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Current Microbiology

, Volume 48, Issue 6, pp 438–440 | Cite as

Sequence of the Core Antenna Domain from the Anoxygenic Phototroph Heliophilum fasciatum: Implications for Diversity of Reaction Center Type I

  • Lucas J. Mix
  • Tara L. Harmer
  • Colleen M. Cavanaugh
Article

Abstract

Broad variation among anoxygenic reaction centers makes it essential to consider a wide variety when considering the origins of photosynthesis. The photosynthetic core antenna domain in the gene pshA from Heliophilum fasciatum was sequenced doubling the number of core sequences available from heliobacteria. The sequence shares a pattern of hydrophobicity and histidine residues with the core antenna domain of pshA from Heliobacillus mobilis. Sequence identity between the two pshA sequences was 68%, indicating heliobacterial reaction centers show similar diversity to photosystem I throughout cyanobacteria and plastids. Thus, the diversity of anoxygenic phototrophic reaction centers may be greater than previously thought.

Keywords

Photosynthesis Histidine Reaction Center Similar Diversity Broad Variation 
These keywords were added by machine and not by the authors. This process is experimental and the keywords may be updated as the learning algorithm improves.

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Copyright information

© Springer-Verlag New York Inc. 2004

Authors and Affiliations

  • Lucas J. Mix
    • 1
  • Tara L. Harmer
    • 1
  • Colleen M. Cavanaugh
    • 1
  1. 1.Department of Organismic and Evolutionary Biology, Harvard University, Cambridge, MA 02138United States

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