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INSRR

From Wikipedia, the free encyclopedia

INSRR
Identifiers
AliasesINSRR, IRR, insulin receptor related receptor
External IDsOMIM: 147671; MGI: 1346037; HomoloGene: 56539; GeneCards: INSRR; OMA:INSRR - orthologs
Enzyme activity
EC #BRENDAExPASyKEGGMetaCyc
2.7.10.1
Orthologs
SpeciesHumanMouse
Entrez
Ensembl
UniProt
RefSeq (mRNA)

NM_014215

NM_011832

RefSeq (protein)

NP_055030

NP_035962

Location (UCSC)Chr 1: 156.84 – 156.86 MbChr 3: 87.7 – 87.72 Mb
PubMed search[3][4]
Wikidata
View/Edit HumanView/Edit Mouse

Insulin receptor-related protein is a protein that in humans is encoded by the INSRR gene.[5][6][7]

Function

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The encoded protein, commonly abbreviated IRR, is an orphan receptor and one of three receptor tyrosine kinases in the insulin receptor family, alongside the insulin receptor and insulin-like growth factor 1 receptor. No endogenous peptide or protein ligand is known for IRR. In experimental systems, extracellular pH above approximately 7.9 activates the receptor and triggers autophosphorylation.[8][9]

The Human Protein Atlas classifies INSRR RNA expression as cell type enhanced in renal collecting-duct intercalated cells.[10] In rodents, IRR has been localized to non-A intercalated cells;[11] a rat study reported basolateral localization in type B intercalated cells of the cortical collecting duct.[12] In mice, inactivation of Insrr impairs urinary bicarbonate excretion following alkali loading, supporting a role for the receptor in renal acid–base homeostasis.[13][9]

A 2023 cryo-electron microscopy study of the human IRR ectodomain, combined with mutagenesis and cell-based assays, supported a model in which alkaline pH produces electrostatic repulsion involving pH-sensitive motifs at an interprotomer interface, disrupting the autoinhibited state and promoting a scissor-like rotation into a T-shaped active conformation.[14]

References

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  1. 1 2 3 GRCh38: Ensembl release 89: ENSG00000027644 Ensembl, May 2017
  2. 1 2 3 GRCm38: Ensembl release 89: ENSMUSG00000005640 Ensembl, May 2017
  3. "Human PubMed Reference:". National Center for Biotechnology Information, U.S. National Library of Medicine.
  4. "Mouse PubMed Reference:". National Center for Biotechnology Information, U.S. National Library of Medicine.
  5. Shier P, Watt VM (5 September 1989). "Primary structure of a putative receptor for a ligand of the insulin family". J Biol Chem. 264 (25): 14605–8. doi:10.1016/S0021-9258(18)63737-8. PMID 2768234.
  6. Shier P, Willard HF, Watt VM (1990). "Localization of the insulin receptor-related receptor gene to human chromosome 1". Cytogenet Cell Genet. 54 (1–2): 80–1. doi:10.1159/000132963. PMID 2249481.
  7. "Entrez Gene: INSRR insulin receptor-related receptor".
  8. Petrenko AG, Zozulya SA, Deyev IE, Eladari D (October 2013). "Insulin receptor-related receptor as an extracellular pH sensor involved in the regulation of acid–base balance". Biochim. Biophys. Acta. 1834 (10): 2170–2175. doi:10.1016/j.bbapap.2012.11.011. PMID 23220417.
  9. 1 2 Deyev IE, Sohet F, Vassilenko KP, Serova OV, Popova NV, Zozulya SA, et al. (June 2011). "Insulin receptor-related receptor as an extracellular alkali sensor". Cell Metab. 13 (6): 679–689. doi:10.1016/j.cmet.2011.03.022. PMC 3119365. PMID 21641549.
  10. "INSRR – Single cell type". The Human Protein Atlas. Retrieved 30 July 2026.
  11. Bates CM, Merenmies JM, Kelly-Spratt KS, Parada LF (September 1997). "Insulin receptor-related receptor expression in non-A intercalated cells in the kidney". Kidney Int. 52 (3): 674–681. doi:10.1038/ki.1997.381. PMID 9291186.
  12. Ozaki K, Takada N, Tsujimoto K, Tsuji N, Kawamura T, Muso E, Ohta M, Itoh N (September 1997). "Localization of insulin receptor-related receptor in the rat kidney". Kidney Int. 52 (3): 694–698. doi:10.1038/ki.1997.384. PMID 9291189.
  13. Brown D, Wagner CA (May 2012). "Molecular mechanisms of acid-base sensing by the kidney". J. Am. Soc. Nephrol. 23 (5): 774–780. doi:10.1681/ASN.2012010029. PMC 3338302. PMID 22362904.
  14. Wang L, Hall C, Li J, Choi E, Bai XC (May 2023). "Structural basis of the alkaline pH-dependent activation of insulin receptor-related receptor". Nat. Struct. Mol. Biol. 30 (5): 661–669. doi:10.1038/s41594-023-00974-0. PMC 10465182. PMID 37055497.

Further reading

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