title: Energy transfer pathways among phycobilin chromophores and fluorescence emission spectra of the phycobilisome core at 293 and 77 K.
abstract: Energy transfer pathways between phycobiliproteins chromophores in the phycobilisome (PBS) core of the cyanobacterium Synechocystis sp. PCC 6803 were investigated. The computer 3D model of the PBS core with determination of chromophore to chromophore distance was created. Our kinetic equations based on this model allowed us to describe the relative intensities of the fluorescence emission of the short(peaked at 665 nm) and long-wavelength (peaked at 680 nm) chromophores in the PBS core at low and room temperatures. The difference of emissions of the PBS core at 77 and 293 K are due to the back energy transfer, which is observed at room temperature and is negligible at 77 K.
authors.affiliation: Moscow State University, Moscow, 119991, Russia.
authors.forename: V I
authors.initials: VI
authors.lastname: Stadnichuk
authors.affiliation: Moscow State University, Moscow, 119991, Russia.
authors.forename: E P
authors.initials: EP
authors.lastname: Lukashev
authors.affiliation: Institute of Basic Biological Problems, Russian Academy of Sciences, ul. Institutskaya 2, Pushchino, Moscow oblast, 142290, Russia.
authors.forename: M F
authors.initials: MF
authors.lastname: Yanyushin
authors.affiliation: Moscow State University, Moscow, 119991, Russia.
authors.forename: D V
authors.initials: DV
authors.lastname: Zlenko
authors.affiliation: Moscow State University, Moscow, 119991, Russia.
authors.forename: E M
authors.initials: EM
authors.lastname: Muronez
authors.affiliation: Timiryazev Institute of Plant Physiology, Russian Academy of Sciences, ul. Botanicheskaya 35, Moscow, 127726, Russia. stadnichuk@mail.ru.
authors.forename: I N
authors.initials: IN
authors.lastname: Stadnichuk
authors.affiliation: Moscow State University, Moscow, 119991, Russia.
authors.forename: P M
authors.initials: PM
authors.lastname: Krasilnikov
mesh_terms: D000595:Amino Acid Sequence; D004735:Energy Transfer; D008969:Molecular Sequence Data; D045524:Phycobilisomes / Q000737:chemistry* / Q000528:radiation effects; D046939:Synechocystis / Q000737:chemistry; D014466:Ultraviolet Rays
chemical_list: D045524:Phycobilisomes