKFLLYARQ MEIRGVDLDA PYYNYIISFT VPDIDNVTVL
1621 DYDAREQRVY WSDVRTQAIK RAFINGTGVE TVVSADLPNA HGLAVDWVSR NLFWTSYDTN
1681 KKQINVARLD GSFKNAVVQG LEQPHGLVVH PLRGKLYWTD GDNISMANMD GSNRTLLFSG
1741 QKGPVGLAID FPESKLYWIS SGNHTINRCN LDGSGLEVID AMRSQLGKAT ALAIMGDKLW
1801 WADQVSEKMG TCSKADGSGS VVLRNSTTLV MHMKVYDESI QLDHKGTNPC SVNNGDCSQL
1861 CLPTSETTRS CMCTAGYSLR SGQQACEGVG SFLLYSVHEG IRGIPLDPND KSDALVPVSG
1921 TSLAVGIDFH AENDTIYWVD MGLSTISRAK RDQTWREDVV TNGIGRVEGI AVDWIAGNIY
1981 WTDQGFDVIE VARLNGSFRY VVISQGLDKP RAITVHPEKG YLFWTEWGQY PRIERSRLDG
2041 TERVVLVNVS ISWPNGISVD YQDGKLYWCD ARTDKIERID LETGENREVV LSSNNMDMFS
2101 VSVFEDFIYW SDRTHANGSI KRGSKDNATD SVPLRTGIGV QLKDIKVFNR DRQKGTNVCA
2161 VANGGCQQLC LYRGRGQRAC ACAHGMLAED GASCREYAGY LLYSERTILK SIHLSDERNL
2221 NAPVQPFEDP EHMKNVIALA FDYRAGTSPG TPNRIFFSDI HFGNIQQIND DGSRRITIVE
2281 NVGSVEGLAY HRGWDTLYWT SYTTSTITRH TVDQTRPGAF ERETVITMSG DDHPRAFVLD
2341 ECQNLMFWTN WNEQHPSIMR AALSGANVLT LIEKDIRTPN GLAIDHRAEK LYFSDATLDK
2401 IERCEYDGSH RYVILKSEPV HPFGLAVYGE HIFWTDWVRR AVQRANKHVG SNMKLLRVDI
2461 PQQPMGIIAV ANDTNSCELS PCRINNGGCQ DLCLLTHQGH VNCSCRGGRI LQDDLTCRAV
2521 NSSCRAQDEF ECANGECINF SLTCDGVPHC KDKSDEKPSY CNSRRCKKTF RQCSNGRCVS
2581 NMLWCNGADD CGDGSDEIPC NKTACGVGEF RCRDGTCIGN SSRCNQFVDC EDASDEMNCS
2641 ATDCSSYFRL GVKGVLFQPC ERTSLCYAPS WVCDGANDCG DYSDERDCPG VKRPRCPLNY
2701 FACPSGRCIP MSWTCDKEDD CEHGEDETHC NKFCSEAQFE CQNHRCISKQ WLCDGSDDCG
2761 DGSDEAAHCE GKTCGPSSFS CPGTHVCVPE RWLCDGDKDC ADGADESIAA GCLYNSTCDD
2821 REFMCQNRQC IPKHFVCDHD RDCADGSDES PECEYPTCGP SEFRCANGRC LSSRQWECDG
2881 ENDCHDQSDE APKNPHCTSQ EHKCNASSQF LCSSGRCVAE ALLCNGQDDC GDSSDERGCH
2941 INECLSRKLS GCSQDCEDLK IGFKCRCRPG FRLKDDGRTC ADVDECSTTF PCSQRCINTH
3001 GSYKCLCVEG YAPRGGDPHS CKAVTDEEPF LIFANRYYLR KLNLDGSNYT LLKQGLNNAV
3061 ALDFDYREQM IYWTDVTTQG SMIRRMHLNG SNVQVLHRTG LSNPDGLAVD WVGGNLYWCD
3121 KGRDTIEVSK LNGAYRTVLV SSGLREPRAL VVDVQNGYLY WTDWGDHSLI GRIGMDGSSR
3181 SVIVDTKITW PNGLTLDYVT ERIYWADARE DYIEFASLDG SNRHVVLSQD IPHIFALTLF
3241 EDYVYWTDWE TKSINRAHKT TGTNKTLLIS TLHRPMDLHV FHALRQPDVP NHPCKVNNGG
3301 CSNLCLLSPG GGHKCACPTN FYLGSDGRTC VSNCTASQFV CKNDKCIPFW WKCDTEDDCG
3361 DHSDEPPDCP EFKCRPGQFQ CSTGICTNPA FICDGDNDCQ DNSDEANCDI HVCLPSQFKC
3421 TNTNRCIPGI FRCNGQDNCG DGEDERDCPE VTCAPNQFQC SITKRCIPRV WVCDRDNDCV
3481 DGSDEPANCT QMTCGVDEFR CKDSGRCIPA RWKCDGEDDC GDGSDEPKEE CDERTCEPYQ
