LIVIVO - The Search Portal for Life Sciences

zur deutschen Oberfläche wechseln
Advanced search

Search results

Result 1 - 10 of total 20

Search options

  1. Article ; Online: Structure Determination from Lipidic Cubic Phase Embedded Microcrystals by MicroED.

    Zhu, Lan / Bu, Guanhong / Jing, Liang / Shi, Dan / Lee, Ming-Yue / Gonen, Tamir / Liu, Wei / Nannenga, Brent L

    Structure (London, England : 1993)

    2020  Volume 28, Issue 10, Page(s) 1149–1159.e4

    Abstract: The lipidic cubic phase (LCP) technique has proved to facilitate the growth of high-quality crystals that are otherwise difficult to grow by other methods. However, the crystal size optimization process could be time and resource consuming, if it ever ... ...

    Abstract The lipidic cubic phase (LCP) technique has proved to facilitate the growth of high-quality crystals that are otherwise difficult to grow by other methods. However, the crystal size optimization process could be time and resource consuming, if it ever happens. Therefore, improved techniques for structure determination using these small crystals is an important strategy in diffraction technology development. Microcrystal electron diffraction (MicroED) is a technique that uses a cryo-transmission electron microscopy to collect electron diffraction data and determine high-resolution structures from very thin micro- and nanocrystals. In this work, we have used modified LCP and MicroED protocols to analyze crystals embedded in LCP converted by 2-methyl-2,4-pentanediol or lipase, including Proteinase K crystals grown in solution, cholesterol crystals, and human adenosine A
    MeSH term(s) Cholesterol/chemistry ; Cryoelectron Microscopy/methods ; Crystallization/methods ; Endopeptidase K/chemistry ; Glycols/chemistry ; Lipids/chemistry ; Microscopy, Electron, Transmission/methods ; Nanoparticles/chemistry ; Receptor, Adenosine A2A/chemistry
    Chemical Substances ADORA2A protein, human ; Glycols ; Lipids ; Receptor, Adenosine A2A ; Cholesterol (97C5T2UQ7J) ; Endopeptidase K (EC 3.4.21.64) ; hexylene glycol (KEH0A3F75J)
    Language English
    Publishing date 2020-07-30
    Publishing country United States
    Document type Journal Article ; Research Support, N.I.H., Extramural ; Research Support, Non-U.S. Gov't ; Research Support, U.S. Gov't, Non-P.H.S.
    ZDB-ID 1213087-4
    ISSN 1878-4186 ; 0969-2126
    ISSN (online) 1878-4186
    ISSN 0969-2126
    DOI 10.1016/j.str.2020.07.006
    Database MEDical Literature Analysis and Retrieval System OnLINE

    More links

    Kategorien

  2. Article: Overview of Biochemical Assays in Lipidic Cubic Phase.

    Lan, Zhu / Lee, Ming-Yue / Chun, Eugene / Liu, Bin / Liu, Wei

    Trends in biochemical sciences

    2018  Volume 44, Issue 4, Page(s) 295–299

    Abstract: The development of novel biochemical methods to efficiently characterize membrane protein (MP) properties in lipidic cubic phase (LCP) is important for studying complicated MPs and their multimeric complexes. Here, we summarize recent LCP-related assays ... ...

    Abstract The development of novel biochemical methods to efficiently characterize membrane protein (MP) properties in lipidic cubic phase (LCP) is important for studying complicated MPs and their multimeric complexes. Here, we summarize recent LCP-related assays and provide an outlook on their applications in structure and function studies of MPs.
    MeSH term(s) Crystallography, X-Ray ; Lipids/chemistry ; Membrane Proteins/chemistry ; Membrane Proteins/metabolism ; Models, Molecular
    Chemical Substances Lipids ; Membrane Proteins
    Language English
    Publishing date 2018-09-19
    Publishing country England
    Document type Journal Article ; Review
    ZDB-ID 194216-5
    ISSN 1362-4326 ; 0968-0004 ; 0376-5067
    ISSN (online) 1362-4326
    ISSN 0968-0004 ; 0376-5067
    DOI 10.1016/j.tibs.2018.08.008
    Database MEDical Literature Analysis and Retrieval System OnLINE

    More links

    Kategorien

  3. Article ; Online: Evidence that specific interactions play a role in the cholesterol sensitivity of G protein-coupled receptors.

