Результаты поиска по 'cyanobacteria':
Найдено статей: 3
  1. Zlenko D.V., Stadnichuk I.N., Krasilnikov P.M.
    Molecular model of OCP-phycobilisome complex formation
    Computer Research and Modeling, 2014, v. 6, no. 5, pp. 761-774

    A molecular model of phicobilisome complex with a quenching protein OCP which regulates the energy transfer from phicobilisome to photosystem in photosynthetic apparatus of cyanobacteria has been developed. In the model obtained a well known spatial structure of interacting proteins remains intact and also the energy transfer from phycobilisome to OCP with reasonable rates is possible. Free energy of complex formation was calculated using MM–PBSA approach. By the order of magnitude this energy is about tens of kJ/mole. This value correlates well with experimental observed low stability of this complex. The specific surface energy of interaction between hydrophylic phicobilisome and OCP is twice larger than specific surface energy of their interaction with water. This reflects a high molecular complementary of interacting protein surfaces and is a strong pro argument for proposed model.

    Keywords: phycobilisome, OCP, complexation, molecular modeling, free energy, MM–PBSA.
  2. Krasilnikov P.M., Zlenko D.V., Stadnichuk I.N.
    Exciton interaction of the chromophores — a tool to fine-tune the mechanism of non-photochemical quenching of phycobilisome in cyanobacteria
    Computer Research and Modeling, 2015, v. 7, no. 1, pp. 125-144

    It was carried out a theoretical analysis of the energy migration rate in the process of non-photochemical quenching of fluorescence pigment-protein complex that performed by means of orange carotenoid-protein in the phycobilisomes of cyanobacteria. It is shown that the observed rate of energy transfer can not be interpreted in the framework of inductive-resonant mechanism of energy migration (Förster’s theory). On the contrary, according to the calculations the implementation of the exciton mechanism is fully consistent with the experimentally observed high quenching rate. An essential feature of the implementation of the exciton mechanism is to comply with a number of structural and functional conditions that require fine-tuning of the molecular system in the interaction of donor and acceptor molecules both each other and with the local molecular environment.

    Keywords: energy transfer, exciton, transition dipole moment, absorption and fluorescence spectra.
    Views (last year): 2. Citations: 2 (RSCI).
  3. Chesnokova O.I., Melkikh A.V.
    Simulation modeling of directed movement in illumination gradient
    Computer Research and Modeling, 2012, v. 4, no. 2, pp. 401-406

    Simulation multiagent model of artificial life was created. Competitive ad-vantages of directed movement and diverse strategies of its using in population of protozoa in illumination gradient were considered. The results consistent with r-K selection theory were obtained. Agents behavior in artificial ecosystem are in qualitative agreement with behavior observed in nature.

    Keywords: agent-based modeling, directed movement, cyanobacteria.
    Views (last year): 5.

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