The ‘allosteric modulator’ SCH‐202676 disrupts G protein‐coupled receptor function via sulphydryl‐sensitive mechanisms
Open accessAbstract
1. Previous studies suggest that the thiadiazole compound SCH-202676 (N-(2,3-diphenyl-1,2,4-thiadiazol-5-(2H)-ylidene)methanamine) acts as an allosteric modulator of a variety of structurally distinct G protein-coupled receptors (GPCRs). It was postulated that SCH-202676 would directly bind a structural motif in the receptor molecule common to divergent members of the GPCR family. The molecular mechanisms of such a promiscuous action, however, remain obscure. 2. To clarify the mechanism of SCH-202676 action, we used the functional approach of [35S]GTPgammaS autoradiography with rat brain cryostat sections together with classical membrane [35S]GTPgammaS binding assays to evaluate how the thiadiazole affects G protein activity mediated by various receptors linked to the Gi-family of G proteins. 3. We found that in the absence of dithiotreitol (DTT), SCH-202676 (10(-7)-10(-5) M) elicits nonspecific effects in the [35S]GTPgammaS-based G protein activation assays, thereby severely compromising interpretations on the compounds ability to allosterically inhibit receptor-mediated G protein activity. Such a nonspecific behaviour was fully reversed upon addition of DTT (1 mM), revealing thiol-based mechanism of action. 4. In routine incubations containing DTT, SCH-202676 had no effect on receptor-driven G protein activity, as assessed for adenosine A1, alpha2-adrenergic, cannabinoid CB1, lysophosphatidic acid LPA1, muscarinic M2/M4, purinergic P2Y12 or sphingosine 1-phosphate receptors, suggesting that the thiadiazole does not act as an allosteric modulator of GPCR function. 5. 1H NMR analysis indicated that SCH-202676 underwent structural changes after incubation with the reducing agent DTT or with brain tissue. 6. We conclude that SCH-202676 modulates GPCRs via thiol modification rather than via true allosteric mechanisms.
The claims and statistics of this paper haven’t been checked yet.
Run the check — free, no account needed. It reads the open-access text and checks the sources it cites.
Integrity signals
Registry
Cites
Statistics
Claims the paper makes
The claims and statistics of this paper haven’t been checked yet.
Run the check — free, no account needed. It reads the open-access text and checks the sources it cites.
Claims other papers make about this one
Each is checked against this paper’s own text: does it say what the citing paper says it does?
SCH-202676 is a global GPCR inhibitor that blocks agonist and antagonist binding to structurally diverse GPCRs coupling to Gαi/o, Gαs, and Gαq proteins.
“SCH-202676, a global GPCR inhibitor that blocks both agonist and antagonist binding to structurally diverse GPCRs that couple to Gαi/o, Gαs and Gαq proteins (Fawzi et al., 2001; Lewandowicz et al., 2006).”
From A Cardiovascular Disease-Linked Gut Microbial Metabolite Acts via Adrenergic Receptors (2020) · cites this paper as Lewandowicz et al., 2006
Self-check
Percentages, sums and reported differences re-computed from the paper’s own numbers.
The self-check needs the paper’s full text.
Cites
P2Y12, a New Platelet ADP Receptor, Target of Clopidogrel
Savi, P., Labouret, C., Delesque, N., Guette, F., Lupker, J. H., & Herbert, J. (2001) · Biochemical and Biophysical Research Communications · doi:10.1006/bbrc.2001.4816 · Cited by 272 · see citing works
Ding, Z., Kim, S., Dorsam, R. T., Jin, J., & Kunapuli, S. P. (2003) · Blood · doi:10.1182/blood-2002-10-3027 · Cited by 207 · see citing works
Mills, D. C. B. (1996) · Thrombosis and Haemostasis · doi:10.1055/s-0038-1650674 · Cited by 153 · see citing works
Savinainen, J. R., Saario, S. M., Niemi, R., Järvinen, T., & Laitinen, J. T. (2003) · British Journal of Pharmacology · doi:10.1038/sj.bjp.0705577 · Cited by 110 · see citing works
Self-citationMacfarlane, D. E., Srivastava, P. C., & Mills, D. C. B. (1983) · Journal of Clinical Investigation · doi:10.1172/jci110786 · Cited by 106 · see citing works
