LIVIVO - Das Suchportal für Lebenswissenschaften

switch to English language
Erweiterte Suche

Ihre letzten Suchen

  1. AU="Müller, Pavel"
  2. AU="Carosi, Mariantonia"
  3. AU="Bindu Sen"
  4. AU="Kohaut, Eva"
  5. AU="Adam F. Cohen"
  6. AU="Daniele Tomassoni"
  7. AU="Bergado, Gretchen"
  8. AU="Schomberg, Harry H"
  9. AU="Halder, Prolay"
  10. AU="Miyaguchi, Ken"
  11. AU="Zhan, Na-ping"
  12. AU="Stewart Quigg"

Suchergebnis

Treffer 1 - 10 von insgesamt 41

Suchoptionen

  1. Artikel ; Online: The development of methodological approaches to the residential real estate segmentation by the affordability criterion

    Muller Pavel / Chepeleva Kristina / Saenko Irina / Shmeleva Zhanna

    E3S Web of Conferences, Vol 208, p

    2020  Band 04004

    Abstract: The article proposes to consider the issues of the residential real estate objects affordability from the position of differentiation by market segments, taking into account differences in the parameters of objects, as well as differences in the cost of ... ...

    Abstract The article proposes to consider the issues of the residential real estate objects affordability from the position of differentiation by market segments, taking into account differences in the parameters of objects, as well as differences in the cost of objects. The issues of housing affordability are considered both in terms of improving housing conditions through the acquisition and the rent. When calculating affordability coefficients, it is proposed to differentially take into account the difference in the income of the population different groups. The matrix of housing affordability in the Krasnoyarsk market was formed from the point of view of the purchasing and renting possibility. The presented methodological approaches to determining the affordability of the residential real estate objects based on segmentation allow to improve the understanding of the processes taking place in the market, and adjust the main directions of the state’s housing policy. This is an opportunity for the construction business and residential rental sector to implement their offers with a clear focus on the target audience, taking into account the specificity of the local market.
    Schlagwörter Environmental sciences ; GE1-350
    Thema/Rubrik (Code) 710
    Sprache Englisch
    Erscheinungsdatum 2020-01-01T00:00:00Z
    Verlag EDP Sciences
    Dokumenttyp Artikel ; Online
    Datenquelle BASE - Bielefeld Academic Search Engine (Lebenswissenschaftliche Auswahl)

    Zusatzmaterialien

    Kategorien

  2. Artikel ; Online: Catalytic Mechanism of Fatty Acid Photodecarboxylase: On the Detection and Stability of the Initial Carbonyloxy Radical Intermediate.

    Aleksandrov, Alexey / Bonvalet, Adeline / Müller, Pavel / Sorigué, Damien / Beisson, Fred / Antonucci, Laura / Solinas, Xavier / Joffre, Manuel / Vos, Marten H

    Angewandte Chemie (International ed. in English)

    2024  Band 63, Heft 19, Seite(n) e202401376

    Abstract: In fatty acid photodecarboxylase (FAP), light-induced formation of the primary radical product RCOO⋅ from fatty acid ... ...

    Abstract In fatty acid photodecarboxylase (FAP), light-induced formation of the primary radical product RCOO⋅ from fatty acid RCOO
    Sprache Englisch
    Erscheinungsdatum 2024-03-28
    Erscheinungsland Germany
    Dokumenttyp Journal Article
    ZDB-ID 2011836-3
    ISSN 1521-3773 ; 1433-7851
    ISSN (online) 1521-3773
    ISSN 1433-7851
    DOI 10.1002/anie.202401376
    Datenquelle MEDical Literature Analysis and Retrieval System OnLINE

    Zusatzmaterialien

    Kategorien

  3. Artikel ; Online: Multiscale Transient Absorption Study of the Fluorescent Protein Dreiklang and Two Point Variants Provides Insight into Photoswitching and Nonproductive Reaction Pathways.

