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Proton dissociation properties of arylphosphonates: Determination of accurate Hammett equation parameters. J Pharm Biomed Anal 2017; 143:101-109. [PMID: 28578253 DOI: 10.1016/j.jpba.2017.05.038] [Citation(s) in RCA: 7] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/07/2017] [Revised: 05/19/2017] [Accepted: 05/21/2017] [Indexed: 11/23/2022]
Abstract
Determination of the proton dissociation constants of several arylphosphonic acid derivatives was carried out to investigate the accuracy of the Hammett equations available for this family of compounds. For the measurement of the pKa values modern, accurate methods, such as the differential potentiometric titration and NMR-pH titration were used. We found our results significantly different from the pKa values reported before (pKa1: MAE = 0.16 pKa2: MAE=0.59). Based on our recently measured pKa values, refined Hammett equations were determined that might be used for predicting highly accurate ionization constants of newly synthesized compounds (pKa1=1.70-0.894σ, pKa2=6.92-0.934σ).
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2
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Noguchi T, Ishiba H, Honda K, Kondoh Y, Osada H, Ohno H, Fujii N, Oishi S. Synthesis of Grb2 SH2 Domain Proteins for Mirror-Image Screening Systems. Bioconjug Chem 2017; 28:609-619. [DOI: 10.1021/acs.bioconjchem.6b00692] [Citation(s) in RCA: 9] [Impact Index Per Article: 1.3] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/29/2022]
Affiliation(s)
- Taro Noguchi
- Graduate
School of Pharmaceutical Sciences, Kyoto University, Sakyo-ku, Kyoto 606-8501, Japan
| | - Hiroyuki Ishiba
- Graduate
School of Pharmaceutical Sciences, Kyoto University, Sakyo-ku, Kyoto 606-8501, Japan
| | - Kaori Honda
- Chemical
Biology Research Group, RIKEN Center for Sustainable Resource Science, Wako, Saitama 351-0198, Japan
| | - Yasumitsu Kondoh
- Chemical
Biology Research Group, RIKEN Center for Sustainable Resource Science, Wako, Saitama 351-0198, Japan
| | - Hiroyuki Osada
- Chemical
Biology Research Group, RIKEN Center for Sustainable Resource Science, Wako, Saitama 351-0198, Japan
| | - Hiroaki Ohno
- Graduate
School of Pharmaceutical Sciences, Kyoto University, Sakyo-ku, Kyoto 606-8501, Japan
| | - Nobutaka Fujii
- Graduate
School of Pharmaceutical Sciences, Kyoto University, Sakyo-ku, Kyoto 606-8501, Japan
| | - Shinya Oishi
- Graduate
School of Pharmaceutical Sciences, Kyoto University, Sakyo-ku, Kyoto 606-8501, Japan
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Boufas W, Cheloufi H, Bouchareb F, Berredjem M, Aouf NE. Convenient Synthesis of Novel N-Acylsulfonamides Containing Phosphonate Moiety. PHOSPHORUS SULFUR 2014. [DOI: 10.1080/10426507.2014.931398] [Citation(s) in RCA: 7] [Impact Index Per Article: 0.7] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/25/2022]
Affiliation(s)
- Wahida Boufas
- Laboratory of Applied Organic Chemistry, Synthesis of Biomolecules and Molecular Modelling Group, Badji-Mokhtar. Annaba University, Box 12, 23000 Annaba, Algeria
| | - Hadjer Cheloufi
- Laboratory of Applied Organic Chemistry, Synthesis of Biomolecules and Molecular Modelling Group, Badji-Mokhtar. Annaba University, Box 12, 23000 Annaba, Algeria
| | - Fouzia Bouchareb
- Laboratory of Applied Organic Chemistry, Synthesis of Biomolecules and Molecular Modelling Group, Badji-Mokhtar. Annaba University, Box 12, 23000 Annaba, Algeria
| | - Malika Berredjem
- Laboratory of Applied Organic Chemistry, Synthesis of Biomolecules and Molecular Modelling Group, Badji-Mokhtar. Annaba University, Box 12, 23000 Annaba, Algeria
| | - Nour-Eddine Aouf
- Laboratory of Applied Organic Chemistry, Synthesis of Biomolecules and Molecular Modelling Group, Badji-Mokhtar. Annaba University, Box 12, 23000 Annaba, Algeria
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4
