Urokinase receptor: Difference between revisions

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<!-- The PBB_Controls template provides controls for Protein Box Bot, please see Template:PBB_Controls for details. -->
{{Infobox_gene}}
{{PBB_Controls
The '''Urokinase receptor''', also known as [[Urokinase|uPA]] receptor or uPAR or '''CD87''' ('''C'''luster of '''D'''ifferentiation '''87'''), is a multidomain [[glycoprotein]] tethered to the [[cell membrane]] with a [[GPI anchor|glycosylphosphotidylinositol]] (GPI) anchor. uPAR was originally identified as a saturable binding site for urokinase on the cell surface.
| update_page = yes
| require_manual_inspection = no
| update_protein_box = yes
| update_summary = no
| update_citations = yes
}}
 
<!-- The GNF_Protein_box is automatically maintained by Protein Box Bot.  See Template:PBB_Controls to Stop updates. -->
{{GNF_Protein_box
| image = 
| image_source = 
| PDB = {{PDB2|1ywh}}, {{PDB2|2fd6}}, {{PDB2|2i9b}}
| Name = Plasminogen activator, urokinase receptor
| HGNCid = 9053
| Symbol = PLAUR
| AltSymbols =; CD87; UPAR; URKR
| OMIM = 173391
| ECnumber = 
| Homologene = 48120
| MGIid = 97612
| GeneAtlas_image1 = PBB_GE_PLAUR_210845_s_at_tn.png
| GeneAtlas_image2 = PBB_GE_PLAUR_211924_s_at_tn.png
| GeneAtlas_image3 = PBB_GE_PLAUR_214866_at_tn.png
| Function = {{GNF_GO|id=GO:0019899 |text = enzyme binding}} {{GNF_GO|id=GO:0030377 |text = U-plasminogen activator receptor activity}} {{GNF_GO|id=GO:0048503 |text = GPI anchor binding}}
| Component = {{GNF_GO|id=GO:0005886 |text = plasma membrane}} {{GNF_GO|id=GO:0009986 |text = cell surface}} {{GNF_GO|id=GO:0016021 |text = integral to membrane}} {{GNF_GO|id=GO:0019898 |text = extrinsic to membrane}}
| Process = {{GNF_GO|id=GO:0006928 |text = cell motility}} {{GNF_GO|id=GO:0006935 |text = chemotaxis}} {{GNF_GO|id=GO:0007166 |text = cell surface receptor linked signal transduction}} {{GNF_GO|id=GO:0007596 |text = blood coagulation}} {{GNF_GO|id=GO:0030162 |text = regulation of proteolysis}}
| Orthologs = {{GNF_Ortholog_box
    | Hs_EntrezGene = 5329
    | Hs_Ensembl = ENSG00000011422
    | Hs_RefseqProtein = NP_001005376
    | Hs_RefseqmRNA = NM_001005376
    | Hs_GenLoc_db = 
    | Hs_GenLoc_chr = 19
    | Hs_GenLoc_start = 48842111
    | Hs_GenLoc_end = 48866539
    | Hs_Uniprot = Q03405
    | Mm_EntrezGene = 18793
    | Mm_Ensembl = ENSMUSG00000046223
    | Mm_RefseqmRNA = NM_011113
    | Mm_RefseqProtein = NP_035243
    | Mm_GenLoc_db = 
    | Mm_GenLoc_chr = 7
    | Mm_GenLoc_start = 24171260
    | Mm_GenLoc_end = 24184727
    | Mm_Uniprot = Q3U2D1
  }}
}}
The '''Urokinase receptor''', also known as [[Urokinase|uPA]] receptor or uPAR or '''CD87''' ('''C'''luster of '''D'''ifferentiation '''87'''), is multidomain [[glycoprotein]] tethered to the [[cell membrane]] with a [[glycosylphosphotidylinositol]] (GPI) anchor. uPAR was originally identified as a saturable binding site for urokinase on the cell surface.