    Renouard, Emilie / Nowinska, Magdalena / Lacombat, Fabien / Plaza, Pascal / Müller, Pavel / Espagne, Agathe

    The journal of physical chemistry letters

    2023  Band 14, Heft 28, Seite(n) 6477–6485

    Abstract: Dreiklang is a reversibly photoswitchable fluorescent protein used as a probe in advanced fluorescence imaging. It undergoes a unique and still poorly understood photoswitching mechanism based on the reversible addition of a water molecule to the ... ...

    Abstract Dreiklang is a reversibly photoswitchable fluorescent protein used as a probe in advanced fluorescence imaging. It undergoes a unique and still poorly understood photoswitching mechanism based on the reversible addition of a water molecule to the chromophore. We report the first comprehensive study of the dynamics of this reaction by transient absorption spectroscopy from 100 fs to seconds in the original Dreiklang protein and two point variants. The picture that emerges from our work is that of a competition between photoswitching and nonproductive reaction pathways. We found that photoswitching had a low quantum yield of 0.4%. It involves electron transfer from a tyrosine residue (Tyr203) to the chromophore and is completed in 33 ns. Nonproductive deactivation pathways comprise recombination of a charge transfer intermediate, excited-state proton transfer from the chromophore to a histidine residue (His145), and decay to the ground state via micro-/millisecond-lived intermediates.
    Mesh-Begriff(e) Luminescent Proteins/chemistry ; Spectrum Analysis ; Protons ; Green Fluorescent Proteins/chemistry
    Chemische Substanzen Luminescent Proteins ; Protons ; Green Fluorescent Proteins (147336-22-9)
    Sprache Englisch
    Erscheinungsdatum 2023-07-12
    Erscheinungsland United States
    Dokumenttyp Journal Article
    ISSN 1948-7185
    ISSN (online) 1948-7185
    DOI 10.1021/acs.jpclett.3c00431
    Datenquelle MEDical Literature Analysis and Retrieval System OnLINE

    Zusatzmaterialien

    Kategorien

  4. Artikel ; Online: Limited solvation of an electron donating tryptophan stabilizes a photoinduced charge-separated state in plant (6-4) photolyase.

    Hosokawa, Yuhei / Müller, Pavel / Kitoh-Nishioka, Hirotaka / Iwai, Shigenori / Yamamoto, Junpei

    Scientific reports

    2022  Band 12, Heft 1, Seite(n) 5084

    Abstract: 6-4) Photolyases ((6-4) PLs) are ubiquitous photoenzymes that use the energy of sunlight to catalyze the repair of carcinogenic UV-induced DNA lesions, pyrimidine(6-4)pyrimidone photoproducts. To repair DNA, (6-4) PLs must first undergo so-called ... ...

    Abstract (6-4) Photolyases ((6-4) PLs) are ubiquitous photoenzymes that use the energy of sunlight to catalyze the repair of carcinogenic UV-induced DNA lesions, pyrimidine(6-4)pyrimidone photoproducts. To repair DNA, (6-4) PLs must first undergo so-called photoactivation, in which their excited flavin adenine dinucleotide (FAD) cofactor is reduced in one or two steps to catalytically active FADH
    Mesh-Begriff(e) Arabidopsis/metabolism ; Deoxyribodipyrimidine Photo-Lyase/genetics ; Electron Transport ; Electrons ; Flavin-Adenine Dinucleotide/metabolism ; Oxidation-Reduction ; Tryptophan/metabolism
    Chemische Substanzen Flavin-Adenine Dinucleotide (146-14-5) ; Tryptophan (8DUH1N11BX) ; Deoxyribodipyrimidine Photo-Lyase (EC 4.1.99.3)
    Sprache Englisch
    Erscheinungsdatum 2022-03-24
    Erscheinungsland England
    Dokumenttyp Journal Article ; Research Support, Non-U.S. Gov't
    ZDB-ID 2615211-3
    ISSN 2045-2322 ; 2045-2322
    ISSN (online) 2045-2322
    ISSN 2045-2322
    DOI 10.1038/s41598-022-08928-0
    Datenquelle MEDical Literature Analysis and Retrieval System OnLINE

    Zusatzmaterialien

    Kategorien

  5. Artikel ; Online: Autocatalytic effect boosts the production of medium-chain hydrocarbons by fatty acid photodecarboxylase.

