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Kojasoy V, Tantillo DJ. Importance of Noncovalent Interactions Involving Sulfur Atoms in Thiopeptide Antibiotics─Glycothiohexide α and Nocathiacin I. J Phys Chem A 2023; 127:2081-2090. [PMID: 36855831 DOI: 10.1021/acs.jpca.2c07600] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 03/02/2023]
Abstract
Noncovalent interactions involving sulfur atoms play essential roles in protein structure and function by significantly contributing to protein stability, folding, and biological activity. Sulfur is a highly polarizable atom that can participate in many types of noncovalent interactions including hydrogen bonding, sulfur-π interactions, and S-lone pair interactions, but the impact of these sulfur-based interactions on molecular recognition and drug design is still often underappreciated. Here, we examine, using quantum chemical calculations, the roles of sulfur-based noncovalent interactions in complex naturally occurring molecules representative of thiopeptide antibiotics: glycothiohexide α and its close structural analogue nocathiacin I. While donor-acceptor orbital interactions make only very small contributions, electrostatic and dispersion contributions are predicted to be significant in many cases. In pursuit of understanding the magnitudes and nature of these noncovalent interactions, we made potential structural modifications that could significantly expand the chemical space of effective thiopeptide antibiotics.
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Affiliation(s)
- Volga Kojasoy
- Department of Chemistry, University of California─Davis, Davis, California 95616, United States
| | - Dean J Tantillo
- Department of Chemistry, University of California─Davis, Davis, California 95616, United States
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2
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Alfonzo E, Hande SM. α-Heteroarylation of Thioethers via Photoredox and Weak Brønsted Base Catalysis. Org Lett 2021; 23:6115-6120. [PMID: 34297584 DOI: 10.1021/acs.orglett.1c02151] [Citation(s) in RCA: 12] [Impact Index Per Article: 4.0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/25/2022]
Abstract
We report the C-H activation of thioethers to α-thio alkyl radicals and their addition to N-methoxyheteroarenium salts for the redox-neutral synthesis of α-heteroaromatic thioethers. Studies are consistent with a two-step activation mechanism, where oxidation of thioethers to sulfide radical cations by a photoredox catalyst is followed by α-C-H deprotonation by a weak Brønsted base catalyst to afford α-thio alkyl radicals. Further, N-methoxyheteroarenium salts play additional roles as a source of methoxyl radical that contributes to α-thio alkyl radical generation and a sacrificial oxidant that regenerates the photoredox catalytic cycle.
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Affiliation(s)
- Edwin Alfonzo
- Medicinal Chemistry, Research and Early Development, Oncology R&D, AstraZeneca, Waltham, Massachusetts 02451, United States
| | - Sudhir M Hande
- Medicinal Chemistry, Research and Early Development, Oncology R&D, AstraZeneca, Waltham, Massachusetts 02451, United States
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3
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A survey of core replacements in indole-based HIV-1 attachment inhibitors. Bioorg Med Chem Lett 2019; 29:1423-1429. [DOI: 10.1016/j.bmcl.2019.03.018] [Citation(s) in RCA: 14] [Impact Index Per Article: 2.8] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/31/2018] [Revised: 01/31/2019] [Accepted: 03/13/2019] [Indexed: 11/18/2022]
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4
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García-Ortiz AL, Domínguez-González R, Romero-Ávila M, Flores-Pérez B, Guillén L, Castro M, Barba-Behrens N. The role of weak interactions in self-assembly of supramolecular associations of benzothiazole derivatives and their coordination compounds. Inorganica Chim Acta 2018. [DOI: 10.1016/j.ica.2017.10.012] [Citation(s) in RCA: 4] [Impact Index Per Article: 0.7] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/26/2022]
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5
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Self-assembly behavior of inconvertible star poly(acrylic acid) conformers based on p-tert-butylthiacalix[4]arene. Macromol Res 2017. [DOI: 10.1007/s13233-017-5102-0] [Citation(s) in RCA: 3] [Impact Index Per Article: 0.4] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/27/2022]
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6
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Jung JH, Oh J, Lim YG, Chang T, Paik HJ. Inconvertible p-tert-butylthiacalix[4]arene-core-star polystyrene conformers. RSC Adv 2016. [DOI: 10.1039/c6ra15410g] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/21/2022] Open
Abstract
Inconvertible star polystyrene conformers were synthesized by ATRP using initiators of different conformations from p-tert-butylthiacalix[4]arene. The influence of spatial structures of the star polystyrene conformers on properties was investigated.
