All4312, encoded by open reading frame all4312 in the genome of the heterocyst-forming cyanobacterium Anabaena sp. strain PCC 7120, exhibits a CheY-like receiver domain and an output domain similar to that of OmpR, characteristic of two-component response regulators. Expression of all4312 was directly regulated by NtcA, the global transcriptional regulator of nitrogen assimilation in cyanobacte...

We look at the possibility to compute and understand the color change occurring upon mutation of a photochromic protein. Accordingly, ab initio multiconfigurational quantum chemical methods are used to construct basic quantum-mechanics/molecular-mechanics (QM/MM) models for a small mutant library of the sensory rhodopsin of Anabaena (Nostoc) sp. PCC7120 cyanobacterium. Together with the wild-ty...

Over the past year, two complete genome sequences of the cyanobacteria (filamentous nitrogen-fixing cyanobacterium Anabaena sp. PCC7120 [3] and thermophilic cyanobacterium Thermosynechococcus elongatus BP-1 [6]) became available in addition to the Synechocystis sp. PCC6803 genome [4]. Additionally, five species are in draft to finishing phase and other eight genome projects are also in progress...

Capillary electrophoresis single-strand conformational polymorphism (CE-SSCP) was explored as a fast and inexpensive method to differentiate both prokaryotic (blue-green) and eukaryotic (green and brown) algae. A selection of two blue-green algae (Nostoc muscorum and Anabaena inaequalis), five green algae (Chlorella vulgaris, Oedogonium foveolatum, Mougeotia sp., Scenedesmus quadricauda, and Ul...

Cyanobacteria are able to produce extracellular substances with different biological activities and behaviors. The marine cyanobacteria Anabaena sp. strain Hi 26 and Oscillatoria subtilissima strain Bo 62 cause significant color changes in their growth media, while viscosity of the medium is influenced by Rivularia sp. strain Bo 85 and Oscillatoria limnetica strain Flo 1. Sterile-filtered media...

A DNA-binding protein has been isolated from two cyanobacteria (blue-green algae): Anabaena sp and Aphanocapsa sp. It has a molecular weight as determined by sodium dodecyl sulfate polyacrylamide gel electrophoresis of about 10,000, is rich in lysine and arginine, and lacks tyrosine, tryptophan, and cysteine. The proteins from both strains show immunological identity with a similar DNA-binding ...