    Geiger, James / Sexton, Rick / Al-Sahouri, Zina / Lee, Ming-Yue / Chun, Eugene / Harikumar, Kaleeckal G / Miller, Laurence J / Beckstein, Oliver / Liu, Wei

    Biochimica et biophysica acta. Biomembranes

    2021  Volume 1863, Issue 9, Page(s) 183557

    Abstract: G protein-coupled receptors (GPCRs) are known to be modulated by membrane cholesterol levels, but whether or not the effects are caused by specific receptor-cholesterol interactions or cholesterol's general effects on the membrane is not well-understood. ...

    Abstract G protein-coupled receptors (GPCRs) are known to be modulated by membrane cholesterol levels, but whether or not the effects are caused by specific receptor-cholesterol interactions or cholesterol's general effects on the membrane is not well-understood. We performed coarse-grained molecular dynamics (CGMD) simulations coupled with structural bioinformatics approaches on the β
    MeSH term(s) Cholesterol/chemistry ; Models, Molecular ; Receptors, G-Protein-Coupled/chemistry
    Chemical Substances Receptors, G-Protein-Coupled ; Cholesterol (97C5T2UQ7J)
    Language English
    Publishing date 2021-01-11
    Publishing country Netherlands
    Document type Journal Article ; Research Support, N.I.H., Extramural ; Research Support, Non-U.S. Gov't ; Research Support, U.S. Gov't, Non-P.H.S.
    ZDB-ID 60-7
    ISSN 1879-2642 ; 1879-2596 ; 1879-260X ; 1872-8006 ; 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) 1879-2642 ; 1879-2596 ; 1879-260X ; 1872-8006 ; 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.2021.183557
    Database MEDical Literature Analysis and Retrieval System OnLINE

    More links

    Kategorien

  4. Article ; Online: Insight into the molecular basis of aromatic polyketide cyclization: crystal structure and in vitro characterization of WhiE-ORFVI.

    Lee, Ming-Yue / Ames, Brian D / Tsai, Shiou-Chuan

    Biochemistry

    2012  Volume 51, Issue 14, Page(s) 3079–3091

    Abstract: Aromatic polyketides are biologically active natural products. Many important pharmaceuticals are derived from aromatic polyketides. Especially important in aromatic polyketide biosynthesis is the regiospecific cyclization of a linear, preassembled ... ...

    Abstract Aromatic polyketides are biologically active natural products. Many important pharmaceuticals are derived from aromatic polyketides. Especially important in aromatic polyketide biosynthesis is the regiospecific cyclization of a linear, preassembled polyketide chain catalyzed by aromatase/cyclase (ARO/CYC), which serves as a key control point in aromatic ring formation. How different ARO/CYCs promote different cyclization patterns is not well understood. The whiE locus of Streptomyces coelicolor A3(2) is responsible for the biosynthesis of an aromatic polyketide precursor to the gray spore pigment. The WhiE ARO/CYC catalyzes the regiospecific C9-C14 and C7-C16 cyclization and aromatization of a 24-carbon polyketide chain. WhiE ARO/CYC shares a high degree of similarity to another nonreducing PKS ARO/CYC, TcmN ARO/CYC. This paper presents the apo crystal structure of WhiE ARO/CYC, and cocrystal structures of WhiE and TcmN ARO/CYCs bound with polycyclic aromatic compounds that mimic the respective ARO/CYC products. Site-directed mutagenesis coupled with in vitro PKS reconstitution assays was used to characterize the interior pocket residues of WhiE ARO/CYC. The results confirmed that the interior pocket of ARO/CYCs is a critical determinant of polyketide cyclization specificity. A unified ARO/CYC-mediated cyclization mechanism is proposed on the basis of these structural and functional results.
    MeSH term(s) Amino Acid Sequence ; Aromatase/chemistry ; Aromatase/metabolism ; Bacterial Proteins/chemistry ; Bacterial Proteins/metabolism ; Crystallography, X-Ray ; Cyclization ; Models, Molecular ; Molecular Sequence Data ; Mutagenesis, Site-Directed ; Polyketide Synthases/chemistry ; Polyketide Synthases/metabolism ; Polyketides/chemistry ; Polyketides/metabolism ; Protein Conformation ; Sequence Alignment ; Streptomyces coelicolor/enzymology ; Streptomyces coelicolor/metabolism
    Chemical Substances Bacterial Proteins ; Polyketides ; Polyketide Synthases (79956-01-7) ; Aromatase (EC 1.14.14.1)
    Language English
    Publishing date 2012-03-30
    Publishing country United States
    Document type Journal Article ; Research Support, N.I.H., Extramural ; Research Support, Non-U.S. Gov't
    ZDB-ID 1108-3
    ISSN 1520-4995 ; 0006-2960
    ISSN (online) 1520-4995
    ISSN 0006-2960
    DOI 10.1021/bi201705q
    Database MEDical Literature Analysis and Retrieval System OnLINE

