1
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Wickramasinghe HC, Lincoln JN, D'Armond AE, Noble SA, Shen L, Macnaughtan MA. Insights into the association of the Chlamydia trachomatis type III secretion chaperone complex, Scc4:Scc1, from sequential expression in Escherichia coli. Protein Expr Purif 2024; 222:106532. [PMID: 38857716 DOI: 10.1016/j.pep.2024.106532] [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: 03/18/2024] [Revised: 06/03/2024] [Accepted: 06/08/2024] [Indexed: 06/12/2024]
Abstract
Chlamydia trachomatis (CT) is the bacterial pathogen responsible for causing the most common sexually transmitted disease in the United States. This obligate, intracellular Gram-negative bacterium has a type III secretion system (T3SS) to invade host cells. CopN is an important effector, plug protein that mediates early interactions between the host and Chlamydia. CopN is chaperoned by a heterodimer, T3SS chaperone complex containing Scc4 and Scc1. Scc4 is a unique, bifunctional protein that, in addition to its T3SS chaperone activity, acts as an RNA polymerase (RNAP) binding protein. We hypothesized that the two functions occur at different points in CT's developmental cycle with Scc4 acting alone in the early-to-mid stages and the Scc4:Scc1 complex chaperoning CopN in the mid-to-late stages. To study the Scc4:Scc1 complex by NMR, we previously explored various methods of associating Scc4 and Scc1 in vitro to produce the complex with chain-selective isotopic labeling. Though co-expressed Scc4 and Scc1 form a stable complex, the in vitro association studies suggest that partial protein denaturation and/or components in E. coli lysate are necessary to form the stable complex. In this study Scc4 and Scc1 were sequentially expressed in E. coli under the control of different promoters, allowing separate isotopic labeling of each chain and complex formation in vivo. Sequential expression resulted in no or unstable complex formation depending on the culture medium used. These results, taken together with previous in vitro association studies, suggest that Scc4 and Scc1 assemble co-translationally to form the stable Scc4:Scc1 complex in E. coli.
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Affiliation(s)
| | - Juliette N Lincoln
- Department of Chemistry, Louisiana State University, Baton Rouge, LA, 70803, United States
| | - Anne E D'Armond
- Department of Chemistry, Louisiana State University, Baton Rouge, LA, 70803, United States
| | - Sadie A Noble
- Department of Chemistry, Louisiana State University, Baton Rouge, LA, 70803, United States
| | - Li Shen
- Department of Microbiology, Immunology, and Parasitology, Louisiana State University Health Sciences Center, New Orleans, LA, 70112, United States
| | - Megan A Macnaughtan
- Department of Chemistry, Louisiana State University, Baton Rouge, LA, 70803, United States; Department of Chemistry and Biochemistry, John Carroll University, University Heights, OH, 44118, United States.
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2
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Li H, Zhang J, Wang Z, Shi P, Shi C. Genetically encoded site-specific 19F unnatural amino acid incorporation in V. natriegens for in-cell NMR analysis. Protein Expr Purif 2024; 219:106461. [PMID: 38460621 DOI: 10.1016/j.pep.2024.106461] [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: 11/25/2023] [Revised: 01/22/2024] [Accepted: 02/29/2024] [Indexed: 03/11/2024]
Abstract
Nuclear magnetic resonance (NMR) spectroscopy NMR is a well-established technique for probing protein structure, dynamics and conformational changes. Taking advantage of the high signal sensitivity and broad chemical shift range of 19F nuclei, 19F NMR has been applied to investigate protein function at atomic resolution. In this report, we extend the unnatural amino acid site-specific incorporation into V. natriegens, an alternate protein expression system. The unnatural amino acid L-4-trifluoromethylphenylalanine (tfmF) was site-specifically introduced into the mitogen-activated protein kinase MEKK3 in V. natriegens using genetically encoded technology, which will be an extensive method for in-cell protein structure and dynamic investigation.
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Affiliation(s)
- Hao Li
- Anhui Vocational and Technical College, Hefei, Anhui, 230011, PR China; Hefei National Research Center for Interdisciplinary Sciences at the Microscale, University of Science and Technology of China, Hefei, Anhui, 230027, PR China.
| | - Jin Zhang
- Hefei National Research Center for Interdisciplinary Sciences at the Microscale, University of Science and Technology of China, Hefei, Anhui, 230027, PR China
| | - Zilong Wang
- Hefei National Research Center for Interdisciplinary Sciences at the Microscale, University of Science and Technology of China, Hefei, Anhui, 230027, PR China
| | - Pan Shi
- Hefei National Research Center for Interdisciplinary Sciences at the Microscale, University of Science and Technology of China, Hefei, Anhui, 230027, PR China
| | - Chaowei Shi
- Hefei National Research Center for Interdisciplinary Sciences at the Microscale, University of Science and Technology of China, Hefei, Anhui, 230027, PR China.
