Linked Life Data

19729407

Source:http://linkedlifedata.com/resource/pubmed/id/19729407

Statements in which the resource exists as a subject.
PredicateObject
rdf:type
lifeskim:mentions
pubmed:issue
Pt 1
pubmed:dateCreated
2009-12-23
pubmed:abstractText
Inactivation of the sigC gene (sll0184), encoding the group 2 sigma factor SigC, leads to a heat-sensitive phenotype of Synechocystis sp. PCC 6803. Cells of the DeltasigC strain grew poorly at 43 degrees C at pH 7.5 under ambient CO(2) conditions. Addition of inorganic carbon in the form of 3 % CO(2) or use of an alkaline growth medium (pH 8.3) restored the growth of the DeltasigC strain at 43 degrees C. These treatments compensate for the low concentration of inorganic carbon at high temperature. However, addition of organic carbon as glucose, pyruvate, succinate or 2-oxoglutarate did not restore growth of the DeltasigC strain at 43 degrees C. In the control strain, the amount of the SigC factor diminished after prolonged incubation at 43 degrees C if the pH of the growth medium was 7.5 or 6.7. Under alkaline conditions, the amount of the SigC factor remained constant at 43 degrees C and cells of the control strain grew better than at pH 7.5 or pH 6.7. The pH dependence of high-temperature growth was associated with changes in photosynthetic activity, indicating that the SigC factor is involved in adjustment of photosynthesis according to the amount of available inorganic carbon. Our results indicate that acclimation to low inorganic carbon is a part of acclimation to prolonged high temperature and that the SigC factor has a central role in this acclimation.
pubmed:language
eng
pubmed:journal
pubmed:citationSubset
IM
pubmed:chemical
pubmed:status
MEDLINE
pubmed:month
Jan
pubmed:issn
1465-2080
pubmed:author
pubmed:issnType
Electronic
pubmed:volume
156
pubmed:owner
NLM
pubmed:authorsComplete
Y
pubmed:pagination
220-9
pubmed:meshHeading
pubmed:year
2010
pubmed:articleTitle
SigC sigma factor is involved in acclimation to low inorganic carbon at high temperature in Synechocystis sp. PCC 6803.
pubmed:affiliation
Plant Physiology and Molecular Biology, Department of Biology, University of Turku, FI-20014 Turku, Finland.
pubmed:publicationType
Journal Article, Research Support, Non-U.S. Gov't