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Nitrogen Control in Cyanobacteria
Nitrogen control in cyanobacteria is mediated by NtcA, a transcriptional regulator which belongs to the CAP (the catabolite gene activator or cyclic AMP [cAMP] receptor protein) family and is therefore different from the well-characterized Ntr system.
Cellular differentiation and the NtcA transcription factor in filamentous cyanobacteria.
The different features found in the NtcA-dependent promoters, together with the cellular level of active NTCA protein, should have a role in the determination of the hierarchy of gene activation during the process of heterocyst differentiation.
Reduction of conjugal transfer efficiency by three restriction activities of Anabaena sp. strain PCC 7120
The efficiency of conjugal transfer of plasmids from Escherichia coli to the cyanobacterium Anabaena sp. strain PCC 7120 was quantitated as a function of the number of restriction sites for the
Dynamics of transcriptional start site selection during nitrogen stress-induced cell differentiation in Anabaena sp. PCC7120
A genome-wide map of >10,000 transcriptional start sites (TSS) of Anabaena sp.
Mutual dependence of the expression of the cell differentiation regulatory protein HetR and the global nitrogen regulator NtcA during heterocyst development
A mutual dependency in the induction of the regulatory genes hetR and ntcA that takes place in response to nitrogen step‐down in Anabaena cells is indicated.
Ammonium/Methylammonium Permeases of a Cyanobacterium
Three putativeamt genes that are found in the recently published complete sequence of the chromosome of strain PCC 6803 were inactivated by insertion of antibiotic resistance-encoding gene-cassettes and the corresponding mutant strains were impaired in uptake of [14C]methylammonium.
Septum-Localized Protein Required for Filament Integrity and Diazotrophy in the Heterocyst-Forming Cyanobacterium Anabaena sp. Strain PCC 7120
SepJ is a novel composite protein needed for filament integrity, proper heterocyst development, and diazotrophic growth and it is observed that in mature heterocysts and vegetative cells, the protein is localized at the intercellular septa, and when cell division starts, it is localized in a ring whose position is similar to that of a Z ring.
The hetC Gene Is a Direct Target of the NtcA Transcriptional Regulator in Cyanobacterial Heterocyst Development
Activation of expression of hetC during heterocyst development appears thus to be directly operated by NtcA, indicating that HetC is not an NTCA-dependent element required for hetR induction.
Acyl-ACP thioesterases from castor (Ricinus communis L.): an enzymatic system appropriate for high rates of oil synthesis and accumulation.
The expression profile of these genes displayed the highest levels in expanding tissues that typically are very active in lipid biosynthesis such as developing seed endosperm and young expanding leaves and the contribution of these two enzymes to the synthesis of castor oil is discussed.
Identification of a furA cis antisense RNA in the cyanobacterium Anabaena sp. PCC 7120.
Increased expression of FurA in a mutant unable to produce the longer message showed that this transcript acted as an antisense RNA (alpha-furA RNA) interfering with furA transcript translation thus contributing to determine cellular levels of Fur A protein.