van den Nieuwendijk, A. M. C. H., Pietra, D., Heitman, L. H., Göblyös, A., & IJzerman, A. P. (2004) · Journal of Medicinal Chemistry · doi:10.1021/jm030863d · Cited by 84 · see citing works
Fawzi, A. B., Macdonald, D., Benbow, L. L., Smith-Torhan, A., Zhang, H., Weig, B. C., Ho, G., Tulshian, D., Linder, M. E., & Graziano, M. P. (2001) · Molecular Pharmacology · doi:10.1016/s0026-895x(24)12353-x · Cited by 82 · see citing works
Allosteric Modulators: The New Generation of Receptor Antagonist
Kenakin, T. P. (2004) · Molecular Interventions · doi:10.1124/mi.4.4.6 · Cited by 70 · see citing works
Kokkola, T., Savinainen, J. R., Mönkkönen, K., Retamal, M. D., & Laitinen, J. T. (2005) · BMC Cell Biology · doi:10.1186/1471-2121-6-21 · Cited by 52 · see citing works
Self-citationGöblyös, A., de Vries, H., Brussee, J., & IJzerman, A. P. (2005) · Journal of Medicinal Chemistry · doi:10.1021/jm049337s · Cited by 49 · see citing works
Laitinen, J. T. (1999) · Neuroscience · doi:10.1016/s0306-4522(98)00571-5 · Cited by 49 · see citing works
Self-citationLanzafame, A. A., & Christopoulos, A. (2004) · Journal of Pharmacology and Experimental Therapeutics · doi:10.1124/jpet.103.060590 · Cited by 49 · see citing works
Laitinen, J. T., Uri, A., Raidaru, G., & Miettinen, R. A. (2001) · Journal of Neurochemistry · doi:10.1046/j.1471-4159.2001.00265.x · Cited by 40 · see citing works
Self-citationWaeber, C., & Chiu, M. L. (1999) · Journal of Neurochemistry · doi:10.1046/j.1471-4159.1999.0731212.x · Cited by 40 · see citing works
Kurkinen, K. M. A., Koıstınaho, J., & Laitinen, J. T. (1997) · Brain Research · doi:10.1016/s0006-8993(97)00663-x · Cited by 33 · see citing works
Self-citationAgonist-stimulated [35S]GTPγS autoradiography: optimization for high sensitivity
Happe, H. K., Bylund, D. B., & Murrin, L. C. (2001) · European Journal of Pharmacology · doi:10.1016/s0014-2999(01)01043-3 · Cited by 33 · see citing works
Effects of the allosteric modulator SCH-202676 on adenosine and P2Y receptors
Gao, Z., Gross, A. S., & Jacobson, K. A. (2004) · Life Sciences · doi:10.1016/j.lfs.2003.11.014 · Cited by 26 · see citing works
Vasiljev, K. S. (2003) · Neuropharmacology · doi:10.1016/s0028-3908(03)00142-4 · Cited by 23 · see citing works
Laitinen, J. T. (2004) · Current Neuropharmacology · doi:10.2174/1570159043476819 · Cited by 19 · see citing works
Self-citation
Flagged first, then by citations
Cited by
Sorted by citations
A Cardiovascular Disease-Linked Gut Microbial Metabolite Acts via Adrenergic Receptors
Nemet, I., Saha, P. P., Gupta, N., Zhu, W., Romano, K. A., Skye, S. M., Cajka, T., Mohan, M. L., Li, L., Wu, Y., et al. (2020) · Cell · doi:10.1016/j.cell.2020.02.016 · Cited by 784 · see citing works
Dahlin, J. L., Nissink, J. W. M., Strasser, J. M., Francis, S., Higgins, L., Zhou, H., Zhang, Z., & Walters, M. A. (2015) · Journal of Medicinal Chemistry · doi:10.1021/jm5019093 · Cited by 362 · see citing works
Allostery at opioid receptors: modulation with small molecule ligands
Livingston, K. E., & Traynor, J. R. (2017) · British Journal of Pharmacology · doi:10.1111/bph.13823 · Cited by 133 · see citing works
Modulating G-protein-coupled receptors: from traditional pharmacology to allosterics
Gilchrist, A. (2007) · Trends in Pharmacological Sciences · doi:10.1016/j.tips.2007.06.012 · Cited by 65 · see citing works
Identification of an antithrombotic allosteric modulator that acts through helix 8 of PAR1
Dowal, L. M., Sim, D., Dilks, J. R., Blair, P. S., Beaudry, S., Denker, B. M., Κούκος, Γ., Kuliopulos, A., & Flaumenhaft, R. C. (2011) · Proceedings of the National Academy of Sciences · doi:10.1073/pnas.1014863108 · Cited by 62 · see citing works
Foley, T. L., Rai, G., Yasgar, A., Daniel, T., Baker, H. L., Attene‐Ramos, M. S., Kosa, N. M., Leister, W., Burkart, M. D., Jadhav, A., et al. (2014) · Journal of Medicinal Chemistry · doi:10.1021/jm401752p · Cited by 56 · see citing works
Allosteric Modulation of Purine and Pyrimidine Receptors
