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  1. Article ; Online: A novel sterol-binding protein reveals heterogeneous cholesterol distribution in neurite outgrowth and in late endosomes/lysosomes.

    Yamaji-Hasegawa, Akiko / Murate, Motohide / Inaba, Takehiko / Dohmae, Naoshi / Sato, Masayuki / Fujimori, Fumihiro / Sako, Yasushi / Greimel, Peter / Kobayashi, Toshihide

    Cellular and molecular life sciences : CMLS

    2022  Volume 79, Issue 6, Page(s) 324

    Abstract: We identified a mushroom-derived protein, maistero-2 that specifically binds 3-hydroxy sterol including cholesterol (Chol). Maistero-2 bound lipid mixture in Chol-dependent manner with a binding threshold of around 30%. Changing lipid composition did not ...

    Abstract We identified a mushroom-derived protein, maistero-2 that specifically binds 3-hydroxy sterol including cholesterol (Chol). Maistero-2 bound lipid mixture in Chol-dependent manner with a binding threshold of around 30%. Changing lipid composition did not significantly affect the threshold concentration. EGFP-maistero-2 labeled cell surface and intracellular organelle Chol with higher sensitivity than that of well-established Chol probe, D4 fragment of perfringolysin O. EGFP-maistero-2 revealed increase of cell surface Chol during neurite outgrowth and heterogeneous Chol distribution between CD63-positive and LAMP1-positive late endosomes/lysosomes. The absence of strictly conserved Thr-Leu pair present in Chol-dependent cytolysins suggests a distinct Chol-binding mechanism for maistero-2.
    MeSH term(s) Carrier Proteins/metabolism ; Cholesterol/metabolism ; Endosomes/metabolism ; Lysosomes/metabolism ; Neuronal Outgrowth ; Sterols/metabolism
    Chemical Substances Carrier Proteins ; Sterols ; Cholesterol (97C5T2UQ7J)
    Language English
    Publishing date 2022-05-29
    Publishing country Switzerland
    Document type Journal Article
    ZDB-ID 1358415-7
    ISSN 1420-9071 ; 1420-682X
    ISSN (online) 1420-9071
    ISSN 1420-682X
    DOI 10.1007/s00018-022-04339-6
    Database MEDical Literature Analysis and Retrieval System OnLINE

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  2. Article: A novel sterol-binding protein reveals heterogeneous cholesterol distribution in neurite outgrowth and in late endosomes/lysosomes

    Yamaji-Hasegawa, Akiko / Murate, Motohide / Inaba, Takehiko / Dohmae, Naoshi / Sato, Masayuki / Fujimori, Fumihiro / Sako, Yasushi / Greimel, Peter / Kobayashi, Toshihide

    Cellular and molecular life sciences. 2022 June, v. 79, no. 6

    2022  

    Abstract: We identified a mushroom-derived protein, maistero-2 that specifically binds 3-hydroxy sterol including cholesterol (Chol). Maistero-2 bound lipid mixture in Chol-dependent manner with a binding threshold of around 30%. Changing lipid composition did not ...

    Abstract We identified a mushroom-derived protein, maistero-2 that specifically binds 3-hydroxy sterol including cholesterol (Chol). Maistero-2 bound lipid mixture in Chol-dependent manner with a binding threshold of around 30%. Changing lipid composition did not significantly affect the threshold concentration. EGFP-maistero-2 labeled cell surface and intracellular organelle Chol with higher sensitivity than that of well-established Chol probe, D4 fragment of perfringolysin O. EGFP-maistero-2 revealed increase of cell surface Chol during neurite outgrowth and heterogeneous Chol distribution between CD63-positive and LAMP1-positive late endosomes/lysosomes. The absence of strictly conserved Thr-Leu pair present in Chol-dependent cytolysins suggests a distinct Chol-binding mechanism for maistero-2.
    Keywords cholesterol ; endosomes ; lipid composition ; lysosomes ; neurites
    Language English
    Dates of publication 2022-06
    Size p. 324.
    Publishing place Springer International Publishing
    Document type Article
    ZDB-ID 1358415-7
    ISSN 1420-9071 ; 1420-682X
    ISSN (online) 1420-9071
    ISSN 1420-682X
    DOI 10.1007/s00018-022-04339-6
    Database NAL-Catalogue (AGRICOLA)

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  3. Article ; Online: Impact of Intrinsic and Extrinsic Factors on Cellular Sphingomyelin Imaging with Specific Reporter Proteins.

    Kobayashi, Toshihide / Tomishige, Nario / Inaba, Takehiko / Makino, Asami / Murata, Michio / Yamaji-Hasegawa, Akiko / Murate, Motohide

    Contact (Thousand Oaks (Ventura County, Calif.))

