O88572 (LRP6_MOUSE) Reviewed, UniProtKB/Swiss-Prot
Last modified
May 1, 2013.
Version 108.
History...
Names·Attributes·General annotation·Ontologies·Sequence annotation·Sequences·References·Cross-refs·Entry info·DocumentsCustomize order
Names·Attributes·General annotation·Ontologies·Sequence annotation·Sequences·References·Cross-refs·Entry info·DocumentsCustomize orderNames and origin
| Protein names | Recommended name: Low-density lipoprotein receptor-related protein 6 Short name=LRP-6 | ||
| Gene names |
| ||
| Organism | Mus musculus (Mouse) [Reference proteome] | ||
| Taxonomic identifier | 10090 [NCBI] | ||
| Taxonomic lineage | Eukaryota › Metazoa › Chordata › Craniata › Vertebrata › Euteleostomi › Mammalia › Eutheria › Euarchontoglires › Glires › Rodentia › Sciurognathi › Muroidea › Muridae › Murinae › Mus › Mus![]() |
Protein attributes
| Sequence length | 1613 AA. |
| Sequence status | Complete. |
| Sequence processing | The displayed sequence is further processed into a mature form. |
| Protein existence | Evidence at protein level |
General annotation (Comments)
| Function | Component of the Wnt-Fzd-LRP5-LRP6 complex that triggers beta-catenin signaling through inducing aggregation of receptor-ligand complexes into ribosome-sized signalsomes. Cell-surface coreceptor of Wnt/beta-catenin signaling, which plays a pivotal role in bone formation. The Wnt-induced Fzd/LRP6 coreceptor complex recruits DVL1 polymers to the plasma membrane which, in turn, recruits the AXIN1/GSK3B-complex to the cell surface promoting the formation of signalsomes and inhibiting AXIN1/GSK3-mediated phosphorylation and destruction of beta-catenin. Required for posterior patterning of the epiblast during gastrulation By similarity. Ref.4 |
| Subunit structure | Homodimer; disulfide-linked By similarity. Forms phosphorylated oligomer aggregates on Wnt-signaling By similarity. Component of the Wnt-Fzd-LRP5-LRP6 complex. Interacts (via the extracellular domain) with WNT1; the interaction is enhanced by prior formation of the Wnt/Fzd complex. Interacts (via the beta-propeller regions 3 and 4) with WNT3A. Interacts (via the beta-propeller regions 1 and 2) with WNT9B. Interacts with FZD5; the interaction forms a coreceptor complex for Wnt signaling and is inhibited by DKK1 and DRAXIN. Interacts (via beta propeller region) with DKK1; the interaction inhibits FZD5/LRP6 complex formation. Interacts with DKK2. Interacts (via the phosphorylated PPPSP motifs) with AXIN1; the interaction recruits the AXIN1/GSK3B complex to cell surface LRP6 signalsomes. Interacts (via the extracellular domain) with RSPO1; the interaction activates Wnt/beta-catenin signaling. Interacts (via the extracellular domain) with RSPO3 (via the cysteine rich domain); the interaction activates Wnt/beta-catenin signaling. Interacts (via the beta-propeller regions 1 and 2) with SOST; the interaction competes with DKK1 for binding for inhibiting beta-catenin signaling. Interacts (via the cytoplasmic domain) with CSNKIE; the interaction phosphorylates LRP6, binds AXIN1 and inhibits AXIN1/GSK3B-mediated phosphorylation of beta-catenin By similarity. Interacts with DRAXIN; the