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3
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Myint W, Schiffer CA, Matsuo H. HIV-1 VIF and human APOBEC3G interaction directly observed through molecular specific labeling using a new dual promotor vector. JOURNAL OF MAGNETIC RESONANCE (SAN DIEGO, CALIF. : 1997) 2022; 339:107230. [PMID: 35550909 PMCID: PMC9149140 DOI: 10.1016/j.jmr.2022.107230] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Subscribe] [Scholar Register] [Received: 01/26/2022] [Revised: 04/06/2022] [Accepted: 04/21/2022] [Indexed: 06/03/2023]
Abstract
Over the last few decades, protein NMR isotope labeling methods using E. coli based expression have revolutionized the information accessible from biomolecular NMR experiments. Selective labeling of a protein of interest in a multi-protein complex can significantly reduce the number of cross-peaks and allow for study of large protein complexes. However, limitations still remain since some proteins are not stable independently and cannot be separately labeled in either NMR active isotope enriched or unenriched media and reconstituted into a multimeric complex. To overcome this limitation, the LEGO NMR method was previously developed using protein expression plasmids containing T7 or araBAD promoters to separately express proteins in the same E. coli after changing between labeled and unlabeled media. Building on this, we developed a method to label the Human Immunodeficiency Virus type 1 viral infectivity factor (HIV-1 Vif), a monomerically unstable protein, in complex with CBFβ, it's host binding partner. We designed a dual promoter plasmid containing both T7 and araBAD promoters to independently control the expression of HIV-1 Vif in NMR active isotope enriched media and CBFβ in unenriched media. Using this method, we assigned the backbone resonance and directly observed the binding of HIV-1 Vif with APOBEC3G, a host restriction factor to HIV-1.
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Affiliation(s)
- Wazo Myint
- Basic Science Program, Frederick National Laboratory for Cancer Research, Frederick, MD 21702, USA
| | - Celia A Schiffer
- Department of Biochemistry and Molecular Biotechnology, University of Massachusetts Chan Medical School, Worcester, MA 01655, USA
| | - Hiroshi Matsuo
- Basic Science Program, Frederick National Laboratory for Cancer Research, Frederick, MD 21702, USA.
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4
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Schütz S, Sprangers R. Methyl TROSY spectroscopy: A versatile NMR approach to study challenging biological systems. PROGRESS IN NUCLEAR MAGNETIC RESONANCE SPECTROSCOPY 2020; 116:56-84. [PMID: 32130959 DOI: 10.1016/j.pnmrs.2019.09.004] [Citation(s) in RCA: 76] [Impact Index Per Article: 19.0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 07/05/2019] [Revised: 09/09/2019] [Accepted: 09/25/2019] [Indexed: 05/21/2023]
Abstract
A major goal in structural biology is to unravel how molecular machines function in detail. To that end, solution-state NMR spectroscopy is ideally suited as it is able to study biological assemblies in a near natural environment. Based on methyl TROSY methods, it is now possible to record high-quality data on complexes that are far over 100 kDa in molecular weight. In this review, we discuss the theoretical background of methyl TROSY spectroscopy, the information that can be extracted from methyl TROSY spectra and approaches that can be used to assign methyl resonances in large complexes. In addition, we touch upon insights that have been obtained for a number of challenging biological systems, including the 20S proteasome, the RNA exosome, molecular chaperones and G-protein-coupled receptors. We anticipate that methyl TROSY methods will be increasingly important in modern structural biology approaches, where information regarding static structures is complemented with insights into conformational changes and dynamic intermolecular interactions.
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Affiliation(s)
- Stefan Schütz
- Institute of Biophysics and Physical Biochemistry, University of Regensburg, Universitätsstrasse 31, 93053 Regensburg, Germany
| | - Remco Sprangers
- Institute of Biophysics and Physical Biochemistry, University of Regensburg, Universitätsstrasse 31, 93053 Regensburg, Germany.
