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Wojciechowska I, Mukherjee T, Knox-Brown P, Hu X, Khosla A, Subedi B, Ahmad B, Mathews GL, Panagakis AA, Thompson KA, Peery ST, Szlachetko J, Thalhammer A, Hincha DK, Skirycz A, Schrick K. Arabidopsis PROTODERMAL FACTOR2 binds lysophosphatidylcholines and transcriptionally regulates phospholipid metabolism. THE NEW PHYTOLOGIST 2024. [PMID: 38952028 DOI: 10.1111/nph.19917] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Grants] [Track Full Text] [Subscribe] [Scholar Register] [Received: 01/14/2024] [Accepted: 05/06/2024] [Indexed: 07/03/2024]
Abstract
Plant homeodomain leucine zipper IV (HD-Zip IV) transcription factors (TFs) contain an evolutionarily conserved steroidogenic acute regulatory protein (StAR)-related lipid transfer (START) domain. While the START domain is required for TF activity, its presumed role as a lipid sensor is not clear. Here we used tandem affinity purification from Arabidopsis cell cultures to demonstrate that PROTODERMAL FACTOR2 (PDF2), a representative member that controls epidermal differentiation, recruits lysophosphatidylcholines (LysoPCs) in a START-dependent manner. Microscale thermophoresis assays confirmed that a missense mutation in a predicted ligand contact site reduces lysophospholipid binding. We additionally found that PDF2 acts as a transcriptional regulator of phospholipid- and phosphate (Pi) starvation-related genes and binds to a palindromic octamer with consensus to a Pi response element. Phospholipid homeostasis and elongation growth were altered in pdf2 mutants according to Pi availability. Cycloheximide chase experiments revealed a role for START in maintaining protein levels, and Pi starvation resulted in enhanced protein destabilization, suggesting a mechanism by which lipid binding controls TF activity. We propose that the START domain serves as a molecular sensor for membrane phospholipid status in the epidermis. Our data provide insights toward understanding how the lipid metabolome integrates Pi availability with gene expression.
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Affiliation(s)
| | - Thiya Mukherjee
- Division of Biology, Kansas State University, Manhattan, KS, 66506, USA
- Molecular, Cellular and Developmental Biology, Kansas State University, Manhattan, KS, 66506, USA
- Donald Danforth Plant Science Center, Olivette, MO, 63132, USA
| | | | - Xueyun Hu
- Division of Biology, Kansas State University, Manhattan, KS, 66506, USA
- Joint International Research Laboratory of Agriculture and Agri-Product Safety of Ministry of Education of China, Yangzhou University, Yangzhou, 225009, China
| | - Aashima Khosla
- Division of Biology, Kansas State University, Manhattan, KS, 66506, USA
- Molecular, Cellular and Developmental Biology, Kansas State University, Manhattan, KS, 66506, USA
| | - Bibek Subedi
- Division of Biology, Kansas State University, Manhattan, KS, 66506, USA
- Molecular, Cellular and Developmental Biology, Kansas State University, Manhattan, KS, 66506, USA
| | - Bilal Ahmad
- Division of Biology, Kansas State University, Manhattan, KS, 66506, USA
- Molecular, Cellular and Developmental Biology, Kansas State University, Manhattan, KS, 66506, USA
| | - Graham L Mathews
- Division of Biology, Kansas State University, Manhattan, KS, 66506, USA
| | | | - Kyle A Thompson
- Division of Biology, Kansas State University, Manhattan, KS, 66506, USA
| | - Sophie T Peery
- Division of Biology, Kansas State University, Manhattan, KS, 66506, USA
| | - Jagoda Szlachetko
- Max Planck Institute of Molecular Plant Physiology, 14476, Potsdam, Germany
| | - Anja Thalhammer
- Physical Biochemistry, University of Potsdam, 14476, Potsdam, Germany
| | - Dirk K Hincha
- Max Planck Institute of Molecular Plant Physiology, 14476, Potsdam, Germany
| | - Aleksandra Skirycz
- Max Planck Institute of Molecular Plant Physiology, 14476, Potsdam, Germany
- Department of Biochemistry and Molecular Biology, Michigan State University, East Lansing, MI, 48823, USA
| | - Kathrin Schrick
- Division of Biology, Kansas State University, Manhattan, KS, 66506, USA
- Molecular, Cellular and Developmental Biology, Kansas State University, Manhattan, KS, 66506, USA
