Biology:Parathyroid hormone 1 receptor

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Short description: Protein-coding gene in the species Homo sapiens


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Generic protein structure example

Parathyroid hormone/parathyroid hormone-related peptide receptor, also known as parathyroid hormone 1 receptor (PTH1R), is a protein that in humans is encoded by the PTH1R gene. PTH1R functions as a receptor for parathyroid hormone (PTH) and for parathyroid hormone-related protein (PTHrP), also called parathyroid hormone-like hormone (PTHLH).

Function

This "classical" PTH receptor is expressed in high levels in bone and kidney and regulates calcium ion homeostasis through activation of adenylate cyclase and phospholipase C.[1][2] In bone, it is expressed on the surface of osteoblasts. When the receptor is activated through PTH binding, osteoblasts express RANKL (Receptor Activator of Nuclear Factor kB Ligand), which binds to RANK (Receptor Activator of Nuclear Factor kB) on osteoclasts. This turns on osteoclasts to ultimately increase the resorption rate.

Mechanism

It is a member of the secretin family of G protein-coupled receptors. The activity of this receptor is mediated by Gs G proteins, which activate adenylyl cyclase. Besides this, they also activate the phosphatidylinositol-calcium second messenger system.

Pathology

Defects in this receptor are known to be the cause of Jansen's metaphyseal chondrodysplasia (JMC) and chondrodysplasia Blomstrand type (BOCD) as well as enchondromatosis[3] and primary failure of tooth eruption.[4]

Interactions

Parathyroid hormone 1 receptor has been shown to interact with Sodium-hydrogen exchange regulatory cofactor 2[5] and Sodium-hydrogen antiporter 3 regulator 1.[5]

See also

References

  1. "Receptors for PTH and PTHrP: their biological importance and functional properties". The American Journal of Physiology 277 (5 Pt 2): F665-75. Nov 1999. doi:10.1152/ajprenal.1999.277.5.F665. PMID 10564229. http://ajprenal.physiology.org/cgi/content/abstract/277/5/F665. Retrieved 2007-12-17. 
  2. "G alpha q family members couple parathyroid hormone (PTH)/PTH-related peptide and calcitonin receptors to phospholipase C in COS-7 cells". Molecular Endocrinology 10 (5): 566–74. May 1996. doi:10.1210/mend.10.5.8732687. PMID 8732687. 
  3. "Entrez Gene: PTH1R parathyroid hormone 1 receptor". https://www.ncbi.nlm.nih.gov/sites/entrez?Db=gene&Cmd=ShowDetailView&TermToSearch=5745. 
  4. "Exome resequencing combined with linkage analysis identifies novel PTH1R variants in primary failure of tooth eruption in Japanese". Journal of Bone and Mineral Research 26 (7): 1655–61. Jul 2011. doi:10.1002/jbmr.385. PMID 21404329. 
  5. 5.0 5.1 "Na(+)/H(+ ) exchanger regulatory factor 2 directs parathyroid hormone 1 receptor signalling". Nature 417 (6891): 858–61. Jun 2002. doi:10.1038/nature00816. PMID 12075354. Bibcode2002Natur.417..858M. 

Further reading

External links

This article incorporates text from the United States National Library of Medicine, which is in the public domain.