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5
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Becker W, Wimberger F, Zangger K. Vibrio natriegens: An Alternative Expression System for the High-Yield Production of Isotopically Labeled Proteins. Biochemistry 2019; 58:2799-2803. [DOI: 10.1021/acs.biochem.9b00403] [Citation(s) in RCA: 15] [Impact Index Per Article: 3.0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/29/2022]
Affiliation(s)
- Walter Becker
- Institute of Chemistry, University of Graz, Graz 8010, Austria
| | | | - Klaus Zangger
- Institute of Chemistry, University of Graz, Graz 8010, Austria
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6
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Accessing Structure, Dynamics and Function of Biological Macromolecules by NMR Through Advances in Isotope Labeling. J Indian Inst Sci 2018. [DOI: 10.1007/s41745-018-0085-1] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.2] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/21/2022]
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7
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Perez-Pepe M, Fernández-Alvarez AJ, Boccaccio GL. Life and Work of Stress Granules and Processing Bodies: New Insights into Their Formation and Function. Biochemistry 2018; 57:2488-2498. [PMID: 29595960 DOI: 10.1021/acs.biochem.8b00025] [Citation(s) in RCA: 25] [Impact Index Per Article: 4.2] [Reference Citation Analysis] [Abstract] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/19/2022]
Abstract
The dynamic formation of stress granules (SGs), processing bodies (PBs), and related RNA organelles regulates diverse cellular processes, including the coordination of functionally connected messengers, the translational regulation at the synapse, and the control of viruses and retrotransposons. Recent studies have shown that pyruvate kinase and other enzymes localize in SGs and PBs, where they become protected from stress insults. These observations may have implications for enzyme regulation and metabolic control exerted by RNA-based organelles. The formation of these cellular bodies is governed by liquid-liquid phase separation (LLPS) processes, and it needs to be strictly controlled to prevent pathogenic aggregation. The intracellular concentration of key metabolites, such as ATP and sterol derivatives, may influence protein solubility, thus affecting the dynamics of liquid organelles. LLPS in vitro depends on the thermal diffusion of macromolecules, which is limited inside cells, where the condensation and dissolution of membrane-less organelles are helped by energy-driven processes. The active transport by the retrograde motor dynein helps SG assembly, whereas the anterograde motor kinesin mediates SG dissolution; a tug of war between these two molecular motors allows transient SG formation. There is evidence that the efficiency of dynein-mediated transport increases with the number of motor molecules associated with the cargo. The dynein-dependent transport may be influenced by cargo size as larger cargos can load a larger number of motors. We propose a model based on this emergent property of dynein motors, which would be collectively stronger during SG condensation and weaker during SG breakdown, thus allowing kinesin-mediated dispersion.
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Affiliation(s)
- Marcelo Perez-Pepe
- Instituto Leloir and Instituto de Investigaciones Bioquı́micas de Buenos Aires (IIBBA)-CONICET , Buenos Aires , Argentina
| | - Ana J Fernández-Alvarez
- Instituto Leloir and Instituto de Investigaciones Bioquı́micas de Buenos Aires (IIBBA)-CONICET , Buenos Aires , Argentina
| | - Graciela L Boccaccio
- Instituto Leloir and Instituto de Investigaciones Bioquı́micas de Buenos Aires (IIBBA)-CONICET , Buenos Aires , Argentina
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8
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Hoffmann B, Löhr F, Laguerre A, Bernhard F, Dötsch V. Protein labeling strategies for liquid-state NMR spectroscopy using cell-free synthesis. PROGRESS IN NUCLEAR MAGNETIC RESONANCE SPECTROSCOPY 2018; 105:1-22. [PMID: 29548364 DOI: 10.1016/j.pnmrs.2017.11.004] [Citation(s) in RCA: 12] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 11/15/2017] [Accepted: 11/16/2017] [Indexed: 05/17/2023]
Abstract
Preparation of a protein sample for liquid-state nuclear magnetic resonance (NMR) spectroscopy analysis requires optimization of many parameters. This review describes labeling strategies for obtaining assignments of protein resonances. Particular emphasis is placed on the advantages of cell-free protein production, which enables exclusive labeling of the protein of interest, thereby simplifying downstream processing steps and increasing the availability of different labeling strategies for a target protein. Furthermore, proteins can be synthesized in milligram yields, and the open nature of the cell-free system allows the addition of stabilizers, scrambling inhibitors or hydrophobic solubilization environments directly during the protein synthesis, which is especially beneficial for membrane proteins. Selective amino acid labeling of the protein of interest, the possibility of addressing scrambling issues and avoiding the need for labile amino acid precursors have been key factors in enabling the introduction of new assignment strategies based on different labeling schemes as well as on new pulse sequences. Combinatorial selective labeling methods have been developed to reduce the number of protein samples necessary to achieve a complete backbone assignment. Furthermore, selective labeling helps to decrease spectral overlap and overcome size limitations for solution NMR analysis of larger complexes, oligomers, intrinsically disordered proteins and membrane proteins.
