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Pankratenko AV, Atabekova AK, Morozov SY, Solovyev AG. Membrane Contacts in Plasmodesmata: Structural Components and Their Functions. BIOCHEMISTRY (MOSCOW) 2020; 85:531-544. [DOI: 10.1134/s0006297920050028] [Citation(s) in RCA: 5] [Impact Index Per Article: 1.3] [Reference Citation Analysis] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 12/11/2022]
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Morozov SY, Solovyev AG. Emergence of Intronless Evolutionary Forms of Stress Response Genes: Possible Relation to Terrestrial Adaptation of Green Plants. FRONTIERS IN PLANT SCIENCE 2019; 10:83. [PMID: 30792726 PMCID: PMC6374339 DOI: 10.3389/fpls.2019.00083] [Citation(s) in RCA: 5] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Key Words] [Track Full Text] [Subscribe] [Scholar Register] [Received: 10/15/2018] [Accepted: 01/21/2019] [Indexed: 05/18/2023]
Affiliation(s)
- Sergey Y. Morozov
- A. N. Belozersky Institute of Physico-Chemical Biology, Moscow State University, Moscow, Russia
- Department of Virology, Biological Faculty, Moscow State University, Moscow, Russia
- *Correspondence: Sergey Y. Morozov
| | - Andrey G. Solovyev
- A. N. Belozersky Institute of Physico-Chemical Biology, Moscow State University, Moscow, Russia
- Department of Virology, Biological Faculty, Moscow State University, Moscow, Russia
- Institute of Molecular Medicine, Sechenov First Moscow State Medical University, Moscow, Russia
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Atabekova AK, Lazareva EA, Strelkova OS, Solovyev AG, Morozov SY. Mechanical stress-induced subcellular re-localization of N-terminally truncated tobacco Nt-4/1 protein. Biochimie 2018; 144:98-107. [PMID: 29097279 DOI: 10.1016/j.biochi.2017.10.020] [Citation(s) in RCA: 3] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/09/2017] [Accepted: 10/25/2017] [Indexed: 01/22/2023]
Abstract
The Nicotiana tabacum 4/1 protein (Nt-4/1) of unknown function expressed in plant vasculature has been shown to localize to cytoplasmic bodies associated with endoplasmic reticulum. Here, we analyzed molecular interactions of an Nt-4/1 mutant with a deletion of 90 N-terminal amino acid residues (Nt-4/1d90) having a diffuse GFP-like localization. Upon transient co-expression with VAP27, a membrane protein known to localize to the ER, ER-plasma membrane contact sites and plasmodesmata, Nt-4/1d90 was concentrated around the cortical ER tubules, forming a network matching the shape of the cortical ER. Additionally, in response to mechanical stress, Nt-4/1d90 was re-localized to small spherical bodies, whereas the subcellular localization of VAP27 remained essentially unaffected. The Nt-4/1d90-containing bodies associated with microtubules, which underwent noticeable bundling under the conditions of mechanical stress. The Nt-4/1d90 re-localization to spherical bodies could also be induced by incubation at an elevated temperature, although under heat shock conditions the re-localization was less efficient and incomplete. An Nt-4/1d90 mutant, which had phosphorylation-mimicking mutations in a predicted cluster of four potentially phosphorylated residues, was found to both inefficiently re-localize to spherical bodies and tend to revert back to the initial diffuse localization. The presented data show that Nt-4/1 has a potential for response to stresses that is manifested by its deletion mutant Nt-4/1d90, and this response can be mediated by protein dephosphorylation.
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Affiliation(s)
- Anastasia K Atabekova
- Department of Virology, Biological Faculty, Moscow State University, Moscow 119234, Russia
| | - Ekaterina A Lazareva
- Department of Virology, Biological Faculty, Moscow State University, Moscow 119234, Russia
| | - Olga S Strelkova
- Belozersky Institute of Physico-Chemical Biology, Moscow State University, Moscow 119992, Russia
| | - Andrey G Solovyev
- Belozersky Institute of Physico-Chemical Biology, Moscow State University, Moscow 119992, Russia; Sechenov First Moscow State Medical University, Institute of Molecular Medicine, Moscow 119991, Russia
| | - Sergey Y Morozov
- Department of Virology, Biological Faculty, Moscow State University, Moscow 119234, Russia; Belozersky Institute of Physico-Chemical Biology, Moscow State University, Moscow 119992, Russia.