    More links

    Kategorien

  5. Article: Harnessing the power of an X-ray laser for serial crystallography of membrane proteins crystallized in lipidic cubic phase.

    Lee, Ming-Yue / Geiger, James / Ishchenko, Andrii / Han, Gye Won / Barty, Anton / White, Thomas A / Gati, Cornelius / Batyuk, Alexander / Hunter, Mark S / Aquila, Andrew / Boutet, Sébastien / Weierstall, Uwe / Cherezov, Vadim / Liu, Wei

    IUCrJ

    2020  Volume 7, Issue Pt 6, Page(s) 976–984

    Abstract: Serial femtosecond crystallography (SFX) with X-ray free-electron lasers (XFELs) has proven highly successful for structure determination of challenging membrane proteins crystallized in lipidic cubic phase; however, like most techniques, it has ... ...

    Abstract Serial femtosecond crystallography (SFX) with X-ray free-electron lasers (XFELs) has proven highly successful for structure determination of challenging membrane proteins crystallized in lipidic cubic phase; however, like most techniques, it has limitations. Here we attempt to address some of these limitations related to the use of a vacuum chamber and the need for attenuation of the XFEL beam, in order to further improve the efficiency of this method. Using an optimized SFX experimental setup in a helium atmosphere, the room-temperature structure of the adenosine A
    Language English
    Publishing date 2020-10-15
    Publishing country England
    Document type Journal Article
    ZDB-ID 2754953-7
    ISSN 2052-2525
    ISSN 2052-2525
    DOI 10.1107/S2052252520012701
    Database MEDical Literature Analysis and Retrieval System OnLINE

    More links

    Kategorien

  6. Article ; Online: Structural Basis of the Activation of Heterotrimeric Gs-Protein by Isoproterenol-Bound β

    Su, Minfei / Zhu, Lan / Zhang, Yixiao / Paknejad, Navid / Dey, Raja / Huang, Jianyun / Lee, Ming-Yue / Williams, Dewight / Jordan, Kelsey D / Eng, Edward T / Ernst, Oliver P / Meyerson, Joel R / Hite, Richard K / Walz, Thomas / Liu, Wei / Huang, Xin-Yun

    Molecular cell

    2020  Volume 80, Issue 1, Page(s) 59–71.e4

    Abstract: Cardiac disease remains the leading cause of morbidity and mortality worldwide. The ... ...