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Zamalutdinova SV, Isaeva LV, Zamalutdinov AV, Faletrov YV, Rubtsov MA, Novikova LA. Analysis of Activity of Human Steroidogenic Acute Regulatory Protein (STARD1) Expressed in Escherichia coli Cells. BIOCHEMISTRY. BIOKHIMIIA 2022; 87:1015-1020. [PMID: 36180996 DOI: 10.1134/s0006297922090127] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 07/17/2022] [Revised: 08/08/2022] [Accepted: 08/19/2022] [Indexed: 06/16/2023]
Abstract
One of the main obstacles to the successful use of Escherichia coli cells for steroid transformation in biotechnological processes is inefficient transport of steroid substrates into the cells. Here, we tested the possibility of using human cholesterol transfer protein STARD1 (steroidogenic acute regulatory protein) to increase the efficiency of steroid uptake by bacterial cells. Genetic constructs were obtained for the synthesis in E. coli BL21 (DE3) cells of a truncated version of STARD1 containing protein functional domain (residues 66-285) and STARD1 (66-285)-GFP fusion protein, both carrying bacterial periplasmic targeting sequence pelB at the N-terminus. Analysis of preparations of E. coli/pET22b/STARD1-GFP cells by fluorimetry and Western blotting confirmed that the used expression system ensured the synthesis of the heterologous protein. Using fluorescence spectroscopy, it was demonstrated that the presence of STARD1 in the cells increased the efficiency of assimilation of NBD-labeled cholesterol analogues by E. coli/pET22b/STARD1 cells 1.3-1.6 times (p < 0.05) compared to the wild-type cells, thus demonstrating that human STARD1 exhibits its functional activity in bacterial cells. This opens prospects for optimizing and using a fundamentally new approach to increase the efficiency of steroid uptake by cells - the inclusion of a specific carrier protein in the cell membrane, which can expand the arsenal of methods used to obtain strains of microorganisms for synthesis.
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Affiliation(s)
| | - Ludmila V Isaeva
- Belozersky Institute of Physico-Chemical Biology, Lomonosov Moscow State University, Moscow, 119234, Russia
| | | | - Yaroslav V Faletrov
- Research Institute for Physical Chemical Problems, Belarusian State University, Minsk, 220030, Belarus.
| | - Mikhail A Rubtsov
- Faculty of Biology, Lomonosov Moscow State University, Moscow, 119234, Russia.
- Sechenov First Moscow State Medical University, Moscow, 119991, Russia
| | - Ludmila A Novikova
- Belozersky Institute of Physico-Chemical Biology, Lomonosov Moscow State University, Moscow, 119234, Russia.
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3
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Slonimskiy YB, Egorkin NA, Ashikhmin AA, Friedrich T, Maksimov EG, Sluchanko NN. Reconstitution of the functional carotenoid-binding protein from silkworm in E. coli. Int J Biol Macromol 2022; 214:664-671. [PMID: 35753519 DOI: 10.1016/j.ijbiomac.2022.06.135] [Citation(s) in RCA: 5] [Impact Index Per Article: 2.5] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/14/2022] [Revised: 06/02/2022] [Accepted: 06/20/2022] [Indexed: 12/16/2022]
Abstract
Natural water-soluble carotenoproteins are promising antioxidant nanocarriers for biomedical applications. The Carotenoid-Binding Protein from silkworm Bombyx mori (BmCBP) is responsible for depositing carotenoids in cocoons. This determines the silk coloration, which is relevant for sericulture for four thousand years. While BmCBP function is well-characterized by molecular genetics, its structure and carotenoid-binding mechanism remain to be studied. To facilitate this, here we report on successful production of soluble BmCBP in Escherichia coli, its purification and characterization. According to CD spectroscopy and SEC-MALS, this protein folds into a ~ 27-kDa monomer capable of dose-dependent binding of lutein, a natural BmCBP ligand, in vitro. Binding leads to a >10 nm red-shift of the carotenoid absorbance and quenches tryptophan fluorescence of BmCBP. Using zeaxanthin, a close lutein isomer that can be stably produced in engineered E.coli strains, we successfully reconstitute the BmCBP holoform and characterize its properties. While BmCBP successfully matures into the holoform, BmCBP-zeaxanthin complexes are contaminated by the apoform. We demonstrate that the yield of the holoform can be increased by adding bovine serum albumin during cell lysis and that the remaining BmCBP apoform is efficiently removed using hydroxyapatite chromatography. Bacterial production of BmCBP paves the way for its structural studies and applications.
