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Národní úložiště šedé literatury Nalezeno 2 záznamů.  Hledání trvalo 0.00 vteřin. 
The regulatory role of cyanobacterial High light inducible proteins
 SHUKLA, Mahendra Kumar
The aim of the thesis was to elucidate the role of High light inducible proteins (Hlips) in the protection/regulation of the biogenesis of photosynthesis machinery. During the project two Hlip proteins (HliC and HliD) were isolated from the cyanobacterium Synechocystis PCC 6803; either as a pure oligomer (HliC protein) or as a small complex with a putative Photosystem II assembly factor Ycf39 (HliD protein). Pigments bound to purified Hlips were analyzed by state-of-art spectroscopic techniques to elucidate the mechanism of thermal energy dissipation. In addition, this work explained the mechanism of how the HliC protein regulates the interaction between chlorophyll synthase enzyme and the Ycf39 protein. This conceptually new mechanism is based on the replacement of HliD dimers in chlorophyll synthase complexes by stress-induced HliD-HliC heterodimers, which changes the affinity of Ycf39 towards chlorophyll synthase.
Úplný záznam
Biogenesis of Photosystem II in the Model Cyanobacterium Synechocystis sp. PCC 6803 - The Role of Selected Auxiliary Protein Factors and Subcellular Localisation
 KNOPPOVÁ, Jana
This thesis explores localisations and roles of three auxiliary protein factors involved in the biogenesis of Photosystem II (PSII) in the cyanobacterium Synechocystis sp. PCC 6803 and contributes to subcellular localisation of the initial steps of PSII biogenesis and repair-related D1 synthesis. The main results consist in i) identification of a functional interaction of the protein factor Psb27 with a lumenal domain of the Photosystem II subunit CP43, ii) discovery of a novel pigment binding complex formed by the Ycf39 protein and high-light-inducible proteins implicated in photoprotection and delivery of recycled chlorophyll to newly synthesized D1 protein during the PSII reaction centre formation, iii) providing evidence that the early steps of PSII assembly and the repair-related D1 synthesis occur in the thylakoid membrane of Synechocystis, and iv) revealing that the cyanobacterial PsbP orthologue, CyanoP, assists in the early phase of PSII biogenesis as an assembly factor facilitating the association of D2 and D1 assembly modules.
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