Triazine herbicide resistance in the photosynthetic bacterium Rhodopseudomonas sphaeroides

Journal Article · Mon Oct 01 04:00:00 EDT 1984 · Proc. Natl. Acad. Sci. U.S.A.; (United States)

DOI:https://doi.org/10.1073/pnas.81.20.6310· OSTI ID:5933026

Brown, A E; Gilbert, C W; Guy, R; Arntzen, C J

The photoaffinity herbicide azidoatrazine (2-azido-4-ethylamino-6-isopropylamino-s-triazine) selectively labels the L subunit of the reaction center of the photosynthetic bacterium Rhodopseudomonas sphaeroides. Herbicide-resistant mutants retain the L subunit and have altered binding properties for methylthio- and chloro-substituted triazines as well as altered equilibrium constants for electron transfer between primary and secondary electron acceptors. We suggest that a subtle alteration in the L subunit is responsible for herbicide resistance and that the L subunit is the functional analog of the 32-kDa Q/sub B/ protein of chloroplast membranes. 42 references, 6 figures, 1 table.

• Research Organization: Auburn Univ., AL
• DOE Contract Number: AC02-76ER01338
• OSTI ID: 5933026
• Journal Information: Proc. Natl. Acad. Sci. U.S.A.; (United States), Journal Name: Proc. Natl. Acad. Sci. U.S.A.; (United States) Vol. 81:20; ISSN PNASA
• Country of Publication: United States
• Language: English

Related Subjects

550200* -- Biochemistry
59 BASIC BIOLOGICAL SCIENCES
AZINES
BACTERIA
BIOCHEMICAL REACTION KINETICS
CELL CONSTITUENTS
CELL MEMBRANES
CHEMICAL BONDS
CHEMICAL REACTIONS
CHLOROPLASTS
ELECTRON TRANSFER
HERBICIDES
HETEROCYCLIC COMPOUNDS
KINETICS
MEMBRANES
MICROORGANISMS
MUTANTS
ORGANIC COMPOUNDS
ORGANIC NITROGEN COMPOUNDS
PESTICIDES
PHOTOCHEMICAL REACTIONS
PHOTOSENSITIVITY
PHOTOSYNTHESIS
PHOTOSYNTHETIC REACTION CENTERS
REACTION KINETICS
RHODOPSEUDOMONAS
SENSITIVITY
SYNTHESIS
TRIAZINES