title: Origin and evolution of transmembrane Chl-binding proteins: hydrophobic cluster analysis suggests a common one-helix ancestor for prokaryotic (Pcb) and eukaryotic (LHC) antenna protein superfamilies.
abstract: All chlorophyll (Chl)-binding proteins constituting the photosynthetic apparatus of both prokaryotes and eukaryotes possess hydrophobic domains, corresponding to membrane-spanning alpha-helices (MSHs). Hydrophobic cluster analysis of representative members of the different Chl protein superfamilies revealed that all Chl proteins except the five-helix reaction center II proteins and the small subunits of photosystem I possess related domains. As a major conclusion, we found that the eukaryotic antennae likely share a common precursor with the prokaryotic Chl a/b antennae from Chl-b-containing oxyphotobacteria. From these data, we propose a global scheme for the evolution of these proteins from a one-MSH ancestor.
authors.affiliation: Centre d'Etudes d'Océanographie et de Biologie Marine, CNRS-UMR 7127 et Université Pierre et Marie Curie, F-29682 Roscoff Cedex, France.
authors.forename: Laurence
authors.initials: L
authors.lastname: Garczarek
authors.forename: Anne
authors.initials: A
authors.lastname: Poupon
authors.forename: Frédéric
authors.initials: F
authors.lastname: Partensky
mesh_terms: D000595:Amino Acid Sequence; D001426:Bacterial Proteins / Q000737:chemistry / Q000235:genetics* / Q000378:metabolism; D002352:Carrier Proteins / Q000737:chemistry / Q000235:genetics / Q000378:metabolism; D002734:Chlorophyll / Q000378:metabolism*; D019143:Evolution, Molecular; D057927:Hydrophobic and Hydrophilic Interactions; D045342:Light-Harvesting Protein Complexes; D008565:Membrane Proteins / Q000737:chemistry / Q000235:genetics / Q000378:metabolism; D008969:Molecular Sequence Data; D010788:Photosynthesis / Q000502:physiology; D045322:Photosynthetic Reaction Center Complex Proteins / Q000737:chemistry / Q000235:genetics* / Q000378:metabolism; D045331:Photosystem I Protein Complex; D011485:Protein Binding / Q000235:genetics; D017433:Protein Structure, Secondary
chemical_list: D001426:Bacterial Proteins; D002352:Carrier Proteins; D045342:Light-Harvesting Protein Complexes; D008565:Membrane Proteins; D045322:Photosynthetic Reaction Center Complex Proteins; D045331:Photosystem I Protein Complex; D002734:Chlorophyll