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Affiliation(s)
- Yury B Slonimskiy
- A.N. Bach Institute of Biochemistry, Federal Research Center of Biotechnology of the Russian Academy of Sciences, 119071 Moscow, Russian Federation
| | - Nikita A Egorkin
- A.N. Bach Institute of Biochemistry, Federal Research Center of Biotechnology of the Russian Academy of Sciences, 119071 Moscow, Russian Federation
| | - Aleksandr A Ashikhmin
- Federal Research Center Pushchino Scientific Center Russian Academy of Sciences, Institute of Basic Biological Problems of Russian Academy of Sciences, Institutskaya, 2, Pushchino, Moscow 142290, Russia
| | - Thomas Friedrich
- Technical University of Berlin, Institute of Chemistry PC 14, Straße des 17. Juni 135, D-10623 Berlin, Germany
| | - Eugene G Maksimov
- M.V. Lomonosov Moscow State University, Faculty of Biology, 119991 Moscow, Russian Federation
| | - Nikolai N Sluchanko
- A.N. Bach Institute of Biochemistry, Federal Research Center of Biotechnology of the Russian Academy of Sciences, 119071 Moscow, Russian Federation.
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4
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Sluchanko NN. Recent advances in structural studies of 14-3-3 protein complexes. ADVANCES IN PROTEIN CHEMISTRY AND STRUCTURAL BIOLOGY 2022; 130:289-324. [PMID: 35534110 DOI: 10.1016/bs.apcsb.2021.12.004] [Citation(s) in RCA: 11] [Impact Index Per Article: 5.5] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Subscribe] [Scholar Register] [Indexed: 11/19/2022]
Abstract
Being phosphopeptide-binding hubs, 14-3-3 proteins coordinate multiple cellular processes in eukaryotes, including the regulation of apoptosis, cell cycle, ion channels trafficking, transcription, signal transduction, and hormone biosynthesis. Forming constitutive α-helical dimers, 14-3-3 proteins predominantly recognize specifically phosphorylated Ser/Thr sites within their partners; this generally stabilizes phosphotarget conformation and affects its activity, intracellular distribution, dephosphorylation, degradation and interactions with other proteins. Not surprisingly, 14-3-3 complexes are involved in the development of a range of diseases and are considered promising drug targets. The wide interactome of 14-3-3 proteins encompasses hundreds of different phosphoproteins, for many of which the interaction is well-documented in vitro and in vivo but lack the structural data that would help better understand underlying regulatory mechanisms and develop new drugs. Despite obtaining structural information on 14-3-3 complexes is still lagging behind the research of 14-3-3 interactions on a proteome-wide scale, recent works provided some advances, including methodological improvements and accumulation of new interesting structural data, that are discussed in this review.
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Affiliation(s)
- Nikolai N Sluchanko
- A.N. Bach Institute of Biochemistry, Federal Research Center "Fundamentals of Biotechnology" of the Russian Academy of Sciences, Moscow, Russian Federation.