    Abstract Cardiac disease remains the leading cause of morbidity and mortality worldwide. The β
    MeSH term(s) Animals ; Binding Sites ; Cattle ; Cell Line ; GTP-Binding Protein alpha Subunits, Gs/chemistry ; GTP-Binding Protein alpha Subunits, Gs/metabolism ; Guanosine Diphosphate/metabolism ; Guanosine Triphosphate/metabolism ; Isoproterenol/metabolism ; Models, Molecular ; Protein Binding ; Protein Domains ; Protein Structure, Secondary ; Receptors, Adrenergic, beta-1/chemistry ; Receptors, Adrenergic, beta-1/metabolism
    Chemical Substances Receptors, Adrenergic, beta-1 ; Guanosine Diphosphate (146-91-8) ; Guanosine Triphosphate (86-01-1) ; GTP-Binding Protein alpha Subunits, Gs (EC 3.6.5.1) ; Isoproterenol (L628TT009W)
    Language English
    Publishing date 2020-08-19
    Publishing country United States
    Document type Journal Article ; Research Support, N.I.H., Extramural ; Research Support, Non-U.S. Gov't ; Research Support, U.S. Gov't, Non-P.H.S.
    ZDB-ID 1415236-8
    ISSN 1097-4164 ; 1097-2765
    ISSN (online) 1097-4164
    ISSN 1097-2765
    DOI 10.1016/j.molcel.2020.08.001
    Database MEDical Literature Analysis and Retrieval System OnLINE

    More links

    Kategorien

  7. Article ; Online: Modeling, Synthesis, and Biological Evaluation of Potential Retinoid-X-Receptor (RXR) Selective Agonists: Analogs of 4-[1-(3,5,5,8,8-Pentamethyl-5,6,7,8-tetrahyro-2-naphthyl)ethynyl]benzoic Acid (Bexarotene) and 6-(Ethyl(4-isobutoxy-3-isopropylphenyl)amino)nicotinic Acid (NEt-4IB).

    Jurutka, Peter W / di Martino, Orsola / Reshi, Sabeeha / Mallick, Sanchita / Sabir, Zhela L / Staniszewski, Lech J P / Warda, Ankedo / Maiorella, Emma L / Minasian, Ani / Davidson, Jesse / Ibrahim, Samir J / Raban, San / Haddad, Dena / Khamisi, Madleen / Suban, Stephanie L / Dawson, Bradley J / Candia, Riley / Ziller, Joseph W / Lee, Ming-Yue /
    Liu, Chang / Liu, Wei / Marshall, Pamela A / Welch, John S / Wagner, Carl E

    International journal of molecular sciences

    2021  Volume 22, Issue 22

    Abstract: Five novel analogs of 6-(ethyl)(4-isobutoxy-3-isopropylphenyl)amino)nicotinic acid-or NEt-4IB-in addition to seven novel analogs of 4-[1-(3,5,5,8,8-pentamethyl-5,6,7,8-tetrahydro-2-naphthyl)ethynyl]benzoic acid (bexarotene) were prepared and evaluated ... ...

    Abstract Five novel analogs of 6-(ethyl)(4-isobutoxy-3-isopropylphenyl)amino)nicotinic acid-or NEt-4IB-in addition to seven novel analogs of 4-[1-(3,5,5,8,8-pentamethyl-5,6,7,8-tetrahydro-2-naphthyl)ethynyl]benzoic acid (bexarotene) were prepared and evaluated for selective retinoid-X-receptor (RXR) agonism alongside bexarotene (
    MeSH term(s) Animals ; Antineoplastic Agents/chemical synthesis ; Antineoplastic Agents/pharmacology ; Apolipoproteins E/genetics ; Apolipoproteins E/metabolism ; Bexarotene/analogs & derivatives ; Bexarotene/chemical synthesis ; Bexarotene/pharmacology ; Cell Line, Tumor ; Dose-Response Relationship, Drug ; Gene Expression ; Humans ; Leukocytes/drug effects ; Leukocytes/metabolism ; Leukocytes/pathology ; Nicotinic Acids/chemical synthesis ; Nicotinic Acids/pharmacology ; Retinoid X Receptor alpha/agonists ; Retinoid X Receptor alpha/genetics ; Retinoid X Receptor alpha/metabolism ; Structure-Activity Relationship
    Chemical Substances Antineoplastic Agents ; ApoE protein, human ; Apolipoproteins E ; Nicotinic Acids ; RXRA protein, human ; Retinoid X Receptor alpha ; Bexarotene (A61RXM4375)
    Language English
    Publishing date 2021-11-16
    Publishing country Switzerland
    Document type Journal Article
    ZDB-ID 2019364-6
    ISSN 1422-0067 ; 1422-0067 ; 1661-6596
    ISSN (online) 1422-0067
    ISSN 1422-0067 ; 1661-6596
    DOI 10.3390/ijms222212371
    Database MEDical Literature Analysis and Retrieval System OnLINE