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Pankratenko AV, Atabekova AK, Lazareva EA, Baksheeva VE, Zhironkina OA, Zernii EY, Owens RA, Solovyev AG, Morozov SY. Plant-specific 4/1 polypeptide interacts with an endoplasmic reticulum protein related to human BAP31. PLANTA 2017; 245:193-205. [PMID: 27714454 DOI: 10.1007/s00425-016-2601-8] [Citation(s) in RCA: 6] [Impact Index Per Article: 0.9] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 07/22/2016] [Accepted: 09/28/2016] [Indexed: 06/06/2023]
Abstract
MAIN CONCLUSION The plant-specific 4/1 protein interacts, both in yeast two-hybrid system and in vitro, and co-localizes in plant cells with plant BAP-like protein, the orthologue of human protein BAP31. In yeast two-hybrid system, we identified a number of Nicotiana benthamiana protein interactors of Nt-4/1, the protein known to affect systemic transport of potato spindle tuber viroid. For one of these interactors, an orthologue of human B-cell receptor-associated protein 31 (BAP31) termed plant BAP-like protein (PBL), the ability to interact with Nt-4/1 was studied in greater detail. Analyses of purified proteins expressed in bacterial cells carried out in vitro with the surface plasmon resonance (SPR) spectroscopy revealed that the N. tabacum PBL (NtPBL) was able to interact with Nt-4/1 with high-affinity, and that their complex can form at physiologically relevant concentrations of both proteins. Subcellular localization studies of 4/1-GFP and NtPBL-mRFP transiently co-expressed in plant cells revealed the co-localization of the two fusion proteins in endoplasmic reticulum-associated bodies, suggesting their interaction in vivo. The N-terminal region of the Nt-4/1 protein was found to be required for the specific subcellular targeting of the protein, presumably due to a predicted amphipathic helix mediating association of the Nt-4/1 protein with cell membranes. Additionally, this region was found to contain a trans-activator domain responsible for the Nt-4/1 ability to activate transcription of a reporter gene in yeast.
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Affiliation(s)
- Anna V Pankratenko
- Department of Virology, Biological Faculty, Moscow State University, Moscow, 119992, Russia
| | - Anastasia K Atabekova
- Department of Virology, Biological Faculty, Moscow State University, Moscow, 119992, Russia
| | - Ekaterina A Lazareva
- Department of Virology, Biological Faculty, Moscow State University, Moscow, 119992, Russia
| | - Viktoriia E Baksheeva
- Belozersky Institute of Physico-Chemical Biology, Moscow State University, Moscow, 119992, Russia
| | - Oxana A Zhironkina
- Belozersky Institute of Physico-Chemical Biology, Moscow State University, Moscow, 119992, Russia
| | - Evgeni Yu Zernii
- Belozersky Institute of Physico-Chemical Biology, Moscow State University, Moscow, 119992, Russia
| | - Robert A Owens
- Molecular Plant Pathology Laboratory, USDA-ARS, Beltsville, MD, 20705, USA
| | - Andrey G Solovyev
- Belozersky Institute of Physico-Chemical Biology, Moscow State University, Moscow, 119992, Russia
- Institute of Molecular Medicine, Sechenov First Moscow State Medical University, Moscow, 119991, Russia
| | - Sergey Y Morozov
- Department of Virology, Biological Faculty, Moscow State University, Moscow, 119992, Russia.
- Belozersky Institute of Physico-Chemical Biology, Moscow State University, Moscow, 119992, Russia.
