Journal of Molecular Evolution

, Volume 64, Issue 3, pp 321–331

Evolution of the Inner Light-Harvesting Antenna Protein Family of Cyanobacteria, Algae, and Plants

  • Yinan Zhang
  • Min Chen
  • Bing Bing Zhou
  • Lars S. Jermiin
  • Anthony W. D. Larkum
Article

DOI: 10.1007/s00239-006-0058-2

Cite this article as:
Zhang, Y., Chen, M., Zhou, B.B. et al. J Mol Evol (2007) 64: 321. doi:10.1007/s00239-006-0058-2

Abstract

Two hypotheses account for the evolution of the inner antenna light-harvesting proteins of oxygenic photosynthesis in cyanobacteria, algae, and plants: one in which the CP43 protein of photosytem II gave rise to the extrinsic CP43-like antennas of cyanobacteria (i.e. IsiA and Pcb proteins), as a late development, and the other in which CP43 and CP43-like proteins derive from an ancestral protein. In order to determine which of these hypotheses is most likely, we analyzed the family of antenna proteins by a variety of phylogenetic techniques, using alignments of the six common membrane-spanning helices, constructed using information on the antenna proteins’ three-dimensional structure, and surveyed for evidence of factors that might confound inference of a correct phylogeny. The first hypothesis was strongly supported. As a consequence, we conclude that the ancestral photosynthetic apparatus, with 11 membrane-spanning helices, split at an early stage during evolution to form, on the one hand, the reaction center of photosystem II and, on the other hand, the ancestor of inner antenna proteins, CP43 (PsbC) and CP47 (PsbB). Only much later in evolution did the CP43 lineage give rise to the CP43’ proteins (IsiA and Pcb) of cyanobacteria.

Keywords

Antenna proteinChlorophyll-binding proteinPhylogenetic analysisStructural modeling

Copyright information

© Springer Science+Business Media, Inc. 2007

Authors and Affiliations

  • Yinan Zhang
    • 1
    • 2
  • Min Chen
    • 1
  • Bing Bing Zhou
    • 3
  • Lars S. Jermiin
    • 1
    • 2
  • Anthony W. D. Larkum
    • 1
    • 2
  1. 1.School of Biological Sciences, Heydon-Laurence Building A08University of SydneySydneyAustralia
  2. 2.Sydney University Biological Informatics & Technology Centre (SUBIT)University of SydneySydneyAustralia
  3. 3.School of Information TechnologiesUniversity of SydneySydneyAustralia