    More links

    Kategorien

  8. Article: Insight into the Molecular Basis of Aromatic Polyketide Cyclization: Crystal Structure and in Vitro Characterization of WhiE-ORFVI

    Lee, Ming-Yue / Ames Brian D / Tsai Shiou-Chuan

    Biochemistry. 2012 Apr. 10, v. 51, no. 14

    2012  

    Abstract: Aromatic polyketides are biologically active natural products. Many important pharmaceuticals are derived from aromatic polyketides. Especially important in aromatic polyketide biosynthesis is the regiospecific cyclization of a linear, preassembled ... ...

    Abstract Aromatic polyketides are biologically active natural products. Many important pharmaceuticals are derived from aromatic polyketides. Especially important in aromatic polyketide biosynthesis is the regiospecific cyclization of a linear, preassembled polyketide chain catalyzed by aromatase/cyclase (ARO/CYC), which serves as a key control point in aromatic ring formation. How different ARO/CYCs promote different cyclization patterns is not well understood. The whiE locus of Streptomyces coelicolor A3(2) is responsible for the biosynthesis of an aromatic polyketide precursor to the gray spore pigment. The WhiE ARO/CYC catalyzes the regiospecific C9–C14 and C7–C16 cyclization and aromatization of a 24-carbon polyketide chain. WhiE ARO/CYC shares a high degree of similarity to another nonreducing PKS ARO/CYC, TcmN ARO/CYC. This paper presents the apo crystal structure of WhiE ARO/CYC, and cocrystal structures of WhiE and TcmN ARO/CYCs bound with polycyclic aromatic compounds that mimic the respective ARO/CYC products. Site-directed mutagenesis coupled with in vitro PKS reconstitution assays was used to characterize the interior pocket residues of WhiE ARO/CYC. The results confirmed that the interior pocket of ARO/CYCs is a critical determinant of polyketide cyclization specificity. A unified ARO/CYC-mediated cyclization mechanism is proposed on the basis of these structural and functional results.
    Keywords Streptomyces coelicolor ; aromatase ; biosynthesis ; crystal structure ; drugs ; loci ; polyketides ; site-directed mutagenesis ; spores
    Language English
    Dates of publication 2012-0410
    Size p. 3079-3091.
    Publishing place American Chemical Society
    Document type Article
    ZDB-ID 1108-3
    ISSN 1520-4995 ; 0006-2960
    ISSN (online) 1520-4995
    ISSN 0006-2960
    DOI 10.1021/bi201705q
    Database NAL-Catalogue (AGRICOLA)

    More links

    Kategorien

  9. Article ; Online: High-throughput in situ X-ray screening of and data collection from protein crystals at room temperature and under cryogenic conditions.

    Broecker, Jana / Morizumi, Takefumi / Ou, Wei-Lin / Klingel, Viviane / Kuo, Anling / Kissick, David J / Ishchenko, Andrii / Lee, Ming-Yue / Xu, Shenglan / Makarov, Oleg / Cherezov, Vadim / Ogata, Craig M / Ernst, Oliver P

    Nature protocols

    2018  Volume 13, Issue 2, Page(s) 260–292

    Abstract: Protein crystallography has significantly advanced in recent years, with in situ data collection, in which crystals are placed in the X-ray beam within their growth medium, being a major point of focus. In situ methods eliminate the need to harvest ... ...