Jacobson, K. A., Gao, Z., Göblyös, A., & IJzerman, A. P. (2011) · Advances in pharmacology · doi:10.1016/b978-0-12-385526-8.00007-2 · Cited by 39 · see citing works
A strategy to discover inhibitors of Bacillus subtilis surfactin-type phosphopantetheinyltransferase
Yasgar, A., Foley, T. L., Jadhav, A., Inglese, J., Burkart, M. D., & Simeonov, A. M. (2009) · Molecular BioSystems · doi:10.1039/b913291k · Cited by 35 · see citing works
Chen, X., Xia, Z., & Storm, D. R. (2012) · Journal of Neuroscience · doi:10.1523/jneurosci.2180-12.2012 · Cited by 34 · see citing works
Rebbeck, R. T., Singh, D. P., Janicek, K. A., Bers, D. M., Thomas, D. D., Launikonis, B. S., & Cornea, R. L. (2020) · Scientific Reports · doi:10.1038/s41598-020-58461-1 · Cited by 34 · see citing works
Synthesis of 1,2,4‐Thiadiazoles by Oxidative Dimerization of Carbothioamides by Using Oxone
Yoshimura, A., Todora, A. D., Kastern, B. J., Koski, S. R., & Zhdankin, V. V. (2014) · European Journal of Organic Chemistry · doi:10.1002/ejoc.201402756 · Cited by 32 · see citing works
MORSHED, S. A., Ma, R., Latif, R., & Davies, T. F. (2018) · Science Signaling · doi:10.1126/scisignal.aah4120 · Cited by 32 · see citing works
Fasciani, I., Petragnano, F., Aloisi, G., Marampon, F., Carli, M., Scarselli, M., Maggio, R., & Rossi, M. (2020) · Pharmaceuticals · doi:10.3390/ph13110388 · Cited by 26 · see citing works
Predator cues target signaling pathways in toxic algal metabolome
Brown, E. R., Moore, S. G., Gaul, D. A., & Kubanek, J. (2022) · Limnology and Oceanography · doi:10.1002/lno.12069 · Cited by 22 · see citing works
Paillamanque, J., Tusie, A. A. S., Carmona, E. M., Treviño, C. L., Sandoval, C., Nualart, F., Osses, N., & Reyes, J. G. (2017) · PLoS ONE · doi:10.1371/journal.pone.0172128 · Cited by 17 · see citing works
Recent breakthroughs in synthetic small molecules targeting SARS-CoV-2 Mpro from 2022 to 2024
Braconi, L., Sosic, A., & Crocetti, L. (2025) · Bioorganic & Medicinal Chemistry · doi:10.1016/j.bmc.2025.118247 · Cited by 16 · see citing works
A Tyrosine Residue on the TSH Receptor Stabilizes Multimer Formation
Latif, R., Michałek, K., MORSHED, S. A., & Davies, T. F. (2010) · PLoS ONE · doi:10.1371/journal.pone.0009449 · Cited by 16 · see citing works
Ren, P., Yu, C., Zhang, R., Nie, T., Hu, Q., Li, H., Zhang, X., Zhang, X., Li, S., Liu, L., et al. (2023) · European Journal of Medicinal Chemistry · doi:10.1016/j.ejmech.2023.115129 · Cited by 15 · see citing works
Filizola, M. (2018) · Neuroscience Letters · doi:10.1016/j.neulet.2018.02.037 · Cited by 11 · see citing works
Singha, P., Mäklin, K., Vihavainen, T., Laitinen, T., Nevalainen, T., Patil, M. R., Tonduru, A. K., Poso, A., Laitinen, J. T., & Savinainen, J. R. (2020) · European Journal of Pharmaceutical Sciences · doi:10.1016/j.ejps.2020.105321 · Cited by 11 · see citing works
Self-citationAlzugaray, M. E., Gavazzi, M. V., & Ronderos, J. R. (2020) · General and Comparative Endocrinology · doi:10.1016/j.ygcen.2020.113637 · Cited by 10 · see citing works
Król, W., Machelak, W., & Zielińska, M. (2024) · Biochemical Pharmacology · doi:10.1016/j.bcp.2024.116686 · Cited by 9 · see citing works
A perspective on more effective GPCR-targeted drug discovery efforts
Gilchrist, A. (2008) · Expert Opinion on Drug Discovery · doi:10.1517/17460441.3.4.375 · Cited by 9 · see citing works
Luo, Y., Liu, X., Ma, R., Wang, Y., Zimering, M. B., & Pan, Z. (2020) · iScience · doi:10.1016/j.isci.2020.101036 · Cited by 6 · see citing works
Gavazzi, M. V., Ronderos, J. R., & Alzugaray, M. E. (2023) · Canadian Journal of Zoology · doi:10.1139/cjz-2023-0114 · Cited by 4 · see citing works
Aspirin inhibits human bradykinin B2 receptor ligand binding function
Gardes, J., Michineau, S., Pizard, A., Alhenc‐Gelas, F., & Rajerison, R. M. (2008) · Biochemical Pharmacology · doi:10.1016/j.bcp.2008.02.001 · Cited by 4 · see citing works
Sambucaro, M. J. V., Alzugaray, M. E., & Ronderos, J. R. (2024) · Journal of Experimental Biology · doi:10.1242/jeb.247801 · Cited by 2 · see citing works
Allosteric Modulation of the Mu Opioid Receptor.
