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Phosphorylation of intracellular serine and threonine residues is the most important post translational modification of G protein-coupled receptors (GPCRs) also called heptahelical or seven transmembrane receptors (7TMR). After agonist exposure, these receptors acquire an active conformation, which is recognized by a family of highly specialized GPCR kinases (GRKs). Agonist-driven phosphorylation by GRKs regulates acute receptor desensitization, arrestin recruitment, internalization, post-activation signaling, long-term tolerance and drug addiction. Phosphosite-specific 7TM antibodies are designed to specifically detect agonist-activated GPCRs. In fact, recent work shows that ligand profiling using phosphosite-specific 7TM antibodies provides valuble information on ligand bias beyond that obtained with conventional ß-arrestin recruitment assays. Phosphosite-specific 7TM antibodies are novel tools for GPCR research that can be used to:

  • profile agonist properties of novel GPCR ligands
  • decipher the phosphorylation barcode of GPCRs
  • determine the spatial and temporal dynamics of receptor phosphorylation
  • identify relevant kinases and phosphatases for GPCR phosphorylation and dephosphoryation

Lifecycle3

Schematic representation of the G protein-coupled receptor phosphorylation / dephosphorylation cycle. GRK, G protein-coupled receptor kinase; PKC, protein kinase C; cPP1, catalytic subunit of protein phosphatase 1; R*, activated GPCR; CCP, clathrin-coated pit. 

