Summary
Plastocyanin is a member of photosynthetic electron transport chains that transfers electrons from cytochrome f to the oxidized P700 chlorophyll a pigment of the photosystem I reaction center. We have isolated and characterized cDNA- and genomic clones from spinach (Spinacia oleracea) encoding the complete plastocyanin-precursor polypeptide. The amino acid sequence derived from the nucleotide sequence shows that the precursor consists of 168 amino acid residues including a transit sequence of 69 residues. The precursor polypeptide has a predicted Mr of 16,917, the mature protein of 10,413. The available data indicate that plastocyanin derives probably from a single-copy gene. The coding region contains no intron. The size of the mRNA as determined by S1 nuclease protection experiments is approximately 660 nucleotides, although analysis of different cDNA clones suggests that longer RNA species do exist, approaching the size of the mRNA (850 bases) estimated by Northern blot techniques.
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Dedicated to Prof. Dr. Fritz Kaudewitz on the occasion of his 65th birthday
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Rother, C., Jansen, T., Tyagi, A. et al. Plastocyanin is encoded by an uninterrupted nuclear gene in spinach. Curr Genet 11, 171–176 (1986). https://doi.org/10.1007/BF00420603
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DOI: https://doi.org/10.1007/BF00420603