interaction inhibits Wnt signaling. Interacts with GRB10; the interaction prevents AXIN1 binding, thus negatively regulating the Wnt signaling pathway. Interacts with MESD; the interaction prevents the formation of LRP6 aggregates and targets LRP6 to the plasma membrane. Interacts with MACF1. Interacts with DAB2; the interaction involves LRP6 phosphorylation by CK2 and sequesters LRP6 towards clathrin-mediated endocytosis. Interacts with TMEM198 By similarity. Ref.3 Ref.5 Ref.6 Ref.8 Ref.10 |
| Subcellular location | Membrane; Single-pass type I membrane protein. Endoplasmic reticulum. Note: On Wnt signaling, undergoes a cycle of caveolin- or clathrin-mediated endocytosis and plasma membrane location. Released from the endoplasmic reticulum on palmitoylation. Mono-ubiquitination retains it in the endoplasmic reticulum in the absence of palmitoylation. On Wnt signaling, phosphorylated, aggregates and colocalizes with AXIN1 and GSK3B at the plasma membrane in LRP6-signalsomes By similarity. Chaperoned to the plasma membrane by MESD. Ref.3 Ref.7 Ref.10 |
| Tissue specificity | Expressed in early embryo. Broadly expressed throughout the embryonic ectoderm and in nascent mesoderm, and in endoderm emerging from the primitive streak. Ref.4 |
| Domain | The YWTD-EGF-like domains 1 and 2 are required for the interaction with Wnt-frizzled complex. The YWTD-EGF-like domains 3 and 4 are required for the interaction with DKK1 By similarity. The PPPSP motifs play a central role in signal transduction by being phosphorylated, leading to activate the Wnt signaling pathway. |
| Post-translational modification | Dual phosphorylation of cytoplasmic PPPSP motifs sequentially by GSK3 and CK1 is required for AXIN1-binding, and subsequent stabilization and activation of beta-catenin via preventing GSK3-mediated phosphorylation of beta-catenin. Phosphorylated, in vitro, by GRK5/6 within and outside the PPPSP motifs. Phosphorylation at Ser-1490 by CDK14 during G2/M phase leads to regulation of the Wnt signaling pathway during the cell cycle. Phosphorylation by GSK3B is induced by RPSO1 binding and inhibited by DKK1. Phosphorylated, in vitro, by casein kinase I on Thr-1479 By similarity. Ref.7 Undergoes gamma-secretase-dependent regulated intramembrane proteolysis (RIP). The extracellular domain is first released by shedding, and then, through the action of gamma-secretase, the intracellular domain (ICD) is released into the cytoplasm where it is free to bind to GSK3B and to activate canonical Wnt signaling By similarity. Palmitoylation on the two sites near the transmembrane domain leads to release of LRP6 from the endoplasmic reticulum By similarity. Mono-ubiquitinated which retains LRP6 in the endoplasmic reticulum. Ubiquitinated by ZNRF3, leading to its degradation by the proteasome By similarity. N-glycosylation is required for cell surface location By similarity. |