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Morozov SY, Milyutina IA, Bobrova VK, Ryazantsev DY, Erokhina TN, Zavriev SK, Agranovsky AA, Solovyev AG, Troitsky AV. Structural evolution of the 4/1 genes and proteins in non-vascular and lower vascular plants. Biochimie 2015; 119:125-36. [PMID: 26542289 DOI: 10.1016/j.biochi.2015.10.019] [Citation(s) in RCA: 5] [Impact Index Per Article: 0.6] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/24/2015] [Accepted: 10/29/2015] [Indexed: 12/19/2022]
Abstract
The 4/1 protein of unknown function is encoded by a single-copy gene in most higher plants. The 4/1 protein of Nicotiana tabacum (Nt-4/1 protein) has been shown to be alpha-helical and predominantly expressed in conductive tissues. Here, we report the analysis of 4/1 genes and the encoded proteins of lower land plants. Sequences of a number of 4/1 genes from liverworts, lycophytes, ferns and gymnosperms were determined and analyzed together with sequences available in databases. Most of the vascular plants were found to encode Magnoliophyta-like 4/1 proteins exhibiting previously described gene structure and protein properties. Identification of the 4/1-like proteins in hornworts, liverworts and charophyte algae (sister lineage to all land plants) but not in mosses suggests that 4/1 proteins are likely important for plant development but not required for a primary metabolic function of plant cell.
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Affiliation(s)
- Sergey Y Morozov
- Department of Virology, Biological Faculty, Lomonosov Moscow State University, Moscow 119992, Russia; A. N. Belozersky Institute of Physico-Chemical Biology, Lomonosov Moscow State University, 119992 Moscow, Russia.
| | - Irina A Milyutina
- A. N. Belozersky Institute of Physico-Chemical Biology, Lomonosov Moscow State University, 119992 Moscow, Russia
| | - Vera K Bobrova
- A. N. Belozersky Institute of Physico-Chemical Biology, Lomonosov Moscow State University, 119992 Moscow, Russia
| | - Dmitry Y Ryazantsev
- M. M. Shemyakin and Yu. A. Ovchinnikov Institute of Bioorganic Chemistry, Russian Academy of Sciences, 16/10 Miklukho-Maklaya Str., Moscow 117997, Russia
| | - Tatiana N Erokhina
- M. M. Shemyakin and Yu. A. Ovchinnikov Institute of Bioorganic Chemistry, Russian Academy of Sciences, 16/10 Miklukho-Maklaya Str., Moscow 117997, Russia
| | - Sergey K Zavriev
- M. M. Shemyakin and Yu. A. Ovchinnikov Institute of Bioorganic Chemistry, Russian Academy of Sciences, 16/10 Miklukho-Maklaya Str., Moscow 117997, Russia
| | - Alexey A Agranovsky
- Department of Virology, Biological Faculty, Lomonosov Moscow State University, Moscow 119992, Russia
| | - Andrey G Solovyev
- A. N. Belozersky Institute of Physico-Chemical Biology, Lomonosov Moscow State University, 119992 Moscow, Russia
| | - Alexey V Troitsky
- A. N. Belozersky Institute of Physico-Chemical Biology, Lomonosov Moscow State University, 119992 Moscow, Russia
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Makarova SS, Solovyev AG, Morozov SY. RNA-binding properties of the plant protein Nt-4/1. BIOCHEMISTRY. BIOKHIMIIA 2014; 79:717-26. [PMID: 25108334 DOI: 10.1134/s000629791407013x] [Citation(s) in RCA: 8] [Impact Index Per Article: 0.8] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 11/22/2022]
Abstract
The tobacco α-helical protein Nt-4/1 with unknown function forms ribonucleoprotein (RNP) complexes in vitro. Results obtained by retardation of RNP complexes in agarose gel were confirmed by Western-Northern hybridization. Several deletion and point mutants of Nt-4/1 were constructed, and the RNA-binding site was mapped in a positively charged region of the C-terminal domain of the protein. The results of this study and those described earlier support our hypothesis of the participation of Nt-4/1 protein in spreading RNA-containing pathogens in the plant.