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5
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Tugaeva KV, Titterington J, Sotnikov DV, Maksimov EG, Antson AA, Sluchanko NN. Molecular basis for the recognition of steroidogenic acute regulatory protein by the 14‐3‐3 protein family. FEBS J 2020; 287:3944-3966. [DOI: 10.1111/febs.15474] [Citation(s) in RCA: 17] [Impact Index Per Article: 4.3] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/14/2020] [Revised: 05/26/2020] [Accepted: 07/01/2020] [Indexed: 11/30/2022]
Affiliation(s)
- Kristina V. Tugaeva
- Federal Research Center of Biotechnology of the Russian Academy of Sciences A.N. Bach Institute of Biochemistry Moscow Russia
- Department of Biochemistry School of Biology M.V. Lomonosov Moscow State University Russia
| | - James Titterington
- York Structural Biology Laboratory Department of Chemistry University of York UK
| | - Dmitriy V. Sotnikov
- Federal Research Center of Biotechnology of the Russian Academy of Sciences A.N. Bach Institute of Biochemistry Moscow Russia
| | - Eugene G. Maksimov
- Federal Research Center of Biotechnology of the Russian Academy of Sciences A.N. Bach Institute of Biochemistry Moscow Russia
- Department of Biophysics School of Biology M.V. Lomonosov Moscow State University Russia
| | - Alfred A. Antson
- York Structural Biology Laboratory Department of Chemistry University of York UK
| | - Nikolai N. Sluchanko
- Federal Research Center of Biotechnology of the Russian Academy of Sciences A.N. Bach Institute of Biochemistry Moscow Russia
- Department of Biophysics School of Biology M.V. Lomonosov Moscow State University Russia
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TMT-based quantitative proteomic analysis of cumulus cells derived from vitrified porcine immature oocytes following in vitro maturation. Theriogenology 2020; 152:8-17. [PMID: 32361306 DOI: 10.1016/j.theriogenology.2020.04.025] [Citation(s) in RCA: 12] [Impact Index Per Article: 3.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/09/2020] [Revised: 04/16/2020] [Accepted: 04/18/2020] [Indexed: 12/26/2022]
Abstract
As the immature oocytes are submitted to cryopreservation, their surrounding cumulus cells (CCs) will inevitably suffer, which may have some adverse effects on subsequent oocyte maturation and development. So far, little is known about the molecular differences in CCs of immature oocytes after vitrification. The aim of this study therefore was to analyze the protein profile of CCs derived from vitrified porcine immature oocytes following in vitro maturation, using TMT-based quantitative proteomic approach. A total of 5910 proteins were identified, and 88 of them presented significant difference, with 46 up-regulated and 42 down-regulated proteins. Gene Ontology enrichment analysis revealed that cell cycle phase transition, mitotic cell cycle phase transition, positive regulation of cell differentiation and regulation of oogenesis were significantly down-regulated within the biological process. After Kyoto Encyclopedia of Genes and Genomes pathway analysis, some up-regulated proteins were significantly enriched in TGF-beta signaling pathway and 4 pathways related to steroid hormones. Furthermore, 10 selected proteins were quantified and verified by a parallel reaction monitoring technique, indicating a high reliability of the TMT results. In conclusion, vitrification affects protein profile of CCs as well as their biological functions, which will offer a new perspective to understand the reasons for decline in maturation quality of vitrified immature oocytes.