    Samire, Poutoum P / Zhuang, Bo / Légeret, Bertrand / Baca-Porcel, Ángel / Peltier, Gilles / Sorigué, Damien / Aleksandrov, Alexey / Beisson, Frédéric / Müller, Pavel

    Science advances

    2023  Band 9, Heft 13, Seite(n) eadg3881

    Abstract: Ongoing climate change is driving the search for renewable and carbon-neutral alternatives to fossil fuels. Photocatalytic conversion of fatty acids to hydrocarbons by fatty acid photodecarboxylase (FAP) represents a promising route to green fuels. ... ...

    Abstract Ongoing climate change is driving the search for renewable and carbon-neutral alternatives to fossil fuels. Photocatalytic conversion of fatty acids to hydrocarbons by fatty acid photodecarboxylase (FAP) represents a promising route to green fuels. However, the alleged low activity of FAP on C2 to C12 fatty acids seemed to preclude the use for synthesis of gasoline-range hydrocarbons. Here, we reveal that
    Mesh-Begriff(e) Fatty Acids/metabolism ; Caprylates/metabolism ; Gasoline ; Chlorella/metabolism ; Hydrocarbons
    Chemische Substanzen Fatty Acids ; n-heptane (456148SDMJ) ; octanoic acid (OBL58JN025) ; Caprylates ; Gasoline ; Hydrocarbons
    Sprache Englisch
    Erscheinungsdatum 2023-03-31
    Erscheinungsland United States
    Dokumenttyp Journal Article
    ZDB-ID 2810933-8
    ISSN 2375-2548 ; 2375-2548
    ISSN (online) 2375-2548
    ISSN 2375-2548
    DOI 10.1126/sciadv.adg3881
    Datenquelle MEDical Literature Analysis and Retrieval System OnLINE

    Zusatzmaterialien

    Kategorien

  6. Artikel ; Online: Searching for the mechanism of signalling by plant photoreceptor cryptochrome.

    Müller, Pavel / Bouly, Jean-Pierre

    FEBS letters

    2015  Band 589, Heft 2, Seite(n) 189–192

    Abstract: Even though the plant photoreceptors cryptochromes were discovered more than 20 years ago, the mechanism through which they transduce light signals to their partner molecules such as COP1 (Constitutive Photomorphogenic 1) or SPA1 (Suppressor of ... ...

    Abstract Even though the plant photoreceptors cryptochromes were discovered more than 20 years ago, the mechanism through which they transduce light signals to their partner molecules such as COP1 (Constitutive Photomorphogenic 1) or SPA1 (Suppressor of Phytochrome A) still remains to be established. We propose that a negative charge induced by light in the vicinity of the flavin chromophore initiates cryptochrome 1 signalling. This negative charge might expel the protein-bound ATP from the binding pocket, thereby pushing off the C-terminus that covers the ATP pocket in the dark state of the protein. This conformational change should allow for phosphorylation of previously inaccessible amino acids. A partially phosphorylated 'ESSSSGRR-VPE' fragment of the C-terminus could mimic the sequence of the transcription factor HY5 that is essential for binding to the negative regulator of photomorphogenesis COP1. HY5 release through competition for the COP1 binding site could represent the long-sought connection between light activation of cryptochrome and modulation of photomorphogenesis.
    Mesh-Begriff(e) Cryptochromes/metabolism ; Plant Proteins/chemistry ; Plant Proteins/metabolism ; Plants/chemistry ; Plants/metabolism ; Protein Binding ; Signal Transduction ; Transcription Factors/metabolism
    Chemische Substanzen Cryptochromes ; Plant Proteins ; Transcription Factors
    Sprache Englisch
    Erscheinungsdatum 2015-01-16
    Erscheinungsland England
    Dokumenttyp Journal Article ; Research Support, Non-U.S. Gov't
    ZDB-ID 212746-5
    ISSN 1873-3468 ; 0014-5793
    ISSN (online) 1873-3468
    ISSN 0014-5793
    DOI 10.1016/j.febslet.2014.12.008
    Datenquelle MEDical Literature Analysis and Retrieval System OnLINE

