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Maksimov, V. V.; Shchetinina, E. V.; Kraikivskaya, O. V.; Максимов, В. И.; Maksimova, E. A.

doi:10.1023/a:1020571122456

Cited by 7 publications

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“…In contrast, addition of Apo-RCP to COCP caused dramatic changes of the absorption spectrum (Figure 4A) indicating rearrangement of the chromophore's local environment. Surprisingly, the difference between the absorption spectra of COCP and mixtures with Apo-RCP is very similar to the light-minus-dark absorbance spectrum of full-length OCP (8,32,33). Indeed, the vibronic substructure characteristic for OCP in the orange form appears upon addition of Apo-RCP to COCP, revealing peaks and shoulders at 498, 468 and 437 nm (Figure 4A).…”

Section: Reassembly Of a Photoactive Ocp From Functional Modulesmentioning

confidence: 67%

Assembly of photoactive orange carotenoid protein from its domains unravels a carotenoid shuttle mechanism

et al. 2017

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The photoswitchable orange carotenoid protein (OCP) is indispensable for cyanobacterial photoprotection by quenching phycobilisome fluorescence upon photoconversion from the orange OCP to the red OCP form. Cyanobacterial genomes frequently harbor, besides genes for orange carotenoid proteins (OCPs), several genes encoding homologs of OCP's N- or C-terminal domains (NTD, CTD). Unlike the well-studied NTD homologs, called Red Carotenoid Proteins (RCPs), the role of CTD homologs remains elusive. We show how OCP can be reassembled from its functional domains. Expression of Synechocystis OCP-CTD in carotenoid-producing Escherichia coli yielded violet-colored proteins, which, upon mixing with the RCP-apoprotein, produced an orange-like photoswitchable form that further photoconverted into a species that quenches phycobilisome fluorescence and is spectroscopically indistinguishable from RCP, thus demonstrating a unique carotenoid shuttle mechanism. Spontaneous carotenoid transfer also occurs between canthaxanthin-coordinating OCP-CTD and the OCP apoprotein resulting in formation of photoactive OCP. The OCP-CTD itself is a novel, dimeric carotenoid-binding protein, which can coordinate canthaxanthin and zeaxanthin, effectively quenches singlet oxygen and interacts with the Fluorescence Recovery Protein. These findings assign physiological roles to the multitude of CTD homologs in cyanobacteria and explain the evolutionary process of OCP formation.

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Section: Reassembly Of a Photoactive Ocp From Functional Modulesmentioning

confidence: 67%

Assembly of photoactive orange carotenoid protein from its domains unravels a carotenoid shuttle mechanism

et al. 2017

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“…The activation energy for Li + migration and the conductivity at 298 K for the Li 3 À 2x Cr 2 À x Ta x (PO 4 ) 3 system. rhombohedral [26] and Li 3 M 2 (PO 4 ) 3 , (M = Sc and Fe) for the monoclinic [27,28] 3 . The Li + -O distance was not same for each coordinated oxygen in the monoclinic structure.…”

Section: Lim III M V (Po 4 ) 3 M Iii M V =Crta Alta Crnb Alnb Gmentioning

confidence: 99%

Ionic conductivity and crystal structure for the Li3−2xCr2−xTax(PO4)3 system

Aono¹

2004

Solid State Ionics

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“…In the general case, it is assumed that K 1 > K 2 ; that is, the preferable action of orientational forces along the axes of macromolecules is admitted. The constants K 1 and K 2 for polar and nonpolar chains were evaluated in ref .…”

Section: Modelingmentioning

confidence: 99%

“…Such systems are characterized by the parallel packing of long axes of molecules, while short axes either are randomly oriented in the plane perpendicular to the long axis or form an ordered structure in which the order−disorder transition is possible. Therefore, the structure and molecular dynamics of such systems can be described in terms of the pure two-dimensional model − or the three-dimensional planar-chain model. − …”

Section: Introductionmentioning

confidence: 99%

“…For flexible-chain polymers when the energetic parameters in potential eq are of the same order of magnitude ( K 1 = K 2 ), the critical value of the interchain interaction parameter in three-dimensional polymer systems with isotropic interactions between chain segments (β = 1) is b c0 = 3 C = 1.518 (point A in Figure ), where C = I (1) = 0.506 is the value of the Watson integral…”

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Orientational Order in Nanolayers of Cast Polymer Films

Maksimov

Kusheva

2009

Langmuir

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The spontaneous ordering of fragments of chain molecules near the surface in polymer films is described in terms of the multichain model, which allows for local intra- and interchain segment orientational interactions, as well as for transversal fluctuation of their orientation as an approximation of strong planar orientation order in the layers. Chain packing in the plane-ordered state is impossible unless the interchain interaction parameter has a critical value. This value decreases with chain bending rigidity. The calculated dependences of the limiting values of the quadrupole orientation order parameter on the length of the Kuhn statistical segment describe reasonably well the experimental data obtained in a study of polymer homologue polysaccharides and sulfonated phenyl-containing polymers. The monolayer thickness in films of some polysaccharides and sulfonated phenyl-containing polymers has been calculated from the fit of the theoretical to the experimental data of the surface birefringence on the number of nanolayers.

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Cited by 7 publications

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Assembly of photoactive orange carotenoid protein from its domains unravels a carotenoid shuttle mechanism

Assembly of photoactive orange carotenoid protein from its domains unravels a carotenoid shuttle mechanism

Ionic conductivity and crystal structure for the Li3−2xCr2−xTax(PO4)3 system

Orientational Order in Nanolayers of Cast Polymer Films

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