scholarly journals Impaired Photosynthesis in Phosphatidylglycerol-Deficient Mutant of Cyanobacterium Anabaena sp. PCC7120 with a Disrupted Gene Encoding a Putative Phosphatidylglycerophosphatase

2006 ◽  
Vol 141 (4) ◽  
pp. 1274-1283 ◽  
Author(s):  
Feng Wu ◽  
Zhenle Yang ◽  
Tingyun Kuang
Keyword(s):  
Deficient Mutant ◽  
Gene Encoding ◽  
Cyanobacterium Anabaena ◽  
Anabaena Sp

An increase in the level of 2-oxoglutarate promotes heterocyst development in the cyanobacterium Anabaena sp. strain PCC 7120

Microbiology ◽  
2003 ◽  
Vol 149 (11) ◽  
pp. 3257-3263 ◽  
Author(s):  
Jian-Hong Li ◽  
Sophie Laurent ◽  
Viren Konde ◽  
Sylvie Bédu ◽  
Cheng-Cai Zhang
Keyword(s):  
Inorganic Nitrogen ◽  
Cell Types ◽  
Filamentous Cyanobacterium ◽  
Nitrogen Status ◽  
Gene Encoding ◽  
Combined Nitrogen ◽  
Cyanobacterium Anabaena ◽  
Anabaena Sp ◽  
Pcc 7120 ◽  
Heterocyst Development

In the filamentous cyanobacterium Anabaena sp. strain PCC 7120, a starvation of combined nitrogen induces differentiation of heterocysts, cells specialized in nitrogen fixation. How do filaments perceive the limitation of the source of combined nitrogen, and what determines the proportion of heterocysts? In cyanobacteria, 2-oxoglutarate provides a carbon skeleton for the incorporation of inorganic nitrogen. Recently, it has been proposed that the concentration of 2-oxoglutarate reflects the nitrogen status in cyanobacteria. To investigate the effect of 2-oxoglutarate on heterocyst development, a heterologous gene encoding a 2-oxoglutarate permease under the control of a regulated promoter was expressed in Anabaena sp. PCC 7120. The increase of 2-oxoglutarate within cells can trigger heterocyst differentiation in a subpopulation of filaments even in the presence of nitrate. In the absence of a source of combined nitrogen, it can increase heterocyst frequency, advance the timing of commitment to heterocyst development and further increase the proportion of heterocysts in a patS mutant. Here, it is proposed that the intracellular concentration of 2-oxoglutarate is involved in the determination of the proportion of the two cell types according to the carbon/nitrogen status of the filament.

Characterization and responses to environmental cues of a photosynthetic antenna-deficient mutant of the filamentous cyanobacterium Anabaena sp. PCC 7120

2014 ◽  
Vol 171 (11) ◽  
pp. 915-926 ◽  
Author(s):  
Francisco Leganés ◽  
Francisco Martínez-Granero ◽  
M. Ángeles Muñoz-Martín ◽  
Eduardo Marco ◽  
Alberto Jorge ◽  
...  
Keyword(s):  
Environmental Cues ◽  
Filamentous Cyanobacterium ◽  
Deficient Mutant ◽  
Cyanobacterium Anabaena ◽  
Anabaena Sp ◽  
Pcc 7120 ◽  
Photosynthetic Antenna

Constitutive and nitrogen-regulated promoters of the petH gene encoding ferredoxin:NADP+ reductase in the heterocyst-forming cyanobacterium Anabaena sp

FEBS Letters ◽  
1999 ◽  
Vol 449 (2-3) ◽  
pp. 159-164 ◽  
Author(s):  
Ana Valladares ◽  
Alicia M. Muro-Pastor ◽  
María F. Fillat ◽  
Antonia Herrero ◽  
Enrique Flores
Keyword(s):  
Gene Encoding ◽  
Cyanobacterium Anabaena ◽  
Anabaena Sp ◽  
Regulated Promoters

scholarly journals Newly Identified Cytochrome c Oxidase Operon in the Nitrogen-Fixing Cyanobacterium Anabaena sp. Strain PCC 7120 Specifically Induced in Heterocysts