== Molecular characteristics ==
== Molecular characteristics ==
uPAR consists of three different domains of the Ly-6/uPAR/alpha-neurotoxin family. All three domains are necessary for high affinity binding of the primary ligand, urokinase. It has been possible to express uPAR recombinantly in [[Chinese Hamster Ovary cell|CHO-cell]]s and [[S2]] cells from ''[[Drosophila melanogaster]]''. 4 out of 5 of the possible [[glycosylation]] sites are used in vivo giving the [[protein]] a [[molecular weight]] of 50-60 kDA. Recently the structure of uPAR was solved by [[X-ray crystallography]] in complex with an [[peptide]] [[receptor antagonist|antagonist]]<ref>Crystal structure of the human urokinase plasminogen activator receptor bound to an antagonist peptide. Llinas P, Le Du MH, Gardsvoll H, Dano K, Ploug M, Gilquin B, Stura EA, Menez A. EMBO J. 2005 May 4;24(9):1655-63. Epub 2005 Apr 7. (full text article online: {{Entrez Pubmed|15861141}}).</ref> and with its native ligand, urokinase<ref>Structure of human urokinase plasminogen activator in complex with its receptor. Huai Q, Mazar AP, Kuo A, Parry GC, Shaw DE, Callahan J, Li Y, Yuan C, Bian C, Chen L, Furie B, Furie BC, Cines DB, Huang M., Science. 2006 Feb 3;311(5761):656-9. {{Entrez Pubmed|16456079}}).</ref>.
uPAR consists of three different [[protein domain|domains]] of the [[three-finger protein]] domain family, which also includes domains found in [[LY6|lymphocyte antigen 6]] and in [[snake venom]] toxins of the [[three-finger toxin]] family, such as [[alpha-neurotoxin]]s.<ref name="kessler_2017">{{cite journal |last1=Kessler |first1=Pascal |last2=Marchot |first2=Pascale |last3=Silva |first3=Marcela |last4=Servent |first4=Denis |title=The three-finger toxin fold: a multifunctional structural scaffold able to modulate cholinergic functions |journal=Journal of Neurochemistry |date=August 2017 |volume=142 |pages=7–18 |doi=10.1111/jnc.13975}}</ref> All three three-finger domains are necessary for high affinity binding of the primary ligand, urokinase. It has been possible to express uPAR recombinantly in [[Chinese Hamster Ovary cell|CHO-cell]]s and [[Schneider 2 cells|S2]] cells from ''[[Drosophila melanogaster]]''. 4 out of 5 of the possible [[glycosylation]] sites are used in vivo giving the [[protein]] a [[molecular weight]] of 50-60 kDA. Recently the structure of uPAR was solved by [[X-ray crystallography]] in complex with a [[peptide]] [[receptor antagonist|antagonist]]<ref>{{cite journal | vauthors = Llinas P, Le Du MH, Gårdsvoll H, Danø K, Ploug M, Gilquin B, Stura EA, Ménez A | title = Crystal structure of the human urokinase plasminogen activator receptor bound to an antagonist peptide | journal = The EMBO Journal | volume = 24 | issue = 9 | pages = 1655–63 | date = May 2005 | pmid = 15861141 | pmc = 1142576 | doi = 10.1038/sj.emboj.7600635 }}</ref> and with its native ligand, urokinase.<ref>{{cite journal | vauthors = Huai Q, Mazar AP, Kuo A, Parry GC, Shaw DE, Callahan J, Li Y, Yuan C, Bian C, Chen L, Furie B, Furie BC, Cines DB, Huang M | title = Structure of human urokinase plasminogen activator in complex with its receptor | journal = Science | volume = 311 | issue = 5761 | pages = 656–9 | date = February 2006 | pmid = 16456079 | doi = 10.1126/science.1121143 | url = http://www.sciencemag.org/cgi/pmidlookup?view=short&pmid=16456079 }}</ref>


Besides the primary [[ligand]] [[urokinase]], uPAR interacts with several other [[proteins]], among others: [[vitronectin]], the uPAR associated protein ([[uPARAP]]) and the [[integrin]] family of [[membrane proteins]].
Besides the primary [[ligand]] [[urokinase]], uPAR interacts with several other [[proteins]], among others: [[vitronectin]], the uPAR associated protein ([[uPARAP]]) and the [[integrin]] family of [[membrane proteins]].