    2021  Volume 4, Page(s) 25152564211042456

    Abstract: Sphingomyelin (SM) is a major sphingolipid in mammalian cells. Although SM is enriched in the outer leaflet of the cell plasma membrane, lipids are also observed in the inner leaflet of the plasma membrane and intracellular organelles such as ... ...

    Abstract Sphingomyelin (SM) is a major sphingolipid in mammalian cells. Although SM is enriched in the outer leaflet of the cell plasma membrane, lipids are also observed in the inner leaflet of the plasma membrane and intracellular organelles such as endolysosomes, the Golgi apparatus and nuclei. SM is postulated to form clusters with glycosphingolipids (GSLs), cholesterol (Chol), and other SM molecules through hydrophobic interactions and hydrogen bonding. Thus, different clusters composed of SM, SM/Chol, SM/GSL and SM/GSL/Chol with different stoichiometries may exist in biomembranes. In addition, SM monomers may be located in the glycerophospholipid-rich areas of membranes. Recently developed SM-binding proteins (SBPs) distinguish these different SM assemblies. Here, we summarize the effects of intrinsic factors regulating the lipid-binding specificity of SBPs and extrinsic factors, such as the lipid phase and lipid density, on SM recognition by SBPs. The combination of different SBPs revealed the heterogeneity of SM domains in biomembranes.
    Language English
    Publishing date 2021-09-27
    Publishing country United States
    Document type Journal Article ; Review
    ZDB-ID 2964312-0
    ISSN 2515-2564 ; 2515-2564
    ISSN (online) 2515-2564
    ISSN 2515-2564
    DOI 10.1177/25152564211042456
    Database MEDical Literature Analysis and Retrieval System OnLINE

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  4. Article ; Online: Molecular mechanisms of action of sphingomyelin-specific pore-forming toxin, lysenin.

    Yilmaz, Neval / Yamaji-Hasegawa, Akiko / Hullin-Matsuda, Françoise / Kobayashi, Toshihide

    Seminars in cell & developmental biology

    2017  Volume 73, Page(s) 188–198

    Abstract: Lysenin, which is an earthworm toxin, strongly binds to sphingomyelin (SM). Lysenin oligomerizes on SM-rich domains and can induce cell death by forming pores in the membrane. In this review, the assembly of lysenin on SM-containing membranes is ... ...

    Abstract Lysenin, which is an earthworm toxin, strongly binds to sphingomyelin (SM). Lysenin oligomerizes on SM-rich domains and can induce cell death by forming pores in the membrane. In this review, the assembly of lysenin on SM-containing membranes is discussed mostly on the basis of the information gained by atomic force microscopy (AFM). AFM data show that lysenin assembles into a hexagonal close packed (hcp) structure by rapid reorganization of its oligomers on an SM/cholesterol membrane. In case of a phase-separated membrane of SM, lysenin induces phase mixing as a result of pore formation in SM-rich domains, and consequently its hcp assembly covers the entire membrane. Besides the lytic action, lysenin is important as an SM marker and its pore has the potential to be used as a biosensor in the future. These points are also highlighted in this review.
    MeSH term(s) Microscopy, Atomic Force ; Sphingomyelins/chemistry ; Sphingomyelins/metabolism ; Sphingomyelins/pharmacology ; Thermodynamics ; Toxins, Biological/chemistry ; Toxins, Biological/metabolism ; Toxins, Biological/pharmacology
    Chemical Substances Sphingomyelins ; Toxins, Biological ; lysenin
    Language English
    Publishing date 2017-07-24
    Publishing country England
    Document type Journal Article ; Research Support, Non-U.S. Gov't ; Review
    ZDB-ID 1312473-0
    ISSN 1096-3634 ; 1084-9521
    ISSN (online) 1096-3634
    ISSN 1084-9521
    DOI 10.1016/j.semcdb.2017.07.036
    Database MEDical Literature Analysis and Retrieval System OnLINE

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  5. Article ; Online: Pore-forming moss protein bryoporin is structurally and mechanistically related to actinoporins from evolutionarily distant cnidarians.

    Šolinc, Gašper / Švigelj, Tomaž / Omersa, Neža / Snoj, Tina / Pirc, Katja / Žnidaršič, Nada / Yamaji-Hasegawa, Akiko / Kobayashi, Toshihide / Anderluh, Gregor / Podobnik, Marjetka

    The Journal of biological chemistry

    2022  Volume 298, Issue 10, Page(s) 102455

    Abstract: Pore-forming proteins perforate lipid membranes and consequently affect their integrity and cell fitness. Therefore, it is not surprising that many of these proteins from bacteria, fungi, or certain animals act as toxins. While pore-forming proteins have ...