    Zusatzmaterialien

    Kategorien

  7. Artikel: Searching for the mechanism of signalling by plant photoreceptor cryptochrome

    Müller, Pavel / Jean-Pierre Bouly

    Federation of European Biochemical Societies FEBS letters. 2014 Dec. 02,

    2014  

    Abstract: Even though the plant photoreceptors cryptochromes were discovered more than 20years ago, the mechanism through which they transduce light signals to their partner molecules such as COP1 (Constitutive Photomorphogenic 1) or SPA1 (Suppressor of ... ...

    Abstract Even though the plant photoreceptors cryptochromes were discovered more than 20years ago, the mechanism through which they transduce light signals to their partner molecules such as COP1 (Constitutive Photomorphogenic 1) or SPA1 (Suppressor of Phytochrome A) still remains to be established. We propose that a negative charge induced by light in the vicinity of the flavin chromophore initiates cryptochrome 1 signalling. This negative charge might expel the protein-bound ATP from the binding pocket, thereby pushing off the C-terminus that covers the ATP pocket in the dark state of the protein. This conformational change should allow for phosphorylation of previously inaccessible amino acids. A partially phosphorylated ‘ESSSSGRR–VPE’ fragment of the C-terminus could mimic the sequence of the transcription factor HY5 that is essential for binding to the negative regulator of photomorphogenesis COP1. HY5 release through competition for the COP1 binding site could represent the long-sought connection between light activation of cryptochrome and modulation of photomorphogenesis.
    Schlagwörter adenosine triphosphate ; amino acids ; binding sites ; cryptochromes ; phosphorylation ; photomorphogenesis ; photoreceptors ; phytochrome ; transcription factors
    Sprache Englisch
    Erscheinungsverlauf 2014-1202
    Umfang p. .
    Erscheinungsort Elsevier B.V.
    Dokumenttyp Artikel
    Anmerkung Pre-press version
    ZDB-ID 212746-5
    ISSN 1873-3468 ; 0014-5793
    ISSN (online) 1873-3468
    ISSN 0014-5793
    DOI 10.1016/j.febslet.2014.12.008
    Datenquelle NAL Katalog (AGRICOLA)

    Zusatzmaterialien

    Kategorien

  8. Artikel ; Online: Ultrafast photoreduction dynamics of a new class of CPD photolyases.

    Lacombat, Fabien / Espagne, Agathe / Dozova, Nadia / Plaza, Pascal / Müller, Pavel / Emmerich, Hans-Joachim / Saft, Martin / Essen, Lars-Oliver

    Photochemical & photobiological sciences : Official journal of the European Photochemistry Association and the European Society for Photobiology

    2021  Band 20, Heft 6, Seite(n) 733–746

    Abstract: NewPHL is a recently discovered subgroup of ancestral DNA photolyases. Its domain architecture displays pronounced differences from that of canonical photolyases, in particular at the level of the characteristic electron transfer chain, which is limited ... ...

