title: Unique origin and lateral transfer of prokaryotic chlorophyll-b and chlorophyll-d light-harvesting systems.
abstract: pcb genes, encoding proteins binding light-harvesting chlorophylls, were cloned and sequenced from the Chl d-containing cyanobacterium, Acaryochloris marina, and the Chl b-containing cyanobacterium, Prochloron didemni. Both organisms contained two tandem pcb genes. Peptide fingerprinting confirmed the expression of one of the A. marina pcb genes. Phylogenetic tree reconstruction using distance-matrix and maximum-likelihood methods indicated a single origin of the pcb gene family, whether occurring in Chl b-containing or Chl d-containing organisms. This may indicate widespread lateral transfer of the Pcb protein-based light-harvesting system.
authors.affiliation: School of Biological Sciences, University of Sydney, Australia.
authors.forename: Min
authors.initials: M
authors.lastname: Chen
authors.forename: Roger G
authors.initials: RG
authors.lastname: Hiller
authors.forename: Christopher J
authors.initials: CJ
authors.lastname: Howe
authors.forename: Anthony W D
authors.initials: AW
authors.lastname: Larkum
mesh_terms: D005075:Biological Evolution; D002734:Chlorophyll / Q000235:genetics* / Q000378:metabolism; D000458:Cyanobacteria / Q000737:chemistry*; D004269:DNA, Bacterial / Q000235:genetics / Q000378:metabolism; D045342:Light-Harvesting Protein Complexes / Q000235:genetics* / Q000378:metabolism; D008969:Molecular Sequence Data; D010802:Phylogeny; D019691:Prochloron / Q000737:chemistry*; D011485:Protein Binding
chemical_list: D004269:DNA, Bacterial; D045342:Light-Harvesting Protein Complexes; D002734:Chlorophyll; C037184:chlorophyll b; C107509:chlorophyll d