Structure of the Gene (tmpA) for the “32,000-Mr” Thylakoid Membrane Polypeptide of Spinacia Oleracea and Nicotiana Debneyi
One of the most rapidly labeled products of chloroplast protein synthesis is a polypeptide of Mr 32,000–36,0001,2,3,4. It is synthesized as a precursor of Mr 33,500–34,5003,4 and does not accumulate in the organelle but is rapidly turned over4. Recently the polypeptide has been shown to be involved in the binding of the herbicides atrazine and DCMU and to be part of Photosystem II with a role in electron flow5. The gene (tmpA) for this polypeptide has been mapped on the chloroplast genome of a number of plant species. In spinach, as in most other plants so far studied, tmpA is located in the large single copy region of the chloroplast genome very close to the end of one of the inverted repeat regions6.
KeywordsChloroplast Genome Spinach Chloroplast Spinacia OLERACEA Herbicide Atrazine Large Single Copy Region
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- 4.M. Edelman and A. Reisfeld, Characterization, translation and control of the 32,000 dalton chloroplast membrane protein in Spivodela, in “Chloroplast Development” G. Akoyunoglou and J.H. Argyroudi-Akoyunoglou, eds. Elsevier North-Holland, Amsterdam, New York (1978).Google Scholar