In this study, the influence of halide ions on [7.7]paracyclophane biosynthesis in the cyanobacterium Nostoc sp. CAVN2 was investigated. In contrast to KI and KF, supplementation of the culture medium with KCl or KBr resulted not only in an increase of growth but also in an up-regulation of carbamidocyclophane production. LC-MS analysis indicated the presence of chlorinated, brominated, but als...

Nostoc colonies have been used as food and medicine for centuries, and their main supporting matrix is polysaccharides, which help Nostoc cells resist various environmental stresses including oxidative stress. Here we isolated a polysaccharide, nostoglycan, from cultured Nostocsphaeroides colonies and determined its physicochemical properties, which revealed a characteristic infrared absorption...

This study focuses on Ultra Violet stress (UVS) gene product which is a UV stress induced protein from cyanobacteria, Synechocystis PCC 6803. Three dimensional structural modeling of target UVS protein was carried out by homology modeling method. 3F2I pdb from Nostoc sp. PCC 7120 was selected as a suitable template protein structure. Ultimately, the detection of active binding regions was carri...

The objective of this study was to characterize the community structure and activity of N2-fixing microorganisms in mature and poorly developed biological soil crusts from both the Colorado Plateau and Chihuahuan Desert. Nitrogenase activity was approximately 10 and 2.5 times higher in mature crusts than in poorly developed crusts at the Colorado Plateau site and Chihuahuan Desert site, respect...

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a Department of Economics, Lingnan University, Dorothy YL Wong Building, 8 Castle Peak Road, Tuen Mun, Hong Kong SAR b Center for Chinese Agricultural Policy, Institute of Geographical Sciences and Natural Resources Research, Chinese Academy of Sciences, No Jia11, Datun Road, Anwai, Chaoyang District, Beijing 100101, China c Freeman Spogli Institute for International Studies, Stanford Universit...

Intact akinetes (spores) of the cyanobacterium Nostoc spongiaeforme can be isolated free of vegetative cells and heterocysts. The akinetes remain viable for at least 2 weeks in distilled water. They do not germinate in water but do so readily when transferred subsequently to cyanobacterial growth medium. Isolated, nongerminating akinetes incorporated 35S from Na235SO4 into protein and lipid. Si...