Transgenically Produced Glycinebetaine Protects Ribulose 1,5-bisphosphate Carboxylase/Oxygenase from Inactivation in Synechococcus sp. PCC7942 under Salt Stress
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چکیده
منابع مشابه
Kinetics and subunit interactions of ribulose bisphosphate carboxylase-oxygenase from the cyanobacterium, Synechococcus sp.
Ribulose 1,5-bisphosphate carboxylase-oxygenase was purified to electrophoretic homogeneity from the unicellular, marine cyanobacterium, Synechococcus sp. It was composed of large (57,000 dalton) and small (12,000 dalton) subunits in a 1:l stoichiometry. It was rapidly activated by M&‘ plus HC03-, even in the presence of ribulose 1,5-bisphosphate which had no effect on the extent of activatio...
متن کاملMolecular structure and enzymatic function of lycopene cyclase from the cyanobacterium Synechococcus sp strain PCC7942.
A gene encoding the enzyme lycopene cyclase in the cyanobacterium Synechococcus sp strain PCC7942 was mapped by genetic complementation, cloned, and sequenced. This gene, which we have named crtL, was expressed in strains of Escherichia coli that were genetically engineered to accumulate the carotenoid precursors lycopene, neurosporene, and zeta-carotene. The crtL gene product converts the acyc...
متن کاملRbcX can function as a rubisco chaperonin, but is non-essential in Synechococcus PCC7942.
In most cyanobacteria, the gene rbcX is co-transcribed with the rbcL and rbcS genes that code for the large and small subunits of ribulose-1,5-bisphosphate carboxylase/oxygenase (Rubisco). Previous co-expression studies in Escherichia coli of cyanobacterial Rubisco and RbcX have identified a chaperonin-like function for RbcX. The organization of the rbcLXS operon has, to a certain extent, precl...
متن کاملMobilization of photosystem II induced by intense red light in the Cyanobacterium Synechococcus sp PCC7942.
We use confocal fluorescence microscopy and fluorescence recovery after photobleaching to show that a specific light signal controls the diffusion of a protein complex in thylakoid membranes of the cyanobacterium Synechococcus sp PCC7942 in vivo. In low light, photosystem II appears completely immobile in the membrane. However, exposure to intense red light triggers rapid diffusion of up to app...
متن کاملGlycinebetaine counteracts the inhibitory effects of salt stress on the degradation and synthesis of D1 protein during photoinhibition in Synechococcus sp. PCC 7942.
Glycinebetaine (hereafter referred to as betaine) is a compatible solute that accumulates in certain plants and microorganisms in response to various types of stress. We demonstrated previously that when the cyanobacterium Synechococcus sp. PCC 7942 (hereafter Synechococcus) is transformed with the codA gene for choline oxidase, it can synthesize betaine from exogenously supplied choline, exhib...
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ژورنال
عنوان ژورنال: Plant and Cell Physiology
سال: 1998
ISSN: 0032-0781,1471-9053
DOI: 10.1093/oxfordjournals.pcp.a029386