Results 71 to 80 of about 2,158,587 (221)

The Cyanotoxin BMAA Induces Heterocyst Specific Gene Expression in Anabaena sp. PCC 7120 under Repressive Conditions

Toxins, 2018
Cyanobacteria synthesize neurotoxic β-N-methylamino-l-alanine (BMAA). The roles of this non-protein amino acid in cyanobacterial cells are insufficiently studied. During diazotrophic growth, filamentous cyanobacteria form single differentiated cells,
Alexandra A. Popova, Tatiana A. Semashko, Natalia V. Kostina, Ulla Rasmussen, Vadim M. Govorun, Olga A. Koksharova   +5 more
doaj   +1 more source

The CRP-family transcriptional regulator DevH regulates expression of heterocyst-specific genes at the later stage of differentiation in the cyanobacterium Anabaena sp. strain PCC 7120

bioRxiv, 2020
Heterocysts are terminally differentiated cells of filamentous cyanobacteria, which are specialized for nitrogen fixation. Because nitrogenase, an enzyme for nitrogen fixation, is easily inactivated by oxygen, the intracellular environment of heterocysts
Yohei Kurio, Y. Koike, Y. Kanesaki, Satoru Watanabe, S. Ehira   +4 more
semanticscholar   +1 more source

Maintenance of heterocyst patterning in a filamentous cyanobacterium [PDF]

, 2010
In the absence of sufficient combined nitrogen, some filamentous cyanobacteria differentiate nitrogenfixing heterocysts at approximately every 10th cell position.
Allen, John S., Callahan, Sean M., Zhu, Mei   +2 more
core   +1 more source

The Heterocyst-Specific NsiR1 Small RNA Is an Early Marker of Cell Differentiation in Cyanobacterial Filaments

mBio, 2014
Differentiation of single cells along filaments of cyanobacteria constitutes one of the simplest developmental patterns in nature. In response to nitrogen deficiency, certain cells located in a semiregular pattern along filaments differentiate into ...
Alicia M. Muro-Pastor
doaj   +1 more source

The First Proteomic Study of Nostoc sp. PCC 7120 Exposed to Cyanotoxin BMAA under Nitrogen Starvation

Toxins, 2020
The oldest prokaryotic photoautotrophic organisms, cyanobacteria, produce many different metabolites. Among them is the water-soluble neurotoxic non-protein amino acid beta-N-methylamino-L-alanine (BMAA), whose biological functions in cyanobacterial ...
Olga A. Koksharova, Ivan O. Butenko, Olga V. Pobeguts, Nina A. Safronova, Vadim M. Govorun   +4 more
doaj   +1 more source

NsrR1, a Nitrogen stress-repressed sRNA, contributes to the regulation of nblA in Nostoc sp. PCC 7120 [PDF]

, 2018
Small regulatory RNAs (sRNAs) are currently considered as major post-transcriptional regulators of gene expression in bacteria. The interplay between sRNAs and transcription factors leads to complex regulatory networks in which both transcription factors
Muro Pastor, Alicia María, Vioque Peña, Agustín, Álvarez Escribano, Isidro   +2 more
core   +3 more sources

Surveying DNA Elements within Functional Genes of Heterocyst-Forming Cyanobacteria.

PLoS ONE, 2016
Some cyanobacteria are capable of differentiating a variety of cell types in response to environmental factors. For instance, in low nitrogen conditions, some cyanobacteria form heterocysts, which are specialized for N2 fixation.
Jason A Hilton, John C Meeks, Jonathan P Zehr   +2 more
doaj   +1 more source

Identification of a gene regulated by HetR, a master regulator of heterocyst differentiation, in the non-heterocyst-forming filamentous cyanobacterium Arthrospira platensis NIES-39.

Journal of General and Applied Microbiology, 2019
Cyanobacteria are a morphologically and physiologically diverse group of bacteria, which contains unicellular and multicellular filamentous strains. Some filamentous cyanobacteria, such as Anabaena sp. strain PCC 7120, form a differentiated cell called a
Ryoji Koike, Yuichi Kato, S. Ehira
semanticscholar   +1 more source

Formation and maintenance of nitrogen-fixing cell patterns in filamentous cyanobacteria [PDF]

, 2016
Cyanobacteria forming one-dimensional filaments are paradigmaticmodel organisms of the transition between unicellular andmulticellular living forms. Under nitrogen-limiting conditions, infilaments of the genus Anabaena, some cells differentiate into ...
Ares García, Saúl, Muñoz-García, Javier   +1 more
core   +2 more sources

ABC Transporter Required for Intercellular Transfer of Developmental Signals in a Heterocystous Cyanobacterium [PDF]

, 2015
In the filamentous cyanobacterium Anabaena, patS and hetN encode peptide-derived signals with many of the properties of morphogens. These signals regulate the formation of a periodic pattern of heterocysts by lateral inhibition of differentiation. Here
Callahan, Sean M., Higa, Kelly C., Rivers, Orion S., Videau, Patrick   +3 more
core   +2 more sources