Livingston, K. E. (2016) · Deep Blue (University of Michigan)
Manipulating posttranslational modification in natural product biosynthesis
Foley, T. L. (2010) · eScholarship (California Digital Library)
Yin, Y., Luo, L.-Z., Li, L., Hu, Z., Chen, Y.-C., Ma, J., Yu, Y., Wang, H., & Zhang, W. (2024) · Phytopathology · doi:10.1094/phyto-04-24-0113-r
Signalling Pathway Associated to Discharge of Cnidocyst Induced by Reduced Glutathione in HydraPreprint
GAVAZZI, M. V., Ronderos, J. R., & Alzugaray, M. E. (2023) · Research Square · doi:10.21203/rs.3.rs-3015567/v1
Gavazzi, M. V., Ronderos, J. R., & Alzugaray, M. E. (2026) · Research Square · doi:10.21203/rs.3.rs-10449604/v1
Development of a Continuous Fluorescence-Based Assay for Methyltransferase-like Protein 9Preprint
Kothari, M., Kaushal, A., Roy, A., & Iyamu, I. D. (2026) · ChemRxiv · doi:10.26434/chemrxiv.15007467/v1
- Authors
- Lewandowicz, A. M., Vepsäläinen, J., & Laitinen, J. T.
- Affiliations
- University of Eastern Finland (FI)
- Corresponding author
- Laitinen, Jarmo T
- Venue
- British Journal of Pharmacology
- Publisher
- Wiley
- Published
- 2006-02
- Volume
- 147
- Issue
- 4
- Pages
- 422-429
- ISSN
- 0007-1188 (ISSN-L)
- 1476-5381
- PMC
- PMC1616996
- OpenAlex
- W1964952712
- Cited by
- 34
- References
- 19
- Citations by year
- 2026: 1 · 2025: 1 · 2024: 4 · 2023: 4 · 2022: 1 · 2020: 6 · 2018: 2 · 2017: 2 · 2016: 1 · 2015: 1 · 2014: 2 · 2012: 1
- FWCI
- 0.54
- Type
- journal article
- Language
- en
- Open access
- bronze
- doi.org
- Locations
- British Journal of Pharmacology (publishedVersion)
- PubMed Central (publishedVersion)
- PubMed (publishedVersion)
- Topics
- Life Sciences › Biochemistry, Genetics and Molecular Biology › Molecular Biology › Receptor Mechanisms and Signaling
- Life Sciences › Neuroscience › Cellular and Molecular Neuroscience › Neuroscience and Neuropharmacology Research
- Life Sciences › Biochemistry, Genetics and Molecular Biology › Molecular Biology › Protein Kinase Regulation and GTPase Signaling
- Keywords
- thiadiazoles, G protein-coupled receptors, allosteric modulators, thiol modification, dithiothreitol, Gi protein, G protein activation, adenosine A1 receptor, alpha2-adrenoceptors, CB1 receptor, sphingosine-1-phosphate receptor
- MeSH terms
- Allosteric Regulation, Animals, Autoradiography, Brain Chemistry, Cell Membrane, Male, Radioligand Assay, Thiadiazoles, Thiazoles, Guanosine 5'-O-(3-Thiotriphosphate), Rats, Wistar, Nuclear Magnetic Resonance, Biomolecular, Receptors, G-Protein-Coupled, Rats
About these checks
Registry, retraction, Cites and statistics results are computed, not judged, with one exception: a printed reference that no index lists is read once by a model before it counts as a citation error. Claims are extracted by a model and kept only when their quote appears verbatim in the text; each cited source is then checked, with a model’s help, for whether it says what the claim relies on. Those verdicts can be wrong — read the claim’s quote and the cited source before relying on one.
Statistics and arithmetic are recomputed, not judged.
Confidence bands are shown only for fields calibrated on our annotated test set. None is calibrated yet, so no band is shown.
What counts as a claim ›How we measure confidence ›How we check this ›
Are you an author, or do you see a problem with this page? Request a review