A regulation of the ATP-synthesizing complex by electron-transport rate has been found. The site of regulation could be localized within the Photosystem I region. The regulatory effect probably is produced by direct interactions between neighbouring charged protein complexes. The primary result is an increase in the percentage of those binding sites adopting a low-affinity state. This seems to lead to an enhanced leakage of protons out of the thylakoids, especially under those experimental conditions employing low nucleotide concentrations. Changes in the P/2e ratio can be observed, especially if the total ADP + ATP concentration used in the experiment is below 200 microM.
Research Article|February 15 1986
A direct interaction between Photosystem I and the chloroplast coupling factor
Biochem J (1986) 234 (1): 217-220.
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B Huchzermeyer, A Loehr, I Willms; A direct interaction between Photosystem I and the chloroplast coupling factor. Biochem J 15 February 1986; 234 (1): 217–220. doi: https://doi.org/10.1042/bj2340217
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