Work

Chloroplast coupling factor 1: A species-specific receptor for tentoxin

Year: 1976

Type: article

Abstract: Tentoxin, a cyclic tetrapeptide, induces chlorosis in certain plant species. It inactivated photophosphorylation and coupling factor 1 (CF(1)) ATPase in lettuce, a sensitive species. This effect was due to binding of tentoxin with CF(1) at a single site (affinity constant 1.3 to 20 x 10(7) M(-1)). Neither AMP nor adenyl-5'-yl imidodiphosphate appeared to bind to this site. In radish, an insensitive species, 20 times more tentoxin was required for 50% inhibition of photophosphorylation. In this species CF(1) ATPase was unaffected by tentoxin, and its CF(1) bound tentoxin only weakly (affinity constant less than 1 x 10(4) M(-1)). Sensitivity of photophosphorylation to tentoxin was correlated with chlorosis sensitivity in six other species examined.

Source: Proceedings of the National Academy of Sciences

DOI: 10.1073/pnas.73.7.2245

Authors: John A. Steele, Thomas F. Uchytil, Richard D. Durbin, Pradip Bhatnagar, Daniel H. Rich

Institutions: Agricultural Research Service, United States Department of Agriculture, University of Wisconsin–Madison

Language: English

Topic: Photosynthetic Processes and Mechanisms

Subfield: Molecular Biology

Field: Biochemistry, Genetics and Molecular Biology

Domain: Life Sciences

Open Access status: green

OpenAlex ID: W2053360783

FWCI: 1.981

Cites: 15

Cited by: 156

Related to: 10