== Physiological significance ==
== Physiological significance ==
uPAR is a part of the [[plasminogen activation system]], which in the healthy body is involved in tissue reorganization events such as [[mammary gland]] involution and [[wound healing]]. In order to be able to reorganize tissue it is important, that the old tissue can be degraded. An important mechanism in this degradation is the [[proteolysis]] cascade initiated by the [[plasminogen activation system]]. uPAR binds [[urokinase]] and thus restricts [[plasminogen]] activation to the immediate vicinity of the [[cell membrane]]. Thus uPAR seems to be an important player in the regulation of this process.
uPAR is a part of the [[plasminogen]] activation system, which in the healthy body is involved in tissue reorganization events such as [[mammary gland]] involution and [[wound healing]]. In order to be able to reorganize tissue, the old tissue must be able to be degraded. An important mechanism in this degradation is the [[proteolysis]] cascade initiated by the plasminogen activation system. uPAR binds urokinase and thus restricts plasminogen activation to the immediate vicinity of the cell membrane. Thus uPAR seems to be an important player in the regulation of this process.


However the components of the [[plasminogen activation system]] have been found to be highly expressed in many [[malignant]] [[tumor]]s, indicating that tumors are able to [[wiktionary:Hijack|hijack]] the system, and use it in [[metastasis]]. Thus [[Enzyme inhibitor|inhibitor]]s of the various components of the plasminogen activation system has been sought as possible anticancer drugs.
However the components of the plasminogen activation system have been found to be highly expressed in many [[malignant]] [[tumor]]s, indicating that tumors are able to hijack the system, and use it in [[metastasis]]. Thus [[Enzyme inhibitor|inhibitor]]s of the various components of the plasminogen activation system have been sought as possible anticancer drugs.


uPAR has been involved in various other non-proteolytical processes related to cancer, such as [[cell migration]], [[cell cycle]] regulation and cell adhesion.
uPAR has been involved in various other non-proteolytical processes related to cancer, such as [[cell migration]], [[cell cycle]] regulation, and cell adhesion.
 
When uPA is bound to the receptor, there is cleavage between the GPI-anchor and the uPAR, releasing [[suPAR]].<ref>{{cite journal | vauthors = Thunø M, Macho B, Eugen-Olsen J | title = suPAR: the molecular crystal ball | journal = Disease Markers | volume = 27 | issue = 3 | pages = 157–72 | year = 2009 | pmid = 19893210 | doi = 10.3233/DMA-2009-0657 | url = http://iospress.metapress.com/openurl.asp?genre=article&issn=0278-0240&volume=27&issue=3&spage=157 }}</ref>
 
== Interactions ==
 
Urokinase receptor has been shown to [[Protein-protein interaction|interact]] with [[LRP1]].<ref name=pmid11359936>{{cite journal | vauthors = Czekay RP, Kuemmel TA, Orlando RA, Farquhar MG | title = Direct binding of occupied urokinase receptor (uPAR) to LDL receptor-related protein is required for endocytosis of uPAR and regulation of cell surface urokinase activity | journal = Molecular Biology of the Cell | volume = 12 | issue = 5 | pages = 1467–79 | date = May 2001 | pmid = 11359936 | pmc = 34598 | doi = 10.1091/mbc.12.5.1467 }}</ref>


== See also ==
== See also ==
Line 69: Line 27:
* [[Plasminogen activation system]]
* [[Plasminogen activation system]]
* [[Urokinase]]
* [[Urokinase]]
* [[suPAR]]


