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Homologous overexpression of NpDps2 and NpDps5 increases the tolerance for oxidative stress in the multicellular cyanobacterium Nostoc punctiforme.
Li X, Mustila H, Magnuson A, Stensjö K. Li X, et al. FEMS Microbiol Lett. 2018 Sep 1;365(18):fny198. doi: 10.1093/femsle/fny198. FEMS Microbiol Lett. 2018. PMID: 30107525 Free PMC article.
However, overexpression of the heterocyst-specific NpDps5 in all cells of the filament led to a higher amount of chlorophyll-binding proteins per cell during diazotrophic growth. ...
However, overexpression of the heterocyst-specific NpDps5 in all cells of the filament led to a higher amount of chlorophyll-binding …
Isolation and characterization of thylakoid membranes from the filamentous cyanobacterium Nostoc punctiforme.
Cardona T, Battchikova N, Agervald A, Zhang P, Nagel E, Aro EM, Styring S, Lindblad P, Magnuson A. Cardona T, et al. Physiol Plant. 2007 Dec;131(4):622-34. doi: 10.1111/j.1399-3054.2007.00982.x. Physiol Plant. 2007. PMID: 18251853
Nostoc punctiforme strain Pasteur Culture Collection (PCC) 73102, a sequenced filamentous cyanobacterium capable of nitrogen fixation, is used as a model organism for characterization of bioenergetic processes during nitrogen fixation in Nostoc. A protocol fo …
Nostoc punctiforme strain Pasteur Culture Collection (PCC) 73102, a sequenced filamentous cyanobacterium capable of nitrogen fixation …
Electron transfer protein complexes in the thylakoid membranes of heterocysts from the cyanobacterium Nostoc punctiforme.
Cardona T, Battchikova N, Zhang P, Stensjö K, Aro EM, Lindblad P, Magnuson A. Cardona T, et al. Biochim Biophys Acta. 2009 Apr;1787(4):252-63. doi: 10.1016/j.bbabio.2009.01.015. Epub 2009 Jan 30. Biochim Biophys Acta. 2009. PMID: 19366613
Nitrogen fixation takes place in heterocysts that differentiate as a result of nitrogen starvation. Heterocysts uphold a microoxic environment to avoid inactivation of nitrogenase, e.g. by downregulation of oxygenic photosynthesis. ...We could identify a sign …
Nitrogen fixation takes place in heterocysts that differentiate as a result of nitrogen starvation. Heterocysts uphold a micro …
Excitation energy transfer to Photosystem I in filaments and heterocysts of Nostoc punctiforme.
Cardona T, Magnuson A. Cardona T, et al. Biochim Biophys Acta. 2010 Mar;1797(3):425-33. doi: 10.1016/j.bbabio.2009.12.014. Epub 2009 Dec 28. Biochim Biophys Acta. 2010. PMID: 20036211
However, illumination with 560nm light caused quenching of the emission from the terminal emitter, with a simultaneous increase in the emission at 750nm, indicating that the 560nm pre-illumination caused trimerization of Photosystem I. ...
However, illumination with 560nm light caused quenching of the emission from the terminal emitter, with a simultaneous increase in th …
Modeling Photosystem I with the alternative reaction center protein PsaB2 in the nitrogen fixing cyanobacterium Nostoc punctiforme.
Magnuson A, Krassen H, Stensjö K, Ho FM, Styring S. Magnuson A, et al. Biochim Biophys Acta. 2011 Sep;1807(9):1152-61. doi: 10.1016/j.bbabio.2011.05.004. Epub 2011 May 14. Biochim Biophys Acta. 2011. PMID: 21605545
The protein, PsaB2, was recently identified in heterocysts of Nostoc punctiforme sp. strain PCC 73102. 12 conserved amino acid replacements and one insertion, were identified by a multiple sequence alignment of several PsaB2 and PsaB1 sequences. ...
The protein, PsaB2, was recently identified in heterocysts of Nostoc punctiforme sp. strain PCC 73102. 12 conserved amino acid replacements …
Isolation and characterization of the small subunit of the uptake hydrogenase from the cyanobacterium Nostoc punctiforme.
Raleiras P, Kellers P, Lindblad P, Styring S, Magnuson A. Raleiras P, et al. J Biol Chem. 2013 Jun 21;288(25):18345-52. doi: 10.1074/jbc.M113.468587. Epub 2013 May 6. J Biol Chem. 2013. PMID: 23649626 Free PMC article.
Nostoc punctiforme ATCC 29133 is a filamentous cyanobacterium that expresses the uptake hydrogenase HupSL in heterocysts under nitrogen-fixing conditions. ...The EPR spectrum of the oxidized f-HupS shows a narrow g = 2.023 resonance, characteristic of a low-s …
Nostoc punctiforme ATCC 29133 is a filamentous cyanobacterium that expresses the uptake hydrogenase HupSL in heterocysts under nitrog …
Photoinduced reduction of the medial FeS center in the hydrogenase small subunit HupS from Nostoc punctiforme.
Raleiras P, Hammarström L, Lindblad P, Styring S, Magnuson A. Raleiras P, et al. J Inorg Biochem. 2015 Jul;148:57-61. doi: 10.1016/j.jinorgbio.2015.03.018. Epub 2015 Apr 14. J Inorg Biochem. 2015. PMID: 25912316
Styring, A. Magnuson, J. Biol. Chem. 288 (2013) 18,345-18,352). Here, we have used flash photolysis to reduce the iron-sulfur clusters in the isolated small subunit, HupS. ...
Styring, A. Magnuson, J. Biol. Chem. 288 (2013) 18,345-18,352). Here, we have used flash photolysis to reduce the iron-sulfur …
The two Dps proteins, NpDps2 and NpDps5, are involved in light-induced oxidative stress tolerance in the N2-fixing cyanobacterium Nostoc punctiforme.
Moparthi VK, Li X, Vavitsas K, Dzhygyr I, Sandh G, Magnuson A, Stensjö K. Moparthi VK, et al. Biochim Biophys Acta. 2016 Nov;1857(11):1766-1776. doi: 10.1016/j.bbabio.2016.08.003. Epub 2016 Aug 12. Biochim Biophys Acta. 2016. PMID: 27528559
They play a major role in oxidative stress protection and iron homeostasis. The filamentous, heterocyst-forming Nostoc punctiforme, has five Dps proteins. ...Two mutants defective in Dps2 and Dps5 activity displayed a reduced fitness under increased illumination, as …
They play a major role in oxidative stress protection and iron homeostasis. The filamentous, heterocyst-forming Nostoc punctiforme, h …
Heterocyst Thylakoid Bioenergetics.
Magnuson A. Magnuson A. Life (Basel). 2019 Jan 25;9(1):13. doi: 10.3390/life9010013. Life (Basel). 2019. PMID: 30691012 Free PMC article. Review.
Their role is to maintain a microoxic environment for the nitrogenase enzyme during diazotrophic growth. The lack of photosynthetic water oxidation in the heterocyst puts special constraints on the energetics for nitrogen fixation, and the electron transport pathways of he …
Their role is to maintain a microoxic environment for the nitrogenase enzyme during diazotrophic growth. The lack of photosynthetic w …
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