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Sundaram V, Ramanan RN, Selvaraj M, Ahemad N, Vijayaraghavan R, MacFarlane DR, Ooi CW. Probing the molecular interactions between cholinium-based ionic liquids and insulin aspart: A combined computational and experimental study. Int J Biol Macromol 2023; 253:126665. [PMID: 37689282 DOI: 10.1016/j.ijbiomac.2023.126665] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/09/2023] [Revised: 08/29/2023] [Accepted: 08/31/2023] [Indexed: 09/11/2023]
Abstract
Despite extensive studies revealing the potential of cholinium-based ionic liquids (ILs) in protein stabilization, the nature of interaction between ILs' constituents and protein residues is not well understood. In this work, we used a combined computational and experimental approach to investigate the structural stability of a peptide hormone, insulin aspart (IA), in ILs containing a choline cation [Ch]+ and either dihydrogen phosphate ([Dhp]-) or acetate ([Ace]-) as anions. Although IA remained stable in both 1 M [Ch][Dhp] and 1 M [Ch][Ace], [Dhp]- exhibited a much stronger stabilization effect than [Ace]-. Both the hydrophilic ILs intensely hydrated IA and increased the number of water molecules in IA's solvation shell. Undeterred by the increased number of water molecules, the native state of IA's hydrophobic core was maintained in the presence of ILs. Importantly, our results reveal the importance of IL concentration in the medium which was critical to maintain a steady population of ions in the microenvironment of IA and to counteract the denaturing effect of water molecules. Through molecular docking, we confirm that the anions exert the dominant effect on the structure of IA, while [Ch]+ have the secondary influence. The computational results were validated using spectroscopic analyses (ultra-violet, fluorescence, and circular dichroism) along with dynamic light scattering measurements. The extended stability of IA at 30 °C for 28 days in 1 M [Ch][Dhp] and [Ch][Ace] demonstrated in this study reveals the possibility of stabilizing IA using cholinium-based ILs.
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Affiliation(s)
- Vidya Sundaram
- Chemical Engineering Department, School of Engineering, Monash University Malaysia, Jalan Lagoon Selatan, 47500 Bandar Sunway, Selangor, Malaysia
| | - Ramakrishnan Nagasundara Ramanan
- Chemical Engineering Department, School of Engineering, Monash University Malaysia, Jalan Lagoon Selatan, 47500 Bandar Sunway, Selangor, Malaysia; Arkema Thiochemicals Sdn Bhd, Oasis Ara Damansara, 47301 Petaling Jaya, Selangor, Malaysia
| | - Manikandan Selvaraj
- Chemical Engineering Department, School of Engineering, Monash University Malaysia, Jalan Lagoon Selatan, 47500 Bandar Sunway, Selangor, Malaysia; Department of Neuroscience, Mayo Clinic, Jacksonville, FL, USA
| | - Nafees Ahemad
- School of Pharmacy, Monash University Malaysia, Jalan Lagoon Selatan, 47500 Bandar Sunway, Selangor, Malaysia
| | - R Vijayaraghavan
- School of Chemistry, Faculty of Science, Monash University, Clayton, Victoria 3800, Australia
| | - Douglas R MacFarlane
- School of Chemistry, Faculty of Science, Monash University, Clayton, Victoria 3800, Australia
| | - Chien Wei Ooi
- Chemical Engineering Department, School of Engineering, Monash University Malaysia, Jalan Lagoon Selatan, 47500 Bandar Sunway, Selangor, Malaysia; Advanced Engineering Platform, Monash University Malaysia, Jalan Lagoon Selatan, 47500 Bandar Sunway, Selangor, Malaysia.