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Affiliation(s)
- Beate Hoffmann
- Institute of Biophysical Chemistry and Center for Biomolecular Magnetic Resonance, Goethe University, Max-von-Laue Str. 9, 60438 Frankfurt, Germany
| | - Frank Löhr
- Institute of Biophysical Chemistry and Center for Biomolecular Magnetic Resonance, Goethe University, Max-von-Laue Str. 9, 60438 Frankfurt, Germany
| | - Aisha Laguerre
- Institute of Biophysical Chemistry and Center for Biomolecular Magnetic Resonance, Goethe University, Max-von-Laue Str. 9, 60438 Frankfurt, Germany
| | - Frank Bernhard
- Institute of Biophysical Chemistry and Center for Biomolecular Magnetic Resonance, Goethe University, Max-von-Laue Str. 9, 60438 Frankfurt, Germany
| | - Volker Dötsch
- Institute of Biophysical Chemistry and Center for Biomolecular Magnetic Resonance, Goethe University, Max-von-Laue Str. 9, 60438 Frankfurt, Germany.
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9
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Alphonse S, Itin B, Khayat R, Ghose R. Sequential Protein Expression and Capsid Assembly in Cell: Toward the Study of Multiprotein Viral Capsids Using Solid-State Nuclear Magnetic Resonance Techniques. Biochemistry 2018; 57:1568-1571. [PMID: 29465229 DOI: 10.1021/acs.biochem.8b00003] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.2] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/29/2022]
Abstract
While solid-state nuclear magnetic resonance (ssNMR) has emerged as a powerful technique for studying viral capsids, current studies are limited to capsids formed from single proteins or single polyproteins. The ability to selectively label individual protein components within multiprotein viral capsids and the resulting spectral simplification will facilitate the extension of ssNMR techniques to complex viruses. In vitro capsid assembly by combining individually purified, labeled, and unlabeled components in NMR quantities is not a viable option for most viruses. To overcome this barrier, we present a method that utilizes sequential protein expression and in cell assembly of component-specifically labeled viral capsids in amounts suitable for NMR studies. We apply this approach to purify capsids of bacteriophage ϕ6 isotopically labeled on only one of its four constituent protein components, the NTPase P4. Using P4-labeled ϕ6 capsids and the sensitivity enhancement provided by dynamic nuclear polarization, we illustrate the utility of this method to enable ssNMR studies of complex viruses.
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Affiliation(s)
- Sébastien Alphonse
- Department of Chemistry and Biochemistry , The City College of New York , 160 Convent Avenue , New York , New York 10031 , United States
| | - Boris Itin
- New York Structural Biology Center , 89 Convent Avenue , New York , New York 10027 , United States
| | - Reza Khayat
- Department of Chemistry and Biochemistry , The City College of New York , 160 Convent Avenue , New York , New York 10031 , United States.,PhD Programs in Biochemistry and Chemistry , The Graduate Center, City University of New York , New York , New York 10016 , United States
| | - Ranajeet Ghose
- Department of Chemistry and Biochemistry , The City College of New York , 160 Convent Avenue , New York , New York 10031 , United States.,PhD Programs in Biochemistry and Chemistry , The Graduate Center, City University of New York , New York , New York 10016 , United States.,PhD Program in Physics , The Graduate Center, City University of New York , New York , New York 10016 , United States
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10
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Sugiki T, Furuita K, Fujiwara T, Kojima C. Current NMR Techniques for Structure-Based Drug Discovery. Molecules 2018; 23:molecules23010148. [PMID: 29329228 PMCID: PMC6017608 DOI: 10.3390/molecules23010148] [Citation(s) in RCA: 71] [Impact Index Per Article: 11.8] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/27/2017] [Revised: 12/28/2017] [Accepted: 01/09/2018] [Indexed: 12/22/2022] Open
Abstract
A variety of nuclear magnetic resonance (NMR) applications have been developed for structure-based drug discovery (SBDD). NMR provides many advantages over other methods, such as the ability to directly observe chemical compounds and target biomolecules, and to be used for ligand-based and protein-based approaches. NMR can also provide important information about the interactions in a protein-ligand complex, such as structure, dynamics, and affinity, even when the interaction is too weak to be detected by ELISA or fluorescence resonance energy transfer (FRET)-based high-throughput screening (HTS) or to be crystalized. In this study, we reviewed current NMR techniques. We focused on recent progress in NMR measurement and sample preparation techniques that have expanded the potential of NMR-based SBDD, such as fluorine NMR (19F-NMR) screening, structure modeling of weak complexes, and site-specific isotope labeling of challenging targets.
