THE PLANT CELL, Vol 1, Issue 7 681-690, Copyright © 1989 by American Society of Plant Biologists
Characterization of a Single Copy Gene Encoding Ferredoxin I from Pea
R. C. Elliott, T. J. Pedersen, B. Fristensky, M. J. White, L. F. Dickey and W. F. Thompson
Department of Botany and Department of Genetics, North Carolina State University, Raleigh, North Carolina 27695
We have isolated, mapped, and sequenced a genomic clone containing the
ferredoxin I (Fed-1) gene from Pisum sativum. The gene is present as a
single copy per haploid genome. It has no introns, and it specifies a
753-nucleotide transcript encoding a 149-amino acid protein including a
52-residue transit peptide. Upstream sequences from Fed-1 contain several
elements with similarity to transcriptional regulatory elements from RbcS
and Cab genes, and gel mobility shift assays show that nuclear extracts
from light-grown pea leaves contain one or more DNA binding activities
specific for Fed-1 5[prime]-flanking sequences. RbcS and Cab regulatory
sequences are only weak competitors for this binding, however, and the RbcS
and Cab similarities mostly lie outside of the region essential for
binding. These data are discussed in terms of previously observed
physiological differences between the light responses of Fed-1 and other
genes.