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Hessainia S, Berredjem M, Ouarna S, Cheraiet Z, Aouf NE. Efficient Synthesis of Modified Sulfamides and Cyclosulfamides Containing Phosphonate Moieties. PHOSPHORUS SULFUR 2013. [DOI: 10.1080/10426507.2012.700356] [Citation(s) in RCA: 8] [Impact Index Per Article: 0.7] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/26/2022]
Affiliation(s)
- Sihem Hessainia
- a Laboratory of Applied Organic Chemistry , Badji-Mokhtar Annaba University , BP 12 El-Hadjar, Annaba , Algeria
| | - Malika Berredjem
- a Laboratory of Applied Organic Chemistry , Badji-Mokhtar Annaba University , BP 12 El-Hadjar, Annaba , Algeria
| | - Souad Ouarna
- a Laboratory of Applied Organic Chemistry , Badji-Mokhtar Annaba University , BP 12 El-Hadjar, Annaba , Algeria
| | - Zinelaabidine Cheraiet
- a Laboratory of Applied Organic Chemistry , Badji-Mokhtar Annaba University , BP 12 El-Hadjar, Annaba , Algeria
| | - Nour-Eddine Aouf
- a Laboratory of Applied Organic Chemistry , Badji-Mokhtar Annaba University , BP 12 El-Hadjar, Annaba , Algeria
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5
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Kraskouskaya D, Duodu E, Arpin CC, Gunning PT. Progress towards the development of SH2 domain inhibitors. Chem Soc Rev 2013; 42:3337-70. [DOI: 10.1039/c3cs35449k] [Citation(s) in RCA: 83] [Impact Index Per Article: 7.5] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/10/2023]
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6
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Tverdomed SN, Kolanowski J, Lork E, Röschenthaler GV. An effective synthetic route to ortho-difluoromethyl arylphosphosphonates: studies on the reactivity of phosphorus- and fluorine-containing functions. Tetrahedron 2011. [DOI: 10.1016/j.tet.2011.03.076] [Citation(s) in RCA: 17] [Impact Index Per Article: 1.3] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/18/2022]
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7
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Ambaye ND, Gunzburg MJ, Lim RCC, Price JT, Wilce MCJ, Wilce JA. Benzopyrazine derivatives: A novel class of growth factor receptor bound protein 7 antagonists. Bioorg Med Chem 2010; 19:693-701. [PMID: 21134757 DOI: 10.1016/j.bmc.2010.10.030] [Citation(s) in RCA: 17] [Impact Index Per Article: 1.2] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/30/2010] [Revised: 10/08/2010] [Accepted: 10/12/2010] [Indexed: 11/15/2022]
Abstract
Growth factor receptor bound protein 7 (Grb7) is an adapter protein that functions as a downstream effector of growth factor mediated signal transduction. Over-expression of Grb7 has been implicated in a variety of cancers such as breast, blood, pancreatic, esophageal, and gastric carcinomas. Inhibition of Grb7 has been shown to reduce the migratory and proliferative potential of these cancers, making it an attractive therapeutic target. Starting with a known peptide antagonist, the present work reports the application of a succession of computational ligand design tools comprising a ligand shape based similarity search, molecular docking and a 2D-similarity search to identify small molecular antagonists of the Grb7-SH2 domain from the NCI chemical database. Binding to the Grb7-SH2 domain was then experimentally tested using melting point shift assays and isothermal titration calorimetry. Overall, a total of 11 benzopyrazine based small molecular antagonists were identified with affinity for the Grb7-SH2 domain. Representative compounds tested using ITC were revealed to possess moderate binding affinity in the low micromolar range. Finally, the lead compound (NSC642056) was found to reduce the growth of a Grb7-expressing breast cancer cell line with an IC(50) of 86μM. It is expected that the identified antagonists will be useful additions to further explore the function of Grb7 and for the development of inhibitors with therapeutic potential.