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Affiliation(s)
- Toshihiko Sugiki
- Institute for Protein Research, Osaka University, Osaka 565-0871, Japan.
| | - Kyoko Furuita
- Institute for Protein Research, Osaka University, Osaka 565-0871, Japan.
| | | | - Chojiro Kojima
- Institute for Protein Research, Osaka University, Osaka 565-0871, Japan.
- Graduate School of Engineering, Yokohama National University, Yokohama 240-8501, Japan.
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11
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Karaca E, Rodrigues JPGLM, Graziadei A, Bonvin AMJJ, Carlomagno T. M3: an integrative framework for structure determination of molecular machines. Nat Methods 2017; 14:897-902. [DOI: 10.1038/nmeth.4392] [Citation(s) in RCA: 34] [Impact Index Per Article: 4.9] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/21/2017] [Accepted: 07/05/2017] [Indexed: 01/22/2023]
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12
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Jiang Y, Kalodimos CG. NMR Studies of Large Proteins. J Mol Biol 2017; 429:2667-2676. [PMID: 28728982 DOI: 10.1016/j.jmb.2017.07.007] [Citation(s) in RCA: 45] [Impact Index Per Article: 6.4] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/09/2017] [Revised: 07/06/2017] [Accepted: 07/06/2017] [Indexed: 01/08/2023]
Abstract
Recent breakthroughs in isotope-labeling and pulse sequence techniques have enabled the NMR characterization of large protein systems with molecular masses of hundreds of kilodaltons. NMR studies of a great variety of large proteins have provided unique insights into the binding, dynamic, and allosteric mechanisms. Here we present a brief summary of these developments by highlighting few cases that exemplify the uniqueness of NMR in providing atomic resolution information into key dynamic processes and structures of protein complexes with high degree of flexibility.
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Affiliation(s)
- Yajun Jiang
- Department of Biochemistry, Molecular Biology & Biophysics, University of Minnesota, Minneapolis, MN 55455, United States; Department of Structural Biology, St. Jude Children's Research Hospital, Memphis, TN 38105, United States
| | - Charalampos G Kalodimos
- Department of Biochemistry, Molecular Biology & Biophysics, University of Minnesota, Minneapolis, MN 55455, United States; Department of Structural Biology, St. Jude Children's Research Hospital, Memphis, TN 38105, United States.
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13
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Huang C, Kalodimos CG. Structures of Large Protein Complexes Determined by Nuclear Magnetic Resonance Spectroscopy. Annu Rev Biophys 2017; 46:317-336. [DOI: 10.1146/annurev-biophys-070816-033701] [Citation(s) in RCA: 47] [Impact Index Per Article: 6.7] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/09/2022]
Affiliation(s)
- Chengdong Huang
- Department of Biochemistry, Molecular Biology, and Biophysics, University of Minnesota, Minneapolis, Minnesota 55455
| | - Charalampos G. Kalodimos
- Department of Biochemistry, Molecular Biology, and Biophysics, University of Minnesota, Minneapolis, Minnesota 55455
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14
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Mohanty B, Williams ML, Doak BC, Vazirani M, Ilyichova O, Wang G, Bermel W, Simpson JS, Chalmers DK, King GF, Mobli M, Scanlon MJ. Determination of ligand binding modes in weak protein-ligand complexes using sparse NMR data. JOURNAL OF BIOMOLECULAR NMR 2016; 66:195-208. [PMID: 27778134 DOI: 10.1007/s10858-016-0067-4] [Citation(s) in RCA: 11] [Impact Index Per Article: 1.4] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 09/02/2016] [Accepted: 09/29/2016] [Indexed: 06/06/2023]
Abstract
We describe a general approach to determine the binding pose of small molecules in weakly bound protein-ligand complexes by deriving distance constraints between the ligand and methyl groups from all methyl-containing residues of the protein. We demonstrate that using a single sample, which can be prepared without the use of expensive precursors, it is possible to generate high-resolution data rapidly and obtain the resonance assignments of Ile, Leu, Val, Ala and Thr methyl groups using triple resonance scalar correlation data. The same sample may be used to obtain Met εCH3 assignments using NOESY-based methods, although the superior sensitivity of NOESY using [U-13C,15N]-labeled protein makes the use of this second sample more efficient. We describe a structural model for a weakly binding ligand bound to its target protein, DsbA, derived from intermolecular methyl-to-ligand nuclear Overhauser enhancements, and demonstrate that the ability to assign all methyl resonances in the spectrum is essential to derive an accurate model of the structure. Once the methyl assignments have been obtained, this approach provides a rapid means to generate structural models for weakly bound protein-ligand complexes. Such weak complexes are often found at the beginning of programs of fragment based drug design and can be challenging to characterize using X-ray crystallography.