== References ==
== References ==
{{reflist|2}}
{{reflist}}


==Further reading==
== Further reading ==
{{refbegin | 2}}
{{refbegin | 2}}
*Structure-Function Relationships in the Interaction Between the Urokinase-Type Plasminogen Activator and its Receptor. Ploug, M. Curr Pharm Des. 2003;9(19):1499-528. PMID 12871065.
* {{cite journal | vauthors = Ploug M | title = Structure-function relationships in the interaction between the urokinase-type plasminogen activator and its receptor | journal = Current Pharmaceutical Design | volume = 9 | issue = 19 | pages = 1499–528 | year = 2003 | pmid = 12871065 | doi = 10.2174/1381612033454630 | url = http://www.benthamdirect.org/pages/content.php?CPD/2003/00000009/00000019/0003B.SGM }}
{{PBB_Further_reading
* {{cite journal | vauthors = Kjøller L | title = The urokinase plasminogen activator receptor in the regulation of the actin cytoskeleton and cell motility | journal = Biological Chemistry | volume = 383 | issue = 1 | pages = 5–19 | date = January 2002 | pmid = 11928822 | doi = 10.1515/BC.2002.002 }}
| citations =  
* {{cite journal | vauthors = Chavakis T, Kanse SM, May AE, Preissner KT | title = Haemostatic factors occupy new territory: the role of the urokinase receptor system and kininogen in inflammation | journal = Biochemical Society Transactions | volume = 30 | issue = 2 | pages = 168–73 | date = April 2002 | pmid = 12023845 | doi = 10.1042/BST0300168 }}
*{{cite journal | author=Kjøller L |title=The urokinase plasminogen activator receptor in the regulation of the actin cytoskeleton and cell motility. |journal=Biol. Chem. |volume=383 |issue= 1 |pages= 5-19 |year= 2003 |pmid= 11928822 |doi= }}
* {{cite journal | vauthors = Ploug M, Gårdsvoll H, Jørgensen TJ, Lønborg Hansen L, Danø K | title = Structural analysis of the interaction between urokinase-type plasminogen activator and its receptor: a potential target for anti-invasive cancer therapy | journal = Biochemical Society Transactions | volume = 30 | issue = 2 | pages = 177–83 | date = April 2002 | pmid = 12023847 | doi = 10.1042/BST0300177 }}
*{{cite journal | author=Chavakis T, Kanse SM, May AE, Preissner KT |title=Haemostatic factors occupy new territory: the role of the urokinase receptor system and kininogen in inflammation. |journal=Biochem. Soc. Trans. |volume=30 |issue= 2 |pages= 168-73 |year= 2002 |pmid= 12023845 |doi= 10.1042/ }}
* {{cite journal | vauthors = Alfano M, Sidenius N, Blasi F, Poli G | title = The role of urokinase-type plasminogen activator (uPA)/uPA receptor in HIV-1 infection | journal = Journal of Leukocyte Biology | volume = 74 | issue = 5 | pages = 750–6 | date = November 2003 | pmid = 12960238 | doi = 10.1189/jlb.0403176 }}
*{{cite journal | author=Ploug M, Gårdsvoll H, Jørgensen TJ, ''et al.'' |title=Structural analysis of the interaction between urokinase-type plasminogen activator and its receptor: a potential target for anti-invasive cancer therapy. |journal=Biochem. Soc. Trans. |volume=30 |issue= 2 |pages= 177-83 |year= 2002 |pmid= 12023847 |doi= 10.1042/ }}
* {{cite journal | vauthors = Alfano D, Franco P, Vocca I, Gambi N, Pisa V, Mancini A, Caputi M, Carriero MV, Iaccarino I, Stoppelli MP | title = The urokinase plasminogen activator and its receptor: role in cell growth and apoptosis | journal = Thrombosis and Haemostasis | volume = 93 | issue = 2 | pages = 205–11 | date = February 2005 | pmid = 15711734 | doi = 10.1160/TH04-09-0592 }}
*{{cite journal | author=Alfano M, Sidenius N, Blasi F, Poli G |title=The role of urokinase-type plasminogen activator (uPA)/uPA receptor in HIV-1 infection. |journal=J. Leukoc. Biol. |volume=74 |issue= 5 |pages= 750-6 |year= 2004 |pmid= 12960238 |doi= 10.1189/jlb.0403176 }}
*{{cite journal | author=Alfano D, Franco P, Vocca I, ''et al.'' |title=The urokinase plasminogen activator and its receptor: role in cell growth and apoptosis. |journal=Thromb. Haemost. |volume=93 |issue= 2 |pages= 205-11 |year= 2005 |pmid= 15711734 |doi= 10.1267/THRO05020205 }}
}}
{{refend}}
{{refend}}


==External links==
== External links ==
* {{MeshName|PLAUR+protein,+human}}
* {{MeshName|PLAUR+protein,+human}}


{{PDB Gallery|geneid=5329}}
{{Clusters of differentiation}}
{{Clusters of differentiation}}
[[Category:Clusters of differentiation]]
[[Category:Clusters of differentiation]]
{{WikiDoc Sources}}

Latest revision as of 21:18, 1 January 2019

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The Urokinase receptor, also known as uPA receptor or uPAR or CD87 (Cluster of Differentiation 87), is a multidomain glycoprotein tethered to the cell membrane with a glycosylphosphotidylinositol (GPI) anchor. uPAR was originally identified as a saturable binding site for urokinase on the cell surface.

