Statements in which the resource exists as a subject.
PredicateObject
rdf:type
lifeskim:mentions
pubmed:issue
4
pubmed:dateCreated
2002-1-24
pubmed:abstractText
During complementary chromatic adaptation (CCA), cyanobacterial light harvesting structures called phycobilisomes are restructured in response to ambient light quality shifts. Transcription of genes encoding components of the phycobilisome is differentially regulated during this process: red light activates cpcB2A2, whereas green light coordinately activates the cpeCDE and cpeBA operons. Three signal transduction components that regulate CCA have been isolated to date: a sensor-photoreceptor (RcaE) and two response regulators (RcaF and RcaC). Mutations in the genes encoding these components affect the accumulation of both cpcB2A2 and cpeBA gene products. We have isolated and characterized a new pigmentation mutant called Turquoise 1. We demonstrate that this mutant phenotype is due to a dramatic decrease in cpeBA transcript abundance and results from a lesion in the cpeR gene. However, in this mutant cpeCDE RNA levels remain near those found in wild-type cells. Our results show that the coordinate regulation of cpeBA and cpeCDE by green light can be uncoupled by the loss of CpeR, and we furnish the first genetic evidence that different regulatory mechanisms control these two operons. Sequence analysis of CpeR reveals that it shares limited sequence similarity to members of the PP2C class of protein serine/threonine phosphatases. We also demonstrate that cpeBA and cpeCDE retain light quality responsiveness in a mutant lacking the RcaE photoreceptor. This provides compelling evidence for the partial control of CCA through an as-yet-uncharacterized second light quality sensing system.
pubmed:commentsCorrections
http://linkedlifedata.com/resource/pubmed/commentcorrection/11807056-10412909, http://linkedlifedata.com/resource/pubmed/commentcorrection/11807056-10603474, http://linkedlifedata.com/resource/pubmed/commentcorrection/11807056-1409650, http://linkedlifedata.com/resource/pubmed/commentcorrection/11807056-1522075, http://linkedlifedata.com/resource/pubmed/commentcorrection/11807056-1694529, http://linkedlifedata.com/resource/pubmed/commentcorrection/11807056-2110150, http://linkedlifedata.com/resource/pubmed/commentcorrection/11807056-2231712, http://linkedlifedata.com/resource/pubmed/commentcorrection/11807056-2431391, http://linkedlifedata.com/resource/pubmed/commentcorrection/11807056-2464582, http://linkedlifedata.com/resource/pubmed/commentcorrection/11807056-3108238, http://linkedlifedata.com/resource/pubmed/commentcorrection/11807056-3127591, http://linkedlifedata.com/resource/pubmed/commentcorrection/11807056-3931221, http://linkedlifedata.com/resource/pubmed/commentcorrection/11807056-4199659, http://linkedlifedata.com/resource/pubmed/commentcorrection/11807056-5004410, http://linkedlifedata.com/resource/pubmed/commentcorrection/11807056-6402499, http://linkedlifedata.com/resource/pubmed/commentcorrection/11807056-6796414, http://linkedlifedata.com/resource/pubmed/commentcorrection/11807056-7569993, http://linkedlifedata.com/resource/pubmed/commentcorrection/11807056-8183345, http://linkedlifedata.com/resource/pubmed/commentcorrection/11807056-8211181, http://linkedlifedata.com/resource/pubmed/commentcorrection/11807056-8234495, http://linkedlifedata.com/resource/pubmed/commentcorrection/11807056-8431946, http://linkedlifedata.com/resource/pubmed/commentcorrection/11807056-8449886, http://linkedlifedata.com/resource/pubmed/commentcorrection/11807056-8458347, http://linkedlifedata.com/resource/pubmed/commentcorrection/11807056-856789, http://linkedlifedata.com/resource/pubmed/commentcorrection/11807056-8703080, http://linkedlifedata.com/resource/pubmed/commentcorrection/11807056-8808622, http://linkedlifedata.com/resource/pubmed/commentcorrection/11807056-9003755, http://linkedlifedata.com/resource/pubmed/commentcorrection/11807056-9023176, http://linkedlifedata.com/resource/pubmed/commentcorrection/11807056-9190806, http://linkedlifedata.com/resource/pubmed/commentcorrection/11807056-9254694, http://linkedlifedata.com/resource/pubmed/commentcorrection/11807056-9862122
pubmed:language
eng
pubmed:journal
pubmed:citationSubset
IM
pubmed:chemical
pubmed:status
MEDLINE
pubmed:month
Feb
pubmed:issn
0021-9193
pubmed:author
pubmed:issnType
Print
pubmed:volume
184
pubmed:owner
NLM
pubmed:authorsComplete
Y
pubmed:pagination
962-70
pubmed:dateRevised
2009-11-18
pubmed:meshHeading
pubmed:year
2002
pubmed:articleTitle
A turquoise mutant genetically separates expression of genes encoding phycoerythrin and its associated linker peptides.
pubmed:affiliation
Department of Biology, Indiana University, Bloomington, Indiana 47405, USA.
pubmed:publicationType
Journal Article, Research Support, U.S. Gov't, Non-P.H.S., Research Support, Non-U.S. Gov't