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Faletrov YV, Efimova VS, Horetski MS, Tugaeva KV, Frolova NS, Lin Q, Isaeva LV, Rubtsov MA, Sluchanko NN, Novikova LA, Shkumatov VM. New 20-hydroxycholesterol-like compounds with fluorescent NBD or alkyne labels: Synthesis, in silico interactions with proteins and uptake by yeast cells. Chem Phys Lipids 2019; 227:104850. [PMID: 31836520 DOI: 10.1016/j.chemphyslip.2019.104850] [Citation(s) in RCA: 8] [Impact Index Per Article: 1.6] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/20/2019] [Revised: 12/03/2019] [Accepted: 12/04/2019] [Indexed: 01/07/2023]
Abstract
20-hydroxycholesterol is a signaling oxysterol with immunomodulating functions and, thus, structural analogues with reporter capabilities could be useful for studying and modulating the cellular processes concerned. We have synthesized three new 20-hydroxycholesterol-like pregn-5-en-3β-ol derivatives with fluorescent 7-nitrobenzofurazan (NBD) or Raman-sensitive alkyne labels in their side-chains. In silico computations demonstrated the compounds possess good membrane permeability and can bind within active sites of known 20-hydroxycholesterol targets (e.g. Smoothened and yeast Osh4) and some other sterol-binding proteins (human LXRβ and STARD1; yeast START-kins Lam4S2 and Lam2S2). Having found good predicted membrane permeability and binding to some yeast proteins, we tested the compounds on microorganisms. Fluorescent microscopy indicated the uptake of the steroids by both Saccharomyces cerevisiae and Yarrowia lipolytica, whereas only S. cerevisiae demonstrated conversion of the compounds into 3-O-acetates, likely because 3-O-acetyltransferase Atf2p is present only in its genome. The new compounds provide new options to study the uptake, intracellular distribution and metabolism of sterols in yeast cells as well as might be used as ligands for sterol-binding proteins.
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Affiliation(s)
- Yaroslav V Faletrov
- Research Institute for Physical Chemical Problems, Belarusian State University, Leningradskaya str. 14, Minsk, Belarus; Faculty of Chemistry, Belarusian State University, Leningradskaya str. 14, Minsk, Belarus
| | - Vera S Efimova
- Belozersky Institute of Physico-Chemical Biology, M.V. Lomonosov Moscow State University, Leninskie Gory, 1/40, 119234 Moscow, Russia; Faculty of Biology, M.V. Lomonosov Moscow State University, Leninskie Gory, 1/12, 119234 Moscow, Russia
| | - Matvey S Horetski
- Research Institute for Physical Chemical Problems, Belarusian State University, Leningradskaya str. 14, Minsk, Belarus; Faculty of Chemistry, Belarusian State University, Leningradskaya str. 14, Minsk, Belarus
| | - Kristina V Tugaeva
- A.N. Bach Institute of Biochemistry, Federal Research Center of Biotechnology of the Russian Academy of Sciences, Leninsky Pr. 33, Moscow, 119071, Russia; Faculty of Biology, M.V. Lomonosov Moscow State University, Leninskie Gory, 1/12, 119234 Moscow, Russia
| | - Nina S Frolova
- Research Institute for Physical Chemical Problems, Belarusian State University, Leningradskaya str. 14, Minsk, Belarus
| | - Quingquing Lin
- Faculty of Chemistry, Belarusian State University, Leningradskaya str. 14, Minsk, Belarus
| | - Ludmila V Isaeva
- Belozersky Institute of Physico-Chemical Biology, M.V. Lomonosov Moscow State University, Leninskie Gory, 1/40, 119234 Moscow, Russia
| | - Mikhail A Rubtsov
- Faculty of Biology, M.V. Lomonosov Moscow State University, Leninskie Gory, 1/12, 119234 Moscow, Russia; Sechenov First Moscow State Medical University (Sechenov University), Moscow, 119991, Russia; Lomonosov Moscow State University, Laboratoire Franco-Russe de Recherches en Oncologie, Moscow, 119234, Russia
| | - Nikolai N Sluchanko
- A.N. Bach Institute of Biochemistry, Federal Research Center of Biotechnology of the Russian Academy of Sciences, Leninsky Pr. 33, Moscow, 119071, Russia; Faculty of Biology, M.V. Lomonosov Moscow State University, Leninskie Gory, 1/12, 119234 Moscow, Russia
| | - Ludmila A Novikova
- Belozersky Institute of Physico-Chemical Biology, M.V. Lomonosov Moscow State University, Leninskie Gory, 1/40, 119234 Moscow, Russia
| | - Vladimir M Shkumatov
- Research Institute for Physical Chemical Problems, Belarusian State University, Leningradskaya str. 14, Minsk, Belarus; Faculty of Chemistry, Belarusian State University, Leningradskaya str. 14, Minsk, Belarus.
