Nucleic Acids Research, 1984, Vol. 12, No. 2 945-958
© 1984
MOLECULAR BIOLOGY |
Structure of the chloroplast gene for the precursor of the Mr 32,000 photosystem II protein from mustard (Sinapis alba L.)
Biologisches Institut II der Universitat Freiburg Schänzlestrasse 1, D-7800 Freiburg, FRG
Received November 3, 1983. Accepted December 6, 1983.
The nucleotide sequence of the mustard chloroplast gene for the precursor of the Mr32,000 photosystein II protein is presented. A comparison with the rcorresponding genes from spinach and Nicotiana debneyi (14)reveals less than 5% nucleotide divergence in the coding region. The derived protein of mustard differs from the corresponding proteins by three amino acid positions at the C-terminus. We have defined the presumed transcription start and termination sites of the mustard gene. Upstream from the start site are sequences typical of a prokaryotic promoter and, also, a sequence that resembles the eukaryotic TATA box. A search for intrastrand base pairing revealed stem-loop secondary structure at the transcription start and termination sites and in the region preceding the presumed promoter. This latter region is a 69-base-pair sequence element unique to the 5'flanking sequence of the mustard gene.
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