3541 FRCKNNRCVP GRWQCDYDND CGDNSDEESC TPRPCSESEF SCANGRCIAG RWKCDGDHDC
3601 ADGSDEKDCT PRCDMDQFQC KSGHCIPLRW RCDADADCMD GSDEEACGTG VRTCPLDEFQ
3661 CNNTLCKPLA WKCDGEDDCG DNSDENPEEC ARFVCPPNRP FRCKNDRVCL WIGRQCDGTD
3721 NCGDGTDEED CEPPTAHTTH CKDKKEFLCR NQRCLSSSLR CNMFDDCGDG SDEEDCSIDP
3781 KLTSCATNAS ICGDEARCVR TEKAAYCACR SGFHTVPGQP GCQDINECLR FGTCSQLCNN
3841 TKGGHLCSCA RNFMKTHNTC KAEGSEYQVL YIADDNEIRS LFPGHPHSAY EQAFQGDESV
3901 RIDAMDVHVK AGRVYWTNWH TGTISYRSLP PAAPPTTSNR HRRQIDRGVT HLNISGLKMP
3961 RGIAIDWVAG NVYWTDSGRD VIEVAQMKGE NRKTLISGMI DEPHAIVVDP LRGTMYWSDW
4021 GNHPKIETAA MDGTLRETLV QDNIQWPTGL AVDYHNERLY WADAKLSVIG SIRLNGTDPI
4081 VAADSKRGLS HPFSIDVFED YIYGVTYINN RVFKIHKFGH SPLVNLTGGL SHASDVVLYH
4141 QHKQPEVTNP CDRKKCEWLC LLSPSGPVCT CPNGKRLDNG TCVPVPSPTP PPDAPRPGTC
4201 NLQCFNGGSC FLNARRQPKC RCQPRYTGDK CELDQCWEHC RNGGTCAASP SGMPTCRCPT
4261 GFTGPKCTQQ VCAGYCANNS TCTVNQGNQP QCRCLPGFLG DRCQYRQCSG YCENFGTCQM
4321 AADGSRQCRC TAYFEGSRCE VNKCSRCLEG ACVVNKQSGD VTCNCTDGRV APSCLTCVGH
4381 CSNGGSCTMN SKMMPECQCP PHMTGPRCEE HVFSQQQPGH IASILIPLLL LLLLVLVAGV
4441 VFWYKRRVQG AKGFQHQRMT NGAMNVEIGN PTYKMYEGGE PDDVGGLLDA DFALDPDKPT
4501 NFTNPVYATL YMGGHGSRHS LASTDEKREL LGRGPEDEIG DPLALocalizationUniProt · AlphaFold · HPA
Whether an antibody against LRP1 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
- Highest tissue expression
- 102 nTPM
Expression across tissuesHPA
Tissue
- adipose tissue: 102 nTPM
- blood vessel: 72 nTPM
- ovary: 53 nTPM
- breast: 39 nTPM
- placenta: 38 nTPM
- endometrium: 36 nTPM
Single-cell type
- adipocytes: 513 nCPM
- fibroblasts: 444 nCPM
- leydig cells: 345 nCPM
- oligodendrocyte progenitor cells: 335 nCPM
- fibro-adipogenic progenitors: 290 nCPM
- peritubular myoid cells: 279 nCPM
Immune cell
- classical monocyte: 4.3 nTPM
- non-classical monocyte: 2.5 nTPM
- intermediate monocyte: 2.2 nTPM
- myeloid DC: 1.6 nTPM
- total PBMC: 1.6 nTPM
- naive CD8 T-cell: 0.1 nTPM
Brain region
- thalamus: 250 nTPM
- medulla oblongata: 238 nTPM
- basal ganglia: 212 nTPM
- midbrain: 207 nTPM
- cerebellum: 199 nTPM
- spinal cord: 198 nTPM
DiseaseUniProt · ClinVar · IEDB · PubMed
Four sources answering four different questions about LRP1.
Disease | AllUniProt
Conditions LRP1 is implicated in, by any mechanism.
