REGULATION OF BIOSYNTHESIS OF DIMETHYLSULFONIOPROPIONATE AND ITS UPTAKE IN STERILE MUTANT OF ULVA PERTUSA (CHLOROPHYTA)1
© 2011 Phycological Society of America.
| Veröffentlicht in: | Journal of phycology. - 1966. - 47(2011), 3 vom: 20. Juni, Seite 517-523 |
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| Weitere Verfasser: | , , |
| Format: | Online-Aufsatz |
| Sprache: | English |
| Veröffentlicht: |
2011
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| Zugriff auf das übergeordnete Werk: | Journal of phycology |
| Schlagworte: | Journal Article DMSP Ulva green algae salt stress sulfur deficiency |
| Zusammenfassung: | © 2011 Phycological Society of America. It has been shown that marine algae produce the compatible solute dimethylsulfoniopropionate (DMSP) from methionine (Met) via four enzymatic reactions in which the third step, synthesis of 4-dimethylsulfonio-2-hydroxy-butyrate (DMSHB) from 4-methylthio-2-hydroxybutyrate (MTHB), is the committing step. However, regulation of the biosynthetic pathways and transport properties of DMSP is largely unknown. Here, the effects of sulfur and sodium concentrations on the uptake and synthesis of DMSHB and DMSP were examined in a sterile mutant of Ulva pertusa Kjellm. Sulfur deficiency increased the activity of the sulfur assimilation enzyme O-acetyl serine sulfhydrylase but decreased the MTHB S-methyltransferase activity, suggesting the preferential utilization of sulfur atoms for Met metabolites other than DMSP. Uptake of DMSP and DMSHB was enhanced by S deficiency. High salinity enhanced the MTHB S-methyltransferase activity as well as the uptake of DMSHB. The MTHB S-methyltransferase activity was inhibited by its product DMSP. These data demonstrate the importance of MTHB S-methyltransferase activity and uptake of DMSHB for the regulation of DMSP |
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| Beschreibung: | Date Revised 20.11.2019 published: Print-Electronic Citation Status Publisher |
| ISSN: | 0022-3646 |
| DOI: | 10.1111/j.1529-8817.2011.00977.x |