    Abstract Protein crystallography has significantly advanced in recent years, with in situ data collection, in which crystals are placed in the X-ray beam within their growth medium, being a major point of focus. In situ methods eliminate the need to harvest crystals, a previously unavoidable drawback, particularly for often small membrane-protein crystals. Here, we present a protocol for the high-throughput in situ X-ray screening of and data collection from soluble and membrane-protein crystals at room temperature (20-25°C) and under cryogenic conditions. The Mylar in situ method uses Mylar-based film sandwich plates that are inexpensive, easy to make, and compatible with automated imaging, and that show very low background scattering. They support crystallization in microbatch and vapor-diffusion modes, as well as in lipidic cubic phases (LCPs). A set of 3D-printed holders for differently sized patches of Mylar sandwich films makes the method robust and versatile, allows for storage and shipping of crystals, and enables automated mounting at synchrotrons, as well as goniometer-based screening and data collection. The protocol covers preparation of in situ plates and setup of crystallization trials; 3D printing and assembly of holders; opening of plates, isolation of film patches containing crystals, and loading them onto holders; basic screening and data-collection guidelines; and unloading of holders, as well as reuse and recycling of them. In situ plates are prepared and assembled in 1 h; holders are 3D-printed and assembled in ≤90 min; and an in situ plate is opened, and a film patch containing crystals is isolated and loaded onto a holder in 5 min.
    MeSH term(s) Crystallization ; Crystallography, X-Ray/methods ; Data Collection ; High-Throughput Screening Assays/instrumentation ; High-Throughput Screening Assays/methods ; Lipids ; Membrane Proteins/analysis ; Polyethylene Terephthalates/chemistry ; Proteins/chemistry ; Temperature ; X-Rays
    Chemical Substances Lipids ; Membrane Proteins ; Polyethylene Terephthalates ; Proteins ; Lavsan (25038-59-9)
    Language English
    Publishing date 2018-01-04
    Publishing country England
    Document type Journal Article ; Research Support, N.I.H., Extramural ; Research Support, Non-U.S. Gov't
    ZDB-ID 2244966-8
    ISSN 1750-2799 ; 1754-2189
    ISSN (online) 1750-2799
    ISSN 1754-2189
    DOI 10.1038/nprot.2017.135
    Database MEDical Literature Analysis and Retrieval System OnLINE

    More links

    Kategorien

  10. Article: Allosteric Coupling of Drug Binding and Intracellular Signaling in the A2A Adenosine Receptor

    Eddy, Matthew T / Lee, Ming-Yue / Gao, Zhan-Guo / White, Kate L / Didenko, Tatiana / Horst, Reto / Audet, Martin / Stanczak, Pawel / McClary, Kyle M / Han, Gye Won / Jacobson, Kenneth A / Stevens, Raymond C / Wüthrich, Kurt

    Elsevier Inc. Cell. 2018 Jan. 11, v. 172, no. 1-2

    2018  

    Abstract: Signaling across cellular membranes, the 826 human G protein-coupled receptors (GPCRs) govern a wide range of vital physiological processes, making GPCRs prominent drug targets. X-ray crystallography provided GPCR molecular architectures, which also ... ...

    Abstract Signaling across cellular membranes, the 826 human G protein-coupled receptors (GPCRs) govern a wide range of vital physiological processes, making GPCRs prominent drug targets. X-ray crystallography provided GPCR molecular architectures, which also revealed the need for additional structural dynamics data to support drug development. Here, nuclear magnetic resonance (NMR) spectroscopy with the wild-type-like A2A adenosine receptor (A2AAR) in solution provides a comprehensive characterization of signaling-related structural dynamics. All six tryptophan indole and eight glycine backbone 15N–1H NMR signals in A2AAR were individually assigned. These NMR probes provided insight into the role of Asp522.50 as an allosteric link between the orthosteric drug binding site and the intracellular signaling surface, revealing strong interactions with the toggle switch Trp 2466.48, and delineated the structural response to variable efficacy of bound drugs across A2AAR. The present data support GPCR signaling based on dynamic interactions between two semi-independent subdomains connected by an allosteric switch at Asp522.50.
    Keywords G-protein coupled receptors ; X-ray diffraction ; binding sites ; cell membranes ; drugs ; humans ; nuclear magnetic resonance spectroscopy ; tryptophan
    Language English
    Dates of publication 2018-0111
    Size p. 68-80.e12.
    Publishing place Elsevier Inc.
    Document type Article
    ZDB-ID 187009-9
    ISSN 1097-4172 ; 0092-8674
    ISSN (online) 1097-4172
    ISSN 0092-8674
    DOI 10.1016/j.cell.2017.12.004
    Database NAL-Catalogue (AGRICOLA)

    More links

    Kategorien

To top