    Abstract Pore-forming proteins perforate lipid membranes and consequently affect their integrity and cell fitness. Therefore, it is not surprising that many of these proteins from bacteria, fungi, or certain animals act as toxins. While pore-forming proteins have also been found in plants, there is little information about their molecular structure and mode of action. Bryoporin is a protein from the moss Physcomitrium patens, and its corresponding gene was found to be upregulated by various abiotic stresses, especially dehydration, as well as upon fungal infection. Based on the amino acid sequence, it was suggested that bryoporin was related to the actinoporin family of pore-forming proteins, originally discovered in sea anemones. Here, we provide the first detailed structural and functional analysis of this plant cytolysin. The crystal structure of monomeric bryoporin is highly similar to those of actinoporins. Our cryo-EM analysis of its pores showed an actinoporin-like octameric structure, thereby revealing a close kinship of proteins from evolutionarily distant organisms. This was further confirmed by our observation of bryoporin's preferential binding to and formation of pores in membranes containing animal sphingolipids, such as sphingomyelin and ceramide phosphoethanolamine; however, its binding affinity was weaker than that of actinoporin equinatoxin II. We determined bryoporin did not bind to major sphingolipids found in fungi or plants, and its membrane-binding and pore-forming activity was enhanced by various sterols. Our results suggest that bryoporin could represent a part of the moss defense arsenal, acting as a pore-forming toxin against membranes of potential animal pathogens, parasites, or predators.
    MeSH term(s) Animals ; Amino Acid Sequence ; Bryopsida/genetics ; Bryopsida/metabolism ; Cnidarian Venoms/chemistry ; Cytotoxins ; Porins/genetics ; Porins/metabolism ; Sea Anemones/chemistry
    Chemical Substances Cnidarian Venoms ; Cytotoxins ; Porins
    Language English
    Publishing date 2022-09-03
    Publishing country United States
    Document type Journal Article ; Research Support, Non-U.S. Gov't
    ZDB-ID 2997-x
    ISSN 1083-351X ; 0021-9258
    ISSN (online) 1083-351X
    ISSN 0021-9258
    DOI 10.1016/j.jbc.2022.102455
    Database MEDical Literature Analysis and Retrieval System OnLINE

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  6. Article ; Online: Impact of Intrinsic and Extrinsic Factors on Cellular Sphingomyelin Imaging with Specific Reporter Proteins

    Toshihide Kobayashi / Nario Tomishige / Takehiko Inaba / Asami Makino / Michio Murata / Akiko Yamaji-Hasegawa / Motohide Murate

    Contact, Vol

    2021  Volume 4

    Abstract: Sphingomyelin (SM) is a major sphingolipid in mammalian cells. Although SM is enriched in the outer leaflet of the cell plasma membrane, lipids are also observed in the inner leaflet of the plasma membrane and intracellular organelles such as ... ...

    Abstract Sphingomyelin (SM) is a major sphingolipid in mammalian cells. Although SM is enriched in the outer leaflet of the cell plasma membrane, lipids are also observed in the inner leaflet of the plasma membrane and intracellular organelles such as endolysosomes, the Golgi apparatus and nuclei. SM is postulated to form clusters with glycosphingolipids (GSLs), cholesterol (Chol), and other SM molecules through hydrophobic interactions and hydrogen bonding. Thus, different clusters composed of SM, SM/Chol, SM/GSL and SM/GSL/Chol with different stoichiometries may exist in biomembranes. In addition, SM monomers may be located in the glycerophospholipid-rich areas of membranes. Recently developed SM-binding proteins (SBPs) distinguish these different SM assemblies. Here, we summarize the effects of intrinsic factors regulating the lipid-binding specificity of SBPs and extrinsic factors, such as the lipid phase and lipid density, on SM recognition by SBPs. The combination of different SBPs revealed the heterogeneity of SM domains in biomembranes.
    Keywords Biology (General) ; QH301-705.5 ; Biochemistry ; QD415-436
    Language English
    Publishing date 2021-09-01T00:00:00Z
    Publisher SAGE Publishing
    Document type Article ; Online
    Database BASE - Bielefeld Academic Search Engine (life sciences selection)

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  7. Article: Pore-forming toxins: Properties, diversity, and uses as tools to image sphingomyelin and ceramide phosphoethanolamine.

