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Kaur A, Singh H, Kumar D, Gahlay GK, Mithu VS. Characterizing the Conformational Dynamics of Human SUMO2: Insights into its Interaction with Metal Ions and SIMs. Chembiochem 2024:e202400045. [PMID: 38593270 DOI: 10.1002/cbic.202400045] [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: 01/17/2024] [Revised: 04/09/2024] [Accepted: 04/09/2024] [Indexed: 04/11/2024]
Abstract
SUMO (Small Ubiquitin-like Modifiers) proteins are involved in a crucial post-translational modification commonly termed as SUMOylation. In this work, we have investigated the native-state conformational flexibility of human SUMO2 and its interaction with Cu2+ and Zn2+ ions using 15N-1H based 2D NMR spectroscopy. After SUMO1, SUMO2 is the most studied SUMO isoform in humans which shares 45 % and ~80 % similarity with SUMO1 in terms of sequence and structure, respectively. In this manuscript, we demonstrate that compared to SUMO1, several amino acids around the α1-helix region of SUMO2 access energetically similar near-native conformations. These conformations could play a crucial role in SUMO2's non-covalent interactions with SUMO interaction motifs (SIMs) on other proteins. The C-terminal of SUMO2 was found to bind strongly with Cu2+ ions resulting in a trimeric structure as observed by gel electrophoresis. This interaction seems to interfere in its non-covalent interaction with a V/I-x-V/I-V/I based SIM in Daxx protein.
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Affiliation(s)
- Anupreet Kaur
- Department of Chemistry, Guru Nanak Dev University, Amritsar, 143005, Punjab, India
- Present address: Institute for Bioscience and Biotechnology Research, University of Maryland & National Institute of Standards and Technology, United States
| | - Harpreet Singh
- Department of Chemistry, Guru Nanak Dev University, Amritsar, 143005, Punjab, India
| | - Dinesh Kumar
- Centre of Biomedical Research, Sanjay Gandhi Post-Graduate Institute of Medical Sciences Campus, Raebareli Road, Lucknow, 226014, Uttar Pradesh, India
| | - Gagandeep Kaur Gahlay
- Department of Molecular Biology and Biochemistry, Guru Nanak Dev University, Amritsar, 143005, Punjab, India
| | - Venus Singh Mithu
- Department of Chemistry, Guru Nanak Dev University, Amritsar, 143005, Punjab, India
- Present address: Department of NMR-based Structural Biology, Max Planck Institute for Multidisciplinary Sciences, Am Faßberg 11, Göttingen, 37077, Germany
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Kaur A, Jaiswal N, Raj R, Kumar B, Kapur S, Kumar D, Gahlay GK, Mithu VS. Characterization of Cu2+ and Zn2+ binding sites in SUMO1 and its impact on protein stability. Int J Biol Macromol 2020; 151:204-211. [DOI: 10.1016/j.ijbiomac.2020.02.116] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/12/2019] [Revised: 01/16/2020] [Accepted: 02/11/2020] [Indexed: 10/25/2022]
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Sheng Y, Hou Z, Cui S, Cao K, Yuan S, Sun M, Kljun J, Huang G, Turel I, Liu Y. Covalent versus Noncovalent Binding of Ruthenium η 6 -p-Cymene Complexes to Zinc-Finger Protein NCp7. Chemistry 2019; 25:12789-12794. [PMID: 31385356 DOI: 10.1002/chem.201902434] [Citation(s) in RCA: 11] [Impact Index Per Article: 2.2] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/28/2019] [Revised: 08/03/2019] [Indexed: 01/24/2023]
Abstract
Ruthenium-arene complexes are a unique class of organometallic compounds that have been shown to have prominent therapeutic potencies. Here, we have investigated the interactions of Ru-cymene complexes with a zinc-finger protein NCp7, aiming to understand the effects of various ligands on the reaction. Five different binding modes were observed on selected Ru-complexes. Ru-cymene complex can bind to proteins through either noncovalent binding alone or through a combination of covalent and noncovalent binding modes. Moreover, the noncovalent interaction can promote the coordination of RuII to NCp7, resulting synergistic effects of the different ligands. The binding of Ru(Cym) complexes leads to dysfunction of NCp7 through zinc-ejection and structural perturbation. These results indicate that the reactivity of Ru-complexes can be modulated by ligands through different approaches, which could be closely correlated to their different therapeutic effects.
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Affiliation(s)
- Yaping Sheng
- CAS Key Laboratory of Soft Matter Chemistry, Department of Chemistry, University of Science and Technology of China, Hefei, Anhui, 230026, P.R. China
| | - Zhuanghao Hou
- CAS Key Laboratory of Soft Matter Chemistry, Department of Chemistry, University of Science and Technology of China, Hefei, Anhui, 230026, P.R. China
| | - Shiyong Cui
- CAS Key Laboratory of Soft Matter Chemistry, Department of Chemistry, University of Science and Technology of China, Hefei, Anhui, 230026, P.R. China
| | - Kaiming Cao
- CAS Key Laboratory of Soft Matter Chemistry, Department of Chemistry, University of Science and Technology of China, Hefei, Anhui, 230026, P.R. China
| | - Siming Yuan
- CAS Key Laboratory of Soft Matter Chemistry, Department of Chemistry, University of Science and Technology of China, Hefei, Anhui, 230026, P.R. China
| | - Mei Sun
- Hefei National Laboratory for Physical Sciences at Microscale, University of Science and Technology of China, Hefei, Anhui, 230026, P.R. China
| | - Jakob Kljun
- Faculty of Chemistry and Chemical Technology, University of Ljubljana, Večna pot 113, 1000, Ljubljana, Slovenia
| | - Guangming Huang
- CAS Key Laboratory of Soft Matter Chemistry, Department of Chemistry, University of Science and Technology of China, Hefei, Anhui, 230026, P.R. China
| | - Iztok Turel
- Faculty of Chemistry and Chemical Technology, University of Ljubljana, Večna pot 113, 1000, Ljubljana, Slovenia
| | - Yangzhong Liu
- CAS Key Laboratory of Soft Matter Chemistry, Department of Chemistry, University of Science and Technology of China, Hefei, Anhui, 230026, P.R. China
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