New fluorescent derivatives of oligopropylamines

Danilovtseva, Elena N.; Verkhozina, O. N.; Zelinskiy, Stanislav N.; Иванов, Н. А.; Tsiganov, Pavel Yu.; Basharina, Tatiana N.; Annenkov, Vadim V.

doi:10.3998/ark.5550190.0014.320

Cited by 8 publications

(2 citation statements)

References 16 publications

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“…N 1 ,N 3 ‐dimethyl‐N 1 ‐(7‐nitro‐2,1,3‐benzoxadiazol‐4‐yl)propane‐1,3‐diamine (NBD‐N2H) and N 1 ‐[3‐(dimethylamino)propyl]‐N 1 ,N 3 ‐dimethyl‐N 3 ‐(7‐nitro‐benzo[1,2,5]oxadiazol‐4‐yl)‐1,3‐propanediamine (NBD‐N3) were prepared according to Danilovtseva et al. (2013). Trimethyl aconitate was synthesized according to Kratschmera et al.…”

Section: Methodsmentioning

confidence: 99%

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The Probable Mechanism for Silicon Capture by Diatom Algae: Assimilation of Polycarbonic Acids with Diatoms—Is Endocytosis a Key Stage in Building of Siliceous Frustules?

Annenkov

Gordon²,

Zelinskiy

et al. 2020

Journal of Phycology

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Many organisms including unicellular (diatoms, radiolaria, and chrysophytes), higher plants (rice and horsetail) and animals (sponges) use silica as a main part of skeletons. The bioavailable form of silicon is silicic acid and the mechanism of silicic acid penetration into living cells is still an enigma. Macropinocytosis was assumed as a key stage of the silicon capture by diatoms but assimilation of monomeric silicic acid by this way requires enormous amounts of water to be passed through the cell. We hypothesized that silicon can be captured by diatoms via endocytosis in the form of partially condensed silicic acid (oligosilicates) whose formation on the diatom surface was supposed. Oligosilicates are negatively charged nanoparticles and similar to coils of poly(acrylic acid) (PAA). We have synthesized fluorescent tagged PAA as well as several neutral and positively charged polymers. Cultivation of the diatom Ulnaria ferefusiformis in the presence of these polymers showed that only PAA is able to penetrate into siliceous frustules. The presence of PAA in the frustules was confirmed with chromatography and PAA causes various aberrations of the valve morphology. Growth of U. ferefusiformis and two other diatoms in the presence of tri-and tetracarbonic fluorescent tagged acids points to the ability of diatoms to recognize substances that bear four acidic groups and to include them into siliceous frustules. Thus, partial condensation of silicic acid is a plausible first stage of silicon assimilation.

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Section: Methodsmentioning

confidence: 99%

“…,5]oxadiazol-4-yl)-1,3-propanediamine (NBD-N3) were prepared according to Danilovtseva et al (2013). Trimethyl aconitate was synthesized according to Kratschmera et al (2001).…”

Section: Methodsmentioning

confidence: 99%

The Probable Mechanism for Silicon Capture by Diatom Algae: Assimilation of Polycarbonic Acids with Diatoms—Is Endocytosis a Key Stage in Building of Siliceous Frustules?

Annenkov

Gordon²,

Zelinskiy

et al. 2020

Journal of Phycology

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Unusual Polyamines from Baikalian Diatoms

et al. 2018

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Siliceous frustules of diatom algae contain a low amount of organic substances which are buried in the silicon dioxide and remain intact after a thousands years in marine and lake sediments. These substances are studied as potential silicification agents which are responsible for formation of the biosilica. On the other hand, the organic compounds from sediments are a prospective source of carbon and nitrogen for isotopic paleoreconstructions. The main part of these compounds from marine diatoms consists of polyamines which contain trimethylene insertions between nitrogen atoms. The study of polyamines from siliceous frustules of Baikalian diatom Stephanodiscus meyeri Genkal & Popovskaya revealed the presence of a new type of polyamine that contains tetramethylene insertions between nitrogen atoms in the repeating units. The other freshwater diatom Ulnaria ferefusiformis Kulikovskiy & Lange‐Bertalot contained polyamines with trimethylene insertions similar to those in the previously‐studied marine diatoms and the Baikal sediments contained polyamines of both types. These results are important to understanding the role of polyamines in silica biosynthesis. The species specificity of the polyamine structure can be applied as a new paleo marker.

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