| Involvement in disease | Defects in Lrp6 are the cause of Ringelschwanz (rs) phenotype. Rs phenotype is a spontaneous mutation that is characterized by a combination of multiple Wnt-deficient phenotypes including dysmorphologies of the axial skeleton, digits and the neural tube. The establishment of the anteroposterior somite compartments, the epithelialization of nascent somites, and the formation of segment borders are disturbed in (rs) mutants. There is delayed ossification at birth and a low bone mass phenotype in adults. Functional analyzes reveal impaired targeting to the plasma surface due to reduced interaction with MESD leading to inhibited Wnt/beta-catenin signaling. |
| Sequence similarities | Belongs to the LDLR family. Contains 4 EGF-like domains. Contains 3 LDL-receptor class A domains. Contains 20 LDL-receptor class B repeats. |
Ontologies
Sequence annotation (Features)
| Feature key | Position(s) | Length | Description | Graphical view | Feature identifier | ||||||
Molecule processing | |||||||||||
|---|---|---|---|---|---|---|---|---|---|---|---|
| Signal peptide | 1 – 19 | 19 | Potential | ||||||||
| Chain | 20 – 1613 | 1594 | Low-density lipoprotein receptor-related protein 6 | PRO_0000017331 | |||||||
Regions | |||||||||||
| Topological domain | 20 – 1370 | 1351 | Extracellular Potential | ||||||||
| Transmembrane | 1371 – 1393 | 23 | Helical; Potential | ||||||||
| Topological domain | 1394 – 1613 | 220 | Cytoplasmic Potential | ||||||||
| Repeat | 63 – 106 | 44 | LDL-receptor class B 1 | ||||||||
| Repeat | 107 – 149 | 43 | LDL-receptor class B 2 | ||||||||
| Repeat | 150 – 193 | 44 | LDL-receptor class B 3 | ||||||||
| Repeat | 194 – 235 | 42 | LDL-receptor class B 4 | ||||||||
| Repeat | 236 – 277 | 42 | LDL-receptor class B 5 | ||||||||
| Domain | 282 – 324 | 43 | EGF-like 1 | ||||||||
| Repeat | 372 – 414 | 43 | LDL-receptor class B 6 | ||||||||
| Repeat | 415 – 457 | 43 | LDL-receptor class B 7 | ||||||||
| Repeat | 458 – 501 | 44 | LDL-receptor class B 8 | ||||||||
| Repeat | 502 – 542 | 41 | LDL-receptor class B 9 | ||||||||
| Repeat | 543 – 587 | 45 | LDL-receptor class B 10 | ||||||||
| Domain | 588 – 628 | 41 | EGF-like 2 | ||||||||
| Repeat | 674 – 716 | 43 | LDL-receptor class B 11 | ||||||||
| Repeat | 717 – 759 | 43 | LDL-receptor class B 12 | ||||||||
| Repeat | 760 – 802 | 43 | LDL-receptor class B 13 | ||||||||
| Repeat | 803 – 842 | 40 | LDL-receptor class B 14 | ||||||||
| Repeat | 843 – 885 | 43 | LDL-receptor class B 15 | ||||||||
| Domain | 889 – 930 | 42 | EGF-like 3 | ||||||||
| Repeat | 977 – 1025 | 49 | LDL-receptor class B 16 | ||||||||
| Repeat | 1026 – 1068 | 43 | LDL-receptor class B 17 | ||||||||
| Repeat | 1069 – 1113 | 45 | LDL-receptor class B 18 | ||||||||
| Repeat | 1114 – 1156 | 43 | LDL-receptor class B 19 | ||||||||
| Repeat | 1157 – 1198 | 42 | LDL-receptor class B 20 | ||||||||
| Domain | 1203 – 1244 | 42 | EGF-like 4 | ||||||||
| Domain | 1248 – 1286 | 39 | LDL-receptor class A 1 | ||||||||
| Domain | 1287 – 1323 | 37 | LDL-receptor class A 2 | ||||||||
| Domain | 1325 – 1361 | 37 | LDL-receptor class A 3 | ||||||||
| Region | 20 – 275 | 256 | Beta-propeller 1 | ||||||||
| Region | 328 – 589 | 262 | Beta-propeller 2 | ||||||||
| Region | 631 – 890 | 260 | Beta-propeller 3 | ||||||||
| Region | 933 – 1202 | 270 | Beta-propeller 4 | ||||||||
| Motif | 1487 – 1493 | 7 | PPPSP motif A | ||||||||