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8
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Tugaeva KV, Faletrov YV, Allakhverdiev ES, Shkumatov VM, Maksimov EG, Sluchanko NN. Effect of the NBD-group position on interaction of fluorescently-labeled cholesterol analogues with human steroidogenic acute regulatory protein STARD1. Biochem Biophys Res Commun 2018; 497:58-64. [DOI: 10.1016/j.bbrc.2018.02.014] [Citation(s) in RCA: 7] [Impact Index Per Article: 1.2] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/23/2018] [Accepted: 02/02/2018] [Indexed: 10/18/2022]
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9
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Sluchanko NN, Tugaeva KV, Greive SJ, Antson AA. Chimeric 14-3-3 proteins for unraveling interactions with intrinsically disordered partners. Sci Rep 2017; 7:12014. [PMID: 28931924 PMCID: PMC5607241 DOI: 10.1038/s41598-017-12214-9] [Citation(s) in RCA: 22] [Impact Index Per Article: 3.1] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/14/2017] [Accepted: 09/05/2017] [Indexed: 01/01/2023] Open
Abstract
In eukaryotes, several “hub” proteins integrate signals from different interacting partners that bind through intrinsically disordered regions. The 14-3-3 protein hub, which plays wide-ranging roles in cellular processes, has been linked to numerous human disorders and is a promising target for therapeutic intervention. Partner proteins usually bind via insertion of a phosphopeptide into an amphipathic groove of 14-3-3. Structural plasticity in the groove generates promiscuity allowing accommodation of hundreds of different partners. So far, accurate structural information has been derived for only a few 14-3-3 complexes with phosphopeptide-containing proteins and a variety of complexes with short synthetic peptides. To further advance structural studies, here we propose a novel approach based on fusing 14-3-3 proteins with the target partner peptide sequences. Such chimeric proteins are easy to design, express, purify and crystallize. Peptide attachment to the C terminus of 14-3-3 via an optimal linker allows its phosphorylation by protein kinase A during bacterial co-expression and subsequent binding at the amphipathic groove. Crystal structures of 14-3-3 chimeras with three different peptides provide detailed structural information on peptide-14-3-3 interactions. This simple but powerful approach, employing chimeric proteins, can reinvigorate studies of 14-3-3/phosphoprotein assemblies, including those with challenging low-affinity partners, and may facilitate the design of novel biosensors.
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Affiliation(s)
- Nikolai N Sluchanko
- A.N. Bach Institute of Biochemistry, Federal Research Center "Fundamentals of Biotechnology" of the Russian Academy of Sciences, 119071, Moscow, Russian Federation. .,Department of biophysics, School of Biology, Moscow State University, 119991, Moscow, Russian Federation.
| | - Kristina V Tugaeva
- A.N. Bach Institute of Biochemistry, Federal Research Center "Fundamentals of Biotechnology" of the Russian Academy of Sciences, 119071, Moscow, Russian Federation.,Department of biochemistry, School of Biology, Moscow State University, 119991, Moscow, Russian Federation
| | - Sandra J Greive
- York Structural Biology Laboratory, Department of Chemistry, University of York, York, YO10 5DD, United Kingdom
| | - Alfred A Antson
- York Structural Biology Laboratory, Department of Chemistry, University of York, York, YO10 5DD, United Kingdom
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10
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Moldenhauer M, Sluchanko NN, Buhrke D, Zlenko DV, Tavraz NN, Schmitt FJ, Hildebrandt P, Maksimov EG, Friedrich T. Assembly of photoactive orange carotenoid protein from its domains unravels a carotenoid shuttle mechanism. PHOTOSYNTHESIS RESEARCH 2017; 133:327-341. [PMID: 28213741 DOI: 10.1007/s11120-017-0353-3] [Citation(s) in RCA: 34] [Impact Index Per Article: 4.9] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 02/01/2017] [Accepted: 02/07/2017] [Indexed: 05/15/2023]
Abstract