    Yamaji-Hasegawa, Akiko / Hullin-Matsuda, Françoise / Greimel, Peter / Kobayashi, Toshihide

    Biochimica et biophysica acta

    2016  Volume 1858, Issue 3, Page(s) 576–592

    Abstract: Pore-forming toxins (PFTs) represent a unique class of highly specific lipid-binding proteins. The cytotoxicity of these compounds has been overcome through crystallographic structure and mutation studies, facilitating the development of non-toxic lipid ... ...

    Abstract Pore-forming toxins (PFTs) represent a unique class of highly specific lipid-binding proteins. The cytotoxicity of these compounds has been overcome through crystallographic structure and mutation studies, facilitating the development of non-toxic lipid probes. As a consequence, non-toxic PFTs have been utilized as highly specific probes to visualize the diversity and dynamics of lipid nanostructures in living and fixed cells. This review is focused on the application of PFTs and their non-toxic analogs as tools to visualize sphingomyelin and ceramide phosphoethanolamine, two major phosphosphingolipids in mammalian and insect cells, respectively. This article is part of a Special Issue entitled: Pore-Forming Toxins edited by Mauro Dalla Serra and Franco Gambale.
    MeSH term(s) Animals ; Humans ; Insecta/metabolism ; Molecular Imaging/methods ; Molecular Probes/chemistry ; Pore Forming Cytotoxic Proteins/chemistry ; Sphingomyelins/metabolism
    Chemical Substances Molecular Probes ; Pore Forming Cytotoxic Proteins ; Sphingomyelins ; ceramide phosphoethanolamine (112130-78-6)
    Language English
    Publishing date 2016-03
    Publishing country Netherlands
    Document type Journal Article ; Research Support, Non-U.S. Gov't ; Review
    ZDB-ID 60-7
    ISSN 1879-2596 ; 1879-260X ; 1872-8006 ; 1879-2642 ; 1879-2618 ; 1879-2650 ; 0006-3002 ; 0005-2728 ; 0005-2736 ; 0304-4165 ; 0167-4838 ; 1388-1981 ; 0167-4889 ; 0167-4781 ; 0304-419X ; 1570-9639 ; 0925-4439 ; 1874-9399
    ISSN (online) 1879-2596 ; 1879-260X ; 1872-8006 ; 1879-2642 ; 1879-2618 ; 1879-2650
    ISSN 0006-3002 ; 0005-2728 ; 0005-2736 ; 0304-4165 ; 0167-4838 ; 1388-1981 ; 0167-4889 ; 0167-4781 ; 0304-419X ; 1570-9639 ; 0925-4439 ; 1874-9399
    DOI 10.1016/j.bbamem.2015.10.012
    Database MEDical Literature Analysis and Retrieval System OnLINE

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  8. Article ; Online: Intrinsically disordered region of influenza A NP regulates viral genome packaging via interactions with viral RNA and host PI(4,5)P2.

    Kakisaka, Michinori / Yamada, Kazunori / Yamaji-Hasegawa, Akiko / Kobayashi, Toshihide / Aida, Yoko

    Virology

    2016  Volume 496, Page(s) 116–126

    Abstract: To be incorporated into progeny virions, the viral genome must be transported to the inner leaflet of the plasma membrane (PM) and accumulate there. Some viruses utilize lipid components to assemble at the PM. For example, simian virus 40 (SV40) targets ... ...

    Abstract To be incorporated into progeny virions, the viral genome must be transported to the inner leaflet of the plasma membrane (PM) and accumulate there. Some viruses utilize lipid components to assemble at the PM. For example, simian virus 40 (SV40) targets the ganglioside GM1 and human immunodeficiency virus type 1 (HIV-1) utilizes phosphatidylinositol (4,5) bisphosphate [PI(4,5)P2]. Recent studies clearly indicate that Rab11-mediated recycling endosomes are required for influenza A virus (IAV) trafficking of vRNPs to the PM but it remains unclear how IAV vRNP localized or accumulate underneath the PM for viral genome incorporation into progeny virions. In this study, we found that the second intrinsically disordered region (IDR2) of NP regulates two binding steps involved in viral genome packaging. First, IDR2 facilitates NP oligomer binding to viral RNA to form vRNP. Secondly, vRNP assemble by interacting with PI(4,5)P2 at the PM via IDR2. These findings suggest that PI(4,5)P2 functions as the determinant of vRNP accumulation at the PM.
    MeSH term(s) Animals ; Cell Line ; Dogs ; Genome, Viral ; Host-Pathogen Interactions ; Humans ; Influenza A virus/physiology ; Influenza, Human/metabolism ; Influenza, Human/virology ; Intrinsically Disordered Proteins/metabolism ; Models, Molecular ; Molecular Conformation ; Phosphatidylinositol 4,5-Diphosphate/chemistry ; Phosphatidylinositol 4,5-Diphosphate/metabolism ; Protein Binding ; Protein Multimerization ; Protein Transport ; RNA, Viral/chemistry ; RNA, Viral/metabolism ; RNA-Binding Proteins/chemistry ; RNA-Binding Proteins/metabolism ; Structure-Activity Relationship ; Viral Core Proteins/chemistry ; Viral Core Proteins/metabolism ; Virus Assembly ; Virus Replication
    Chemical Substances Intrinsically Disordered Proteins ; NP protein, Influenza A virus ; Phosphatidylinositol 4,5-Diphosphate ; RNA, Viral ; RNA-Binding Proteins ; Viral Core Proteins
    Language English
    Publishing date 2016-09
    Publishing country United States
    Document type Journal Article
    ZDB-ID 200425-2
    ISSN 1096-0341 ; 0042-6822
    ISSN (online) 1096-0341
    ISSN 0042-6822
    DOI 10.1016/j.virol.2016.05.018
    Database MEDical Literature Analysis and Retrieval System OnLINE