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Affiliation(s)
- Biswaranjan Mohanty
- Medicinal Chemistry, Monash Institute of Pharmaceutical Sciences, Monash University, 381 Royal Parade, Parkville, VIC, 3052, Australia
| | - Martin L Williams
- Medicinal Chemistry, Monash Institute of Pharmaceutical Sciences, Monash University, 381 Royal Parade, Parkville, VIC, 3052, Australia
| | - Bradley C Doak
- Medicinal Chemistry, Monash Institute of Pharmaceutical Sciences, Monash University, 381 Royal Parade, Parkville, VIC, 3052, Australia
| | - Mansha Vazirani
- Medicinal Chemistry, Monash Institute of Pharmaceutical Sciences, Monash University, 381 Royal Parade, Parkville, VIC, 3052, Australia
| | - Olga Ilyichova
- Medicinal Chemistry, Monash Institute of Pharmaceutical Sciences, Monash University, 381 Royal Parade, Parkville, VIC, 3052, Australia
| | - Geqing Wang
- Medicinal Chemistry, Monash Institute of Pharmaceutical Sciences, Monash University, 381 Royal Parade, Parkville, VIC, 3052, Australia
- La Trobe Institute for Molecular Bioscience, La Trobe University, Bundoora, VIC, 3083, Australia
| | - Wolfgang Bermel
- Bruker Biospin GmbH, Silberstreifen, 76287, Rheinstetten, Germany
| | - Jamie S Simpson
- Medicinal Chemistry, Monash Institute of Pharmaceutical Sciences, Monash University, 381 Royal Parade, Parkville, VIC, 3052, Australia
| | - David K Chalmers
- Medicinal Chemistry, Monash Institute of Pharmaceutical Sciences, Monash University, 381 Royal Parade, Parkville, VIC, 3052, Australia
| | - Glenn F King
- Institute for Molecular Bioscience, The University of Queensland, St Lucia, QLD, 4072, Australia
| | - Mehdi Mobli
- Centre for Advanced Imaging, The University of Queensland, St Lucia, QLD, 4072, Australia.
| | - Martin J Scanlon
- Medicinal Chemistry, Monash Institute of Pharmaceutical Sciences, Monash University, 381 Royal Parade, Parkville, VIC, 3052, Australia.
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15
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Zhang H, van Ingen H. Isotope-labeling strategies for solution NMR studies of macromolecular assemblies. Curr Opin Struct Biol 2016; 38:75-82. [PMID: 27295425 DOI: 10.1016/j.sbi.2016.05.008] [Citation(s) in RCA: 21] [Impact Index Per Article: 2.6] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/15/2016] [Revised: 05/20/2016] [Accepted: 05/22/2016] [Indexed: 12/21/2022]
Abstract
Proteins come together in macromolecular assemblies, recognizing and binding to each other through their structures, and operating on their substrates through their motions. Detailed characterization of these processes is particularly suited to NMR, a high-resolution technique sensitive to structure, dynamics, and interactions. Advances in isotope-labeling have enabled such studies to an ever-increasing range of systems. Here we highlight recent applications and bring to the fore the range of options to produce labeled proteins and to control the specific placement of isotopes. The increased labeling control and affordability, together with the possibility to combine strategies will further deepen and extend the range of protein assembly investigations.
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Affiliation(s)
- Heyi Zhang
- Macromolecular Biochemistry, Leiden Institute of Chemistry, Leiden University, Einsteinweg 55, Leiden, The Netherlands
| | - Hugo van Ingen
- Macromolecular Biochemistry, Leiden Institute of Chemistry, Leiden University, Einsteinweg 55, Leiden, The Netherlands.