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Affiliation(s)
- S S Makarova
- Lomonosov Moscow State University, Biological Faculty, Moscow, 119234, Russia.
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Morozov SY, Makarova SS, Erokhina TN, Kopertekh L, Schiemann J, Owens RA, Solovyev AG. Plant 4/1 protein: potential player in intracellular, cell-to-cell and long-distance signaling. FRONTIERS IN PLANT SCIENCE 2014; 5:26. [PMID: 24611067 PMCID: PMC3933784 DOI: 10.3389/fpls.2014.00026] [Citation(s) in RCA: 12] [Impact Index Per Article: 1.2] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Subscribe] [Scholar Register] [Received: 12/10/2013] [Accepted: 01/22/2014] [Indexed: 05/09/2023]
Abstract
Originally isolated as a result of its ability to interact with the movement protein of Tomato spotted wilt virus in a yeast two-hybrid system, the 4/1 protein is proving to be an excellent tool for studying intracellular protein trafficking and intercellular communication. Expression of 4/1 in vivo is tightly regulated, first appearing in the veins of the cotyledon and later in the vasculature of the leaf and stem in association with the xylem parenchyma and phloem parenchyma. Structural studies indicate that 4/1 proteins contain as many as five coiled-coil (CC) domains; indeed, the highest level of sequence identity among 4/1 proteins involves their C-terminal CC domains, suggesting that protein-protein interaction is important for biological function. Recent data predict that the tertiary structure of this C-terminal CC domain is strikingly similar to that of yeast protein She2p; furthermore, like She2p, 4/1 protein exhibits RNA-binding activity, and mutational analysis has shown that the C-terminal CC domain is responsible for RNA binding. The 4/1 protein contains a nuclear export signal. Additional microscopy studies involving leptomycin and computer prediction suggest the presence of a nuclear localization signal as well.
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Affiliation(s)
- Sergey Y. Morozov
- A. N. Belozersky Institute of Physico-Chemical Biology, Moscow State UniversityMoscow, Russia
- *Correspondence: Sergey Y. Morozov, A. N. Belozersky Institute of Physico-Chemical Biology, Moscow State University, Moscow 119992, Russia e-mail:
| | - Svetlana S. Makarova
- Department of Virology, Faculty of Biology, Moscow State UniversityMoscow, Russia
| | - Tatyana N. Erokhina
- M. M. Shemyakin and Yu. A. Ovchinnikov Institute of Bioorganic Chemistry, Russian Academy of SciencesMoscow, Russia
| | - Lilya Kopertekh
- Biosafety in Plant Biotechnology, Julius Kühn Institute – Federal Research Centre for Cultivated PlantsQuedlinburg, Germany
| | - Joachim Schiemann
- Biosafety in Plant Biotechnology, Julius Kühn Institute – Federal Research Centre for Cultivated PlantsQuedlinburg, Germany
| | | | - Andrey G. Solovyev
- A. N. Belozersky Institute of Physico-Chemical Biology, Moscow State UniversityMoscow, Russia
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Solovyev AG, Makarova SS, Remizowa MV, Lim HS, Hammond J, Owens RA, Kopertekh L, Schiemann J, Morozov SY. Possible role of the Nt-4/1 protein in macromolecular transport in vascular tissue. PLANT SIGNALING & BEHAVIOR 2013; 8:doi: 10.4161/psb.25784. [PMID: 23887490 PMCID: PMC4091084 DOI: 10.4161/psb.25784] [Citation(s) in RCA: 14] [Impact Index Per Article: 1.3] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 06/17/2013] [Revised: 07/16/2013] [Accepted: 07/16/2013] [Indexed: 05/13/2023]
Abstract
The Arabidopsis thaliana 4/1 (At-4/1) protein has a highly α-helical structure with potential to interact both with itself and other protein ligands, including the movement proteins of some plant viruses; the Nicotiana tabacum ortholog (Nt-4/1) has similar structure. Here we describe localization of GUS expression in transgenic N. tabacum seedlings under control of the Nt-4/1 promoter, which indicates that transcription is associated with the veins at certain developmental stages, and especially in the hypocotyl. Viroid accumulation and movement was altered in plants in which 4/1 expression was reduced by virus-induced gene silencing. These localization studies support a role of 4/1 in signaling in the vasculature,including mobility of pathogen-related and cellular RNAs.