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Affiliation(s)
- Nigus D Ambaye
- Department of Biochemistry and Molecular Biology, Monash University, Wellington Road, Victoria 3800, Australia
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8
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Haan C, Behrmann I, Haan S. Perspectives for the use of structural information and chemical genetics to develop inhibitors of Janus kinases. J Cell Mol Med 2010; 14:504-27. [PMID: 20132407 PMCID: PMC3823453 DOI: 10.1111/j.1582-4934.2010.01018.x] [Citation(s) in RCA: 36] [Impact Index Per Article: 2.6] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 02/06/2023] Open
Abstract
Gain-of-function mutations in the genes encoding Janus kinases have been discovered in various haematologic diseases. Jaks are composed of a FERM domain, an SH2 domain, a pseudokinase domain and a kinase domain, and a complex interplay of the Jak domains is involved in regulation of catalytic activity and association to cytokine receptors. Most activating mutations are found in the pseudokinase domain. Here we present recently discovered mutations in the context of our structural models of the respective domains. We describe two structural hotspots in the pseudokinase domain of Jak2 that seem to be associated either to myeloproliferation or to lymphoblastic leukaemia, pointing at the involvement of distinct signalling complexes in these disease settings. The different domains of Jaks are discussed as potential drug targets. We present currently available inhibitors targeting Jaks and indicate structural differences in the kinase domains of the different Jaks that may be exploited in the development of specific inhibitors. Moreover, we discuss recent chemical genetic approaches which can be applied to Jaks to better understand the role of these kinases in their biological settings and as drug targets.
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Affiliation(s)
- Claude Haan
- Life Sciences Research Unit, University of Luxembourg, 162A, av. de la Faïencerie, 1511 Luxembourg, Luxembourg.
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10
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Monga V, Meena CL, Kaur N, Kumar S, Pawar C, Sharma SS, Jain R. Facile synthesis ofN-α-boc-1,2-dialkyl-l-histidines: Utility in the synthesis of thyrotropin-releasing hormone (trh) analogs and evaluation of the cns activity. J Heterocycl Chem 2008. [DOI: 10.1002/jhet.5570450608] [Citation(s) in RCA: 9] [Impact Index Per Article: 0.6] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/11/2022]
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11
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Tverdomed SN, Röschenthaler GV, Kalinovich N, Lork E, Dogadina AV, Ionin BI. New α-substituted alkylbenzene- and dialkylbenzene-1,2-diphosphonates: side-chain metalation of tetraethyl 4-methyl- and 4,5-dimethylbenzene-1,2-diphosphonates. Tetrahedron 2008. [DOI: 10.1016/j.tet.2008.03.020] [Citation(s) in RCA: 4] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/15/2022]
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12
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Liu F, Worthy KM, Bindu LK, Fisher RJ, Burke TR. Structural examination of ring-closing metathesis-derived 15-member macrocycles as Grb2 SH2 domain-binding tetrapeptide mimetics. J Org Chem 2007; 72:9635-42. [PMID: 17990895 DOI: 10.1021/jo701831q] [Citation(s) in RCA: 8] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/29/2022]
Abstract
Ring-closing metathesis (RCM) was employed to join carboxy-terminal alkenyl glycine side chains together with vinyl- and allyl-functionality appended to the beta-methylene of amino-terminal phosphotyrosyl (pTyr) mimetics. This required the synthesis of a variety of new pTyr mimetics, including a novel aza-containing analogue. Many of the resulting 15-member macrocyclic tetrapeptide mimetics exhibited low nanomolar Grb2 SH2 domain-binding affinities in spite of the fact that differing ring junction stereochemistries and geometries of the RCM-derived double bond were employed. The finding that significant latitude exists in the structural requirements for ring closure may facilitate the development of therapeutically relevant macrocyle-based Grb2 SH2 domain-binding antagonists. The synthetic approaches used in this study may also find application to peptide mimetics directed at other biological targets.