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SST3 (non-phospho), Somatostatin Receptor 3 Antibody
SST3 (non-phospho), Somatostatin Receptor 3...
The non-phospho-SST3 receptor antibody is directed against the distal end of the carboxyl-terminal tail of human SST3. In can be used to detect total SST3 receptors in Western blots independent of phosphorylation. The non-phospho-SST3...
$ 375.00 *
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KO-Validated
SST2 (non-phospho), Somatostatin Receptor 2 Antibody
SST2 (non-phospho), Somatostatin Receptor 2...
The non-phospho-SST2 receptor antibody is directed against the distal end of the carboxyl-terminal tail of mouse, rat and human SST2. It detects selectively the canonical form of SST2 (also referred to as SST2A) and not the putative...
$ 375.00 *
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SST1 (IHC-grade), Somatostatin Receptor 1 Antibody
SST1 (IHC-grade), Somatostatin Receptor 1 Antibody
The SST1 receptor antibody is directed against the distal end of the carboxyl-terminal tail of human Somatostatin Receptor 1. It can be used to detect total SST1 receptors in Western blots independent of phosphorylation. The SST1...
$ 375.00 *
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SST1 (non-phospho-Somatostatin Receptor 1 Antibody)
SST1 (non-phospho-Somatostatin Receptor 1...
The SST1 receptor antibody is directed against the distal end of the carboxyl-terminal tail of human Somatostatin Receptor 1. It can be used to detect total SST1 receptors in Western blots independent of phosphorylation. The SST1...
$ 375.00 *
Details
Citations
KO-Validated
CXCR4 (IHC-grade), CXC Chemokine Receptor 4 Antibody
CXCR4 (IHC-grade), CXC Chemokine Receptor 4...
The CXCR4 receptor antibody is directed against the distal end of the carboxyl-terminal tail of mouse, rat and human CXCR4. It can be used to detect CXCR4 receptors in Western blots in a phosphorylation-sensitive manner. After agonist...
$ 375.00 *
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ETA (IHC-grade), Endothelin Receptor A Antibody
ETA (IHC-grade), Endothelin Receptor A Antibody
The ETA receptor antibody is directed against the distal end of the carboxyl-terminal tail of mouse, rat and human endothelin receptor A. It can be used to detect ETA receptors in Western blots in a phosphorylation-sensitive manner...
$ 375.00 *
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ETA (non-phospho-Endothelin Receptor A Antibody)
ETA (non-phospho-Endothelin Receptor A Antibody)
The ETA receptor antibody is directed against the distal end of the carboxyl-terminal tail of mouse, rat and human endothelin receptor A. It can be used to detect ETA receptors in Western blots in a phosphorylation-sensitive manner...
$ 375.00 *
Details
Citations
KO-Validated
CXCR4 (non-phospho), CXC Chemokine Receptor 4 Antibody
CXCR4 (non-phospho), CXC Chemokine Receptor 4...
The non-phospho-CXCR4 receptor antibody is directed against the distal end of the carboxyl-terminal tail of mouse, rat and human CXCR4. It can be used to detect CXCR4 receptors in Western blots in a phosphorylation-sensitive manner....
$ 375.00 *
Details
Citations
KO-Validated
SST2 (IHC-grade), Somatostatin Receptor 2 Antibody
SST2 (IHC-grade), Somatostatin Receptor 2 Antibody
The SST2 receptor antibody is directed against the distal end of the carboxyl-terminal tail of mouse, rat and human Somatostatin Receptor 2. It detects selectively the canonical form of SST2 (also referred to as SST2A) and not the...
$ 375.00 *
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Immunohistochemical identification of S1P1 Receptor in liver
S1P1 (GP-IHC-grade), Sphingosine 1-Phosphate...
The non-phospho-S1P1 receptor antibody is directed against the distal end of the carboxyl-terminal tail of human S1P1. It also detects S1P1 in cultured cells and tissue sections by immunohistochemistry. It can be used to detect total...
$ 375.00 *
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Immunohistochemical identification of Glucagon-Like Peptide 1 Receptor in pancreas
GLP1 (IHC-grade), Glucagon-Like Peptide 1...
The GLP1 receptor antibody is directed against the distal end of the carboxyl-terminal tail of human GLP1 Receptor. The GLP1 antibody can be used to isolate and enrich GLP1 receptors from cell and tissue lysates. It also detects GLP1 in...
$ 375.00 *
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Validation of the S1P1 Receptor in transfected HEK293 cells
S1P1 (non-phospho), Sphingosine 1-Phosphate...
The non-phospho-S1P1 receptor antibody is directed against the distal end of the carboxyl-terminal tail of human S1P1. It also detects S1P1 in cultured cells and tissue sections by immunohistochemistry. It can be used to detect total...
$ 375.00 *
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NEW
Validation of the GPR75 Receptor in transfected HEK293 cells.
GPR75 (non-phospho), G protein-coupled...
The non-phospho-GPR75 receptor antibody is directed against the distal end of the carboxyl-terminal tail of human GPR75. It can be used to detect total GPR75 receptors in Western blots independent of phosphorylation. The GPR75 antibody...
$ 375.00 *
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NEW
Validation of the M4 Muscarinic Acetylcholine Receptor in transfected HEK293 cells
M4 (non-phospho-M4 Muscarinic Acetylcholine...
The non-phospho-M4 receptor antibody is directed against the 3rd loop of human M4 Muscarinic Acetylcholine Receptor (M4). It can be used to detect total M4 receptors in Western blots independent of phosphorylation. The non-phospho-M4...
$ 375.00 *
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NEW
Immunohistochemical identification of M1 Muscarinic Acetylcholine Receptor in hippocampus
M1 (IHC-grade), M1 Muscarinic Acetylcholine...
The non-phospho-M1 receptor antibody is directed against the 3rd loop of human M1 Muscarinic Acetylcholine Receptor (M1). It can be used to detect total M1 receptors in Western blots independent of phosphorylation. The non-phospho-M1...
$ 375.00 *
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NEW
Validation of the Corticotropin-Releasing Factor Receptor 1 in transfected HEK293 cells
CRF1 (non-phospho-Corticotropin-Releasing...
The non-phospho-CRF1 receptor antibody is directed against the distal part of the carboxyl-terminal tail of human CRF1. It can be used to detect total CRF1 receptors in Western blots independent of phosphorylation. The non-phospho-CRF1...
$ 375.00 *
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26 From 38

For further reading refer to:

Kliewer A, Reinscheid RK, Schulz S. Emerging Paradigms of G Protein-Coupled Receptor Dephosphorylation. Trends Pharmacol Sci. 2017 Jul;38(7):621-636. doi:10.1016/j.tips.2017.04.002. Epub 2017 May 4. Review. PubMed PMID: 28478994.

Miess E, Gondin AB, Yousuf A, Steinborn R, Mösslein N, Yang Y, Göldner M, Ruland JG, Bünemann M, Krasel C, Christie MJ, Halls ML, Schulz S, Canals M. Multisite phosphorylation is required for sustained interaction with GRKs and arrestins during rapid μ-opioid receptor desensitization. Sci Signal. 2018 Jul 17;11(539). pii: eaas9609. doi: 10.1126/scisignal.aas9609. PubMed PMID: 30018083.

Kliewer A, Schmiedel F, Sianati S, Bailey A, Bateman JT, Levitt ES, Williams JT, Christie MJ, Schulz S. Phosphorylation-deficient G-protein-biased μ-opioid receptors improve analgesia and diminish tolerance but worsen opioid side effects. Nat Commun. 2019 Jan 21;10(1):367. doi: 10.1038/s41467-018-08162-1. PubMed PMID: 30664663; PubMed Central PMCID: PMC6341117.