    Abstract NewPHL is a recently discovered subgroup of ancestral DNA photolyases. Its domain architecture displays pronounced differences from that of canonical photolyases, in particular at the level of the characteristic electron transfer chain, which is limited to merely two tryptophans, instead of the "classical" three or four. Using transient absorption spectroscopy, we show that the dynamics of photoreduction of the oxidized FAD cofactor in the NewPHL begins similarly as that in canonical photolyases, i.e., with a sub-ps primary reduction of the excited FAD cofactor by an adjacent tryptophan, followed by migration of the electron hole towards the second tryptophan in the tens of ps regime. However, the resulting tryptophanyl radical then undergoes an unprecedentedly fast deprotonation in less than 100 ps in the NewPHL. In spite of the stabilization effect of this deprotonation, almost complete charge recombination follows in two phases of ~ 950 ps and ~ 50 ns. Such a rapid recombination of the radical pair implies that the first FAD photoreduction step, i.e., conversion of the fully oxidized to the semi-quinone state, should be rather difficult in vivo. We hence suggest that the flavin chromophore likely switches only between its semi-reduced and fully reduced form in NewPHL under physiological conditions.
    Mesh-Begriff(e) Deoxyribodipyrimidine Photo-Lyase/chemistry ; Deoxyribodipyrimidine Photo-Lyase/metabolism ; Electrons ; Flavins/chemistry ; Flavins/metabolism ; Oxidation-Reduction ; Photochemical Processes ; Thermodynamics ; Tryptophan/chemistry ; Tryptophan/metabolism
    Chemische Substanzen Flavins ; Tryptophan (8DUH1N11BX) ; Deoxyribodipyrimidine Photo-Lyase (EC 4.1.99.3)
    Sprache Englisch
    Erscheinungsdatum 2021-05-11
    Erscheinungsland England
    Dokumenttyp Journal Article
    ZDB-ID 2072584-X
    ISSN 1474-9092 ; 1474-905X
    ISSN (online) 1474-9092
    ISSN 1474-905X
    DOI 10.1007/s43630-021-00048-4
    Datenquelle MEDical Literature Analysis and Retrieval System OnLINE

    Zusatzmaterialien

    Kategorien

  9. Artikel ; Online: [Ru(bpy)(3)](2+) as a reference in transient absorption spectroscopy: differential absorption coefficients for formation of the long-lived (3)MLCT excited state.

    Müller, Pavel / Brettel, Klaus

    Photochemical & photobiological sciences : Official journal of the European Photochemistry Association and the European Society for Photobiology

    2012  Band 11, Heft 4, Seite(n) 632–636

    Abstract: Transient absorption spectroscopy and other time-resolved methods are commonly used to study chemical reactions and biological processes induced by absorption of light. In order to scale the signal amplitude or to compare results obtained under different ...

    Abstract Transient absorption spectroscopy and other time-resolved methods are commonly used to study chemical reactions and biological processes induced by absorption of light. In order to scale the signal amplitude or to compare results obtained under different conditions, it is advisable to use a reference system, a standard of convenient and well-defined properties. Finding Tris(bipyridine)ruthenium(ii), [Ru(bpy)(3)](2+), a suitable candidate for a transient-absorption spectroscopy reference due to its favourable photochemical properties, we have determined accurate relative values of differential molar absorption coefficients (Δε) for light-induced formation of the metal-to-ligand charge transfer (MLCT) excited triplet state at several relevant wavelengths (wavelengths of commercially available lasers) in the UV and visible regions. We have also attempted to determine the absolute value of Δε close to the wavelength of maximum bleaching (∼450 nm) and we propose to narrow down the interval of conceivable values for Δε(450) from the broad range of published values (-0.88 × 10(4) M(-1)cm(-1) to -1.36 × 10(4) M(-1)cm(-1)) to -1.1 × 10(4) M(-1)cm(-1)± 15%. Having ourselves successfully applied [Ru(bpy)(3)](2+) as a standard in a recent time-resolved study of enzymatic DNA repair, we would like to encourage other scientists to use this convenient tool as a reference in their future spectroscopic studies on time scales from picoseconds to hundreds of nanoseconds.
    Mesh-Begriff(e) Absorption ; DNA/metabolism ; DNA Repair ; Ligands ; Light ; Organometallic Compounds/chemistry ; Spectrophotometry
    Chemische Substanzen Ligands ; Organometallic Compounds ; tris(2,2'-bipyridyl)ruthenium(II) ; DNA (9007-49-2)
    Sprache Englisch
    Erscheinungsdatum 2012-04
    Erscheinungsland England
    Dokumenttyp Journal Article ; Research Support, Non-U.S. Gov't
    ZDB-ID 2072584-X
    ISSN 1474-9092 ; 1474-905X
    ISSN (online) 1474-9092
    ISSN 1474-905X
    DOI 10.1039/c2pp05333k
    Datenquelle MEDical Literature Analysis and Retrieval System OnLINE

