Linked Life Data

12221987

Source:http://linkedlifedata.com/resource/pubmed/id/12221987

Statements in which the resource exists as a subject.
PredicateObject
rdf:type
lifeskim:mentions
pubmed:dateCreated
2002-9-11
pubmed:abstractText
The origin of photosynthesis is a fundamental biological question that has eluded researchers for decades. The complexity of the origin and evolution of photosynthesis is a result of multiple photosynthetic components having independent evolutionary pathways. Indeed, evolutionary scenarios have been established for only a few photosynthetic components. Phylogenetic analysis of Mg-tetrapyrrole biosynthesis genes indicates that most anoxygenic photosynthetic organisms are ancestral to oxygen-evolving cyanobacteria and that the purple bacterial lineage may contain the most ancestral form of this pigment biosynthesis pathway. The evolutionary path of type I and type II reaction center apoproteins is still unresolved owing to the fact that a unified evolutionary tree cannot be generated for these divergent reaction center subunits. However, evidence for a cytochrome b origin for the type II reaction center apoproteins is emerging. Based on the combined information for both photopigments and reaction centers, a unified theory for the evolution of reaction center holoproteins is provided. Further insight into the evolution of photosynthesis will have to rely on additional broader sampling of photosynthesis genes from divergent photosynthetic bacteria.
pubmed:grant
pubmed:language
eng
pubmed:journal
pubmed:citationSubset
IM
pubmed:chemical
pubmed:status
MEDLINE
pubmed:issn
1543-5008
pubmed:author
pubmed:issnType
Print
pubmed:volume
53
pubmed:owner
NLM
pubmed:authorsComplete
Y
pubmed:pagination
503-21
pubmed:dateRevised
2007-11-14
pubmed:meshHeading
pubmed:year
2002
pubmed:articleTitle
Complex evolution of photosynthesis.
pubmed:affiliation
Department of Biology, Texas A&M University, College Station, Texas 77843, USA. xiong@mail.bio.tamu.edu
pubmed:publicationType
Journal Article, Research Support, U.S. Gov't, P.H.S., Research Support, U.S. Gov't, Non-P.H.S., Review, Research Support, Non-U.S. Gov't