| Motif | 1527 – 1534 | 8 | PPPSP motif B | ||||||||
| Motif | 1568 – 1575 | 8 | PPPSP motif C | ||||||||
| Motif | 1588 – 1593 | 6 | PPPSP motif D | ||||||||
| Motif | 1603 – 1610 | 8 | PPPSP motif E | ||||||||
| Compositional bias | 1469 – 1475 | 7 | Poly-Ser | ||||||||
| Compositional bias | 1566 – 1573 | 8 | Poly-Pro | ||||||||
| Compositional bias | 1603 – 1608 | 6 | Poly-Pro | ||||||||
Amino acid modifications | |||||||||||
| Modified residue | 1420 | 1 | Phosphoserine; by CK1 By similarity | ||||||||
| Modified residue | 1430 | 1 | Phosphoserine; by CK1 By similarity | ||||||||
| Modified residue | 1479 | 1 | Phosphothreonine By similarity | ||||||||
| Modified residue | 1490 | 1 | Phosphoserine; by CDK14, GRK5 and GRK6 By similarity | ||||||||
| Modified residue | 1493 | 1 | Phosphothreonine; by CK1 By similarity | ||||||||
| Lipidation | 1394 | 1 | S-palmitoyl cysteine By similarity | ||||||||
| Lipidation | 1399 | 1 | S-palmitoyl cysteine By similarity | ||||||||
| Glycosylation | 42 | 1 | N-linked (GlcNAc...) Potential | ||||||||
| Glycosylation | 81 | 1 | N-linked (GlcNAc...) Potential | ||||||||
| Glycosylation | 281 | 1 | N-linked (GlcNAc...) Potential | ||||||||
| Glycosylation | 433 | 1 | N-linked (GlcNAc...) Potential | ||||||||
| Glycosylation | 486 | 1 | N-linked (GlcNAc...) Potential | ||||||||
| Glycosylation | 692 | 1 | N-linked (GlcNAc...) Potential | ||||||||
| Glycosylation | 859 | 1 | N-linked (GlcNAc...) Potential | ||||||||
| Glycosylation | 865 | 1 | N-linked (GlcNAc...) Potential | ||||||||
| Glycosylation | 926 | 1 | N-linked (GlcNAc...) Potential | ||||||||
| Disulfide bond | 286 ↔ 297 | By similarity | |||||||||
| Disulfide bond | 293 ↔ 308 | By similarity | |||||||||
| Disulfide bond | 310 ↔ 323 | By similarity | |||||||||
| Disulfide bond | 592 ↔ 603 | By similarity | |||||||||
| Disulfide bond | 599 ↔ 612 | By similarity | |||||||||
| Disulfide bond | 614 ↔ 627 | By similarity | |||||||||
| Disulfide bond | 893 ↔ 904 | By similarity | |||||||||
| Disulfide bond | 900 ↔ 914 | By similarity | |||||||||
| Disulfide bond | 916 ↔ 929 | By similarity | |||||||||
| Disulfide bond | 1207 ↔ 1218 | By similarity | |||||||||
| Disulfide bond | 1214 ↔ 1228 | By similarity | |||||||||
| Disulfide bond | 1230 ↔ 1243 | By similarity | |||||||||
| Disulfide bond | 1249 ↔ 1263 | By similarity | |||||||||
| Disulfide bond | 1256 ↔ 1276 | By similarity | |||||||||
| Disulfide bond | 1270 ↔ 1285 | By similarity | |||||||||
| Disulfide bond | 1288 ↔ 1300 | By similarity | |||||||||
| Disulfide bond | 1295 ↔ 1313 | By similarity | |||||||||
| Disulfide bond | 1307 ↔ 1322 | By similarity | |||||||||
| Disulfide bond | 1326 ↔ 1338 | By similarity | |||||||||
| Disulfide bond | 1333 ↔ 1351 | By similarity | |||||||||
| Disulfide bond | 1345 ↔ 1360 | By similarity | |||||||||
| Cross-link | 1403 | Glycyl lysine isopeptide (Lys-Gly) (interchain with G-Cter in ubiquitin) By similarity | |||||||||
Natural variations | |||||||||||
| Natural variant | 886 | 1 | R → W in rs. Ref.9 Ref.10 | ||||||||
Experimental info | |||||||||||
| Sequence conflict | 83 | 1 | S → T in AAH60704. Ref.2 | ||||||||