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Yue Y, Wang Y, Tu Q, Xu Y, Zhang Y, Tang Q, Liu J. A comprehensive insight into the effects of punicalagin on pepsin: Multispectroscopy and simulations methods. J Mol Liq 2022. [DOI: 10.1016/j.molliq.2022.120194] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/31/2022]
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Mohammadi M, Shareghi B, Farhadian S, Momeni L, Saboury AA. The interaction of xylitol with carboxypeptidase A: The influence of xylitol on enzyme structure and activity. J Mol Struct 2022. [DOI: 10.1016/j.molstruc.2021.131877] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/27/2022]
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Sundaram V, Ramanan RN, Selvaraj M, Vijayaraghavan R, MacFarlane DR, Ooi CW. Structural stability of insulin aspart in aqueous cholinium aminoate ionic liquids based on molecular dynamics simulation studies. J Mol Liq 2021. [DOI: 10.1016/j.molliq.2020.114501] [Citation(s) in RCA: 7] [Impact Index Per Article: 2.3] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/23/2022]
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Asgharzadeh S, Shareghi B, Farhadian S. Experimental and theoretical investigations on the interaction of l-methionine molecules with α-chymotrypsin in the aqueous solution using various methods. Int J Biol Macromol 2019; 131:548-556. [PMID: 30876904 DOI: 10.1016/j.ijbiomac.2019.03.080] [Citation(s) in RCA: 25] [Impact Index Per Article: 5.0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/07/2019] [Revised: 03/11/2019] [Accepted: 03/11/2019] [Indexed: 11/17/2022]
Abstract
l-Methionine (l-Met) is one of the necessary amino acids that play unparalleled roles, influencing both the protein structure and metabolism. Understanding the interactions between proteins and small molecules can be realized by various perspectives, and this is significant for the progression of basic sciences and drug development. In this study, the variations in the stability, function, and structure of α-Chymotrypsin (α-Chy) in the presence of l-Met were investigated using spectroscopic and computational approaches. The results of the UV-vis absorption demonstrated that α-Chy had a maximum peak at 280 nm due to the Trp residue. Hyperchromism shift was seen in the presence of l-Met. Ground state system was formed in the presence of l-Met, as confirmed by the fluorescence studies. Fluorescence variations also revealed static quenching. The CD spectra also represented the alteration of the enzyme with an increase in the α-helix and a decrease in the β-sheet. The activity of α-Chy was incremented in the presence of l-Met. Therefore, l-Met served as an activator. Molecular docking results also indicated a negative amount for the Gibbs free energy of the binding of l-Met to the enzyme. α-Chy became more stable in the presence of l-Met, based on the molecular dynamics simulation.
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Affiliation(s)
- Sanaz Asgharzadeh
- Department of Biology, Faculty of Science, Shahrekord University, Shahrekord, P. O. Box.115, Iran
| | - Behzad Shareghi
- Department of Biology, Faculty of Science, Shahrekord University, Shahrekord, P. O. Box.115, Iran.
| | - Sadegh Farhadian
- Department of Biology, Faculty of Science, Shahrekord University, Shahrekord, P. O. Box.115, Iran; Central Laboratory, Shahrekord University, Shahrekord, Iran.
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Mamashli F, Badraghi J, Delavari B, Lanjanian H, Sabbaghian M, Hosseini M, Saboury AA. Improvement of versatile peroxidase activity and stability by a cholinium-based ionic liquid. J Mol Liq 2018. [DOI: 10.1016/j.molliq.2018.09.128] [Citation(s) in RCA: 16] [Impact Index Per Article: 2.7] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/12/2022]
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Summers SR, Sprenger KG, Pfaendtner J, Marchant J, Summers MF, Kaar JL. Mechanism of Competitive Inhibition and Destabilization of Acidothermus cellulolyticus Endoglucanase 1 by Ionic Liquids. J Phys Chem B 2017; 121:10793-10803. [DOI: 10.1021/acs.jpcb.7b08435] [Citation(s) in RCA: 20] [Impact Index Per Article: 2.9] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/23/2022]
Affiliation(s)
- Samantha R. Summers
- Department of Chemical
and Biological Engineering, University of Colorado, Boulder, Colorado 80309, United States
| | - K. G. Sprenger
- Department of Chemical Engineering, University of Washington, Seattle, Washington 98195, United States
| | - Jim Pfaendtner
- Department of Chemical Engineering, University of Washington, Seattle, Washington 98195, United States
| | - Jan Marchant
- Howard Hughes Medical Institute and Department
of Chemistry, University of Maryland Baltimore County, Baltimore, Maryland 21250, United States
| | - Michael F. Summers
- Howard Hughes Medical Institute and Department
of Chemistry, University of Maryland Baltimore County, Baltimore, Maryland 21250, United States
| | - Joel L. Kaar
- Department of Chemical
and Biological Engineering, University of Colorado, Boulder, Colorado 80309, United States
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