Alterations in the accumulation of adenylylated nucleotides in heavy-metal-ion-stressed and heat-stressed Synechococcus sp. Strain PCC 6301, a cyanobacterium, in light and dark

Z. Palfi, G. Suranyi, G. Borbely

Research output: Contribution to journalArticle

20 Citations (Scopus)

Abstract

Heavy-metal-ion- (Cd2+, Cu2+, Pb2+, Hg2+ and Zn2+) or heat (50 °C)-stress treatments of the unicellular cyanobacterium Synechococcus sp., strain PCC 6301, under both light and dark conditions led to the accumulation of bis(5'-nucleosidyl)oligophosphates: Ap4A, Ap4G, Ap3A, Ap3G and Ap3Gp2. Under light regimens, the accumulation of Ap4A and Ap4G is more characteristic of heavy-metal-ion-stressed cells, whereas the accumulation of Ap3A, Ap3G and Ap3Gp2 is the dominant feature of heavy-metal-ion or heat-shock treatment during energy deprivation (i.e. in the dark). This accumulation of bisnucleoside oligophosphates supports a model whereby the adenylylated nucleotides are synthesized by the backward reaction of tRNA-aminoacyl synthetases. These nucleotides may also act to switch or modulate cyanobacterial responses under various environmental stress conditions.

Original languageEnglish
Pages (from-to)487-491
Number of pages5
JournalBiochemical Journal
Volume276
Issue number2
DOIs
Publication statusPublished - Jan 1 1991

ASJC Scopus subject areas

  • Biochemistry
  • Molecular Biology
  • Cell Biology

Fingerprint Dive into the research topics of 'Alterations in the accumulation of adenylylated nucleotides in heavy-metal-ion-stressed and heat-stressed Synechococcus sp. Strain PCC 6301, a cyanobacterium, in light and dark'. Together they form a unique fingerprint.

  • Cite this