Sequence of a psaC Gene from the Cyanobacterium Synechococcus sp. PCC 6301

Authors

Patricia L. Herman, University of Nebraska-LincolnFollow
Kartika Adiwilaga, University of Nebraska - Lincoln
John H. Golbeck, University of Nebraska - Lincoln
Donald P. Weeks, University of Nebraska-LincolnFollow

Document Type

Article

Date of this Version

1994

Citation

Plant Physiol. (1994) 104: 1459-1461

Comments

Copyright American Society of Plant Biologists. Used by permission.

Abstract

The psaC gene encodes PsaC, the apoprotein for the terminal iron-sulfur clusters, F_A and F_B, in the PSI reaction center of cyanobacteria, algae, and higher plants. PsaC functions as a membrane-bound oxidoreductase, accepting electrons from the F_x iron-sulfur cluster located on the PsaA/PsaB heterodimer and donating them to the soluble electron transfer proteins Fd and flavodoxin (reviewed in Bryant, 1992). The objective of our work is to clarify the role of PsaC in linear and cyclic electron transfer. The experimental organism is Syneckococcus sp. PCC 6301, a unicellular, freshwater cyanobacterium that is used extensively for physiological, biochemical, and spectroscopic studies of photosynthesis. The PSI complex of Syneckococcus sp. PCC 6301 is widely used in structural and functional studies of the F_A and F_B ironsulfur clusters (Parrett et al., 1990).