Results 51 to 60 of about 7,938 (254)

The ABC Transporter Components HgdB and HgdC are Important for Glycolipid Layer Composition and Function of Heterocysts in Anabaena sp. PCC 7120

Life, 2018
Anabaena sp. PCC 7120 is a filamentous cyanobacterium able to fix atmospheric nitrogen in semi-regularly spaced heterocysts. For correct heterocyst function, a special cell envelope consisting of a glycolipid layer and a polysaccharide layer is essential.
Dmitry Shvarev, Carolina N. Nishi, Lars Wörmer, Iris Maldener   +3 more
doaj   +1 more source

The Nitrogen Stress-Repressed sRNA NsrR1 Regulates Expression of all1871, a Gene Required for Diazotrophic Growth in Nostoc sp. PCC 7120

Life, 2020
Small regulatory RNAs (sRNAs) are post-transcriptional regulators of bacterial gene expression. In cyanobacteria, the responses to nitrogen availability, that are mostly controlled at the transcriptional level by NtcA, involve also at least two small ...
Isidro Álvarez-Escribano, Manuel Brenes-Álvarez, Elvira Olmedo-Verd, Agustín Vioque, Alicia M. Muro-Pastor   +4 more
doaj   +1 more source

The Dual Role of the Glycolipid Envelope in Different Cell Types of the Multicellular Cyanobacterium Anabaena variabilis ATCC 29413

Frontiers in Microbiology, 2021
Anabaena variabilis is a filamentous cyanobacterium that is capable to differentiate specialized cells, the heterocysts and akinetes, to survive under different stress conditions.
Ritu Garg, Iris Maldener
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

Heterocyst placement strategies to maximize growth of cyanobacterial filaments

, 2012
Under conditions of limited fixed-nitrogen, some filamentous cyanobacteria develop a regular pattern of heterocyst cells that fix nitrogen for the remaining vegetative cells.
Aidan I Brown, Andrew D Rutenberg, Brown A I, Fogg G E, Gibson C E, Herrero A, Popa R, Powell E O, Risser D D, Stumm W, Wetzel R G   +10 more
core   +1 more source

A polyketide synthase HglEA, but not HglE2, synthesizes heterocyst specific glycolipids in Anabaena sp. PCC 7120.

Journal of General and Applied Microbiology, 2020
Heterocysts are the specialized cells for nitrogen fixation in some filamentous cyanobacteria. To protect the oxygen labile nitrogen fixing enzyme, nitrogenase, heterocysts keep their inner environment microoxic by developing layers of barrier on the ...
Tsukasa Saito, K. Awai
semanticscholar   +1 more source

Uncovering the Unusual Long Chains of Vegetative Cells within Single Colonies of the Dryland Nitrogen-Fixing Cyanobacterium Nostoc flagelliforme

Nitrogen
Heterocyst-forming cyanobacteria that colonize the drylands contribute to carbon and nitrogen supplies in nutrient-poor soils. As one of the representative cyanobacteria, Nostoc flagelliforme adapts well to the arid environment in the form of filamentous
Xiang Gao, Chang Liu, Wensheng Liang
doaj   +1 more source

Predicted glycosyl transferase genes located outside the HEP island are required for formation of heterocyst envelope polysaccharide in Anabaena sp strain PCC 7120 [PDF]

, 2007
During maturation, heterocysts form an envelope layer of polysaccharide, called heterocyst envelope polysaccharide (HEP), whose synthesis depends on a cluster of genes, the HEP island, and on an additional, distant gene, hepB, or a gene immediately ...
Wang, Yu, Lechno-Yossef, Sigal, Gong, Yangmin, Fan, Qing, Wolk, Peter, Xu, Xudong, Xu, XD, Chinese Acad Sci, Inst Hydrobiol, State Key Lab Freshwater Ecol & Biotechnol, Wuhan 430072, Peoples R China   +6 more
core   +1 more source

Elements of the heterocyst-specific transcriptome unravelled by co-expression analysis in Nostoc sp. PCC 7120.

Environmental Microbiology, 2019
Nitrogen is frequently limiting microbial growth in the environment. As a response, many filamentous cyanobacteria differentiate heterocysts, cells devoted to N2 fixation.
Manuel Brenes-Álvarez, J. Mitschke, Elvira Olmedo-Verd, J. Georg, W. Hess, A. Vioque, A. Muro-Pastor   +6 more
semanticscholar   +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