The Effect of Various Stresses on the Expression of Genes Encoding the Secreted Proteins of the Cyanobacterium Synechocystis sp. PCC 6803

The Effect of Various Stresses on the Expression of Genes Encoding the Secreted Proteins of the... The effects of various stresses (osmotic, salt, low-temperature, high-temperature, and high-light stress) on the amount of mRNA of eight genes encoding the secreted proteins of Synechocystis sp. PCC 6803 were studied. Osmotic stress (0.5 M sorbitol) reduced the amount of all mRNAs, with the exception of slr0924. Supposedly, this gene encodes Tic22, a polypeptide involved in the formation of the transport system for proteins crossing the internal thylakoid membrane on the way to the lumen. Salt stress (0.5 M NaCl) inhibited the expression of all genes for secreted proteins almost completely. Low temperature (20°C) did not affect the expression of the sll1891 gene of an unknown function and the slr0924 gene. The high temperature (44°C) suppressed the expression of all genes tested. A detailed study of the expression of the sll1694 (pilA1) gene, which encodes the main structural protein of cyanobacterial pili, pilin PilA1, demonstrated that virtually all stresses suppressed its expression. Thus, various stresses were shown to suppress the expression of most genes encoding Synechocystis secreted proteins. http://www.deepdyve.com/assets/images/DeepDyve-Logo-lg.png Russian Journal of Plant Physiology Springer Journals

The Effect of Various Stresses on the Expression of Genes Encoding the Secreted Proteins of the Cyanobacterium Synechocystis sp. PCC 6803

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Publisher
Springer Journals
Copyright
Copyright © 2002 by MAIK “Nauka/Interperiodica”
Subject
Life Sciences; Plant Sciences
ISSN
1021-4437
eISSN
1608-3407
D.O.I.
10.1023/A:1020293019304
Publisher site
See Article on Publisher Site

Abstract

The effects of various stresses (osmotic, salt, low-temperature, high-temperature, and high-light stress) on the amount of mRNA of eight genes encoding the secreted proteins of Synechocystis sp. PCC 6803 were studied. Osmotic stress (0.5 M sorbitol) reduced the amount of all mRNAs, with the exception of slr0924. Supposedly, this gene encodes Tic22, a polypeptide involved in the formation of the transport system for proteins crossing the internal thylakoid membrane on the way to the lumen. Salt stress (0.5 M NaCl) inhibited the expression of all genes for secreted proteins almost completely. Low temperature (20°C) did not affect the expression of the sll1891 gene of an unknown function and the slr0924 gene. The high temperature (44°C) suppressed the expression of all genes tested. A detailed study of the expression of the sll1694 (pilA1) gene, which encodes the main structural protein of cyanobacterial pili, pilin PilA1, demonstrated that virtually all stresses suppressed its expression. Thus, various stresses were shown to suppress the expression of most genes encoding Synechocystis secreted proteins.

Journal

Russian Journal of Plant PhysiologySpringer Journals

Published: Oct 13, 2004

References

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