| Sequence conflict | 317 | 1 | M → L in AAH60704. Ref.2 | ||||||||
| Sequence conflict | 586 | 1 | V → I in AAH60704. Ref.2 | ||||||||
| Sequence conflict | 622 | 1 | G → S in AAH60704. Ref.2 | ||||||||
| Sequence conflict | 933 | 1 | S → T in AAH60704. Ref.2 | ||||||||
Sequences
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References
| « Hide 'large scale' references | |
| [1] | "Isolation and characterization of LRP6, a novel member of the low density lipoprotein receptor gene family." Brown S.D., Twells R.C., Hey P.J., Cox R.D., Levy E.R., Soderman A.R., Metzker M.L., Caskey C.T., Todd J.A., Hess J.F. Biochem. Biophys. Res. Commun. 248:879-888(1998) [PubMed] [Europe PMC] [Abstract] Cited for: NUCLEOTIDE SEQUENCE [MRNA]. Strain: BALB/c. Tissue: Liver. |
| [2] | "The status, quality, and expansion of the NIH full-length cDNA project: the Mammalian Gene Collection (MGC)." The MGC Project Team Genome Res. 14:2121-2127(2004) [PubMed] [Europe PMC] [Abstract] Cited for: NUCLEOTIDE SEQUENCE [LARGE SCALE MRNA]. Strain: C57BL/6. Tissue: Brain. |
| [3] | "Mesd encodes an LRP5/6 chaperone essential for specification of mouse embryonic polarity." Hsieh J.-C., Lee L., Zhang L., Wefer S., Brown K., DeRossi C., Wines M.E., Rosenquist T., Holdener B.C. Cell 112:355-367(2003) [PubMed] [Europe PMC] [Abstract] Cited for: INTERACTION WITH MESD, SUBUNIT, SUBCELLULAR LOCATION. |
| [4] | "The Wnt co-receptors Lrp5 and Lrp6 are essential for gastrulation in mice." Kelly O.G., Pinson K.I., Skarnes W.C. Development 131:2803-2815(2004) [PubMed] [Europe PMC] [Abstract] Cited for: FUNCTION, TISSUE SPECIFICITY. |
| [5] | "Mouse cristin/R-spondin family proteins are novel ligands for the Frizzled 8 and LRP6 receptors and activate beta-catenin-dependent gene expression." Nam J.-S., Turcotte T.J., Smith P.F., Choi S., Yoon J.K. J. Biol. Chem. 281:13247-13257(2006) [PubMed] [Europe PMC] [Abstract] Cited for: INTERACTION WITH RSPO1 AND RSPO3. |
| [6] | "GRB10 binds to LRP6, the Wnt co-receptor and inhibits canonical Wnt signaling pathway." Tezuka N., Brown A.M., Yanagawa S. Biochem. Biophys. Res. Commun. 356:648-654(2007) [PubMed] [Europe PMC] [Abstract] Cited for: INTERACTION WITH GRB10. |
| [7] | "Analysis of endogenous LRP6 function reveals a novel feedback mechanism by which Wnt negatively regulates its receptor." Khan Z., Vijayakumar S., de la Torre T.V., Rotolo S., Bafico A. Mol. Cell. Biol. 27:7291-7301(2007) [PubMed] [Europe PMC] [Abstract] Cited for: PHOSPHORYLATION AT SER-1490, INDUCTION, SUBCELLULAR LOCATION. |
| [8] | "Neucrin is a novel neural-specific secreted antagonist to canonical Wnt signaling." Miyake A., Takahashi Y., Miwa H., Shimada A., Konishi M., Itoh N. Biochem. Biophys. Res. Commun. 390:1051-1055(2009) [PubMed] [Europe PMC] [Abstract] Cited for: INTERACTION WITH DRAXIN. |
| [9] | "Skeletal defects in ringelschwanz mutant mice reveal that Lrp6 is required for proper somitogenesis and osteogenesis." Kokubu C., Heinzmann U., Kokubu T., Sakai N., Kubota T., Kawai M., Wahl M.B., Galceran J., Grosschedl R., Ozono K., Imai K. Development 131:5469-5480(2004) [PubMed] [Europe PMC] [Abstract] Cited for: VARIANT RS TRP-886. |
