A Ferredoxin-type Iron-sulfur Protein Gene, Frx B, is Expressed in the Chloroplasts of Tobacco and Spinach
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Previously, a ferredoxin-type iron-sulfur protein, frx B protein, was identified in a high-salt extract of the purified thylakoid membrane of Chlamydomonas reinhardtii, a unicellular green alga. Polyclonal antibody was raised against a synthetic pentadecameric peptide with an amino acid sequence corresponding to the highly conserved region of the putative frx B proteins of 3 land plants. In this report, protein(s) reacting strongly and specifically with this antibody was detected in the equivalent high-salt extract prepared from purified chloroplast of spinach and tobacco. One strong reaction polypeptide band from tobacco chloroplast was purified from SDS-polyacrylamide gel and subjected to endoproteinase lys C digestion. The resulting polypeptides were separated by reversed-phase chromatography. N-terminal sequencing of 3 purified polypeptides revealed that the protein is encoded by the 'frxB gene' identified from DNA sequence analysis.
Wakasugi T, Tsudzuki J, Ito S, Nakashima K, Tsudzuki T, Sugiura M Proc Natl Acad Sci U S A. 1994; 91(21):9794-8.
PMID: 7937893 PMC: 44903. DOI: 10.1073/pnas.91.21.9794.
Internal editing of the maize chloroplast ndhA transcript restores codons for conserved amino acids.
Maier R, Hoch B, Zeltz P, Kossel H Plant Cell. 1992; 4(5):609-16.
PMID: 1498612 PMC: 160157. DOI: 10.1105/tpc.4.5.609.