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Affiliation(s)
- Ji-Hye Jung
- Department of Polymer Science and Engineering
- Pusan National University
- Busan
- Korea
- The 4th R&D Institute-2
| | - Joongsuk Oh
- Department of Chemistry and Division of Advanced Materials Science
- Pohang University of Science and Technology (POSTECH)
- Pohang
- Korea
| | - Yeong-Gweon Lim
- The 4th R&D Institute-2
- Agency for Defense Development
- Daejeon
- Korea
| | - Taihyun Chang
- Department of Chemistry and Division of Advanced Materials Science
- Pohang University of Science and Technology (POSTECH)
- Pohang
- Korea
| | - Hyun-jong Paik
- Department of Polymer Science and Engineering
- Pusan National University
- Busan
- Korea
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7
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Beno BR, Yeung KS, Bartberger MD, Pennington LD, Meanwell NA. A Survey of the Role of Noncovalent Sulfur Interactions in Drug Design. J Med Chem 2015; 58:4383-438. [DOI: 10.1021/jm501853m] [Citation(s) in RCA: 468] [Impact Index Per Article: 52.0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 02/08/2023]
Affiliation(s)
- Brett R. Beno
- Department of Computer-Assisted Drug Design, Bristol-Myers Squibb Research and Development, 5 Research Parkway Wallingford Connecticut 06492, United States
| | - Kap-Sun Yeung
- Department of Discovery Chemistry, Bristol-Myers Squibb Research and Development, 5 Research Parkway Wallingford Connecticut 06492, United States
| | - Michael D. Bartberger
- Department of Therapeutic Discovery, Amgen Inc., One Amgen Center Drive Thousand Oaks California 91320, United States
| | - Lewis D. Pennington
- Department of Therapeutic Discovery, Amgen Inc., One Amgen Center Drive Thousand Oaks California 91320, United States
| | - Nicholas A. Meanwell
- Department of Discovery Chemistry, Bristol-Myers Squibb Research and Development, 5 Research Parkway Wallingford Connecticut 06492, United States
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8
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Fauber BP, Dragovich PS, Chen J, Corson LB, Ding CZ, Eigenbrot C, Labadie S, Malek S, Peterson D, Purkey HE, Robarge K, Sideris S, Ultsch M, Wei B, Yen I, Yue Q, Zhou A. Identification of 3,6-disubstituted dihydropyrones as inhibitors of human lactate dehydrogenase. Bioorg Med Chem Lett 2014; 24:5683-5687. [DOI: 10.1016/j.bmcl.2014.10.067] [Citation(s) in RCA: 15] [Impact Index Per Article: 1.5] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/15/2014] [Revised: 10/18/2014] [Accepted: 10/20/2014] [Indexed: 10/24/2022]
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9
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Belema M, Lopez OD, Bender JA, Romine JL, St Laurent DR, Langley DR, Lemm JA, O'Boyle DR, Sun JH, Wang C, Fridell RA, Meanwell NA. Discovery and development of hepatitis C virus NS5A replication complex inhibitors. J Med Chem 2014; 57:1643-72. [PMID: 24621191 DOI: 10.1021/jm401793m] [Citation(s) in RCA: 61] [Impact Index Per Article: 6.1] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/11/2022]
Abstract
Lead inhibitors that target the function of the hepatitis C virus (HCV) nonstructural 5A (NS5A) protein have been identified by phenotypic screening campaigns using HCV subgenomic replicons. The demonstration of antiviral activity in HCV-infected subjects by the HCV NS5A replication complex inhibitor (RCI) daclatasvir (1) spawned considerable interest in this mechanistic approach. In this Perspective, we summarize the medicinal chemistry studies that led to the discovery of 1 and other chemotypes for which resistance maps to the NS5A protein and provide synopses of the profiles of many of the compounds currently in clinical trials. We also summarize what is currently known about the NS5A protein and the studies using NS5A RCIs and labeled analogues that are helping to illuminate aspects of both protein function and inhibitor interaction. We conclude with a synopsis of the results of notable clinical trials with HCV NS5A RCIs.