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16
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Audin MJC, Wurm JP, Cvetkovic MA, Sprangers R. The oligomeric architecture of the archaeal exosome is important for processive and efficient RNA degradation. Nucleic Acids Res 2016; 44:2962-73. [PMID: 26837575 PMCID: PMC4824110 DOI: 10.1093/nar/gkw062] [Citation(s) in RCA: 17] [Impact Index Per Article: 2.1] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/14/2015] [Accepted: 01/25/2016] [Indexed: 11/30/2022] Open
Abstract
The exosome plays an important role in RNA degradation and processing. In archaea, three Rrp41:Rrp42 heterodimers assemble into a barrel like structure that contains a narrow RNA entrance pore and a lumen that contains three active sites. Here, we demonstrate that this quaternary structure of the exosome is important for efficient RNA degradation. We find that the entrance pore of the barrel is required for nM substrate affinity. This strong interaction is crucial for processive substrate degradation and prevents premature release of the RNA from the enzyme. Using methyl TROSY NMR techniques, we establish that the 3′ end of the substrate remains highly flexible inside the lumen. As a result, the RNA jumps between the three active sites that all equally participate in substrate degradation. The RNA jumping rate is, however, much faster than the cleavage rate, indicating that not all active site:substrate encounters result in catalysis. Enzymatic turnover therefore benefits from the confinement of the active sites and substrate in the lumen, which ensures that the RNA is at all times bound to one of the active sites. The evolution of the exosome into a hexameric complex and the optimization of its catalytic efficiency were thus likely co-occurring events.
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Affiliation(s)
- Maxime J C Audin
- Max Planck Institute for Developmental Biology, Spemannstrasse 35, 72076 Tübingen, Germany
| | - Jan Philip Wurm
- Max Planck Institute for Developmental Biology, Spemannstrasse 35, 72076 Tübingen, Germany
| | - Milos A Cvetkovic
- Max Planck Institute for Developmental Biology, Spemannstrasse 35, 72076 Tübingen, Germany
| | - Remco Sprangers
- Max Planck Institute for Developmental Biology, Spemannstrasse 35, 72076 Tübingen, Germany
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Kay LE. New Views of Functionally Dynamic Proteins by Solution NMR Spectroscopy. J Mol Biol 2016; 428:323-331. [DOI: 10.1016/j.jmb.2015.11.028] [Citation(s) in RCA: 69] [Impact Index Per Article: 8.6] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/19/2015] [Revised: 11/24/2015] [Accepted: 11/25/2015] [Indexed: 10/22/2022]
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Rosenzweig R, Kay LE. Solution NMR Spectroscopy Provides an Avenue for the Study of Functionally Dynamic Molecular Machines: The Example of Protein Disaggregation. J Am Chem Soc 2015; 138:1466-77. [PMID: 26651836 DOI: 10.1021/jacs.5b11346] [Citation(s) in RCA: 23] [Impact Index Per Article: 2.6] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/29/2022]
Abstract
Solution-based NMR spectroscopy has been an important tool for studying the structure and dynamics of relatively small proteins and protein complexes with aggregate molecular masses under approximately 50 kDa. The development of new experiments and labeling schemes, coupled with continued improvements in hardware, has significantly reduced this size limitation, enabling atomic-resolution studies of molecular machines in the 1 MDa range. In this Perspective, some of the important advances are highlighted in the context of studies of molecular chaperones involved in protein disaggregation. New insights into the structural biology of disaggregation obtained from NMR studies are described, focusing on the unique capabilities of the methodology for obtaining atomic-resolution descriptions of dynamic systems.