The photoswitchable orange carotenoid protein (OCP) is indispensable for cyanobacterial photoprotection by quenching phycobilisome fluorescence upon photoconversion from the orange OCPO to the red OCPR form. Cyanobacterial genomes frequently harbor, besides genes for orange carotenoid proteins (OCPs), several genes encoding homologs of OCP's N- or C-terminal domains (NTD, CTD). Unlike the well-studied NTD homologs, called Red Carotenoid Proteins (RCPs), the role of CTD homologs remains elusive. We show how OCP can be reassembled from its functional domains. Expression of Synechocystis OCP-CTD in carotenoid-producing Escherichia coli yielded violet-colored proteins, which, upon mixing with the RCP-apoprotein, produced an orange-like photoswitchable form that further photoconverted into a species that quenches phycobilisome fluorescence and is spectroscopically indistinguishable from RCP, thus demonstrating a unique carotenoid shuttle mechanism. Spontaneous carotenoid transfer also occurs between canthaxanthin-coordinating OCP-CTD and the OCP apoprotein resulting in formation of photoactive OCP. The OCP-CTD itself is a novel, dimeric carotenoid-binding protein, which can coordinate canthaxanthin and zeaxanthin, effectively quenches singlet oxygen and interacts with the Fluorescence Recovery Protein. These findings assign physiological roles to the multitude of CTD homologs in cyanobacteria and explain the evolutionary process of OCP formation.
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Affiliation(s)
- Marcus Moldenhauer
- Institute of Chemistry PC 14, Technical University of Berlin, Straße des 17. Juni 135, 10623, Berlin, Germany
| | - Nikolai N Sluchanko
- A.N. Bach Institute of Biochemistry, Federal Research Center "Fundamentals of Biotechnology", Russian Academy of Sciences, Moscow, Russian Federation, 119071
- Department of Biophysics, Faculty of Biology, M.V. Lomonosov Moscow State University, Moscow, Russian Federation, 119992
| | - David Buhrke
- Institute of Chemistry PC 14, Technical University of Berlin, Straße des 17. Juni 135, 10623, Berlin, Germany
| | - Dmitry V Zlenko
- Department of Biophysics, Faculty of Biology, M.V. Lomonosov Moscow State University, Moscow, Russian Federation, 119992
| | - Neslihan N Tavraz
- Institute of Chemistry PC 14, Technical University of Berlin, Straße des 17. Juni 135, 10623, Berlin, Germany
| | - Franz-Josef Schmitt
- Institute of Chemistry PC 14, Technical University of Berlin, Straße des 17. Juni 135, 10623, Berlin, Germany
| | - Peter Hildebrandt
- Institute of Chemistry PC 14, Technical University of Berlin, Straße des 17. Juni 135, 10623, Berlin, Germany
| | - Eugene G Maksimov
- Department of Biophysics, Faculty of Biology, M.V. Lomonosov Moscow State University, Moscow, Russian Federation, 119992.
| | - Thomas Friedrich
- Institute of Chemistry PC 14, Technical University of Berlin, Straße des 17. Juni 135, 10623, Berlin, Germany.
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11
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Sluchanko NN, Tugaeva KV, Maksimov EG. Solution structure of human steroidogenic acute regulatory protein STARD1 studied by small-angle X-ray scattering. Biochem Biophys Res Commun 2017; 489:445-450. [DOI: 10.1016/j.bbrc.2017.05.167] [Citation(s) in RCA: 7] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/19/2017] [Accepted: 05/28/2017] [Indexed: 12/11/2022]
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12
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Cai R, Chen C, Li Y, Sun K, Zhou F, Chen K, Jia H. Improved soluble bacterial expression and properties of the recombinant flavonoid glucosyltransferase UGT73G1 from Allium cepa. J Biotechnol 2017. [PMID: 28627388 DOI: 10.1016/j.jbiotec.2017.06.011] [Citation(s) in RCA: 8] [Impact Index Per Article: 1.1] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/12/2023]
Abstract
Glycosylation of quercetin using flavonol-specific glycosyltransferases offers an alternate method for isoquercitrin production. Obtaining sufficient quantities of bioactive enzymes is an important prerequisite for highly effective biocatalysis and biotransformation. In this study, a codon-optimized gene for the flavonoid glucosyltransferase UGT73G1 from Allium cepa was heterologously expressed in the preferred prokaryotic expression host Escherichia coli. By combining expression as a fusion protein with 6-histidine tags with coexpression with molecular chaperones, increased soluble expression of UGT73G1 was achieved in E. coli. Two-terminal 6-histidine tags contributed more to the expression than molecular chaperones, as demonstrated by comparison of specific activities in crude extracts obtained from the recombinant E. coli strains. Studies of the catalytic properties of purified UGT73G1 indicated that its activity was significantly promoted by Mn2+ and Mg2+, while it was strongly inhibited by Cu2+. These expression strategies enhanced the solubility and activity of the overexpressed protein and enabled characterization of this plant-derived glucosyltransferase expressed in a prokaryotic host.
