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== Prokineticin receptor 1 ==
{{Infobox protein
| name = Prokineticin receptor 1
| image =
| width =
| caption =
| symbol = PROKR1
| HGNCid = 17847
| OMIM = 607122
| EntrezGene = 128674
| RefSeq = NM_138964
| UniProt = Q8NFJ6
| chromosome = 2
| arm = q
| band = 14.1
}}


Prokineticin receptor 1 (PKR1) is a G protein-coupled receptor that plays a crucial role in various physiological processes. It is encoded by the PROKR1 gene and is primarily expressed in the central nervous system, reproductive system, and gastrointestinal tract.
'''Prokineticin receptor 1''' ('''PROKR1''') is a [[G protein-coupled receptor]] that binds to [[prokineticins]], a family of secreted proteins involved in various physiological processes. This receptor is encoded by the '''PROKR1''' gene located on [[chromosome 2]] in humans.


=== Structure ===
==Structure==
PROKR1 is a member of the [[G protein-coupled receptor]] (GPCR) family, characterized by seven transmembrane domains. These receptors are integral membrane proteins that transduce extracellular signals through the activation of [[G proteins]]. The structure of PROKR1 allows it to interact with its ligands, the prokineticins, and initiate intracellular signaling cascades.


PKR1 belongs to the class A rhodopsin-like family of G protein-coupled receptors. It consists of seven transmembrane helices, an extracellular N-terminus, and an intracellular C-terminus. The receptor undergoes conformational changes upon ligand binding, leading to the activation of downstream signaling pathways.
==Function==
The primary function of PROKR1 is to mediate the effects of prokineticins, which are involved in a variety of biological processes. These include:


=== Function ===
* '''[[Angiogenesis]]''': PROKR1 plays a role in the formation of new blood vessels, a process crucial for [[wound healing]] and [[tumor growth]].
* '''[[Inflammation]]''': It is involved in the modulation of inflammatory responses, potentially influencing conditions such as [[asthma]] and [[arthritis]].
* '''[[Reproductive system]]''': PROKR1 is expressed in the [[ovary]] and [[testis]], suggesting a role in [[reproduction]] and [[fertility]].
* '''[[Circadian rhythm]]''': It may influence the regulation of circadian rhythms, affecting sleep-wake cycles and other physiological processes.


PKR1 is the receptor for prokineticins, a family of small secreted proteins that regulate diverse biological processes. Upon binding to PKR1, prokineticins activate intracellular signaling cascades, including the Gαq/11 and Gαs pathways. These pathways mediate various cellular responses, such as calcium mobilization, cAMP production, and activation of mitogen-activated protein kinases (MAPKs).
==Pathophysiology==
Alterations in PROKR1 function or expression have been implicated in several pathological conditions:


The activation of PKR1 has been implicated in several physiological functions, including regulation of circadian rhythms, neurogenesis, angiogenesis, and inflammation. Additionally, PKR1 is involved in the control of reproductive processes, such as fertility, pregnancy, and parturition.
* '''[[Cancer]]''': Overexpression of PROKR1 has been observed in certain types of cancer, where it may contribute to tumor progression through its pro-angiogenic effects.
* '''[[Cardiovascular disease]]''': Dysregulation of PROKR1 signaling can affect [[blood pressure]] and [[vascular tone]], potentially leading to [[hypertension]] and other cardiovascular disorders.
* '''[[Infertility]]''': Mutations or altered expression of PROKR1 may impact reproductive health, leading to infertility or subfertility.


=== Clinical Significance ===
==Clinical Significance==
Given its involvement in critical physiological processes, PROKR1 is a potential target for therapeutic intervention. Modulating its activity could have implications for treating diseases such as cancer, cardiovascular disorders, and inflammatory conditions.


Mutations in the PROKR1 gene have been associated with various disorders. Loss-of-function mutations in PKR1 have been linked to Kallmann syndrome, a genetic disorder characterized by hypogonadotropic hypogonadism and anosmia (lack of sense of smell). This suggests that PKR1 is essential for the development and function of the reproductive system and olfactory system.
==Research Directions==
Ongoing research is focused on understanding the detailed mechanisms of PROKR1 signaling and its interactions with prokineticins. This includes:


Furthermore, dysregulation of PKR1 signaling has been implicated in the pathogenesis of several diseases, including cancer, cardiovascular diseases, and inflammatory bowel disease. Targeting PKR1 signaling pathways may hold therapeutic potential for the treatment of these conditions.
* Developing selective agonists and antagonists to modulate PROKR1 activity.
* Investigating the role of PROKR1 in [[neurobiology]] and its potential impact on [[neurological disorders]].
* Exploring the genetic variations in the PROKR1 gene and their association with disease susceptibility.


=== References ===
==See Also==
* [[Prokineticin receptor 2]]
* [[G protein-coupled receptor]]
* [[Prokineticin]]


<references>
==External Links==
<ref>Sample Reference 1</ref>
* [GeneCards: PROKR1](https://www.genecards.org/cgi-bin/carddisp.pl?gene=PROKR1)
<ref>Sample Reference 2</ref>
* [UniProt: Q8NFJ6](https://www.uniprot.org/uniprot/Q8NFJ6)
</references>


== See Also ==
{{Receptor-stub}}
 
* [[Prokineticin receptor 2]]
* [[G protein-coupled receptor]]
* [[Kallmann syndrome]]


[[Category:G protein-coupled receptors]]
[[Category:G protein-coupled receptors]]
[[Category:Neuroscience]]
[[Category:Human proteins]]
[[Category:Reproductive system]]
[[Category:Chromosome 2 genes]]
[[Category:Gastrointestinal system]]
[[Category:Genes]]
[[Category:Proteins]]

Revision as of 12:38, 31 December 2024


Prokineticin receptor 1 (PROKR1) is a G protein-coupled receptor that binds to prokineticins, a family of secreted proteins involved in various physiological processes. This receptor is encoded by the PROKR1 gene located on chromosome 2 in humans.

Structure

PROKR1 is a member of the G protein-coupled receptor (GPCR) family, characterized by seven transmembrane domains. These receptors are integral membrane proteins that transduce extracellular signals through the activation of G proteins. The structure of PROKR1 allows it to interact with its ligands, the prokineticins, and initiate intracellular signaling cascades.

Function

The primary function of PROKR1 is to mediate the effects of prokineticins, which are involved in a variety of biological processes. These include:

Pathophysiology

Alterations in PROKR1 function or expression have been implicated in several pathological conditions:

  • Cancer: Overexpression of PROKR1 has been observed in certain types of cancer, where it may contribute to tumor progression through its pro-angiogenic effects.
  • Cardiovascular disease: Dysregulation of PROKR1 signaling can affect blood pressure and vascular tone, potentially leading to hypertension and other cardiovascular disorders.
  • Infertility: Mutations or altered expression of PROKR1 may impact reproductive health, leading to infertility or subfertility.

Clinical Significance

Given its involvement in critical physiological processes, PROKR1 is a potential target for therapeutic intervention. Modulating its activity could have implications for treating diseases such as cancer, cardiovascular disorders, and inflammatory conditions.

Research Directions

Ongoing research is focused on understanding the detailed mechanisms of PROKR1 signaling and its interactions with prokineticins. This includes:

  • Developing selective agonists and antagonists to modulate PROKR1 activity.
  • Investigating the role of PROKR1 in neurobiology and its potential impact on neurological disorders.
  • Exploring the genetic variations in the PROKR1 gene and their association with disease susceptibility.

See Also

External Links

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