- Keratosis pilaris atrophicans (KPA) MIM:604093
- Developmental dysplasia of the hip 3 (DDH3) MIM:620690
Disease | GeneticClinVar
6 pathogenic / likely-pathogenic of 772 ClinVar records.
Conditions with pathogenic or likely-pathogenic variants.
- Developmental dysplasia of the hip 3
- Atrophoderma vermiculatum
- Keratosis pilaris
- Global developmental delay
ReferencesPubMed · IEDB
Publications for LRP1 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
6 publications
- Lrp1 is a host entry factor for Rift Valley fever virus.
2021 · Cell · RCR 7.6 · 112 citations - The low-density lipoprotein receptor-related protein 1 is a mitogenic receptor for lactoferrin in osteoblastic cells.
2004 · Mol Endocrinol · RCR 3.5 · 140 citations - Alpha2-macroglobulin inhibits the malignant properties of astrocytoma cells by impeding beta-catenin signaling.
2010 · Cancer Res · RCR 1.4 · 57 citations - Platelet factor 4 regulates megakaryopoiesis through low-density lipoprotein receptor-related protein 1 (LRP1) on megakaryocytes.
2009 · Blood · RCR 1 · 49 citations - Phylogenetic conservation of glycoprotein 96 ability to interact with CD91 and facilitate antigen cross-presentation.
2008 · J Immunol · RCR 0.7 · 33 citations
Show 1 more
- A unique function for LRP-1: a component of a two-receptor system mediating specific endocytosis of plasma-derived factor V by megakaryocytes.
2008 · J Thromb Haemost · RCR 0.6 · 27 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)
- 0.06
- gnomAD pLI
- 1
- gnomAD missense Z
- 8.25
- DepMap mean gene effect
- -0.18
- DepMap dependency class
- selective
Cancer expressionTCGA
Across TCGA tumor cohorts, this protein is over-expressed in roughly 5% of surveyed tumor types (aggregate summary; per-cohort expression, alteration, and survival load in the interactive view).
OntologyGO
Biological processes
- amyloid-beta clearance
- amyloid-beta clearance by cellular catabolic process
- amyloid-beta clearance by transcytosis
- aorta morphogenesis
- apoptotic cell clearance
- astrocyte activation involved in immune response
- cellular response to amyloid-beta
- enzyme-linked receptor protein signaling pathway
- lipid metabolic process
- lipoprotein transport
- lysosomal transport
- negative regulation of gene expression
- negative regulation of platelet-derived growth factor receptor-beta signaling pathway
- negative regulation of SMAD protein signal transduction
- negative regulation of smooth muscle cell migration
- negative regulation of Wnt signaling pathway
- phagocytosis
- positive regulation of amyloid-beta clearance
- positive regulation of cholesterol efflux
- positive regulation of endocytosis
- positive regulation of lipid transport
- positive regulation of lysosomal protein catabolic process
- positive regulation of protein localization to plasma membrane
- positive regulation of reverse cholesterol transport
- receptor internalization
- receptor-mediated endocytosis
- regulation of actin cytoskeleton organization
- regulation of extracellular matrix disassembly
- regulation of extracellular matrix organization
- retinoid metabolic process
- transcytosis
- transport across blood-brain barrier
- positive regulation of transcytosis
Molecular functions
- amyloid-beta binding
- apolipoprotein binding
- calcium ion binding
- cargo receptor activity
- clathrin heavy chain binding
- heparan sulfate proteoglycan binding
- lipoprotein particle receptor binding
- low-density lipoprotein particle receptor activity
- protein-containing complex binding
- RNA binding
- scavenger receptor activity
- signaling receptor activity
- alpha-2 macroglobulin receptor activity
- apolipoprotein 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
- Growth factor receptor cysteine-rich domain superfamily
- Six-bladed beta-propeller, TolB-like
- EGF-like calcium-binding, conserved site
- Low-density lipoprotein (LDL) receptor class A, conserved site
- Complement Clr-like EGF domain
- 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
- Complement Clr-like EGF-like
- Coagulation Factor Xa inhibitory site
KeywordsUniProt
InteractionsUniProt · HPA
Protein binding partners of LRP1 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 LRP1 as an antibody target. Whether an autoantibody or antibody against LRP1 could matter depends on whether native LRP1 is physically reachable, whether the body needs it intact, and whether it acts in a disease-relevant tissue.
LRP1 is annotated at the cell surface, where native LRP1 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 LRP1 as an autoantigen. Seroatlas presents hypothesis context only and does not manufacture a known-serology claim.
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