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Shekhar S, Meena R, Lal J, Yadav M, Kant R, Reddy DN. Stabilizing Bifurcated Hydrogen Bond in 8-Aminoquinoline Appended Peptides. Chem Asian J 2024:e202400248. [PMID: 38701035 DOI: 10.1002/asia.202400248] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/06/2024] [Revised: 04/21/2024] [Accepted: 05/03/2024] [Indexed: 05/05/2024]
Abstract
The hydrogen bonding interaction between an amide N-H and the amide N of the preceding residue is prevalent in proline-containing proteins and peptides. However, the N-H⋅⋅⋅N hydrogen bonding interaction is rare in non-prolyl natural peptides due to restricted dihedral angles. Herein, we stabilize this type of interaction in 8-aminoquinoline appended non-prolyl peptides through bifurcated N⋅⋅⋅H⋅⋅⋅N hydrogen bond. The 8-aminoquinoline-incorporated model peptides 2 a-i were designed, synthesized, and the crystal structures of 2 a-c and 2 i were solved. Analysis of crystal data reveals that the amide N-H of aminoquinoline is involved in bifurcated hydrogen bonding interaction with the nitrogen of the preceding amino acid residue and the nitrogen in quinoline. Analysis of crystal packing, Hirshfeld surface and fingerprint plots confirms that the intermolecular O⋅⋅⋅H contacts significantly contribute to stabilizing bifurcated N⋅⋅⋅H⋅⋅⋅N hydrogen bonding interaction. Furthermore, NMR experiments and CD spectroscopy were conducted to examine the preferred conformation in solution, and the data corroborate with the crystal structure conformation.
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Affiliation(s)
- Shashank Shekhar
- Medicinal and Process Chemistry Division, CSIR-Central Drug Research Institute, 226031, Lucknow, India
- Academy of Scientific and Innovative Research (AcSIR), 201002, Ghaziabad, India
| | - Rachana Meena
- Medicinal and Process Chemistry Division, CSIR-Central Drug Research Institute, 226031, Lucknow, India
- Academy of Scientific and Innovative Research (AcSIR), 201002, Ghaziabad, India
| | - Jhajan Lal
- Medicinal and Process Chemistry Division, CSIR-Central Drug Research Institute, 226031, Lucknow, India
- Academy of Scientific and Innovative Research (AcSIR), 201002, Ghaziabad, India
| | - Mukul Yadav
- Medicinal and Process Chemistry Division, CSIR-Central Drug Research Institute, 226031, Lucknow, India
| | - Ruchir Kant
- Division of Biochemistry and Structural Biology, CSIR-Central Drug Research Institute, 226031, Lucknow, India
| | - Damodara N Reddy
- Medicinal and Process Chemistry Division, CSIR-Central Drug Research Institute, 226031, Lucknow, India
- Academy of Scientific and Innovative Research (AcSIR), 201002, Ghaziabad, India
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Cameron AJ, Davison EK, An C, Stubbing LA, Dunbar PR, Harris PWR, Brimble MA. Synthesis and SAR Analysis of Lipovelutibols B and D and Their Lipid Analogues. J Org Chem 2019; 85:1401-1406. [DOI: 10.1021/acs.joc.9b02348] [Citation(s) in RCA: 4] [Impact Index Per Article: 0.8] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/28/2022]
Affiliation(s)
- Alan J. Cameron
- School of Chemical Sciences, University of Auckland, 23 Symonds Street, Auckland, 1010, New Zealand
- School of Biological Sciences, University of Auckland, 3 Symonds Street, Auckland, 1010, New Zealand
- The Maurice Wilkins Centre for Molecular Biodiscovery, The University of Auckland, Private
Bag 92019, Auckland, 1142, New Zealand
| | - Emma K. Davison
- School of Chemical Sciences, University of Auckland, 23 Symonds Street, Auckland, 1010, New Zealand
- School of Biological Sciences, University of Auckland, 3 Symonds Street, Auckland, 1010, New Zealand
- The Maurice Wilkins Centre for Molecular Biodiscovery, The University of Auckland, Private
Bag 92019, Auckland, 1142, New Zealand
| | - Chalice An
- School of Chemical Sciences, University of Auckland, 23 Symonds Street, Auckland, 1010, New Zealand
- School of Biological Sciences, University of Auckland, 3 Symonds Street, Auckland, 1010, New Zealand
| | - Louise A. Stubbing
- School of Chemical Sciences, University of Auckland, 23 Symonds Street, Auckland, 1010, New Zealand
- The Maurice Wilkins Centre for Molecular Biodiscovery, The University of Auckland, Private
Bag 92019, Auckland, 1142, New Zealand
| | - P. Rod Dunbar
- School of Biological Sciences, University of Auckland, 3 Symonds Street, Auckland, 1010, New Zealand
- The Maurice Wilkins Centre for Molecular Biodiscovery, The University of Auckland, Private
Bag 92019, Auckland, 1142, New Zealand
| | - Paul W. R. Harris
- School of Chemical Sciences, University of Auckland, 23 Symonds Street, Auckland, 1010, New Zealand
- School of Biological Sciences, University of Auckland, 3 Symonds Street, Auckland, 1010, New Zealand
- The Maurice Wilkins Centre for Molecular Biodiscovery, The University of Auckland, Private
Bag 92019, Auckland, 1142, New Zealand
| | - Margaret A. Brimble
- School of Chemical Sciences, University of Auckland, 23 Symonds Street, Auckland, 1010, New Zealand
- School of Biological Sciences, University of Auckland, 3 Symonds Street, Auckland, 1010, New Zealand
- The Maurice Wilkins Centre for Molecular Biodiscovery, The University of Auckland, Private
Bag 92019, Auckland, 1142, New Zealand
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Reddy PS, Metanis N. Small molecule diselenide additives for in vitro oxidative protein folding. Chem Commun (Camb) 2016; 52:3336-9. [PMID: 26822519 DOI: 10.1039/c5cc10451c] [Citation(s) in RCA: 21] [Impact Index Per Article: 2.6] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/10/2023]
Abstract
The in vitro oxidative folding of disulfide-rich proteins can be challenging. Here we show a new class of small molecule diselenides, which can be easily prepared from inexpensive starting materials, used to enhance oxidative protein folding. These compounds were tested on a model protein, bovine pancreatic trypsin inhibitor. Two of the tested diselenides showed considerable improvement over glutathione and were on par with the previously described selenoglutathione.
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Affiliation(s)
- Post Sai Reddy
- Institute of Chemistry, The Hebrew University of Jerusalem, Jerusalem, 91904, Israel.
| | - Norman Metanis
- Institute of Chemistry, The Hebrew University of Jerusalem, Jerusalem, 91904, Israel.
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Thalluri K, Paul A, Manne SR, Dev D, Mandal B. Microwave assisted chemoselective organocatalytic peptide alcohol synthesis from C-terminal amide. RSC Adv 2014. [DOI: 10.1039/c4ra09091h] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/21/2022] Open
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