    Zusatzmaterialien

    Kategorien

  10. Artikel: Ultrafast Oxidation of a Tyrosine by Proton-Coupled Electron Transfer Promotes Light Activation of an Animal-like Cryptochrome

    Lacombat, Fabien / Espagne, Agathe / Dozova, Nadia / Plaza, Pascal / Müller, Pavel / Brettel, Klaus / Franz-Badur, Sophie / Essen, Lars-Oliver

    Journal of the American Chemical Society. 2019 Aug. 01, v. 141, no. 34

    2019  

    Abstract: The animal-like cryptochrome of Chlamydomonas reinhardtii (CraCRY) is a recently discovered photoreceptor that controls the transcriptional profile and sexual life cycle of this alga by both blue and red light. CraCRY has the uncommon feature of ... ...

    Abstract The animal-like cryptochrome of Chlamydomonas reinhardtii (CraCRY) is a recently discovered photoreceptor that controls the transcriptional profile and sexual life cycle of this alga by both blue and red light. CraCRY has the uncommon feature of efficient formation and longevity of the semireduced neutral form of its FAD cofactor upon blue light illumination. Tyrosine Y373 plays a crucial role by elongating , as fourth member, the electron transfer (ET) chain found in most other cryptochromes and DNA photolyases, which comprises a conserved tryptophan triad. Here, we report the full mechanism of light-induced FADH• formation in CraCRY using transient absorption spectroscopy from hundreds of femtoseconds to seconds. Electron transfer starts from ultrafast reduction of excited FAD to FAD•– by the proximal tryptophan (0.4 ps) and is followed by delocalized migration of the produced WH•+ radical along the tryptophan triad (∼4 and ∼50 ps). Oxidation of Y373 by coupled ET to WH•+ and deprotonation then proceeds in ∼800 ps, without any significant kinetic isotope effect, nor a pH effect between pH 6.5 and 9.0. The FAD•–/Y373• pair is formed with high quantum yield (∼60%); its intrinsic decay by recombination is slow (∼50 ms), favoring reduction of Y373• by extrinsic agents and protonation of FAD•– to form the long-lived, red-light absorbing FADH• species. Possible mechanisms of tyrosine oxidation by ultrafast proton-coupled ET in CraCRY, a process about 40 times faster than the archetypal tyrosine-Z oxidation in photosystem II, are discussed in detail.
    Schlagwörter Chlamydomonas reinhardtii ; algae ; blue light ; cryptochromes ; deoxyribodipyrimidine photo-lyase ; deprotonation ; electron transfer ; isotopes ; lighting ; longevity ; oxidation ; pH ; photoreceptors ; photosystem II ; protonation ; red light ; spectroscopy ; transcription (genetics) ; tryptophan ; tyrosine
    Sprache Englisch
    Erscheinungsverlauf 2019-0801
    Umfang p. 13394-13409.
    Erscheinungsort American Chemical Society
    Dokumenttyp Artikel
    ZDB-ID 3155-0
    ISSN 1520-5126 ; 0002-7863
    ISSN (online) 1520-5126
    ISSN 0002-7863
    DOI 10.1021/jacs.9b03680
    Datenquelle NAL Katalog (AGRICOLA)

    Zusatzmaterialien

    Kategorien

Zum Seitenanfang