Strain PCC 7120 Heterocyst Distribution in Anabaena sp . Function of the HetN Factor Influencing Subcellular Localization
نویسندگان
چکیده
منابع مشابه
Expression of Shewanella oneidensis MR-1 [FeFe]-hydrogenase genes in Anabaena sp. strain PCC 7120.
H(2) generated from renewable resources holds promise as an environmentally innocuous fuel that releases only energy and water when consumed. In biotechnology, photoautotrophic oxygenic diazotrophs could produce H(2) from water and sunlight using the cells' endogenous nitrogenases. However, nitrogenases have low turnover numbers and require large amounts of ATP. [FeFe]-hydrogenases found in oth...
متن کاملCharacterizationofHetN, a protein involved in heterocyst di¡erentiation in the cyanobacteriumAnabaena sp. strainPCC7120
HetN, a putative ketoacyl reductase, is required for heterocyst pattern maintenance in the filamentous cyanobacterium Anabaena sp. strain PCC 7120. The hetN gene, when present on a multicopy plasmid, is able to suppress heterocyst differentiation. Little is known about the biochemical properties of HetN. In the present study, we found that HetN could hydrolyze ATP or GTP in vitro, and that this...
متن کاملpatS minigenes inhibit heterocyst development of Anabaena sp. strain PCC 7120.
The patS gene encodes a small peptide that is required for normal heterocyst pattern formation in the cyanobacterium Anabaena sp. strain PCC 7120. PatS is proposed to control the heterocyst pattern by lateral inhibition. patS minigenes were constructed and expressed by different developmentally regulated promoters to gain further insight into PatS signaling. patS minigenes patS4 to patS8 encode...
متن کاملEpistasis analysis of four genes from Anabaena sp. strain PCC 7120 suggests a connection between PatA and PatS in heterocyst pattern formation.
The hetR, patA, hetN, and patS genes are part of a regulatory network that regulates the differentiation and patterning of heterocysts in the filamentous cyanobacterium Anabaena sp. strain PCC 7120. In this report, the epistatic interactions of mutant alleles of these four genes have been used to refine our understanding of their relationships to one another. The hetR gene was necessary for dif...
متن کاملRelationships between the ABC-Exporter HetC and Peptides that Regulate the Spatiotemporal Pattern of Heterocyst Distribution in Anabaena
In the model cyanobacterium Anabaena sp. PCC 7120, cells called heterocysts that are specialized in the fixation of atmospheric nitrogen differentiate from vegetative cells of the filament in the absence of combined nitrogen. Heterocysts follow a specific distribution pattern along the filament, and a number of regulators have been identified that influence the heterocyst pattern. PatS and HetN...
متن کامل