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  9. Article: Asymmetric distribution of phospholipids in biomembranes.

    Yamaji-Hasegawa, Akiko / Tsujimoto, Masafumi

    Biological & pharmaceutical bulletin

    2006  Volume 29, Issue 8, Page(s) 1547–1553

    Abstract: In eukaryotic cells, the biological membrane is characterized by a non-uniform distribution of membrane lipids, vertically as well as laterally. The paradigm for the vertical non-random distribution is the plasma membrane, where phosphatidylcholine (PC), ...

    Abstract In eukaryotic cells, the biological membrane is characterized by a non-uniform distribution of membrane lipids, vertically as well as laterally. The paradigm for the vertical non-random distribution is the plasma membrane, where phosphatidylcholine (PC), sphingomyelin (SM), and glycosphingolipids are primarily located on the exoplasmic leaflet, while aminophospholipids, including phosphatidylserine (PS) and phosphatidylethanolamine (PE), are generally enriched in the cytoplasmic leaflet. Other minor phospholipids, such as phosphatidic acid and phosphatidylinositol (PI), are also enriched on the cytoplasmic face. Such asymmetrical distribution is related to each lipid regulating various biological events through interaction with other molecules. The clarification of the regulatory mechanism of the distribution and movement of membrane lipids is crucial to understanding the physiological roles of lipids. Here we focus on PS, which has been reported to be involved in apoptosis, blood coagulation and other biological phenomena, and summarize the present understanding of the dynamics of this phospholipid, including biosynthesis, metabolism, transport, and transbilayer movement. We also refer to diseases that have been reported to be related to phospholipid asymmetry.
    MeSH term(s) Biological Transport ; Cell Membrane/metabolism ; Humans ; Lipid Bilayers ; Phospholipids/metabolism
    Chemical Substances Lipid Bilayers ; Phospholipids
    Language English
    Publishing date 2006-06-14
    Publishing country Japan
    Document type Journal Article ; Research Support, Non-U.S. Gov't ; Review
    ZDB-ID 1150271-x
    ISSN 1347-5215 ; 0918-6158
    ISSN (online) 1347-5215
    ISSN 0918-6158
    DOI 10.1248/bpb.29.1547
    Database MEDical Literature Analysis and Retrieval System OnLINE

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  10. Article: [Proteins which recognize sphingomyelin].

    Yamaji-Hasegawa, Akiko / Kobayashi, Toshihide

    Tanpakushitsu kakusan koso. Protein, nucleic acid, enzyme

    2002  Volume 47, Issue 4 Suppl, Page(s) 519–525

    MeSH term(s) Animals ; Antibodies, Monoclonal/metabolism ; Carrier Proteins/metabolism ; Humans ; Immunoglobulin M/metabolism ; Membrane Microdomains ; Molecular Probes ; Protein Binding ; Proteins/metabolism ; Sphingomyelin Phosphodiesterase/metabolism ; Sphingomyelins/chemistry ; Sphingomyelins/metabolism ; Toxins, Biological
    Chemical Substances Antibodies, Monoclonal ; Carrier Proteins ; Immunoglobulin M ; Molecular Probes ; Proteins ; Sphingomyelins ; Toxins, Biological ; lysenin ; sphingomyelin transfer protein, rat ; Sphingomyelin Phosphodiesterase (EC 3.1.4.12)
    Language Japanese
    Publishing date 2002-03
    Publishing country Japan
    Document type Journal Article ; Review
    ZDB-ID 391163-9
    ISSN 0039-9450
    ISSN 0039-9450
    Database MEDical Literature Analysis and Retrieval System OnLINE

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