2002 ◽  
Vol 184 (9) ◽  
pp. 2491-2499 ◽  
Author(s):  
Kathryn M. Jones ◽  
Robert Haselkorn
Keyword(s):  
Fluorescent Protein ◽  
Low Oxygen ◽  
Nucleotide Level ◽  
Gene Encoding ◽  
Terminal Oxidases ◽  
Cyanobacterium Anabaena ◽  
Anabaena Sp ◽  
Green Fluorescent ◽  
Pcc 7120 ◽  
Late Stages

ABSTRACT Two operons have been cloned from Anabaena sp. strain PCC 7120 DNA, each of which encodes the three core subunits of distinct mitochondrial-type cytochrome c oxidases. The two operons are only 72 to 85% similar to one another at the nucleotide level in the most conserved subunit. One of these, coxBACII, is induced >20-fold in the middle to late stages of heterocyst differentiation. Analysis of green fluorescent protein reporters indicates that this operon is expressed specifically in proheterocysts and heterocysts. The other operon, coxBACI, is induced only 2.5-fold following nitrogen step-down and is expressed in all cells. Surprisingly, a disruption mutant of coxAII, the gene encoding subunit I of the heterocyst-specific oxidase, grows normally in the absence of combined nitrogen. It is likely that coxBACI and/or two other putative terminal oxidases present in the Anabaena sp. strain PCC 7120 genome are able to compensate for the loss of the heterocyst-specific oxidase in providing ATP for nitrogen fixation and maintaining a low oxygen level in heterocysts.

Isolation and sequence analysis of a gene encoding a basic cytochrome c-553 from the cyanobacterium Anabaena SP. PCC 7937

1992 ◽  
Vol 19 (3) ◽  
pp. 491-492 ◽  
Author(s):  
Arnaud Bovy ◽  
Geert de Vrieze ◽  
Mies Borrias ◽  
Peter Weisbeek
Keyword(s):  
Sequence Analysis ◽  
Cytochrome C ◽  
Gene Encoding ◽  
Cyanobacterium Anabaena ◽  
Anabaena Sp

Expanding the Natural Products Heterologous Expression Repertoire in the Model Cyanobacterium Anabaena sp. Strain PCC 7120: Production of Pendolmycin and Teleocidin B-4

2019 ◽  
Author(s):  
Patrick Videau ◽  
Kaitlyn Wells ◽  
Arun Singh ◽  
Jessie Eiting ◽  
Philip Proteau ◽  
...  
Keyword(s):  
Natural Products ◽  
Genome Mining ◽  
Gene Clusters ◽  
Combinatorial Biosynthesis ◽  
Test Case ◽  
Biosynthetic Gene ◽  
Biosynthetic Gene Clusters ◽  
Cyanobacterium Anabaena ◽  
Anabaena Sp ◽  
Pcc 7120

Cyanobacteria are prolific producers of natural products and genome mining has shown that many orphan biosynthetic gene clusters can be found in sequenced cyanobacterial genomes. New tools and methodologies are required to investigate these biosynthetic gene clusters and here we present the use of <i>Anabaena </i>sp. strain PCC 7120 as a host for combinatorial biosynthesis of natural products using the indolactam natural products (lyngbyatoxin A, pendolmycin, and teleocidin B-4) as a test case. We were able to successfully produce all three compounds using codon optimized genes from Actinobacteria. We also introduce a new plasmid backbone based on the native <i>Anabaena</i>7120 plasmid pCC7120ζ and show that production of teleocidin B-4 can be accomplished using a two-plasmid system, which can be introduced by co-conjugation.

Target Gene Inactivation in Cyanobacterium Anabaena sp. PCC 7120

BIO-PROTOCOL ◽  
2016 ◽  
Vol 6 (15) ◽  
Author(s):  
Kangming Chen ◽  
Huilan Zhu ◽  
Liping Gu ◽  
Shengni Tian ◽  
Ruanbao Zhou
Keyword(s):  
Target Gene ◽  
Gene Inactivation ◽  
Cyanobacterium Anabaena ◽  
Anabaena Sp ◽  
Pcc 7120
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