Linked Life Data

12000965

Source:http://linkedlifedata.com/resource/pubmed/id/12000965

Statements in which the resource exists as a subject.
PredicateObject
rdf:type
lifeskim:mentions
pubmed:issue
6885
pubmed:dateCreated
2002-5-9
pubmed:databankReference
pubmed:abstractText
Plants use a set of light sensors to control their growth and development in response to changes in ambient light. In particular, phytochromes exert their regulatory activity by switching between a biologically inactive red-light-absorbing form (Pr) and an active far-red-light absorbing form (Pfr). Recently, biochemical and genetic studies have demonstrated the occurrence of phytochrome-like proteins in photosynthetic and non-photosynthetic bacteria--but little is known about their functions. Here we report the discovery of a bacteriophytochrome located downstream from the photosynthesis gene cluster in a Bradyrhizobium strain symbiont of Aeschynomene. The synthesis of the complete photosynthetic apparatus is totally under the control of this bacteriophytochrome. A similar behaviour is observed for the closely related species Rhodopseudomonas palustris, but not for the more distant anoxygenic photosynthetic bacteria of the genus Rhodobacter, Rubrivivax or Rhodospirillum. Unlike other (bacterio)phytochromes, the carboxy-terminal domain of this bacteriophytochrome contains no histidine kinase features. This suggests a light signalling pathway involving direct protein-protein interaction with no phosphorelay cascade. This specific mechanism of regulation may represent an important ecological adaptation to optimize the plant-bacteria interaction.
pubmed:language
eng
pubmed:journal
pubmed:citationSubset
IM
pubmed:chemical
pubmed:status
MEDLINE
pubmed:month
May
pubmed:issn
0028-0836
pubmed:author
pubmed:issnType
Print
pubmed:day
9
pubmed:volume
417
pubmed:owner
NLM
pubmed:authorsComplete
Y
pubmed:pagination
202-5
pubmed:dateRevised
2005-11-17
pubmed:meshHeading
pubmed:year
2002
pubmed:articleTitle
Bacteriophytochrome controls photosystem synthesis in anoxygenic bacteria.
pubmed:affiliation
LSTM TA 10/J Laboratoire des Symbioses Tropicales et Méditerranéennes, UMR 113, IRD/CIRAD/INRA/ENSA-M. Campus de Baillarguet, 34398 Montpellier Cedex 5, France.
pubmed:publicationType
Journal Article