| [10] | "Lrp6 hypomorphic mutation affects bone mass through bone resorption in mice and impairs interaction with Mesd." Kubota T., Michigami T., Sakaguchi N., Kokubu C., Suzuki A., Namba N., Sakai N., Nakajima S., Imai K., Ozono K. J. Bone Miner. Res. 23:1661-1671(2008) [PubMed] [Europe PMC] [Abstract] Cited for: CHARACTERIZATION OF VARIANT RINGELSCHWANZ PHENOTYPE TRP-886, SUBCELLULAR LOCATION, INTERACTION WITH DKK1; WNT1 AND MESD. |
| + | Additional computationally mapped references. |
Cross-references
Sequence databases | |
|---|---|
| EMBL GenBank DDBJ | AF074265 mRNA. Translation: AAC33007.1. BC060704 mRNA. Translation: AAH60704.1. |
| IPI | IPI00271594. |
| PIR | JE0273. |
| RefSeq | NP_032540.2. NM_008514.4. |
| UniGene | Mm.321990. |
3D structure databases | |
| ProteinModelPortal | O88572. |
| SMR | O88572. Positions 20-1363. |
| ModBase | Search... |
Protein-protein interaction databases | |
| DIP | DIP-46460N. |
| IntAct | O88572. 1 interaction. |
| STRING | 10090.ENSMUSP00000032322. |
PTM databases | |
| PhosphoSite | O88572. |
Proteomic databases | |
| PaxDb | O88572. |
| PRIDE | O88572. |
Protocols and materials databases | |
| StructuralBiologyKnowledgebase | Search... |
Genome annotation databases | |
| Ensembl | ENSMUST00000032322; ENSMUSP00000032322; ENSMUSG00000030201. |
| GeneID | 16974. |
| KEGG | mmu:16974. |
| UCSC | uc009ekl.2. mouse. |
Organism-specific databases | |
| CTD | 4040. |
| MGI | MGI:1298218. Lrp6. |
Phylogenomic databases | |
| eggNOG | NOG121718. |
| GeneTree | ENSGT00690000101695. |
| HOGENOM | HOG000230697. |
| HOVERGEN | HBG049167. |
| InParanoid | O88572. |
| KO | K03068. |
| OrthoDB | EOG4RNB7H. |
Gene expression databases | |
| ArrayExpress | O88572. |
| Bgee | O88572. |
| Genevestigator | O88572. |
| GermOnline | ENSMUSG00000030201. Mus musculus. |
Family and domain databases | |
| Gene3D | 2.120.10.30. 4 hits. 4.10.400.10. 3 hits. |
| InterPro | IPR011042. 6-blade_b-propeller_TolB-like. IPR000742. EG-like_dom. IPR023415. LDLR_class-A_CS. IPR000033. LDLR_classB_rpt. IPR002172. LDrepeatLR_classA_rpt. IPR017049. Low_density_Lipo_rcpt-rel_p5/6. [Graphical view] |
| Pfam | PF00057. Ldl_recept_a. 3 hits. PF00058. Ldl_recept_b. 13 hits. [Graphical view] |
| PIRSF | PIRSF036314. LDL_recpt-rel_p5/6. 1 hit. |
| SMART | SM00181. EGF. 4 hits. SM00192. LDLa. 3 hits. SM00135. LY. 20 hits. [Graphical view] |
| SUPFAM | SSF57424. LDL_rcpt_classA_cys-rich. 3 hits. |
| PROSITE | PS00022. EGF_1. False negative. PS01186. EGF_2. 1 hit. PS50026. EGF_3. False negative. PS01209. LDLRA_1. 3 hits. PS50068. LDLRA_2. 3 hits. PS51120. LDLRB. 20 hits. [Graphical view] |
| ProtoNet | Search... |
Other | |
| NextBio | 291034. |
| SOURCE | Search... |
Entry information
| Entry name | LRP6_MOUSE | ||||||||
| Accession | Primary (citable) accession number: O88572 | ||||||||
| Entry history |
| ||||||||
| Entry status | Reviewed (UniProtKB/Swiss-Prot) | ||||||||
| Annotation program | Chordata Protein Annotation Program | ||||||||
Relevant documents
| MGD cross-references Mouse Genome Database (MGD) cross-references in UniProtKB/Swiss-Prot |
| SIMILARITY comments Index of protein domains and families |

Clusters with