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Affiliation(s)
- Andrey G Solovyev
- A. N. Belozersky Institute of Physico-Chemical Biology; Moscow State University; Moscow, Russia
| | | | | | - Hyoun-Sub Lim
- Molecular Plant Pathology Laboratory; USDA/ARS; Beltsville, MD USA
| | - John Hammond
- Floral and Nursery Plants Research Unit; USDA/ARS; Beltsville, MD USA
| | - Robert A Owens
- Molecular Plant Pathology Laboratory; USDA/ARS; Beltsville, MD USA
| | - Lilya Kopertekh
- Julius Kühn Institute (JKI); Federal Research Centre for Cultivated Plants; Institute for Biosafety of Genetically Modified Plants; Quedlinburg, Germany
| | - Joachim Schiemann
- Julius Kühn Institute (JKI); Federal Research Centre for Cultivated Plants; Institute for Biosafety of Genetically Modified Plants; Quedlinburg, Germany
| | - Sergey Y Morozov
- Department of Virology; Moscow State University; Moscow, Russia
- A.N. Belozersky Institute of Physico-Chemical Biology; Moscow State University; Moscow, Russia
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Solovyev AG, Minina EA, Makarova SS, Erokhina TN, Makarov VV, Kaplan IB, Kopertekh L, Schiemann J, Richert-Pöggeler KR, Morozov SY. Subcellular localization and self-interaction of plant-specific Nt-4/1 protein. Biochimie 2013; 95:1360-70. [PMID: 23499290 DOI: 10.1016/j.biochi.2013.02.015] [Citation(s) in RCA: 22] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/08/2013] [Accepted: 02/26/2013] [Indexed: 11/26/2022]
Abstract
The Nicotiana tabacum Nt-4/1 protein is a plant-specific protein of unknown function. Analysis of bacterially expressed Nt-4/1 protein in vitro revealed that the protein secondary structure is mostly alpha-helical and suggested that it could consist of three structural domains. Earlier studies of At-4/1, the Arabidopsis thaliana-encoded ortholog of Nt-4/1, demonstrated that GFP-fused At-4/1 was capable of polar localization in plant cells, association with plasmodesmata, and cell-to-cell transport. Together with the At-4/1 ability to interact with a plant virus movement protein, these data supported the hypothesis of the At-4/1 protein involvement in viral transport through plasmodesmata. Studies of the Nt-4/1-GFP fusion protein reported in this paper revealed that the protein was localized to cytoplasmic bodies, which were co-aligned with actin filaments and capable of actin-dependent intracellular movement. The Nt-4/1-GFP bodies, being non-membrane structures, were found in association with the plasma membrane, the tubular endoplasmic reticulum and endosome-like structures. Bimolecular fluorescence complementation experiments and inhibition of nuclear export showed that the Nt-4/1 protein was capable of nuclear-cytoplasmic transport. The nuclear export signal (NES) was identified in the Nt-4/1 protein by site-directed mutagenesis. The Nt-4/1 NES mutant was localized to the nucleoplasm forming spherical bodies. Immunogold labeling and electron microscopy of cytoplasmic Nt-4/1-containing bodies and nuclear structures containing the Nt-4/1 NES mutant revealed differences in their fine structure. In mammalian cells, Nt-4/1-GFP formed cytoplasmic spherical bodies similar to those found for the Nt-4/1 NES mutant in plant cell nuclei. Using dynamic laser light scattering and electron microscopy, the Nt-4/1 protein was found to form multimeric complexes in vitro.
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Affiliation(s)
- A G Solovyev
- A.N. Belozersky Institute of Physico-Chemical Biology, Moscow State University, Chochlova Str. 1, 119992 Moscow, Russia
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