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Affiliation(s)
- Makonen Belema
- Department of Discovery Chemistry, ‡Department of Virology Discovery, and §Department of Computer-Assisted Drug Design, Bristol-Myers Squibb Research and Development , 5 Research Parkway, Wallingford, Connecticut 06492, United States
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10
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Nakashima T, Yamamoto K, Kimura Y, Kawai T. Chiral Photoresponsive Tetrathiazoles That Provide Snapshots of Folding States. Chemistry 2013; 19:16972-80. [DOI: 10.1002/chem.201302564] [Citation(s) in RCA: 21] [Impact Index Per Article: 1.9] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/03/2013] [Indexed: 11/11/2022]
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11
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Tajima H, Honda T, Kawashima K, Sasabuchi Y, Yamamoto M, Ban M, Okamoto K, Inoue K, Inaba T, Takeno Y, Tsuboi T, Tonouchi A, Aono H. Pyridylmethylthio derivatives as VEGF inhibitors: Part 2. Bioorg Med Chem Lett 2011; 21:1232-5. [DOI: 10.1016/j.bmcl.2010.12.071] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.2] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/21/2010] [Revised: 12/14/2010] [Accepted: 12/15/2010] [Indexed: 10/18/2022]
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12
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Honda T, Nagahara H, Mogi H, Ban M, Aono H. KDR inhibitor with the intramolecular non-bonded interaction: conformation-activity relationships of novel indole-3-carboxamide derivatives. Bioorg Med Chem Lett 2011; 21:1782-5. [PMID: 21324683 DOI: 10.1016/j.bmcl.2011.01.063] [Citation(s) in RCA: 11] [Impact Index Per Article: 0.8] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/30/2010] [Revised: 01/04/2011] [Accepted: 01/18/2011] [Indexed: 11/16/2022]
Abstract
We previously reported that compound 1, having a similar conformation to PTK787 (2) by forming a pseudo ring structure with an intramolecular non-bonded S-O interaction, exhibited a potent inhibitory activity against VEGFR2 tyrosine kinase (KDR). Applying the ideas of pseudo ring formations, we have designed three types of novel indole carboxamide derivatives 5-7 with an intramolecular hydrogen bonding or non-bonded S-O interaction. We describe the design and synthesis of 5-7, and also discuss the relationships of their KDR inhibitory activity and conformations that were stabilized by their intramolecular non-bonded interactions.
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Affiliation(s)
- Takahiro Honda
- Research and Development Center, Santen Pharmaceutical Co. Ltd, Ikoma-shi, Nara, Japan.
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13
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Pyridylmethylthio derivatives as VEGF inhibitors. Part 1. Bioorg Med Chem Lett 2010; 20:7234-8. [DOI: 10.1016/j.bmcl.2010.10.096] [Citation(s) in RCA: 11] [Impact Index Per Article: 0.8] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/18/2010] [Revised: 10/05/2010] [Accepted: 10/20/2010] [Indexed: 11/22/2022]
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14
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Ban HS, Uno M, Nakamura H. Suppression of hypoxia-induced HIF-1alpha accumulation by VEGFR inhibitors: Different profiles of AAL993 versus SU5416 and KRN633. Cancer Lett 2010; 296:17-26. [PMID: 20378243 DOI: 10.1016/j.canlet.2010.03.010] [Citation(s) in RCA: 25] [Impact Index Per Article: 1.8] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/27/2009] [Revised: 03/12/2010] [Accepted: 03/16/2010] [Indexed: 10/19/2022]
Abstract
The hypoxia-inducible factor (HIF) is a heterodimeric basic helix-loop-helix transcriptional factor and the activated HIF plays pivotal roles in various pathological conditions, including inflammation and cancer. HIF-1alpha overexpression has been observed in many common human cancers, including brain, breast, colon, lung, ovary, and prostate, and HIF-mediated genes, such as vascular endothelial growth factor (VEGF), inducible nitric oxide synthase (iNOS), and insulin-like growth factor (IGF)-1, are associated with tumor angiogenesis, metastasis, and invasion. Therefore, the pro-oncogenic protein HIF is a novel target of cancer therapy. We examined the effects of VEGFR inhibitors, AAL993, SU5416, and KRN633, on suppression of HIF-1alpha accumulation under the hypoxic condition. We found that VEGFR tyrosine kinase inhibitors, AAL993, SU5416, and KRN633, possess dual functions: inhibition of VEGFR signaling and HIF-1alpha expression under the hypoxic condition. The detailed mechanistic study indicated that SU5416 and KRN633 suppressed HIF-1alpha expression through inhibition of both Akt and ERK phosphorylation signaling pathways, whereas AAL993 suppressed HIF-1alpha expression through ERK inhibition without affecting Akt phosphorylation.
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Affiliation(s)
- Hyun Seung Ban
- Department of Chemistry, Faculty of Science, Gakushuin University, Mejiro, Tokyo 171-8588, Japan
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15
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Synthesis of novel 1,4-benzoxazin-3-one derivatives as inhibitors against tyrosine kinases. Bioorg Med Chem 2009; 17:699-708. [DOI: 10.1016/j.bmc.2008.11.060] [Citation(s) in RCA: 12] [Impact Index Per Article: 0.8] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/06/2008] [Revised: 11/18/2008] [Accepted: 11/19/2008] [Indexed: 11/23/2022]
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