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  Dimethylsulfoniopropionate production in phototrophic organisms and its physiological function as a cryoprotectant
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Karsten_1996.pdf (Verlagsversion), 2MB
 
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 Urheber:
Karsten, Ulf1, Autor           
Kuck, K, Autor
Vogt, C, Autor
Kirst, GO, Autor
Affiliations:
1Permanent Research Group Microsensor, Max Planck Institute for Marine Microbiology, Max Planck Society, Celsiusstraße 1, 28359 Bremen, DE, ou_2481711              

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 Zusammenfassung: Dimethylsulfoniopropionate (DMSP) was detected in many strains of prototrophic bacteria and cyanobacteria. These data, together with results from earlier studies and the literature, clearly indicate that mainly photosynthetic micro- and macroorganisms have the metabolic capability to synthesize this compound. A relationship with temperature has also been identified. Polar macroalgae contain significantly higher DMSP contents compared to temperate or tropical species (5, 17). In this study, the cryoprotective function of DMSP was investigated on the activity of the model enzyme lactate dehydrogenase (LDH) as well as on that of malate dehydrogenase (MDH), extracted from the polar alga Acrosiphonia arcta (Chlorophyta). LDH activity was stabilized during freezing and thawing by the presence of DMSP concentrations up to 230 mM. The addition of higher amounts of DMSP to the enzyme assay even led to a 1.5 fold stimulation in the activity. DMSP stabilized MDH activity at the extremely low temperature of -2°C. In the presence of high solute concentrations, up to 300 mM, the enzyme activity rose to 165% of the control.

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Sprache(n): eng - English
 Datum: 1996
 Publikationsstatus: Erschienen
 Seiten: 11
 Ort, Verlag, Ausgabe: -
 Inhaltsverzeichnis: -
 Art der Begutachtung: -
 Identifikatoren: ISI: A1996BF97H00013
 Art des Abschluß: -

Veranstaltung

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Titel: 1st International Symposium on DMSP and Related Sulfonium Compounds
Veranstaltungsort: Mobile, AL
Start-/Enddatum: 1995-06-05 - 1995-06-08

Entscheidung

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Titel: Biological and environmental chemistry of DMSP and related sulfonium compounds
Genre der Quelle: Konferenzband
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Ort, Verlag, Ausgabe: -
Seiten: - Band / Heft: - Artikelnummer: - Start- / Endseite: 143 - 153 Identifikator: ISBN: 0-306-45306-1