Triazine herbicide resistance in the photosynthetic bacterium Rhodopseudomonas sphaeroides

Journal Article · Mon Oct 01 00:00:00 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), Vol. 81:20
• Country of Publication: United States
• Language: English

Related Subjects

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