Molecular characteristics

uPAR consists of three different domains of the three-finger protein domain family, which also includes domains found in lymphocyte antigen 6 and in snake venom toxins of the three-finger toxin family, such as alpha-neurotoxins.[1] All three three-finger domains are necessary for high affinity binding of the primary ligand, urokinase. It has been possible to express uPAR recombinantly in CHO-cells and S2 cells from Drosophila melanogaster. 4 out of 5 of the possible glycosylation sites are used in vivo giving the protein a molecular weight of 50-60 kDA. Recently the structure of uPAR was solved by X-ray crystallography in complex with a peptide antagonist[2] and with its native ligand, urokinase.[3]

Besides the primary ligand urokinase, uPAR interacts with several other proteins, among others: vitronectin, the uPAR associated protein (uPARAP) and the integrin family of membrane proteins.

Physiological significance

uPAR is a part of the plasminogen activation system, which in the healthy body is involved in tissue reorganization events such as mammary gland involution and wound healing. In order to be able to reorganize tissue, the old tissue must be able to be degraded. An important mechanism in this degradation is the proteolysis cascade initiated by the plasminogen activation system. uPAR binds urokinase and thus restricts plasminogen activation to the immediate vicinity of the cell membrane. Thus uPAR seems to be an important player in the regulation of this process.

However the components of the plasminogen activation system have been found to be highly expressed in many malignant tumors, indicating that tumors are able to hijack the system, and use it in metastasis. Thus inhibitors of the various components of the plasminogen activation system have been sought as possible anticancer drugs.

uPAR has been involved in various other non-proteolytical processes related to cancer, such as cell migration, cell cycle regulation, and cell adhesion.

When uPA is bound to the receptor, there is cleavage between the GPI-anchor and the uPAR, releasing suPAR.[4]

Interactions

Urokinase receptor has been shown to interact with LRP1.[5]

See also

References

  1. Kessler, Pascal; Marchot, Pascale; Silva, Marcela; Servent, Denis (August 2017). "The three-finger toxin fold: a multifunctional structural scaffold able to modulate cholinergic functions". Journal of Neurochemistry. 142: 7–18. doi:10.1111/jnc.13975.
  2. Llinas P, Le Du MH, Gårdsvoll H, Danø K, Ploug M, Gilquin B, Stura EA, Ménez A (May 2005). "Crystal structure of the human urokinase plasminogen activator receptor bound to an antagonist peptide". The EMBO Journal. 24 (9): 1655–63. doi:10.1038/sj.emboj.7600635. PMC 1142576. PMID 15861141.
  3. Huai Q, Mazar AP, Kuo A, Parry GC, Shaw DE, Callahan J, Li Y, Yuan C, Bian C, Chen L, Furie B, Furie BC, Cines DB, Huang M (February 2006). "Structure of human urokinase plasminogen activator in complex with its receptor". Science. 311 (5761): 656–9. doi:10.1126/science.1121143. PMID 16456079.
  4. Thunø M, Macho B, Eugen-Olsen J (2009). "suPAR: the molecular crystal ball". Disease Markers. 27 (3): 157–72. doi:10.3233/DMA-2009-0657. PMID 19893210.
  5. Czekay RP, Kuemmel TA, Orlando RA, Farquhar MG (May 2001). "Direct binding of occupied urokinase receptor (uPAR) to LDL receptor-related protein is required for endocytosis of uPAR and regulation of cell surface urokinase activity". Molecular Biology of the Cell. 12 (5): 1467–79. doi:10.1091/mbc.12.5.1467. PMC 34598. PMID 11359936.

Further reading

External links