Mann A, Moulédous L, Froment C, O'Neill PR, Dasgupta P, Günther T, Brunori G, Kieffer BL, Toll L, Bruchas MR, Zaveri NT, Schulz S. Agonist-selective NOP receptor phosphorylation correlates in vitro and in vivo and reveals differential post-activation signaling by chemically diverse agonists. Sci Signal. 2019 Mar 26;12(574). pii: eaau8072. doi: 10.1126/scisignal.aau8072. PubMed PMID: 30914485; PubMed Central PMCID: PMC6934085.

Saaber F, Schütz D, Miess E, Abe P, Desikan S, Ashok Kumar P, Balk S, Huang K, Beaulieu JM, Schulz S, Stumm R. ACKR3 Regulation of Neuronal Migration Requires ACKR3 Phosphorylation, but Not β-Arrestin. Cell Rep. 2019 Feb 5;26(6):1473-1488.e9. doi: 10.1016/j.celrep.2019.01.049. PubMed PMID: 30726732.

Glück L, Loktev A, Moulédous L, Mollereau C, Law PY, Schulz S. Loss of morphine reward and dependence in mice lacking G protein-coupled receptor kinase 5. Biol Psychiatry. 2014 Nov 15;76(10):767-74. doi: 10.1016/j.biopsych.2014.01.021. Epub 2014 Feb 3. PubMed PMID: 24629717; PubMed Central PMCID: PMC4119866.

For further reading refer to: Kliewer A, Reinscheid RK, Schulz S. Emerging Paradigms of G Protein-Coupled Receptor Dephosphorylation. Trends Pharmacol Sci. 2017 Jul;38(7):621-636.... read more »
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Premium Phosphosite-Specific 7TM Antibodies

For further reading refer to:

Kliewer A, Reinscheid RK, Schulz S. Emerging Paradigms of G Protein-Coupled Receptor Dephosphorylation. Trends Pharmacol Sci. 2017 Jul;38(7):621-636. doi:10.1016/j.tips.2017.04.002. Epub 2017 May 4. Review. PubMed PMID: 28478994.

Miess E, Gondin AB, Yousuf A, Steinborn R, Mösslein N, Yang Y, Göldner M, Ruland JG, Bünemann M, Krasel C, Christie MJ, Halls ML, Schulz S, Canals M. Multisite phosphorylation is required for sustained interaction with GRKs and arrestins during rapid μ-opioid receptor desensitization. Sci Signal. 2018 Jul 17;11(539). pii: eaas9609. doi: 10.1126/scisignal.aas9609. PubMed PMID: 30018083.

Kliewer A, Schmiedel F, Sianati S, Bailey A, Bateman JT, Levitt ES, Williams JT, Christie MJ, Schulz S. Phosphorylation-deficient G-protein-biased μ-opioid receptors improve analgesia and diminish tolerance but worsen opioid side effects. Nat Commun. 2019 Jan 21;10(1):367. doi: 10.1038/s41467-018-08162-1. PubMed PMID: 30664663; PubMed Central PMCID: PMC6341117.

Mann A, Moulédous L, Froment C, O'Neill PR, Dasgupta P, Günther T, Brunori G, Kieffer BL, Toll L, Bruchas MR, Zaveri NT, Schulz S. Agonist-selective NOP receptor phosphorylation correlates in vitro and in vivo and reveals differential post-activation signaling by chemically diverse agonists. Sci Signal. 2019 Mar 26;12(574). pii: eaau8072. doi: 10.1126/scisignal.aau8072. PubMed PMID: 30914485; PubMed Central PMCID: PMC6934085.

Saaber F, Schütz D, Miess E, Abe P, Desikan S, Ashok Kumar P, Balk S, Huang K, Beaulieu JM, Schulz S, Stumm R. ACKR3 Regulation of Neuronal Migration Requires ACKR3 Phosphorylation, but Not β-Arrestin. Cell Rep. 2019 Feb 5;26(6):1473-1488.e9. doi: 10.1016/j.celrep.2019.01.049. PubMed PMID: 30726732.

Glück L, Loktev A, Moulédous L, Mollereau C, Law PY, Schulz S. Loss of morphine reward and dependence in mice lacking G protein-coupled receptor kinase 5. Biol Psychiatry. 2014 Nov 15;76(10):767-74. doi: 10.1016/j.biopsych.2014.01.021. Epub 2014 Feb 3. PubMed PMID: 24629717; PubMed Central PMCID: PMC4119866.

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