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Affiliation(s)
- Rina Rosenzweig
- Departments of Molecular Genetics, Biochemistry, and Chemistry, The University of Toronto , Toronto, Ontario, Canada M5S 1A8
| | - Lewis E Kay
- Departments of Molecular Genetics, Biochemistry, and Chemistry, The University of Toronto , Toronto, Ontario, Canada M5S 1A8.,Program in Molecular Structure and Function, Hospital for Sick Children , 555 University Avenue, Toronto, Ontario, Canada M5G 1X8
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Wiesner S, Sprangers R. Methyl groups as NMR probes for biomolecular interactions. Curr Opin Struct Biol 2015; 35:60-7. [DOI: 10.1016/j.sbi.2015.08.010] [Citation(s) in RCA: 60] [Impact Index Per Article: 6.7] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/15/2015] [Revised: 08/26/2015] [Accepted: 08/28/2015] [Indexed: 11/26/2022]
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Hennig J, Warner LR, Simon B, Geerlof A, Mackereth CD, Sattler M. Structural Analysis of Protein-RNA Complexes in Solution Using NMR Paramagnetic Relaxation Enhancements. Methods Enzymol 2015; 558:333-362. [PMID: 26068746 DOI: 10.1016/bs.mie.2015.02.006] [Citation(s) in RCA: 15] [Impact Index Per Article: 1.7] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/12/2022]
Abstract
Biological activity in the cell is predominantly mediated by large multiprotein and protein-nucleic acid complexes that act together to ensure functional fidelity. Nuclear magnetic resonance (NMR) spectroscopy is the only method that can provide information for high-resolution three-dimensional structures and the conformational dynamics of these complexes in solution. Mapping of binding interfaces and molecular interactions along with the characterization of conformational dynamics is possible for very large protein complexes. In contrast, de novo structure determination by NMR becomes very time consuming and difficult for protein complexes larger than 30 kDa as data are noisy and sparse. Fortunately, high-resolution structures are often available for individual domains or subunits of a protein complex and thus sparse data can be used to define their arrangement and dynamics within the assembled complex. In these cases, NMR can therefore be efficiently combined with complementary solution techniques, such as small-angle X-ray or neutron scattering, to provide a comprehensive description of the structure and dynamics of protein complexes in solution. Particularly useful are NMR-derived paramagnetic relaxation enhancements (PREs), which provide long-range distance restraints (ca. 20Å) for structural analysis of large complexes and also report on conformational dynamics in solution. Here, we describe the use of PREs from sample production to structure calculation, focusing on protein-RNA complexes. On the basis of recent examples from our own research, we demonstrate the utility, present protocols, and discuss potential pitfalls when using PREs for studying the structure and dynamic features of protein-RNA complexes.
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Affiliation(s)
- Janosch Hennig
- Institute of Structural Biology, Helmholtz Zentrum München, Oberschleißheim, Germany; Center for Integrated Protein Science Munich at Biomolecular NMR Spectroscopy, Department Chemie, Technische Universität München, Garching, Germany
| | - Lisa R Warner
- Institute of Structural Biology, Helmholtz Zentrum München, Oberschleißheim, Germany; Center for Integrated Protein Science Munich at Biomolecular NMR Spectroscopy, Department Chemie, Technische Universität München, Garching, Germany
| | - Bernd Simon
- European Molecular Biology Laboratory, Heidelberg, Germany
| | - Arie Geerlof
- Institute of Structural Biology, Helmholtz Zentrum München, Oberschleißheim, Germany; Center for Integrated Protein Science Munich at Biomolecular NMR Spectroscopy, Department Chemie, Technische Universität München, Garching, Germany
| | - Cameron D Mackereth
- Institut Européen de Chimie et Biologie, IECB, Univ. Bordeaux, Pessac, France; Inserm, U869, ARNA Laboratory, Bordeaux, France
| | - Michael Sattler
- Institute of Structural Biology, Helmholtz Zentrum München, Oberschleißheim, Germany; Center for Integrated Protein Science Munich at Biomolecular NMR Spectroscopy, Department Chemie, Technische Universität München, Garching, Germany.
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Dias DM, Ciulli A. NMR approaches in structure-based lead discovery: recent developments and new frontiers for targeting multi-protein complexes. PROGRESS IN BIOPHYSICS AND MOLECULAR BIOLOGY 2014; 116:101-12. [PMID: 25175337 PMCID: PMC4261069 DOI: 10.1016/j.pbiomolbio.2014.08.012] [Citation(s) in RCA: 47] [Impact Index Per Article: 4.7] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Figures] [Subscribe] [Scholar Register] [Received: 04/16/2014] [Revised: 08/06/2014] [Accepted: 08/19/2014] [Indexed: 01/08/2023]
Abstract
Nuclear magnetic resonance (NMR) spectroscopy is a pivotal method for structure-based and fragment-based lead discovery because it is one of the most robust techniques to provide information on protein structure, dynamics and interaction at an atomic level in solution. Nowadays, in most ligand screening cascades, NMR-based methods are applied to identify and structurally validate small molecule binding. These can be high-throughput and are often used synergistically with other biophysical assays. Here, we describe current state-of-the-art in the portfolio of available NMR-based experiments that are used to aid early-stage lead discovery. We then focus on multi-protein complexes as targets and how NMR spectroscopy allows studying of interactions within the high molecular weight assemblies that make up a vast fraction of the yet untargeted proteome. Finally, we give our perspective on how currently available methods could build an improved strategy for drug discovery against such challenging targets.
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Affiliation(s)
- David M Dias
- Department of Chemistry, University of Cambridge, Cambridge, CB2 1EW, UK
| | - Alessio Ciulli
- College of Life Sciences, Division of Biological Chemistry and Drug Discovery, University of Dundee, Dow Street, DD1 5EH, Dundee, UK.
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