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Affiliation(s)
- Ruxin Cai
- College of Biotechnology and Pharmaceutical Engineering, Nanjing Tech University, Nanjing 211816, China
| | - Caihong Chen
- College of Biotechnology and Pharmaceutical Engineering, Nanjing Tech University, Nanjing 211816, China
| | - Yan Li
- College of Biotechnology and Pharmaceutical Engineering, Nanjing Tech University, Nanjing 211816, China; Yichang Key Laboratory of Biocatalysis, China Three Gorges University, Yichang 443002, China.
| | - Kaiyan Sun
- College of Biotechnology and Pharmaceutical Engineering, Nanjing Tech University, Nanjing 211816, China
| | - Fangfang Zhou
- College of Biotechnology and Pharmaceutical Engineering, Nanjing Tech University, Nanjing 211816, China
| | - Kequan Chen
- College of Biotechnology and Pharmaceutical Engineering, Nanjing Tech University, Nanjing 211816, China
| | - Honghua Jia
- College of Biotechnology and Pharmaceutical Engineering, Nanjing Tech University, Nanjing 211816, China
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13
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Bacterial co-expression of human Tau protein with protein kinase A and 14-3-3 for studies of 14-3-3/phospho-Tau interaction. PLoS One 2017; 12:e0178933. [PMID: 28575131 PMCID: PMC5456370 DOI: 10.1371/journal.pone.0178933] [Citation(s) in RCA: 25] [Impact Index Per Article: 3.6] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/19/2016] [Accepted: 05/22/2017] [Indexed: 11/19/2022] Open
Abstract
Abundant regulatory 14-3-3 proteins have an extremely wide interactome and coordinate multiple cellular events via interaction with specifically phosphorylated partner proteins. Notwithstanding the key role of 14-3-3/phosphotarget interactions in many physiological and pathological processes, they are dramatically underexplored. Here, we focused on the 14-3-3 interaction with human Tau protein associated with the development of several neurodegenerative disorders, including Alzheimer’s and Parkinson’s diseases. Among many known phosphorylation sites within Tau, protein kinase A (PKA) phosphorylates several key residues of Tau and induces its tight interaction with 14-3-3 proteins. However, the stoichiometry and mechanism of 14-3-3 interaction with phosphorylated Tau (pTau) are not clearly elucidated. In this work, we describe a simple bacterial co-expression system aimed to facilitate biochemical and structural studies on the 14-3-3/pTau interaction. We show that dual co-expression of human fetal Tau with PKA in Escherichia coli results in multisite Tau phosphorylation including also naturally occurring sites which were not previously considered in the context of 14-3-3 binding. Tau protein co-expressed with PKA displays tight functional interaction with 14-3-3 isoforms of a different type. Upon triple co-expression with 14-3-3 and PKA, Tau protein could be co-purified with 14-3-3 and demonstrates complex which is similar to that formed in vitro between individual 14-3-3 and pTau obtained from dual co-expression. Although used in this study for the specific case of the previously known 14-3-3/pTau interaction, our co-expression system may be useful to study of other selected 14-3-3/phosphotarget interactions and for validations of 14-3-3 complexes identified by other methods.
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