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Affiliation(s)
- Fa Liu
- Laboratory of Medicinal Chemistry, CCR, NCI, NIH, Frederick, Maryland 21702, USA
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13
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Kang SU, Choi WJ, Oishi S, Lee K, Karki RG, Worthy KM, Bindu LK, Nicklaus MC, Fisher RJ, Burke TR. Examination of Acylated 4-Aminopiperidine-4-carboxylic Acid Residues in the Phosphotyrosyl+1 Position of Grb2 SH2 Domain-Binding Tripeptides. J Med Chem 2007; 50:1978-82. [PMID: 17371004 DOI: 10.1021/jm0614073] [Citation(s) in RCA: 7] [Impact Index Per Article: 0.4] [Reference Citation Analysis] [Abstract] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/30/2022]
Abstract
A 4-aminopiperidine-4-carboxylic acid residue was placed in the pTyr+1 position of a Grb2 SH2 domain-binding peptide to form a general platform, which was then acylated with a variety of groups to yield a library of compounds designed to explore potential binding interactions, with protein features lying below the betaD strand. The highest affinities were obtained using phenylethyl carbamate and phenylbutyrylamide functionalities.
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Affiliation(s)
- Sang-Uk Kang
- Laboratory of Medicinal Chemistry, Center for Cancer Research, National Cancer Institute, National Institutes of Health, Frederick, Maryland 21702-1201, USA
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Choi WJ, Shi ZD, Worthy KM, Bindu L, Karki RG, Nicklaus MC, Fisher RJ, Burke TR. Application of azide-alkyne cycloaddition 'click chemistry' for the synthesis of Grb2 SH2 domain-binding macrocycles. Bioorg Med Chem Lett 2006; 16:5265-9. [PMID: 16908148 PMCID: PMC1624856 DOI: 10.1016/j.bmcl.2006.08.004] [Citation(s) in RCA: 35] [Impact Index Per Article: 1.9] [Reference Citation Analysis] [Abstract] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/31/2006] [Revised: 07/31/2006] [Accepted: 08/01/2006] [Indexed: 11/28/2022]
Abstract
Copper (I) promoted [3+2] Huisgen cycloaddition of azides with terminal alkynes was used to prepare triazole-containing macrocycles based on the Grb2 SH2 domain-binding motif, 'Pmp-Ac(6)c-Asn', where Pmp and Ac(6)c stand for 4-phosphonomethylphenylalanine and 1-aminocyclohexanecarboxylic acid, respectively. When cycloaddition reactions were conducted at 1mM substrate concentrations, cyclization of monomeric units occurred. At 2mM substrate concentrations the predominant products were macrocyclic dimers. In Grb2 SH2 domain-binding assays the monomeric (S)-Pmp-containing macrocycle exhibited a K(d) value of 0.23microM, while the corresponding dimeric macrocycle was found to have greater than 50-fold higher affinity. The open-chain dimer was also found to have affinity equal to the dimeric macrocycle. This work represents the first application of 'click chemistry' to the synthesis of SH2 domain-binding inhibitors and indicates its potential utility.
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Affiliation(s)
- Won Jun Choi
- Laboratory of Medicinal Chemistry, CCR, NCI, NIH, Frederick, MD 21702, USA
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Abstract
We identified 1113 articles (103 reviews, 1010 primary research articles) published in 2005 that describe experiments performed using commercially available optical biosensors. While this number of publications is impressive, we find that the quality of the biosensor work in these articles is often pretty poor. It is a little disappointing that there appears to be only a small set of researchers who know how to properly perform, analyze, and present biosensor data. To help focus the field, we spotlight work published by 10 research groups that exemplify the quality of data one should expect to see from a biosensor experiment. Also, in an effort to raise awareness of the common problems in the biosensor field, we provide side-by-side examples of good and bad data sets from the 2005 literature.
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Affiliation(s)
- Rebecca L Rich
- Center for Biomolecular Interaction Analysis, University of Utah, Salt Lake City, UT 84132, USA
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